Source: https://patents.google.com/patent/US20030076202?oq=No.+6%2C411%2C949
Timestamp: 2018-02-24 12:27:47
Document Index: 478798310

Matched Legal Cases: ['art 16', 'art 16', 'art 16', 'arts 16', 'arts 10', 'art 16', 'art 16', 'art 16', 'art 16', 'arts 16', 'arts 16', 'arts 16', 'arts 16', 'arts 16', 'arts 16', 'art.\n28', 'art.\n29']

US20030076202A1 - Magnetically influenced current or voltage regulator and a magnetically influenced converter - Google Patents
Magnetically influenced current or voltage regulator and a magnetically influenced converter
US20030076202A1
US20030076202A1 US10278908 US27890802A US2003076202A1 US 20030076202 A1 US20030076202 A1 US 20030076202A1 US 10278908 US10278908 US 10278908 US 27890802 A US27890802 A US 27890802A US 2003076202 A1 US2003076202 A1 US 2003076202A1
US10278908
US6933822B2 (en )
Espen Haugs
The invention relates to a magnetically influenced current or voltage regulator comprising a body (1) which is composed of a magnetisable material and provides a closed, magnetic circuit, at least one first electrical conductor (8) wound about the body of a first main winding (2) and at least one second electrical conductor (9) wound about the body of a second main winding (4). The winding axis (A2) for the main winding (2) is at right angles to the winding axis (A4) for the control winding (4) with the object of providing orthogonal magnetic fields (H1, B1 and H2, B2 respectively) in the body (1) and thereby controlling the behaviour of the magnetisable material relative to the field (H1, B1) in the main winding (2) by means of the field (H2, B2) in the control winding (4).
Even though it should not be considered limiting for the use of the device, it may, e.g., form part of a frequency converter for converting input frequency to randomly selected output frequency, preferably intended for operation of an asynchronous motor, where the frequency converter's input side has a three-phase supply which by means of its phase conductors feeds the input to at least one transformer intended for each of the converter's three-phase outputs, and where the outputs of such a transformer are connected via respective, selectively controllable voltage connectors, or via additional transformer-coupled voltage, connectors, in order to form one of the said three-phase outputs.
Speed control has recently been introduced for motors in underwater environments. The main challenge has been the d packing and operation of such systems. In this context, operation refers to service, maintenance, etc. Complex electronic systems generally have to operate in controlled environments with regard to temperature and pressure. Marine-based versions of such systems have to be encapsulated in containers filled with nitrogen maintaining a pressure of 1 atm. On account of heat generation as a result of heat loss in the electronics, a substantial amount of heat may be generated, thus resulting in the need for forced air cooling. This is usually solved by the use of fans. The fans introduce a component which dramatically reduces the working life of the system and represents a highly unsuitable solution.
At great depths (over 300 metres) a protective container for such a system will be extremely heavy, representing a fairly significant proportion of the total weight of the system. In addition, maintenance of a system more often than not will require the entire frequency converter to be raised, since even simpler maintenance is difficult to perform with a remotely operated vehicle (ROV).
This third embodiment of the device can also be adapted for use as a transformer by equipping the device with a third electrical conductor wound for at least one turn which forms a third main winding. In this case too the winding axis for the turn or turns in the third main winding may either be coincident with or parallel to the winding axis for the turn or turns in the first main winding, thus providing a transformer effect between the first and the third main windings when at least one of this is excited, or the winding axis for the turn or turns in the third main winding may be coincident with or parallel to the winding axis for the turn or turns in the control winding, thus providing a transformer effect between the third main winding and the control winding when at least one of this is excited
The voltage connector is without movable parts for absorbing electrical voltage between a generator and a load. The function of the connector is to be able to control the voltage between the generator and the load from 0-100% by means of a small control current. A second function will be as a pure voltage switch or as a current regulator. A further function could be forming and converting of a voltage curve.
The new technology according to the invention will be able to be used for upgrading existing diode rectifiers where there is a need for regulation. In connection with 12-pulse or 24-pulse rectifier systems, it will be possible to balance voltages in the system in a simple manner while having controllable diode rectification from 0-100%.
The flux resistance in a coil where the core is air is of the order of 1.000-900.000 times greater than for a winding which is wound round a core of ferromagnetic material. In the case of low flux resistance (iron core) little current is required to establish a flux which is necessary to generate a bucking voltage to the applied voltage, according to Faraday's Law. In the case of high flux resistance (air core) a large current is required in order to establish the flux necessary to generate the same induced bucking voltage.
[0043]FIGS. 1 and 2 illustrate the basic principle of the invention and a first embodiment thereof.
[0044]FIG. 3 is a schematic illustration of an embodiment of the device according to the invention.
[0045]FIG. 4 illustrates the areas of the different magnetic fluxes which form part of the device according to the invention.
[0046]FIG. 5 illustrates a first equivalent circuit for the device according to the invention.
[0047]FIG. 6 is a simplified block diagram of the device according to the invention.
[0048]FIG. 7 is a diagram for flux versus current.
[0049]FIGS. 8 and 9 illustrate magnetisation curves and domains for the magnetic material in the device according to the invention.
[0050]FIG. 10 illustrates flux densities for the main and control windings.
[0051]FIG. 11 illustrates a second embodiment of the invention.
[0052]FIG. 12 illustrates the same second embodiment of the invention.
[0053]FIGS. 13 and 14 illustrate the second embodiment in section.
[0057]FIG. 39 illustrates an assembled device according to the second embodiment of the invention.
[0058]FIGS. 40 and 41 are a section and a view of a third embodiment of the invention.
[0059]FIGS. 42, 43 and 44 illustrate special embodiments of magnetic field connectors for use in the third embodiment of the invention.
[0060]FIG. 45 illustrates the third embodiment of the invention adapted for use as a transformer.
[0061]FIGS. 46 and 47 are a section and a view of a fourth embodiment of the invention for use as a reluctance-controlled, flux-connected transformer.
[0062]FIGS. 48 and 49 illustrate the fourth embodiment of the invention adapted to suit a powder-based magnetic material, and thereby without magnetic field connectors.
[0063]FIGS. 50 and 51 are sections along lines VI-VI and V-V in FIG. 48.
[0064]FIGS. 52 and 53 illustrate a core adapted to suit a powder-based magnetic material, and thereby without magnetic field connectors.
[0065]FIG. 54 is an “X-ray picture” of a variant of the fourth embodiment of the invention.
[0066]FIG. 55 illustrates a second variant of the device according to the invention together with the principle behind a possibility for transformer connection.
[0067]FIG. 56 illustrates a proposal for an electro-technical schematic symbol for the voltage connector according to the invention.
[0068]FIG. 57 illustrates a proposal for a block schematic symbol for the voltage connector.
[0069]FIG. 58 illustrates a magnetic circuit where the control winding and control flux are not included.
[0071]FIG. 61 illustrates the use of the invention in an alternating current circuit.
[0072]FIG. 62 illustrates the use of the invention in a three-phase system.
[0073]FIG. 63 illustrates a use as a variable choke in DC-DC converters.
[0074]FIG. 64 illustrates a use as a variable choke in a filter together with condensers.
[0075]FIG. 65 illustrates a simplified reluctance model for the device according to the invention and a simplified electrical equivalent diagram for the connector according to the invention.
[0076]FIG. 66 illustrates the connection for a magnetic switch.
