Source: https://patents.google.com/patent/JP2008130964A/en
Timestamp: 2020-01-24 18:40:38
Document Index: 86885068

Matched Legal Cases: ['art 51', 'art 71', 'art 50', 'art 50', 'art, 13', 'art, 50', 'art, 51', 'art, 60', 'art, 72', 'art, 73', 'art, 75']

JP2008130964A - Gap construction of reactor - Google Patents
Gap construction of reactor Download PDF
JP2008130964A
JP2008130964A JP2006316888A JP2006316888A JP2008130964A JP 2008130964 A JP2008130964 A JP 2008130964A JP 2006316888 A JP2006316888 A JP 2006316888A JP 2006316888 A JP2006316888 A JP 2006316888A JP 2008130964 A JP2008130964 A JP 2008130964A
JP2006316888A
Sei Urano
聖 浦野
浩太郎 鈴木
2006-11-24 Application filed by Tamura Seisakusho Co Ltd, 株式会社タムラ製作所 filed Critical Tamura Seisakusho Co Ltd
2006-11-24 Priority to JP2006316888A priority Critical patent/JP2008130964A/en
2008-06-05 Publication of JP2008130964A publication Critical patent/JP2008130964A/en
PROBLEM TO BE SOLVED: To reduce noise caused by a suction force acting between core members of a reactor.
SOLUTION: A magnetic core 20 in a reactor 10 is composed of a first core member 30 constituting a winding portion around which a winding 21 is wound, and a non-winding portion where a winding is not wound. The two core members 40 are configured such that these core members are coupled via the gap portion 50. The first core member is formed of a rod-like body having a circular cross section, an elliptical shape, or a polygonal shape. A 2nd core member is formed so that the edge part of a 1st core member may be covered. The surface on which the suction force acts between the first and second core members is formed by a curved surface or a plurality of flat surfaces, and the flexible resin material 60 is filled in the gap formed between the core members. .
The present invention relates to a reactor used in, for example, a booster circuit, an inverter circuit, an active filter circuit, and the like, and more particularly to a reactor gap structure having a plurality of magnetic gaps in a magnetic core.
Generally, a reactor is used for a booster circuit, an inverter circuit, an active filter circuit, and the like, and includes a winding and a magnetic core, and the winding is wound around the core to form a coil. The inductance is obtained.
As a reactor of this type, in recent years, it has a first core member that constitutes a winding portion around which a winding is wound, and a second core member that constitutes a non-winding portion where the winding is not wound, A structure in which the first core member and the second core member are coupled to each other via a gap has been increasingly used.
For example, this type of reactor includes a leg iron core that forms an elongated core, a coil wound around the leg iron core, and a yoke iron core that is disposed at both ends of the leg iron core via gap members. This reactor is generally ring-shaped as a whole so that predetermined electrical characteristics such as inductance can be obtained by a coil wound around the leg iron core among the leg iron core and the yoke iron core, which are cores made of a magnetic material. It has become.
JP2003-1224039
The above-described conventional reactor has a core structure in which a magnetic attractive force acting between the leg iron core and the yoke iron core works between the planes. That is, in the above-described reactor, the magnetic attractive force acting between the leg iron core and the yoke iron core, which is a magnetic body, due to the magnetic flux generated when a current flows through the coil, the end surface of the leg iron core and this via the gap member In this case, in the core configured in a substantially ring shape, the magnetic flux has a habit of passing through the inner portion of the ring shape, so that the magnetic flux flows away from the above surface. It will be. As a result, the magnetic attractive force acting between the leg iron core and the yoke iron core constituting the ring-shaped core is also concentrated on this inner portion, and when the current flows and operates as a reactor, the location of the magnetic cap portion In this case, there is a problem that noise is generated due to vibration.
This invention is made | formed in view of such a situation, and it aims at obtaining the gap structure of a reactor which can reduce the noise resulting from the attraction | suction force which acts between the core members of a reactor.
