JP2016127109A - Reactor cooling structure - Google Patents

Reactor cooling structure Download PDF

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Publication number
JP2016127109A
JP2016127109A JP2014265976A JP2014265976A JP2016127109A JP 2016127109 A JP2016127109 A JP 2016127109A JP 2014265976 A JP2014265976 A JP 2014265976A JP 2014265976 A JP2014265976 A JP 2014265976A JP 2016127109 A JP2016127109 A JP 2016127109A
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core
reactor
member
cooling
winding
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潤一 寺木
Junichi Teraki
潤一 寺木
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ダイキン工業株式会社
Daikin Ind Ltd
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Abstract

A reactor cooling structure capable of improving the performance of cooling a reactor is provided. A reactor cooling structure (1) includes a reactor (2) and a pressing portion (3). The reactor (2) has a core (21) and a winding (22). The reactor (2) is configured such that the winding (22) is cooled via a core (21) provided in contact with the cooling member (4). The pressing portion (3) is configured to press the core (21) against the cooling member (4) side. [Selection] Figure 1

Description

  The present invention relates to a reactor cooling structure.

  Conventionally, electromagnetic components including a winding and a core such as a reactor, a common mode choke coil, and a transformer are mainly cooled by natural air cooling. In this case, when a large current flows through the electromagnetic component or when the ambient temperature is high, cooling may be insufficient. For this measure, the winding is made thicker to reduce the loss, but the core needs to be enlarged in order to secure the number of turns. For this reason, the entire electromagnetic component is increased in size and weight. This leads to an increase in the cost of the electromagnetic component itself.

  Various proposals have been made regarding cooling of electromagnetic components. Patent Document 1 discloses a reactor cooling structure in which a heat transfer sheet is provided between a winding and a cooling plate. Patent Document 2 discloses a reactor cooling structure in which a heat transfer sheet is provided between a cooler and a winding.

JP 2010-27733 A JP 2007-129146 A

  The cooling structures of Patent Documents 1 and 2 are structures in which the winding is directly cooled by a cooling plate (or a cooler). However, the surface of the wound winding has low planar accuracy and large variation (large unevenness). For this reason, it cannot be said that the heat transfer between the winding and the cooling plate (or the cooler) is good.

  The objective of this invention is providing the cooling structure of the reactor which can improve the performance which cools a reactor.

  The reactor cooling structure of the present invention includes a reactor (2) and a pressing portion (3). The reactor (2) has a core (21) and a winding (22). The reactor (2) is configured such that the winding (22) is cooled via the core (21) provided so as to be in contact with the cooling member (4). The said press part (3) is comprised so that the said core (21) may be pressed on the said cooling member (4) side.

  The present invention does not have a structure in which the winding is directly cooled by a cooling plate (or a cooler) as in Patent Documents 1 and 2, but a core (21) provided so as to be in contact with the cooling member (4) It has a structure in which the winding (22) is cooled directly through (4) and the core (21) is cooled.

  Since the core (21) is not a thin wire wound like the winding (22), the surface of the core (21) can be formed with higher accuracy than the winding (22). is there. Moreover, in the present invention, the core (21) is pressed against the cooling member (4) by the pressing portion (3). Therefore, in this invention, favorable heat transfer property can be ensured between the core (21) and the cooling member (4). As described above, in the present invention, the pressing portion (3) presses the core (21) against the cooling member (4) side and the winding (22) via the core (21) provided so as to be in contact with the cooling member (4). ) Is cooled.

  In Patent Documents 1 and 2, as described above, the surface of the wound winding has low planar accuracy and large variation (large irregularities), so the winding and the cooling plate (or cooler) As for the heat transfer sheet provided in order to maintain the insulation reliability, a thick sheet needs to be used. Therefore, in Patent Documents 1 and 2, a heat transfer sheet having a large thickness causes a thermal resistance between the winding and the cooling plate (or cooler) to increase.