[0077]FIG. 67 illustrates examples of a three-phase use of the invention.
[0078]FIG. 68 illustrates the device employed as a switch.
[0079]FIG. 69 illustrates a circuit comprising 6 devices according to the invention.
[0080]FIG. 70 illustrates the use of the device according to the invention as a DC-AC converter.
[0081]FIG. 71 illustrates a use of the device according to the invention as an AC-DC converter.
The invention will now be explained in principle in connection with FIGS. 1a and 1 b.
[0084]FIG. 1a illustrates a device comprising a body 1 of a magnetisable material which forms a closed magnetic circuit. This magnetisable body or core 1 may be annular or of another suitable shape. Round the body 1 is wound a first main winding 2, and the direction of the magnetic field H1 (corresponding to the direction of the flux density B1) which will be created when the main winding 2 is excited will follow the magnetic circuit. The main winding 2 corresponds to a winding in an ordinary transformer. In an embodiment the device includes a second main winding 3 which in the same way as the main winding 2 is wound round the magnetisable body 1 and which will thereby provide a magnetic field which extends substantially along the body 1 (i.e. parallel to H1, B1). The device finally includes a third main winding 4 which in a preferred embodiment of the invention extends internally along the magnetic body 1. The magnetic field H2 (and thus the magnetic flux density B2) which is created when the third main winding 4 is excited will have a direction which is at right angles to the direction of the fields in the first and the second main winding (direction of H1, B1). The invention may also include a fourth main winding 5 which is wound round a leg of the body 1. When the fourth main winding 5 is excited, it will produce a magnetic field with a direction which is at right angles both to the field in the first (H1), the second and the third main winding (H2) (FIG. 3). This will naturally require the use of a closed magnetic circuit for the field which is created by the fourth main winding. This circuit is not illustrated in the figure, since the figure is only intended to illustrate the relative positions of the windings.
[0086]FIGS. 1b-1 g illustrate the definition of the axes and the direction of the different windings and the magnetic body. With regard to the windings, we shall call the axis the perpendicular to the surface which is restricted by each turn. The main winding 2 will have an axis A2, the main winding 3 an axis A3 and the control winding 4 an axis A4.
With regard to the magnetisable body, the longitudinal direction will vary with respect to the shape. If the body is elongated, the longitudinal direction A1 will correspond to the body's longitudinal axis. If the magnetic body is square as illustrated in FIG. 1a, a longitudinal direction A1 can be defined for each leg of the square. Where the body is tubular, the longitudinal direction A1 will be the tube's axis, and for an annular body the longitudinal direction A1 will follow the ring's circumference.
[0094]107 =angular frequency
N=number of turns for winding Φ = - j  1 N · ω · E
2) Current I = Φ · Rm N   Φ = I Rm · N
Aj=cross-sectional area of the flux path Rm = 1  j μ 0 · μ   r · Aj
ƒ{overscore (H)}.{overscore (ds)}=I.N
{overscore (H)}=field intensity
{overscore (β)}=μ0 ·μr {overscore (H)}
{overscore (H)}=magnetic field intensity
Φ=B·Aj 4)
The flux density B is composed of the vector sum of B1 and B2 (FIG. 4d). B1 is generated by the current I1 in the first main winding 2, and B1 has a direction tangentially to the conductors in the main winding 2. The main winding 2 has N1 turns and is wound round the magnetisable body 1. B2 is generated by the current I2 in the control winding 4 with N2 number of turns and where the control winding 4 is wound round the body 1. B2 will have a direction tangentially to the conductors in the control winding 4.
{overscore (B)}={overscore (B)} 1 +{overscore (B)} 2 5)
B2 is the vector which is generated by the control current. The cross-sectional surface A2 for the B2 vector will be the transversal surface of the magnetic body 1, cf. FIG. 4c. This may be a small surface limited by the thickness of the magnetisable body 1, given by the surface sector between the internal and external diameters of the body 1, in the case of an annular body. The cross-sectional surface A1 (see FIGS. 4a, b) for the B1 field on the other hand is given by the length of the magnetic core and the rating of applied voltage. This surface will be able to be 5-10 times larger than the surface of the control flux density B2, without this being considered limiting for the invention.
The inductance for the control winding 4 (with N2 turns) will be able to be rated at a small value suitable for pulsed control of the regulator, i.e. enabling a rapid reaction (of the order of milliseconds) to be provided. 6)
A2=Area of control flux density B2
I2=Length of flux path for control flux Ls = N2 2 · μ r - sat · μ 0 · A2 l2
Maxwell's equation curl  ( H _ ) = J _ +   t  D _ 7 )
ƒ({overscore (H)}){overscore (dl)}=I 9)
H 1 I 1 =N 1 ·I 1 11)
F 1 =N 1 ·I 1 12)
H 2 ·I 2 =N 2 ·I 2 13)
F 2 =N 2 ·I 2 14)
{overscore (B 1)}=μ0 ·μr 1 ·{overscore (H)} 1 15)
{overscore (B)} 2=μ0 ·μr 2 ·{overscore (H)} 2 16).
The permeability in the transversal direction is of the order of 1 to 2 decades less than for the longitudinal direction. The permeability for vacuum is: μ 0 = 4 · π · 10 - 7 · H m 17 )
By combining equations 11) and 15), for the main winding 2 we get: B 1 = μ o · μ r · N 1 · I 1 l 1 18 )
Φ1=ƒAj 0 {overscore (B)} 1 ·{overscore (n)}ds 19)
Assuming the flux is constant over the core cross section: Φ 1 = B 1 · A 1 = μ 0 · μ r  N 1  I 1  A 1 l 1 20 )
Here we recognise the expression for the flux resistance Rm or the reluctance as given under 3): Φ 1 = N 1  I 1 Rml 21 ) Rm 1 = l 1 μ 0 · μ r · A 1 22 )
In the same way we find flux and reluctance for the control winding 4: Φ 2 = N 2 · I 2 Rm 2 23 ) Rm 2 = I 2 μ 0 · μ   r 2 · A 2 24 )
According to Maxwell's equations, a time-varying magnetic field will induce a time-varying electrical field, expressed by ∫ E _ ·  l _ =   t  ( ∫ S  B _ · n _   s ) 25 )
The left side of the integral is an expression of the potential equation in integral form. The source of the field variation may be the voltage from a generator and we can express Faraday's Law when the winding has N turns and all flux passes through all the turns, see FIG. 5: e = N · A j ·   t  B = N ·   t  Φ =   t  λ 26 )
λ (Wb) gives an expression of the number of flux turns and is the sum of the flux through each turn in the winding. If one envisages the generator G in FIG. 5 being disconnected after the field is established, the source of the field variation will be the current in the circuit and from circuit technology we have, see FIG. 5a: e = L ·  i  t 27 )
Φ=k·I 28)
When L is constant, the combination of equations 26 and 27 gives:  λ  t = L   i  t 29 )
λ=L·i+C 30)
From 28 we derive that C is 0 and: L = λ i 31 )
L=N 2 /Rm 32)
XL=jwL 33)
dWelin=dWfld 34)
e=d/dt λ
e=d(L·i)/dt=L·di/dt+i·dL/dt 35)
p=i·e=i·d/dt λ 36)
dW elm =i·d(L·i)=i·(L·di+i·dl) 38)
When L is constant, i.e. when I2 is constant, we can disregard the section i x dL since dL is equal to 0, and thus the magnetic field energy will be given by: W flt = 1 2 · L · i 2 39 )
When L is varied by means of I2, the field energy will be altered as a result of the altered value of L, and thereby the current I will also be altered since it is associated with the field value-through the flux turns λ. Since i and λ are variable and functions of each other, while being non-linear functions, we shall not go into the solution here since it will involve mathematics which exceed the bounds of the description of the invention.
