ELECTRIC POWER GENERATOR

In order to create an efficient electric power generator that suppresses cogging, reduces leakage of magnetic flux density, and regulates magnetic flux density orientation, an electricity generating coil with a ferromagnetic body core is used. A magnetic body core is sandwiched between the first magnetic bodies. First magnets are fixed to both sides of the electricity-generating coil by second magnetic bodies and first non-magnetic body spacers. This ensures a fixed space between the first magnets and the first magnetic bodies. On one side of the second magnetic body, a pair of first magnets is fixed to both ends. When a rotating portion is rotated, the opposing first magnets and the electricity generating coil are aligned on a straight line, and the magnetic flux density orientation lies in one direction through the second magnetic body, including the opposing first magnets.

TECHNICAL FIELD

The present invention relates to a generator using a power generation coil having a magnetic core, and relates particularly to a magnet generator that suppresses cogging, reduces leakage of magnetic flux density, and regulates a direction of the magnetic flux density.

BACKGROUND ART

Many generators have been put into practical use in which a coreless coil is sandwiched between magnets and magnetic bodies for suppressing cogging each of which maintains a constant distance (for example, see PTL 1).

CITATION LIST

Patent Literature

SUMMARY OF INVENTION

Technical Problem

In the above generator, there are problems in that it is not possible to use a power generation coil including a magnetic core, and it is not possible to set a distance between the magnets and the magnetic bodies for suppressing cogging closer than a thickness of the coil.

An object of the present invention is to provide an efficient generator using a power generation coil including a magnetic core and being capable of reducing a distance between magnet and magnetic bodies for suppressing cogging regardless of the thickness of the coil.

Solution to Problem

A generator for solving the problems relating to the present invention includes a base, a pair of first magnetic bodies fixed to the base, a rotation shaft rotationally fixed to the pair of first magnetic bodies, an even number of power generation coils having power generation coil cores sandwiched at the same intervals on the same circumference around the rotation shaft by the pair of first magnetic bodies to be in contact with and fixed by the pair of first magnetic bodies, on a side of each of the pair of first magnetic bodies opposite to the even number of power generation coils, first non-magnetic body spacers each fixed to the rotation shaft while maintaining a constant space from each of the pair of first magnetic bodies, second magnetic bodies fixed to each of the first non-magnetic body spacers, and at both ends of each of the second magnetic bodies on one side on a side of the even number of power generation coils, first magnets fixed at a position facing each of the even number of power generation coils being interposed therebetween, on the same circumference, at the same intervals, as the power generation coil around the rotation shaft, while maintaining a constant space from the first magnetic body, in which the first magnetic body is arranged between the power generation coil and the first magnets, the first magnets are arranged at both ends of the second magnetic body, and when the first magnets facing each other are aligned on a single straight line with the power generation coil due to a rotational movement, the first magnets including the first magnets facing each other are arranged so that a direction of magnetic flux density is unidirectional through the second magnetic bodies.

The invention-based generator based on another embodiment, in accordance with the generator according to claim1, in which a second non-magnetic body spacer fixed to the rotation shaft between the first magnetic body and the first magnets, second magnets facing the first magnets, the second magnets being fixed to the second non-magnetic body spacer so as to maintain a constant space from the first magnetic body, and a set of the power generation coils and the pair of first magnetic bodies, each fixed to the base so as to maintain a constant space between the first magnets and the second magnets being adjacent are added to the generator according to claim1once or a plurality of number of times, and when the first magnets and the second magnets facing each other are aligned on a single straight line with the even number of power generation coils due to a rotational movement, the first magnets and the second magnets are arranged so that directions of magnetic flux density are unidirectional through the second magnetic bodies in all the first magnets and the second magnets facing each other.

The invention-based generator is characterized in that regardless of the first magnets and the second magnets, a distance between the magnets closest in a lengthwise direction of the rotation shaft is configured to be shorter than a distance between the magnets closest in a diametrical direction of the rotation shaft.