  On the other hand, in the present invention, since the core (21) is not directly cooled but the core (21) is directly cooled, the core (21) and the cooling member (4) are insulated. There is no need, and the structure can be prevented from becoming complicated. In the present invention, the core (21) whose surface can be accurately molded is directly cooled by the cooling member (4). Therefore, in the present invention, it is not necessary to arrange a heat transfer sheet having a large thickness between the core (21) and the cooling member (4). In the present invention, even when the core (21) is provided so as to be in contact with the cooling member (4) through the heat dissipation interface, a heat dissipation interface with good heat transfer properties such as grease or a thin sheet is used. Can do. Therefore, it can suppress that the thermal resistance between a core (21) and a cooling member (4) increases.

  From the above, the reactor cooling structure of the present invention can improve the performance of cooling the reactor (2).

  In the present invention, the state where the core (21) is provided in contact with the cooling member (4) is only when the surface of the core (21) is in direct contact with the surface of the cooling member (4). In addition, the case where the surface of the core (21) is indirectly in contact with the surface of the cooling member (4) through a heat radiation interface (for example, a heat radiation interface having good heat conductivity such as grease or a thin sheet) is included. Yes.

  In the reactor cooling structure, the core (21) is preferably a laminate of electromagnetic steel sheets.

  As the core, a dust core formed by using dust (iron powder, ferrite) is known. However, the dust core has problems such as high cost and low saturation magnetic flux density. On the other hand, the core (21) in this configuration is a laminate of electromagnetic steel sheets. The laminated core (21) on which the electromagnetic steel plates are laminated is less expensive than the dust core and has a high saturation magnetic flux density, and thus the core (21) can be downsized.

  In the cooling structure of the reactor, the distance between the core (21) and the winding (22) on the cooling member (4) side is such that the core (21) on the opposite side of the cooling member (4) and the core (21) The winding (22) is preferably wound so as to be smaller than the distance to the winding (22).

  In this configuration, the distance between the core (21) and the winding (22) on the cooling member (4) side is greater than the distance between the core (21) and the winding (22) on the opposite side of the cooling member (4). Therefore, the thermal resistance between the cooling member (4) and the winding (22) can be reduced, whereby the core (21) between the cooling member (4) and the winding (22) can be reduced. It is possible to improve the heat transfer through the.

  In the cooling structure of the reactor, it is preferable that a thermal resistance reducing member (5) having insulating properties is provided between the core (21) and the winding (22).

  In this configuration, since the insulating thermal resistance reducing member (5) is provided between the core (21) and the winding (22), the core (21) and the winding (22) The thermal resistance between them can be reduced, and thereby the cooling performance for cooling the winding (22) can be further enhanced.

  In the cooling structure of the reactor, the thermal resistance reduction member (5) is a first thermal resistance reduction provided in a gap between the core (21) and the winding (22) on the cooling member (4) side. It preferably includes a member (51).

  In this configuration, the first thermal resistance reducing member (51) is provided in the gap between the core (21) and the winding (22) on the cooling member (4) side. That is, by providing the first thermal resistance reducing member (51), the thermal resistance between the core (21) and the winding (22) can be reduced at a position close to the cooling member (4). Thereby, the heat conductivity through the core (21) between a cooling member (4) and a coil | winding (22) can further be improved.

  In the cooling structure of the reactor, the thermal resistance reducing member (5) is provided in a gap between the core (21) and the winding (22) in a portion different from the first thermal resistance reducing member (51). The second heat resistance reducing member (52), and the heat dissipation (heat transferability) of the first heat resistance reducing member (51) is the heat dissipation of the second heat resistance reducing member (52) ( It is preferably higher than (heat transferability).