[0179]FIG. 8 illustrates the magnetisation curves for the entire material of the magnetisable body 1 and the domain change under the influence of the H1 field from the main winding 2.
[0180]FIG. 9 illustrates the magnetisation curves for the entire material of the magnetisable body 1 and the domain change under the influence of the H2 field in the direction from the control winding 4.
[0181]FIGS. 10a and 10 b illustrate the flux densities B1 (where the field H1 is established by the working current), and B2 (corresponding to the control current). The ellipse illustrates the saturation limit for the B fields, i.e. when the B field reaches the limit, this will cause the material of the magnetisable body 1 to reach saturation. The form of the ellipse's axes will be given by the field length and the permeability of the two fields B1 (H1) and B2 (H2) in the core material of the magnetisable body 1.
[0186]FIG. 11 is a schematic illustration of a second embodiment of the invention.
[0187]FIG. 12 illustrates the same embodiment of a magnetically influenced connector according to the invention, where FIG. 12a illustrates the assembled connector and FIG. 12b illustrates the connector viewed from the end.
[0188]FIG. 13 illustrates a section along line II in FIG. 12b.
As illustrated in the figures the magnetisable body 1 is composed of inter alia two parallel tubes 6 and 7 made of magnetisable material. An electrically insulated conductor 8 (FIGS. 12a, 13) is passed continuously in a path through the first tube 6 and the second tube 7 N number of times, where N=1, . . . r, forming the first main winding 2, with the conductor 8 extending in the opposite direction through the two tubes 6 and 7, as is clearly illustrated in FIG. 13. Even though the conductor 8 is only shown extending through the first tube 6 and the second tube 7 twice, it should be self-explanatory that it is possible for the conductor 8 to extend through respective tubes either only once or possibly several times (as indicated by the fact that the winding number N can vary from 0 to r), thus creating a magnetic field H1 in the parallel tubes 6 and 7 when the conductor is excited. A combined control and magnetisation winding 4, 4′, composed of the conductor 9, is wound round the first tube and the second tube ( 6 and 7 respectively) in such a manner that the direction of the field H2 (B2) which is created in the said tubes when the winding 4 is excited will be oppositely directed, as indicated by the arrows for the field B2 (H2) in FIG. 11. The magnetic field connectors 10, 11 are mounted at the ends of the respective pipes 6, 7 in order to interconnect the tubes fieldwise in a loop. The conductor 8 will be able to carry a load current 11 (FIG. 12a). The tubes' 6, 7 length and diameter will be determined on the basis of the power and voltage which have to be connected. The number of turns N1 on the main winding 2 will be determined by the reverse blocking ability for voltage and the cross-sectional area of the extent of the working flux φ2. The number of turns N2 on the control winding 4 is determined by the fields required for saturation of the magnetisable body 1, which comprises the tubes 6, 7 and the magnetic field connectors 10, 11.
[0190]FIG. 14 illustrates a special design of the main winding 2 in the device according to the invention. In reality, the solution in FIG. 14 differs from that illustrated in FIGS. 12 and 13 only by the fact that instead of a single insulated conductor 8 which is passed through the pipes 6 and 7, two separate oppositely directed conductors, so-called primary conductors 8 and secondary conductors 8′ are employed, in order thereby to achieve a voltage converter function for the magnetically influenced device according to the invention. This will now be explained in more detail. The design is basically similar to that illustrated in FIGS. 11, 12 and 13. The magnetisable body 1 comprises two parallel tubes 6 and 7. An electrically insulated primary conductor 8 is passed continuously in a path through the first tube 6 and the second tube 7 N1 number of times, where N1=1, . . . r, with the primary conductor 8 extending in the opposite direction through the two tubes 6 and 7. An electrically insulated secondary conductor 8′ is passed continuously in a path through the first tube 6 and the second tube 7 N1′ number of times, where N1′=1, . . . r, with the secondary conductor 8′ extending in the opposite direction relative to the primary conductor 8 through the two tubes 6 and 7. At least one combined control and magnetisation winding 4 and 4′ is wound round the first tube 6 and the second tube 7 respectively, with the result that the field direction created on the said tube is oppositely directed. As for the embodiment according to FIGS. 11, 12 and 13, magnetic field connectors 10, 11 are mounted on the end of respective tubes ( 6, 7) in order to interconnect the tubes 6 and 7 fieldwise in a loop, thereby forming the magnetisable body 1. Even though for the sake of simplicity the primary conductor 8 and the secondary conductor 8′ are illustrated in the drawings with only one pass through the tubes 6 and 7, it will be immediately apparent that both the primary conductor 8 and the secondary conductor 8′ will be able to be passed through the tubes 6 and 7 N1 and N1′ number of times respectively. The tubes' 6 and 7 length and diameter will be determined on the basis of the power and voltage which have to be converted. For a transformer with a conversion ratio (N1:N1′) equal to 10:1, in practice ten conductors will be used as primary conductors 8 and only one secondary conductor 8′.
[0192]FIG. 16 illustrates a thin insulating film 15 which will be placed between the end surface on tubes 6 and 7 and the magnetic field connector 10, 11 in a preferred embodiment of the invention.
[0193]FIGS. 17 and 18 illustrate other alternative embodiments of the magnetic field connectors 10, 11.
[0195]FIG. 19 illustrates a cylindrical core part 16 which is divided lengthwise as illustrated and where there are placed one or more layers 17 of an insulating material between the two core halves 16′, 16″.
[0196]FIG. 20 illustrates a rectangular core part 16 and FIG. 21 illustrates an embodiment of this core part 16 where it is divided in two with partial sections in the lateral surface. In the embodiment illustrated in FIG. 21, one or more layers of an insulating material 17 are provided between the core halves 16, 16′. A further variant is illustrated in FIG. 22 where the partial section is placed in each corner.
[0197]FIGS. 23, 24 and 25 illustrate a rectangular shape. FIGS. 26, 27 and 28 illustrate the same for a triangular shape. FIGS. 29 and 30 illustrate an oval variant, and finally FIGS. 31 and 32 illustrate a hexagonal shape. In FIG. 31 the hexagonal shape is composed of 6 equal surfaces 18 and in FIG. 30 the hexagon consists of two parts 16′ and 16″. Reference numeral 17 refers to a thin insulating film.
[0198]FIGS. 33 and 34 illustrate a magnetic field connector 10, 11 which can be used as a control field connector between the rectangular and square main cores 16 (illustrated in FIGS. 20-21 and 23-25 respectively). This magnetic field connector comprises three parts 10′, 10″ and 19.
[0199]FIG. 34 illustrates an embodiment of the core part or main core 16 where the end surface 14 or the connecting surface for the control flux is at right angles to the axis of the core part 16.
[0200]FIG. 35 illustrates a second embodiment of the core part 16 where the connecting surface 14 for the control flux is at an angle α to the axis of the core part 16.
[0202]FIG. 36 illustrates a magnetic field connector 10, 11 in which different hole shapes 12 are indicated for the main winding 2 on the basis of the shape of the core part 16 (round, triangular, etc.).