In order to meet such an object, the reactor gap structure according to the present invention (the invention according to claim 1) includes at least a winding and a magnetic core, and the core is wound around which the winding is wound. A first core member that constitutes a portion and a second core member that constitutes a non-winding portion in which the winding is not wound, and the first core member and the second core member are interposed via a gap. The first core member is formed as a rod-like body having a circular, elliptical, or polygonal cross section, and the second core member is the first core member. The surface on which the suction force acts between the first core member and the second core member is formed by a curved surface or a plurality of planes, and the first core member and the first core member Softness in the gap formed between the two core members Characterized in that filled with fat materials.
The reactor gap structure according to the present invention (the invention according to claim 2) is the reactor gap structure according to claim 1, wherein the second core member has an end portion of the first core member in a fitted state. The gap portion is formed between a peripheral surface of the fitting concave portion and an outer peripheral surface of the end portion of the first core member.
The reactor gap structure according to the present invention (the invention according to claim 3) is the resin gap structure according to claim 1 or 2, wherein the reactor gap structure is made of a resin having a cylindrical portion facing the gap portion in a fitted state. The cylindrical portion includes a thin portion and a bulge formed on the outer periphery of the thin portion, and is substantially in contact with the surfaces of the first core member and the second core member during assembly. It has an output support part and a plurality of holes formed in the thin part.
The reactor gap structure according to the present invention (the invention according to claim 4) is the reactor gap structure according to claim 3, wherein the bulging support portion of the tubular portion is positioned at least downward when the reactor is assembled. The first core member is formed to be supported at three points with respect to the second core member at one point and at least two points in the upper half.
As described above, according to the reactor gap structure of the present invention (the invention described in claim 1), the attractive force acting by the magnetic flux between the first core member and the second core member of the reactor is curved. Or since it has a core structure that disperses in a plurality of directions by a plurality of planes, it can prevent concentration of suction force and reduce noise caused by this, and a flexible resin in the gap portion between the core members. Since the material is filled, vibrations generated between the core members during operation can be reliably absorbed, and noise can be reduced more reliably.
In addition, according to the present invention (the invention described in claim 2), the above-described noise reduction effect can be obtained, and the thermal conductivity from the first core member to the second core member is increased. There is also an advantage that it can be expected to improve the heat dissipation between the two.
According to the present invention (the invention described in claim 3), by using the resin spacer having the cylindrical portion facing the gap portion in a fitted state, the gap in the gap portion can be held in a required state and the softness is provided. The resin material filling operation can be performed easily and reliably, and the noise reduction effect of the soft resin material can be surely exhibited.
In particular, the bulging support portion can exhibit an effect in supporting the first core member while maintaining a predetermined positional relationship with respect to the second core member, and bulges when the soft resin material is filled. The space between the support portions functions as a resin reservoir, and an effect in performing reliable filling can be expected.
According to the present invention (the invention according to claim 4), the positional relationship between the first core member and the second core member can be reliably maintained by the bulging support portion even in the assembled state of the reactor. Therefore, the function and effect of the above-described third aspect can be exhibited.
1 to 4 show an embodiment of a reactor gap structure according to the present invention. In these figures, a reactor generally indicated by reference numeral 10 is, for example, an electric circuit of equipment having forced cooling means. A reactor part that is used and wound with a winding 21 around a core 20 to be described later to form a coil 22 is housed in a thermally conductive case 11 made of aluminum or the like that is almost box-shaped as a whole, and then filled in the case 1 It can be assembled in a state where the whole is fixed by pouring the material.
The winding 21 is wound around the core 23 by being wound around the cylindrical body 23 which is a non-magnetic material, and a first core member 30 described later is inserted into the cylindrical body 23. It has become.