The invention-based generator is characterized in that a part or all of the first magnets and the second magnets are electromagnets.

Advantageous Effects of Invention

In the present invention, when the magnetic bodies are arranged between the power generation coil and the magnet to suppress cogging, it is possible to facilitate the use of the power generation coil with a magnetic core, when an end of the magnet on the side opposite to the power generation coil is connected with a magnetic body, it is possible to reduce leakage of magnetic flux density, and when the direction of the magnetic flux density is set unidirectional, it is possible to increase the power generation efficiency.

andFIG.26is a perspective view illustrating an arrangement relationship according to the second embodiment.

DESCRIPTION OF EMBODIMENTS

To carry out the present invention, description will be provided with reference to the drawings.

A direction will be defined and described based onFIG.25.

First Embodiment

FIG.7is a left side view according to a first embodiment of the present invention,FIG.1is a cross-sectional view taken along A-A ofFIG.7,FIG.10illustrates a power generation coil unit25,FIG.11is a left side view of a fixation unit22of the first embodiment of the present invention, andFIG.12is a front view of the fixation unit22of the first embodiment of the present invention.

As illustrated inFIGS.1,10,11, and12, at the same intervals on the same circumference around a hole2athrough which a rotation shaft passes, both ends of a magnetic core3aare fixed in contact with a first magnetic body2.
A power generation coil unit25including a power generation coil3and the first magnetic body2is fixed to a base4.
In fixing the magnetic core3ato the first magnetic body2with a screw or the like, a material exhibiting the magnetic property equivalent to that of the magnetic core3ais preferably used.

FIG.4is a front view according to the first embodiment of the present invention,FIG.8is a left side view of a rotation unit21of the first embodiment of the present invention, andFIG.9is a front view of the rotation unit21of the first embodiment of the present invention.

As illustrated inFIGS.4,8,9, and11, the first magnet5is fixed to the rotation shaft1via a first non-magnetic body spacer7and a second magnetic body6so as to maintain a constant space from the first magnetic body2, at the same intervals on the same circumference as the power generation coil3around the rotation shaft1, at a position facing the power generation coil3being interposed therebetween.
In fixing the first magnet5to the second magnetic body6with a screw or the like, a material exhibiting the magnetic property equivalent to that of the second magnetic body6is preferably used.

FIGS.5and6are a conceptual diagram illustrating the direction of magnetic flux density according to the first embodiment of the present invention.

When the first magnet5and the power generation coil3are aligned on a single straight line due to a rotational movement of the rotation unit21of the first embodiment, the first magnet5is arranged so that the direction of the magnetic flux density are unidirectional, as illustrated inFIGS.5and6.
As long as the magnetic flux density is unidirectional, the direction of an arrow13may be reversed.

FIG.25is a perspective view illustrating an arrangement relationship according to the first embodiment of the present invention.

As illustrated inFIG.1, a first bearing8, a second bearing9, and a retaining ring10are used to rotationally fix the rotation unit21of the first embodiment to a fixation unit22of the first embodiment.
Up to this point, the rotation unit21of the first embodiment and the fixation unit22of the first embodiment are described separately, but when the rotation unit21of the first embodiment is already assembled, it is not possible to assemble the rotation unit21to the fixation unit22of the first embodiment.
The assembly proceeds with reference toFIG.25.

In the first embodiment of the present invention, the shape, quantity, and the like of each component may be changed within the technical scope of the present invention.

Second Embodiment

FIG.20is a left side view according to a second embodiment of the present invention,FIG.19is a cross-sectional view taken along B-B ofFIG.20,FIG.22is a left side view of a fixation unit24of the second embodiment of the present invention, andFIG.23is a front view of the fixation unit24of the second embodiment of the present invention.

As illustrated inFIGS.19,22, and23, two sets of power generation coil unit25, which are exactly the same as those in the first embodiment, are fixed to the base4.