In FIG. 39 a an embodiment of the invention is illustrated with an assembly of magnetic field connectors 10, 11 and core parts 16. FIG. 39b illustrates the same embodiment viewed from the side.
[0208]FIGS. 40 and 41 are a sectional illustration and view respectively of a third embodiment of a magnetically influenced voltage connector device. The device comprises (see FIG. 40b) a magnetisable body 1 comprising an external tube 20 and an internal tube 21 (or core parts 16, 16′) which are concentric and made of a magnetisable material with a gap 22 between the external tube's 20 inner wall and the internal tube's 21 outer wall. Magnetic field connectors 10, 11 between the tubes 20 and 21 are mounted at respective ends thereof (FIG. 40a). A spacer 23 (FIG. 40a) is placed in the gap 22, thus keeping the tubes 20, 21 concentric. A combined control and magnetisation winding 4 composed of conductors 9 is wound round the internal tube 21 and is located in the said gap 22. The winding axis A2 for the control winding therefore coincides with the axis A1 of the tubes 20 and 21. An electrical current-carrying or main winding 2 composed of the current conductor 8 is passed through the internal tube 21 and along the outside of the external tube 20 N1 number of times, where N1=1, . . . r. With the combined control and magnetisation winding 4 in co-operation with the main winding 2 or the said current-carrying conductor 8, an easily constructed but efficient magnetically influenced voltage connector is obtained. This embodiment of the device may also be modified in such a manner that the tubes 20, 21 do not have a circular cross section, but a cross section which is square, rectangular, triangular, etc.
[0211]FIG. 42a illustrates in section and FIG. 42b in a view from above a magnetic field connector 10, 11 with connecting surfaces 14′ at an angle relative to the axis of the tubes 20, 21 (the core parts 16) and it is obvious that the internal 21 and external 20 tubes should also be at the same angle to the connecting surfaces 14.
[0212]FIGS. 43 and 44 illustrate other variants of the magnetic field connector 10, 11, where the connecting surfaces 14′ of the control field H2 (B2) are perpendicular to the main axis of the core parts 16 (tubes 20, 21). FIG. 43 illustrates a hollow semi-toroidal magnetic field connector 10, 11 with a hollow semi-circular cross section, while FIG. 44 illustrates a toroidal magnetic field connector with a rectangular cross section.
A variant of the device illustrated in FIGS. 40 and 41 is illustrated in FIG. 45, where FIG. 45a illustrates the device from the side while 45 b illustrates it from above. The only difference from the voltage connector in FIGS. 40-41 is that a second main winding 3 is wound in the same course as the main winding 2. By this means an easily constructed, but efficient magnetically influenced voltage converter is obtained.
[0214]FIGS. 46 and 47 are a section and a view illustrating a fourth embodiment of the voltage connector with concentric tubes.
[0215]FIGS. 46 and 47 illustrate the voltage connector which acts as a voltage converter with joined cores. An internal reluctance-controlled core 24 is located within an external core 25 round which is wound a main winding 2. The reluctance-controlled internal core 24 has the same construction as mentioned previously under the description of FIGS. 40 and 41, but the only difference is that there is no main winding 2 round the core 24. It has only a control winding 4 which is located in the gap 22 between the inner 21 and outer parts forming the internal reluctance-controlled core 24, with the result that only core 24 is magnetically reluctance-controlled under the influence of a control field H2 (B2) from current in the control winding 4.
The mode of operation of the reluctance-controlled voltage connector or converter-according to the invention and described in connection with FIGS. 46 and 47 will now be described.
We shall also refer to FIG. 55 which illustrates the principle of the connection, FIG. 65 with a simplified equivalent diagram for the reluctance model where Rmk is the variable reluctance which controls the flux between the windings 2 and 3, and FIG. 65b which illustrates an equivalent electrical circuit for the connection where Lk is the variable inductance.
When the reluctance-controlled core 24 is brought out of saturation by resetting the control flux B2 (H2) which is orthogonal to the working flux B1 (H1), the flux from the primary side will again be divided between the cores 24 and 25, and a load connected to the secondary winding 3 will only see a low reluctance and thereby high inductance and little connection between primary (V1) and secondary (V3) voltage. A voltage will be generated over the secondary winding 3, but on account of the magnitude of Lk compared to the magnetisation impedance Lm, most of the voltage (V1) from the primary winding 2 will overlay Lk. The flux from the primary winding 2 will essentially go where there is the least reluctance and where the flux path is shortest (FIG. 65b).
[0224]FIG. 48 describes a further variant of the fourth embodiment of a magnetically influenced voltage connector or voltage converter according to the invention, where the magnetisable body 1 is so designed that the control flux B2 (H2) is connected directly without a separate magnetic field connector through the main core 16.
[0225]FIG. 48 illustrates a voltage connector in the form of a toroid viewed from the side. The voltage connector comprises two core parts 16 and 16′, a main winding 2 and a control winding 4.
[0226]FIG. 49 illustrates a voltage connector according to the invention equipped with an extra main winding 3 which offers the possibility of converting the voltage.
[0227]FIG. 50 illustrates the device in FIG. 48 in section along line VI-VI in FIG. 48 and FIG. 51 illustrates a section along line V-V. In FIG. 50 a circular aperture 12 is illustrated for placing the control winding 4.
[0228]FIG. 51 illustrates an additional aperture 26 for passing through wiring.
[0229]FIGS. 52 and 53 illustrate the structure of a core 16 without windings and where the core 16 is so designed that there is no need for an extra magnetic field connector for the control field. The core 16 has two core parts 16, 16′ and an aperture 12 for a control winding 4. This design is intended for use where the magnetic material is sintered or compressed powder-moulded material. In this case it will be possible to insert closed magnetic field paths in the topology, with the result that what were previously separate connectors which were required for foil-wound cores form part of the actual core and are a productive part of the structure. The core, which forms the closed magnetic circuit without separate magnetic field connectors and which is illustrated in these FIGS. 52 and 53, will be able to be used in all the embodiments of the invention even though the figures illustrate a body 1 adapted for the first embodiment of the invention (illustrated inter alia in FIGS. 1 and 2).
[0230]FIG. 54 illustrates a magnetically influenced voltage converter device, where the device has an internal control core 24 consisting of an external tube 20 and an internal tube 21 which are concentric and made of a magnetisable material with a gap 22 between the external tube's 20 inner wall and the internal tube's 21 outer wall. Spacers 23 are mounted in the gap between the external tube's 20 inner wall and the internal tube's 21 outer wall. Magnetic field connectors 10, 11 are mounted between the tubes 20 and 21 at respective ends thereof. A combined control and magnetisation winding 4 is wound round the internal tube 21 and is located in the said gap 22. The device further consists of an external secondary core 25 with windings comprising a plurality of ring core coils 25′, 25″, 25″′ etc. placed on the outside of the control core 24. Each ring core coil 25′, 25″, 25″′ etc. consists of a ring of a magnetisable material wound round by a respective second main winding or secondary winding 3, only one of which is illustrated for the sake of clarity. A first main winding or primary winding 2 is passed through the internal tube 21 in the control core 24 and along the outside of the external cores 25 N1 number of times, where N1=1, . . . r.