In addition, the lead portion 12 is formed, for example, by peeling off the coating of the winding 21 and exposing the conductor, and is provided with a crimp terminal (not shown) so as to be connected to other electrical components or the like. It has become. Furthermore, the reactor fixing holes 13 at the four corners of the heat conductive case 11 are screw holes for fixing the heat conductive case 11 to, for example, a forcedly cooled housing.
The core 20 includes a first core member 30 that constitutes a winding portion around which the winding 21 is wound, and a second core member 40 that constitutes a non-winding portion where the winding 21 is not wound. Thus, the first core member 30 and the second core member 40 are coupled to each other through a gap portion 50.
That is, the first core member 30 is formed of a magnetic body as a rod-shaped body having a circular cross section, and is constituted by two parallel bar-shaped bodies. Further, the second core member 40 is formed so as to be disposed on both ends of the first core members 30, 30 so as to straddle between the first core members 30, 30. As a result, a ring-shaped core is formed as a whole. In these second core members 40, 40, fitting concave portions 41, 41 are formed so that the end portions of the first core members 30, 30 face in a state of being fitted, whereby the first core members 30, 30 are formed. The second core members 40 and 40 are configured to cover the ends of the first core member 40 and the second core member 40.
Here, the gap portion 50 is formed between the peripheral surface of the fitting recess 41 of the second core member 40 and the outer peripheral surface of the end portion of the first core member 30.
In the present embodiment, the first core member 30 is divided into a plurality of parts in the longitudinal direction, and the gap part 51 is formed in the divided part. However, the present invention is not limited to this.
Now, according to the present invention, in the reactor 10 having the above-described configuration, the gap portion 50 formed between the first core member 30 and the second core member 40 has a soft resin material such as urethane, for example. By filling 60, a vibration absorbing portion is formed, thereby suppressing or absorbing vibration generated between the core members 30 and 40 during operation of the reactor 10, and reducing noise caused thereby. .
More specifically, as shown in FIGS. 1 to 4, the reactor 10 includes a resin spacer member 70 such as PPS having a cylindrical portion 71 facing the gap portion 50 in a fitted state. As shown in FIGS. 2 and 3, the cylindrical portion 71 is formed to bulge to the outer periphery of the thin portion 72 and the thin portion 72, and the first core member 30, Bulging support portions 73 and 74 that are substantially in contact with the surface of the core member 40 and a plurality of hole portions 75 formed in the thin portion 72. The hole portion 75 is formed within a range in which the strength of the cylindrical portion 71 can be ensured, and also has an effect of obtaining a smooth flow of the resin at the time of resin filling and ensuring filling.
And if comprised in this way, while using the resin-made spacer 70 which has the cylindrical part 71 which faces the gap part 50 in the fitting state, while being able to hold | maintain the gap | interval of the gap part 50 in a required state, flexible resin The filling operation of the material 60 can be performed easily and reliably, and the soft resin material 60 absorbs vibrations between the core members 30 and 40 during the operation of the reactor 10, thereby easily and reliably noise. It can be reduced.
Furthermore, the bulging support portions 73 and 74 can exhibit an effect in supporting the first core member 30 with respect to the second core member 40 while maintaining a predetermined positional relationship, and the flexible resin material 60. The gap between the bulging support portions 73, 73; 74, 74 functions as a resin reservoir during filling, so that an effect in performing reliable filling can be expected, whereby the vibration absorbing function by the soft resin material 60 can be expected. Can be exhibited.
Further, according to the above-described configuration, the core structure in which the attractive force acting by the magnetic flux between the first core member 30 and the second core member 40 of the reactor 10 is dispersed in a plurality of directions by a curved surface or a plurality of planes. Therefore, it is possible to prevent concentration of the suction force and reduce noise caused by this. Furthermore, according to such a configuration, the heat conductivity from the first core member 30 to the second core member 40 is increased, and as a result, it is possible to expect an improvement in heat dissipation between the coil and the core. There is also.