FIG.18is a front view according to the second embodiment of the present invention,FIG.13is a left side view of a rotation unit23of the second embodiment of the present invention,FIG.14is a front view of the rotation unit23of the second embodiment of the present invention, andFIG.15is a front view of a second magnet unit26.

As illustrated inFIGS.18,13,14, and15, the first non-magnetic body spacer7, the second magnetic body6, and the first magnet5are fixed to the rotation shaft1in the same manner as in the first embodiment.
The second magnet12is fixed to the second non-magnetic body spacer11so as to face the first magnet5, on the same circumference, at the same intervals, as the power generation coil3around the rotation shaft1.
The second magnet unit26including the second non-magnetic body spacer11and the second magnet unit12is fixed to the rotation shaft1between two first non-magnetic body spacers7, as illustrated inFIG.14.

FIGS.17and21are a conceptual diagram illustrating the direction of magnetic flux density according to the second embodiment of the present invention.

When the first magnet5, the second magnet12, and the power generation coil3are aligned on a single straight line due to a rotational movement of the rotation unit23of the second embodiment, the first magnet5and the second magnet12are arranged so that the direction of the magnetic flux density is unidirectional, as illustrated inFIGS.17and21.
As long as the magnetic flux density is unidirectional, the direction of the arrow13may be reversed.

FIG.26is a perspective view illustrating an arrangement relationship according to the second embodiment of the present invention.

As illustrated inFIG.19, the first bearing8, the second bearing9, and the retaining ring10are used to rotationally fix the rotation unit23of the second embodiment to the fixation unit24of the second embodiment.
Up to this point, the rotation unit23of the second embodiment and the fixation unit24of the second embodiment are described separately, but when the rotation unit23of the second embodiment is already assembled, it is not possible to assemble the rotation unit23to the fixation unit24of the second embodiment.
The assembly proceeds with reference toFIG.24.

In the second embodiment of the present invention, the shape and the quantity of each component may be changed within the technical scope of the present invention.

Third Embodiment

FIG.24illustrates a third embodiment in which the power generation coil unit25and the second magnet unit26are added three times to the first embodiment.

In order to cause a large amount of magnetic flux density to flow through a magnetic core3a, regardless of the first magnet5and the second magnet12, a distance between the magnets closest in a lengthwise direction of the rotation shaft is more preferably configured to be shorter than a distance between the magnets closest in a diametrical direction of the rotation shaft1.

Although it is preferable to use a ferromagnetic material for the first magnetic body2in order to absorb a large amount of magnetic force, in order to facilitate a flow of magnetic flux density through the power generation coil3, it is preferable that a magnetic material stronger than the first magnetic body2is employed for a material of the magnetic core3a.

In general, a coil provided with a magnetic core generates more power than a coreless coil, but a magnetic attraction force acts between the magnetic core and the magnet, causing large cogging.

In the present invention, in order to suppress such cogging, it is possible to suppress the cogging by placing a magnetic body between the coil and the magnet, when an end of the magnet opposite to the power generation coil is connected with a magnetic body, it is possible to reduce leakage of magnetic flux density, and when the direction of the magnetic flux density is set unidirectional, it is possible to enhance the power generation efficiency.

REFERENCE SIGNS LIST

1Rotation shaft2First magnetic body2aHole through which rotation shaft passes3Power generation coil3aMagnetic body core4Base5First magnet6Second magnetic body7First non-magnetic body spacer7aHole through which rotation shaft passes8First bearing9Second bearing10Retaining ring11Second non-magnetic body spacer11aHole through which rotation shaft passes11bHole through which second magnet passes12Second magnet13Arrow indicating direction of magnetic flux density21Rotation unit of first embodiment22Fixation unit of first embodiment23Rotation unit of second embodiment24Fixation unit of second embodiment25Power generation coil unit26Second magnet unit31First embodiment32Second embodiment33Third embodiment