[0232]FIG. 55 is a schematic illustration of a second embodiment of the magnetically influenced voltage regulator according to the invention with a first reluctance-controlled core 24 and a second core 25, each of which is composed of a magnetisable material and designed in the form of a closed, magnetic circuit, the said cores being juxtaposed. At least one first electrical conductor 8 is wound on to a main winding 2 about both the first and the second core's cross-sectional profile along at least a part of the said closed circuit. At least one second electrical conductor 9 is mounted as a winding 4 in the reluctance-controlled core 24 in a form which essentially corresponds to the closed circuit. In addition, at least one third electrical conductor 27 is wound round the second core's 25 cross-sectional profile along at least a part of the closed circuit. The field direction from the first conductor's 8 winding 2 and the second conductor's 9 winding is orthogonal. By means of this solution, the first conductor 8 and the third conductor 27 form a primary winding 2 and a secondary winding 3 respectively.
[0233]FIG. 56 illustrates a proposal for an electro-technical schematic symbol for the voltage connector according to the invention. FIG. 57 illustrates a proposal for a block schematic symbol for the voltage connector.
[0234]FIG. 58 illustrates a magnetic circuit where the control winding 4 and control flux B2 (H2) are not included.
[0238]FIG. 61 illustrates the use of the invention in an alternating current circuit in order to control the voltage over a load RL, which may be a light source, a heat source or other load.
[0239]FIG. 62 illustrates the use of the invention in a three-phase system where such a voltage connector in each phase, connected to a diode bridge, is used for a linear regulation of the output voltage from the diode bridge.
[0240]FIG. 63 illustrates a use as a variable choke in DC-DC converters.
[0241]FIG. 64 illustrates a use as a variable choke in a filter together with condensers. Here we have only illustrated a series and a parallel filter (64 a and 64 b respectively), but it is implicit that the variable inductance can be used in a number of filter topologies.
[0244]FIG. 55 illustrates how the fluxes in the invention travel in the cores. We wish to emphasise that the flux in the control core is connected to the flux in the working core via the windings enclosing both cores. In this system transformation of electrical energy will be able to be controlled by flux being connected to and disconnected from a control core and a working core. Since the fluxes between the cores are interconnected through Faraday's induction law, the functional dependence of the equations for the primary side and the equations for the secondary side will be controlled by the connection between the fluxes. In a linear application we will be able to control a transformation of voltages and currents between a primary winding and a secondary winding linearly by altering the reluctance in the control core, thus permitting us to introduce here the term reluctance-controlled transformer. For a switched embodiment we will be able to introduce the term reluctance-controlled switch.
The flux connection between the primary or first main winding 2 and the secondary winding or second main winding 3 will now be explained. Winding 2 which now encloses both the reluctance-controlled control core 24 and the main core 25 will establish flux in both-cores. The self-inductance L1 to 2 tells how much flux, or how many flux turns are produced in the cores when a current is passed in I1 in 2. The mutual inductance between the primary winding 2 and the secondary winding 3 indicates how many of the flux turns established by 2 and I1 are turned about 2 and about the secondary winding 3.
The flux lines will follow the path which gives the highest permanence (where the permeability is highest), i.e. with the least reluctance.
[0249]FIG. 65 illustrates a simplified reluctance model for the device according to the invention.
[0250]FIG. 65b illustrates a simplified electrical equivalent diagram for the connector according to the invention, where the reluctances are replaced by inductances.
Φ=Φk+Φ1 40)
Φ1=−Φ2 41)
On the basis of FIG. 65 we can formulate the highly simplified electrical equivalent diagram for the magnetic circuit illustrated in FIG. 65b.
[0259]FIG. 65b therefore illustrates the principle of the reluctance-controlled connector, where the inductance Lk absorbs the voltage from the primary side. L k = λ k I = NI 2 R mk 42 )
This inductance is controlled through the variable reluctance in the control core 24, with the result that the connection or the voltage division for a sinusoidal steady-state voltage applied to the primary winding will be approximately equal to the ratio between the inductance in the respective cores as illustrated in equation 43. e 2 e 1 = Lm L k + Lm 43 )
The magnetisation of the cores relative to applied voltage and frequency is so rated that. the main core 25 and the control core 24 can each separately absorb the entire time voltage integral without going into saturation. In our model the area of iron on the control and working cores is equal without this being considered as limiting for the invention.
Since the control core 24 is not in saturation on account of the main winding 2, we shall be able to reset the control core 24 independently of the working flux B1 (H1), thereby achieving the object by means of the invention of realising a magnetic switch. If necessary the main core 25 may be reset after an on pulse or a half on period by the necessary MMF being returned in the second half-period only in order to compensate-for any distortions in the magnetisation current.
When the switch is on, i.e. when the reluctance in the control core 24 is very low (μr=10−50) and approaching the reluctance of an air coil, we will have a very good flux connection between primary 2 and secondary 3 winding and transfer of energy.
[0269]FIG. 66 illustrates the connection for a magnetic switch. This may, of course, also act as an adjustable transformer.
[0270]FIGS. 67 and 67a illustrate an example of a three-phase design. All the other three-phase rectifier connectors are, of course, also feasible. By means of connection to a diode bridge or individual diodes to the respective outlets in a 12-pulse connector, an adjustable rectifier is obtained.
[0272]FIG. 67b illustrates the use of the device according to the invention as a connector in a frequency converter for converting input frequency to randomly selected output frequency and intended for operation of an asynchronous motor, for adding parts of the phase voltage generated from a 6 or 12-pulse transformer to each motor phase (FIG. 67b).
[0273]FIG. 68 illustrates the device used as a switch in a UFC (unrestricted frequency changer with forced commutation).
[0274]FIG. 69 illustrates a circuit comprising 6 devices 28-33 according to the invention. The devices 28-33 are employed as frequency converters where the period of the voltages generated is composed of parts of the fundamental frequency. This works by “letting through” only the positive half-periods or parts of the half-periods of a sinus voltage in order to make the positive new half-period in the new sinus voltage, and subsequently the negative half-periods or parts of the negative half-periods in order thereby to make the negative half-periods in the new sinus voltage. In this way a sinus voltage is generated with a frequency from 10% to 100% of the fundamental frequency. This converter also acts as a soft start since the voltage on the output is regulated via the reluctance control of the connection between the primary and the secondary winding.
[0276]FIG. 70 illustrates the use of the device according to the invention as a DC to AC converter. Here the main winding 2 in the connector is excited by a DC voltage U1 which establishes a field H1 (B1) both in the control core 24 and in the main core 25 (these are not shown in the figure). The number of turns N1, N2, N 3 and the area of iron are designed in such a manner that none of the cores are in saturation in steady state. In the event of a control signal (i.e. excitation of the control winding 4) into the control core 24, the flux B2 (H2) therein will be transferred to the main core 25 and a change in the flux B1 (H1) in this core 25 will induce a voltage in the secondary winding (main winding 3). By having a sinusoidal control current I2, a sinusoidal voltage will be able to be generated on the secondary side (main winding 3), with the same frequency as the control voltage U1.
[0277]FIG. 70b illustrates the use of the invention as a converter with a change of reluctance.
[0278]FIG. 71 illustrates a use of the device according to the invention as an AC-DC converter. The same control principle is used here as that explained above in the description of a frequency converter in FIG. 69. FIG. 71b illustrates a diagram of the time of the device's input and output voltage.