Note that the present invention is not limited to the structure described in the above-described embodiment, and it goes without saying that the shape and structure of each part can be appropriately modified and changed.
For example, in the above-described embodiment, the core having a circular cross section has been described. However, the present invention is not limited to this, and it is apparent that a rectangular tube shape, an elliptical shape, a polygonal shape, and the like can be appropriately selected.
In the above-described embodiment, the bulging support portions 73 and 74 in the cylindrical portion 71 of the spacer member 70 are formed at the four-point support that is positioned vertically and horizontally in the assembled state of the reactor 10. Although the case where the core members 30 and 40 are positioned and supported has been described, the present invention is not limited to this. For example, when the reactor 10 is assembled, the first core member 30 is supported at three points with respect to the second core member 40 by at least one point located below and at least two points of the upper half. Needless to say. In short, it is only necessary that the bulging support portions 73 and 74 can reliably maintain the positional relationship between the first core member 30 and the second core member 40 in the assembled state of the reactor 10.
1 shows an embodiment of a reactor gap structure according to the present invention, in which (a) and (b) are a schematic perspective view of the reactor and a cross-sectional view taken along the line II of FIG. It is a schematic perspective view which shows the spacer which is the principal part of this invention. It is the principal part expanded sectional view which expanded the A section of FIG. 1 for demonstrating the gap structure of the reactor which concerns on this invention. It is a disassembled perspective view for demonstrating the schematic structure of the whole reactor which applies the gap structure which concerns on this invention.
DESCRIPTION OF SYMBOLS 10 ... Reactor, 11 ... Thermally conductive case, 12 ... Lead part, 13 ... Reactor fixing hole, 20 ... Core, 21 ... Winding, 22 ... Coil, 23 ... Cylindrical body, 30 ... 1st core member, 40 ... 2nd core member, 41 ... fitting recessed part, 50 ... gap part, 51 ... gap part, 60 ... soft resin material, 70 ... spacer member, 71 ... cylindrical part, 72 ... thin part, 73, 74 ... A bulging support part, 75 ... a hole.
At least a winding and a magnetic core are provided, and the core forms a first core member that forms a winding portion around which the winding is wound, and a non-winding portion that does not wind the winding. In the reactor including the two core members, the first core member and the second core member being coupled via a gap,
The first core member is formed as a rod-like body having a circular cross section, an elliptical shape, or a polygonal shape,
Forming the second core member so as to cover an end of the first core member;
The surface on which the suction force acts between the first core member and the second core member is configured by a curved surface or a plurality of planes,
A reactor gap structure, characterized in that a soft resin material is filled in a gap portion formed between the first core member and the second core member.
In the gap structure of the reactor according to claim 1,
The second core member includes a fitting recess in which an end of the first core member faces in a fitted state,
The gap structure of a reactor, wherein the gap portion is formed between a peripheral surface of the fitting recess and an outer peripheral surface of an end portion of the first core member.
In the reactor gap structure according to claim 1 or 2,
A resin spacer member having a cylindrical portion facing the gap portion in a fitted state,
The cylindrical portion is formed as a thin portion, and a bulge support portion that bulges on the outer periphery of the thin portion and substantially contacts the surfaces of the first core member and the second core member during assembly. A reactor gap structure having a plurality of holes formed in the thin wall portion.
In the reactor gap structure according to claim 3,
The bulge support portion of the tubular portion supports the first core member at three points with respect to the second core member at least at one point located below and at least two points on the upper half when the reactor is assembled. Reactor gap structure, characterized in that it is formed as follows.
JP2006316888A 2006-11-24 2006-11-24 Gap construction of reactor Pending JP2008130964A (en)
JP2006316888A JP2008130964A (en) 2006-11-24 2006-11-24 Gap construction of reactor
JP2008130964A true JP2008130964A (en) 2008-06-05
ID=39556471
JP2006316888A Pending JP2008130964A (en) 2006-11-24 2006-11-24 Gap construction of reactor
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