1. A magnetically influenced current or voltage regulator, characterized in that it comprises:
a body (1) which is composed of a magnetisable material and provides a closed, magnetic circuit,
at least one first electrical conductor (8) wound round the body (1) along at least a part of the closed circuit for at least one turn which forms a first main winding (2),
at least one second electrical conductor (9) wound around the body (1) along at least a part of the closed circuit for at least one turn which forms a second main winding or control winding (4),
where the winding axis (A2) for the turn or turns in the main winding (2) is at right angles to the winding axis (A4) for the turn or turns in the control winding (4) with the object of providing orthogonal magnetic fields (H1, B1 and H2, B2 respectively) in the body (1) and thereby controlling the behaviour of the magnetisable material relative to the field (H1, B1) in the main winding (2) by means of the field (H2, B2) in the control winding (4).
2. A device as indicated in claim 1, characterized in that
the axis (A2) for the turn(s) in the main winding (2) is parallel to or coincident with the body's (1) longitudinal direction (A1), while the turn(s) in the control winding (4) extend substantially along the magnetisable body (1), and the axis (A4) for the control winding (4) is therefore at right angles to the body's (1) longitudinal direction (A1).
3. A device as indicated in claim 1, characterized in that
the axis (A4) for the turn(s) in the control winding (4) is parallel to or coincident with the body's (1) longitudinal direction (A1), while the turn(s) in the main winding (2) extend substantially along the magnetisable body (1), and the axis (A2) for the main winding (2) is therefore at right angles to the body's (1) longitudinal direction (A1).
4. A device as indicated in one of the preceding claims, characterized in that it comprises one third electrical conductor (27) wound round the body (1) along at least a part of the closed circuit for at least one turn which forms a third main winding (3), where the winding axis (A3) for the turn or turns in the third main winding (3) coincides with or is parallel to the winding axis (A2) for the turn or turns in the first main winding (2), thus providing a transformer effect between the first and the third main windings (2 and 3 respectively) when at least one of them is excited.
5. A device as indicated in one of the claims 1-3, characterized in that it comprises one third electrical conductor (27) wound round the body (1) along at least a part of the closed circuit for at least one turn which forms a third main winding (3), where the winding axis (A3) for the turn or turns in the third main winding (3) coincides with or is parallel to the winding axis (A4) for the turn or turns in the, first control winding (4), thus providing a transformer effect between the third main winding and the control winding (3 and 4 respectively) when at least one of them is excited.
6. A magnetically influenced current or voltage regulator, characterized by
a first body (6) and a second body (7) each of which is composed of a magnetisable material which provides a magnetic circuit, the said bodies (6, 7) being juxtaposed,
at least one first electrical conductor (8) wound along at least a part of the closed circuit for at least one turn which forms a first main winding (2),
at least one second electrical conductor (9) wound around at least a part of the first and/or second body (6 and 7 respectively) for at least one turn which forms a second main winding or control winding (4′,4″),
7. A magnetically influenced current or voltage regulator, characterized by
a first body (6) and a second body (7) each of which is composed of a magnetisable material and a first magnetic field connector (10) and a second magnetic field connector (1) which together with the bodies (6, 7) provide a closed, magnetic circuit, the said bodies (6, 7) being juxtaposed,
at least one first electrical conductor (8) wound around at least a part of the first and/or the second body (6 and 7 respectively) for at least one turn which forms a first main winding (2),
at least one second electrical conductor (9) wound along at least a part of the closed circuit for at least one turn which forms a second main winding or control winding (4),
8. A device as indicated in claim 6 or 7, characterized in that it further comprises magnetic field connectors (10, 11) which together with the bodies form the magnetic circuit.
9. A device as indicated in claims 6, 7 or 8, characterized in that it comprises one third electrical conductor (27) wound for one turn which forms a third main winding (3), where the winding axis (A3) for the turn or turns in the third main winding (3) coincides with or is parallel to the winding axis (A2) for the turn or turns in the first main winding (2), thus providing a transformer effect between the first and the third main windings (2 and 3 respectively) when at least one of them is excited.
10. A device as indicated in one of the claims 6, 7 or 8, characterized in that it comprises one third electrical conductor (27) wound for at least one turn which forms a third main winding (3), where the winding axis (A3) for the turn or turns in the third main winding (3) coincides with or is parallel to the winding axis (A4) for the turn or turns in the control winding (4), thus providing a transformer effect between the third main winding and the control winding (3 and 4 respectively) when at least one of them is excited.
11. A device according to claims 6, 7, 8, 9 or 10, characterized in that the first and the second body (6 and 7 respectively) are tubular in shape, thus enabling the first conductor (8) or the second conductor (9) to extend through the first and the second body (6 and 7 respectively, claim 6 and claim 7 respectively), and the magnetic field connectors (10, 11) comprise apertures (12) for the conductors (8, 9).
12. A device according to claim 11, characterized in that the magnetic field connectors (10, 11) each comprise a gap (13) to facilitate the insertion of the first or the second conductor (8 and 9 respectively) and to interrupt the magnetic field path of the magnetic field H1 (B1) from the conductor (8 and 9 respectively).
13. A device according to claim 11, characterized in that it is equipped with an insulating film (15) placed between the end surfaces of the tubes (6, 7) and the magnetic field connectors (10, 11).
14. A device according to claim 11, characterized in that each tube (6, 7) comprises two or more core parts (16, 16′, 16″).
15. A device according to claim 14, characterized in that it comprises an insulating layer (17) arranged between the core parts (16, 16′, 16″).
16. A device according to one of the claims 6-15, characterized in that the tubes (6, 7) have circular, square, rectangular, triangular or hexagonal cross sections.
17. A magnetically influenced current or voltage regulator, characterized by
a first, external tubular body (20) and a second, internal tubular body (21) each of which is composed of a magnetisable material and provides a magnetic circuit, the said bodies (20, 21) being concentric relative to each other and thus having a common axis (A1)
at least one first electrical conductor (8) wound round the tubular bodies (20, 21) for at least one turn which forms a first main winding (2),
at least one second electrical conductor (9) provided in the gap (22) between the bodies (20, 21) and wound around the body's common axis (A1) for at least one turn which forms a second main winding or control winding (4),
where the winding axis (A2) for the turn or turns in the main winding (2) is at right angles to the winding axis (A4) for the turn or turns in the control winding (4) with the object of providing orthogonal magnetic fields (H1, B1 and H2, B2 respectively) in the body (1) and thereby controlling the behaviour of the magnetisable material relative to the field (H1, B 1) in the main winding (2) by means of the field (H2, B2) in the control winding (4).
18. A magnetically influenced current or voltage regulator, characterized by
a first, external tubular body (20) and a second, internal tubular body (21) each of which is composed of a magnetisable material together with a first magnetic field connector (10) and a second magnetic field connector (11) which together with the bodies (20, 21) provide a closed, magnetic circuit, the said bodies (20, 21) being concentric relative to each other and thus having a common axis (A1)
at least one first electrical conductor (8) provided in the gap (22) between the bodies (20, 21) and wound around the body's common axis (A1) for at least one turn which forms a first main winding (2),
at least one second electrical conductor (9) wound round the tubular bodies (20, 21) for at least one turn which forms a second main winding or control winding (4),
19. A device according to claims 17 or 18, characterized in that it comprises a first magnetic field connector (10) and a second magnetic field connector (11) which together with the bodies (20, 21) provide a closed magnetic circuit.
20. A device according to claim 17, 18 or 19, characterized in that it comprises one third electrical conductor (27) wound for one turn which forms a third main winding (3), where the winding axis (A3) for the turn or turns in the third main winding (3) coincides with or is parallel to the winding axis (A2) for the turn or turns in the first main winding (2), thus providing a transformer effect between the first and the third main windings (2 and 3 respectively) when at least one of them is excited.
21. A device according to claim 17, 18 or 19, characterized in that it comprises one third electrical conductor (27) wound for at least one turn which forms a third main winding (3), where the winding axis (A3) for the turn or turns in the third main winding (3) coincides with or is parallel to the winding axis (A4) for the turn or turns in the control winding (4), thus providing a transformer effect between the third main winding and the control winding (3 and 4 respectively) when at least one of them is excited.
22. A magnetically influenced current or voltage regulator, characterized by
a first, external tubular body (20) and a second, internal tubular body (21) each of which is composed of a magnetisable material which provides a closed magnetic circuit or internal core (24),
an additional tubular body which provides an external core (25) which is mounted on the outside of the first, external tubular body (20), where the bodies (20, 21, 25) are concentric relative to each other and thus have a common axis (A1)
at least one first electrical conductor (8) wound round the tubular bodies (20, 21, 25) for at least one turn which forms a first main winding (2),
at least one second electrical conductor (9) mounted in the gap (22) between the first (20) and the second body (21) and wound around the bodies' common axis (A1) for at least one turn which forms a second main winding or control winding (4), p1 where the winding axis (A2) for the turn or turns in the main winding (2) is at right angles to the winding axis (A4) for the turn or turns in the control winding (4) with the object of providing orthogonal magnetic fields (H1, B1 and H2, B2 respectively) in the body (1) and thereby controlling the behaviour of the magnetisable material relative to the field (H1, B1) in the main winding (2) by means of the field (H2, B2) in the control winding (4).
23. A magnetically influenced current or voltage regulator, characterized by
a first, external tubular body (20) and a second, internal tubular body (21) each of which is composed of a magnetisable material which forms a closed, magnetic circuit or internal core (24),
at least one first electrical conductor (8) mounted in the gap (22) between the first (20) and the second body (21) and wound round the bodies' common axis (A1) for at least one turn which forms a second main winding or control winding (4),
at least one second electrical conductor (9) wound around the tubular bodies (20, 21) for at least one turn which forms a second main winding or control winding (4),
24. A device according to claim 22 or 23, characterized in that it comprises a first magnetic field connector (10) and a second magnetic field connector (11) which together with the bodies (20, 21) provide the closed magnetic circuit.
25. A device according to claim 22, 23 or 24, characterized in that it comprises one third electrical conductor (27) wound around the external core (25) for one turn which forms a third main winding (3), where the winding axis (A3) for the turn or turns in the third main winding (3) coincides with or is parallel to the winding axis (A2) for the turn or turns in the first main winding (2), thus providing a transformer effect between the first and the third main windings (2 and 3 respectively) when at least one of them is excited.
26. A device according to claim 22, 23 or 24, characterized in that it comprises one third electrical conductor (27) wound around the external core (25) for at least one turn which forms a third main winding (3), where the winding axis (A3) for the turn or turns in the third main winding (3) coincides with or is parallel to the winding axis (A4) for the turn or turns in the control winding (4), thus providing a transformer effect between the third main winding and the control winding (3 and 4 respectively) when at least one of them is excited.
27. A device according to one of the claims 22-26, characterized in that the external core (25) consists of several annular parts (25′, 25″, etc.) and that the first and/or the third main winding (2 and 3 respectively) form individual windings around each annular part.
28. A device according to one of the claims 22-26, characterized in that the external core (25) consists of several annular parts (25′, 25″, etc.) and that the control winding and/or the third main winding (4 and 3 respectively) form individual windings around each annular part.
29. The use of a device as indicated in one or more of the preceding claims 1-28 as a component in a frequency converter for converting input frequency to randomly selected output frequency (FIG. 69), preferably intended for operation of an asynchronous motor in a cycloconverter connection.
30. The use of a device as indicated in one or more of the preceding claims 1-28 as a connector in a frequency converter for converting input frequency to randomly selected output frequency and intended for operation of an asynchronous motor, for summation of parts of the phase voltage generated from a 6 or 12-pulse transformer to each motor phase (FIG. 67b).
31. The use of a device as indicated in one or more of the preceding claims 1-28 as a DC to AC converter which converts DC voltage/current to an AC voltage/current of a randomly selected output frequency, where the stored magnetic energy in a DC-fed first main winding (2) or primary winding's (2) inductance (L1) is varied by means of the orthogonal control field (B2, H2) which influences the inductance, thereby generating an AC voltage in the third main winding (3) or secondary winding in the voltage connector with frequency equal to the frequency of the flux variation/inductance variation (FIG. 70).
32. The use according to claim 31 where three such variable inductance voltage converters are interconnected in order to generate a three-phase voltage with randomly selected output frequency which is connected to the said asynchronous machine.
33. The use of a device as indicated in one or more of claims 1-28 for converting AC voltage to DC voltage within the processing industry, where the device is used as a reluctance-controlled variable transformer where the output voltage is proportional to the reluctance alteration in a core which is magnetically connected in parallel or in series to an external or internal core with a separate secondary winding, and where three or more such reluctance-controlled transformers are connected to the known three-phase rectifier connections for 6 or 12-pulse rectifier connections for diode output stage (FIGS. 62 and 71 respectively).
34. The use of a device as indicated in one or more of claims 1-28 for use in rectifiers for converting AC voltage to DC voltage for use within the processing industry, where the device forms voltage connectors which are used as variable inductances in series with the primary windings on known transformer connections, and where three or more such transformers are connected to three-phase rectifier connections for 6 or 12-pulse rectifier connections for diode output stage (FIG. 62).
35. The use of the device as indicated in one or more of the preceding claims 1-28 for AC/DC or DC/AC converters for use in the field of switched power supply, for reduction of the size of the magnetic voltage converter, since the device forms a reluctance-controlled variable transformer where the output voltage is proportional to the reluctance change in a core which is magnetically connected in parallel or in series to an external or internal core with a separate secondary winding (FIGS. 56, 63).
36. The use as indicated in claim 36, characterized in that filters in which inductance forms a part are provided with a variable inductance (FIG. 63).
37. The use of a device as indicated in one or more of the preceding claims 1-28 as a component in an adjustable voltage compensator in the high-voltage distributor network, where the device creates linear variable inductance (FIG. 72).
38. The use of a device as indicated in one or more of the preceding claims 1-28 as a component in an adjustable reactive power compensator (VAR compensator), where the device creates linear variable inductance in connection with known filter circuits where at least one condenser is also included as an element, the device in the form of a reluctance-controlled transformer being employed as an element in a compensator connection where capacitance or inductance are automatically coupled in and adjusted to the extent required to compensate for the reactive power (FIGS. 64 and 64b).
39. The use of a device as indicated in one or more of the preceding claims 1-28 in a system for reluctance-controlled direct conversion of an AC voltage to a DC voltage (FIGS. 71 and 71a).
40. The use of a device as indicated in one or more of the preceding claims 1-28 in a system for reluctance-controlled direction conversion of a DC voltage to an AC voltage (FIGS. 70 and 70a).
US10278908 2000-05-24 2002-10-24 Magnetically influenced current or voltage regulator and a magnetically influenced converter Expired - Fee Related US6933822B2 (en)
NO20002652 2000-05-24
PCT/NO2001/000217 WO2001090835A1 (en) 2000-05-24 2001-05-23 Magnetic controlled current or voltage regulator and transformer
US33056201 true 2001-10-25 2001-10-25
US10278908 US6933822B2 (en) 2000-05-24 2002-10-24 Magnetically influenced current or voltage regulator and a magnetically influenced converter
US10685345 US7026905B2 (en) 2000-05-24 2003-10-14 Magnetically controlled inductive device
US11033483 US7193495B2 (en) 2000-05-24 2005-01-11 Magnetically influenced current or voltage regulator and a magnetically influenced converter
US11347483 US7256678B2 (en) 2000-05-24 2006-02-03 Magnetically controlled inductive device
PCT/NO2001/000217 Continuation WO2001090835A1 (en) 2000-05-24 2001-05-23 Magnetic controlled current or voltage regulator and transformer
US10685345 Continuation-In-Part US7026905B2 (en) 2000-05-24 2003-10-14 Magnetically controlled inductive device
US20030076202A1 true true US20030076202A1 (en) 2003-04-24
US6933822B2 US6933822B2 (en) 2005-08-23
ID=27353355
US10278908 Expired - Fee Related US6933822B2 (en) 2000-05-24 2002-10-24 Magnetically influenced current or voltage regulator and a magnetically influenced converter
US11033483 Active US7193495B2 (en) 2000-05-24 2005-01-11 Magnetically influenced current or voltage regulator and a magnetically influenced converter
US (2) US6933822B2 (en)
US20060152448A1 (en) * 2005-01-10 2006-07-13 Samsung Sdi Co., Ltd. Apparatus for deriving a plasma display panel
WO2008138623A1 (en) * 2007-05-15 2008-11-20 Philippe Saint Ger Ag Method for influencing the magnetic coupling between two bodies at a distance from each other and device for performing the method
US20110050004A1 (en) * 2008-04-11 2011-03-03 Magtech As Power transmission system
FR2972865A1 (en) * 2011-03-18 2012-09-21 Electricite De France Regulator series voltage has protected electronic short circuits by a magnetic circuit by decoupling holes and windows
US20150141736A1 (en) * 2013-11-18 2015-05-21 National Synchrotron Radiation Research Center Generating apparatus of a pulsed magnetic field
WO2016186624A1 (en) * 2015-05-15 2016-11-24 Halliburton Energy Services Inc. Geometrically configurable multi-core inductor and methods for tools having particular space constraints
WO2017095890A1 (en) * 2015-11-30 2017-06-08 Eagle Harbor Technologies, Inc. High voltage transformer
WO1999019962B1 (en) * 1997-10-16 1999-05-27 Steven L Sullivan Generators and transformers with toroidally wound stator winding
DE19855709B4 (en) * 1998-12-03 2008-01-24 Helmut Hechinger Gmbh & Co. Guide rods for a jacquard weaving means
US7733204B2 (en) * 2006-06-29 2010-06-08 Intel Corporation Configurable multiphase coupled magnetic structure
CA2678606A1 (en) * 2007-02-20 2008-08-28 Hexaformer Ab A reactor core
CN101978569B (en) * 2008-03-17 2014-08-27 韦特柯格雷斯堪的纳维亚有限公司 Arrangement related to offshore cable system
US20130009737A1 (en) * 2009-12-18 2013-01-10 Svend Erik Rocke Transformer
EP2535783A1 (en) 2011-06-16 2012-12-19 Vetco Gray Scandinavia AS Transformer
US2333015A (en) * 1939-11-28 1943-10-26 Gen Electric Variable reactance device
US2716736A (en) * 1949-12-08 1955-08-30 Harold B Rex Saturable reactor
US3409822A (en) * 1965-12-14 1968-11-05 Wanlass Electric Company Voltage regulator
US3757201A (en) * 1972-05-19 1973-09-04 L Cornwell Electric power controlling or regulating system
US4163189A (en) * 1976-06-04 1979-07-31 Siemens Aktiengesellschaft Transformer with a ferromagnetic core for d-c and a-c signals
US5936503A (en) * 1997-02-14 1999-08-10 Asea Brown Boveri Ab Controllable inductor
US2232105A (en) 1936-06-04 1941-02-18 Twin Coach Co Vehicle driving construction and arrangement
FR2344109A1 (en) 1976-03-08 1977-10-07 Ungari Serge Transformer with laminated cylindrical core - has central core carrying windings and encircled by laminated outer core
EP0018296B1 (en) 1979-04-23 1984-04-25 Serge Ungari Coil or trellis utilisable in variable transformers, adjustable power or precision resistors, coding resistors, wound resistors, electric radiators and heat exchangers
JPS6423105A (en) 1987-07-17 1989-01-25 Japan Aviation Electron Film thickness evaluating device
JPH01231305A (en) 1988-03-11 1989-09-14 Hitachi Ltd Foil-wound transformer
WO1994011891A1 (en) 1992-11-09 1994-05-26 Asea Brown Boveri Ab Controllable inductor
JP2866797B2 (en) 1993-12-28 1999-03-08 日立フェライト電子株式会社 Isdn pulse transformer
JPH07201587A (en) 1993-12-28 1995-08-04 Hitachi Ferrite Denshi Kk Pulse transformer for isdn
JP2866793B2 (en) 1993-12-28 1999-03-08 日立フェライト電子株式会社 Isdn pulse transformer
US5672967A (en) 1995-09-19 1997-09-30 Southwest Research Institute Compact tri-axial fluxgate magnetometer and housing with unitary orthogonal sensor substrate
WO1997034210A1 (en) 1996-03-15 1997-09-18 Abb Research Ltd. Controllable reactor with feedback control winding
EP0900444B1 (en) 1996-05-23 2003-07-09 Abb Ab A controllable inductor
RU2125310C1 (en) 1996-06-18 1999-01-20 Сюксин Эспер Аркадьевич High-frequency transformer
DE69718516D1 (en) 1997-01-08 2003-02-20 Abb Ab Vaesteraas controllable inductor
GB0008150D0 (en) 2000-04-03 2000-05-24 Abb Ab Core of a high voltage induction device
DE10062091C1 (en) 2000-12-13 2002-07-11 Urs Graubner Inductive component for power or communications applications has 2 complementary shell cores with ferromagnetic wire sections in ring around core axis
WO2002059918A8 (en) 2001-01-23 2002-11-07 Harrie R Buswell Wire core inductive devices having a flux coupling structure and methods of making the same
US8558416B2 (en) * 2008-04-11 2013-10-15 Magtech As Power transmission system
WO2012126884A3 (en) * 2011-03-18 2013-07-25 Electricite De France Series voltage regulator with electronics protected against short-circuits by magnetic circuit-based decoupling using holes and windows
US9245675B2 (en) * 2013-11-18 2016-01-26 National Synchrotron Radiation Research Center Generating apparatus of a pulsed magnetic field
US20050190585A1 (en) 2005-09-01 application
US7193495B2 (en) 2007-03-20 grant
US6933822B2 (en) 2005-08-23 grant
Urling et al. 1989 Characterizing high-frequency effects in transformer windings-a guide to several significant articles
US7193825B2 (en) 2007-03-20 Superconducting fault current limiter
US4344126A (en) 1982-08-10 Low ripple D.C. power supply
Yildirim et al. 2000 Measured transformer derating and comparison with harmonic loss factor (F/sub HL/) approach
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