  In this configuration, the first thermal resistance reducing member (51) provided at a position close to the cooling member (4) dissipates heat more than the second thermal resistance reducing member (52) provided at a different site. High nature. Therefore, the thermal resistance between the core (21) and the winding (22) can be effectively reduced at a position close to the cooling member (4). Thereby, while improving the heat transfer property via the core (21) between the cooling member (4) and the winding (22) even in a portion different from the first thermal resistance reducing member (51), The thermal conductivity through the core (21) between the cooling member (4) and the winding (22) is effectively reduced at a position close to the cooling member (4) provided with the one thermal resistance reducing member (51). Can be increased.

  In the cooling structure of the reactor, the pressing portion (3) includes a screw (31), and the core (21) is pressed against the cooling member (4) side by fastening the screw (31). It may be configured.

  In this configuration, since the core (21) is pressed against the cooling member (4) side by using the fastening of the screw (31), it is possible to suppress the complicated cooling structure.

  In the cooling structure of the reactor, the pressing portion (3) includes a mounting plate (32) provided on the opposite side of the cooling member (4) with respect to the core (21), and the screw (31). The fastening plate (32) may be configured to push the core (21) toward the cooling member (4) during fastening.

  In this configuration, a function of pushing the core (21) toward the cooling member (4) when the screw (31) is fastened can be realized with a simple structure of the mounting plate (32) and the screw (31).

  In the cooling structure of the reactor, the pressing portion (3) includes a coil bobbin (33) that is wound around the winding (22) and engages with the core (21). A coil bobbin (33) may be configured to push the core (21) toward the cooling member (4).

  In this configuration, the coil bobbin (33) has a function of holding the winding (22) by winding the winding (22) and a core (21) engaged with the coil bobbin (33) by fastening the screw (31). It sometimes has a function of pushing toward the cooling member (4).

  In the cooling structure of the reactor, the screw (31) is inserted into a through hole provided in the core (21), and the screw (31) moves the core (21) when the screw (31) is fastened. You may be comprised so that it may push to the said cooling member (4) side.

  In this configuration, only the screw (31) and the through hole through which the screw (31) is inserted are provided in the core (21), and the core (21) is pushed toward the cooling member (4) when the screw (31) is fastened. Functions can be realized.

  In the cooling structure of the reactor, the reactor (2) is mounted on a printed wiring board (8) together with a power device (7), and the reactor (2) and the power device (7) are one cooling member. It is preferable to cool by (4).

  In the conventional reactor cooling structure, as a countermeasure when the cooling performance of the reactor is not sufficient, the winding is made thicker to reduce the loss. In this case, since it is necessary to increase the size of the core in order to secure the number of turns, the entire reactor is increased in size and weight. This not only increases the cost of the reactor itself, but also makes it difficult to mount it on a printed wiring board like a power device. In this case, sheet metal, wiring, etc. for attaching the reactor are separately required, and further, the cost of assembly is increased. In addition, when a large reactor is mounted on a printed wiring board, a reinforcing member is required, and the board area of the mounting portion is wasted, which both increase costs.

  On the other hand, in the reactor cooling structure of this configuration, the performance of cooling the reactor (2) can be improved, so that the reactor (2) can be prevented from being increased in size and weight. Therefore, in this configuration, even if the reactor (2) is mounted on the printed wiring board (8), it is possible to avoid that the board area of the mounting portion is wasted. Moreover, in this structure, both a reactor (2) and a power device (7) can be cooled by one cooling member (4).

  In particular, when the core (21) is a laminated core (21) in which electromagnetic steel sheets are laminated, since the saturation magnetic flux density is large, the core (21) can be further miniaturized. When mounting on a board (8), it can further suppress that the board | substrate area of the mounting part of a core (21) becomes large.

  As described above, according to the present invention, the performance of cooling the reactor can be improved.

(A) is the front view which shows the cooling structure of the reactor which concerns on 1st Embodiment of this invention, (B) is the side view which looked at the cooling structure of the reactor shown to (A) from the direction of arrow IB. is there. It is a side view which shows the core in the cooling structure of the reactor which concerns on 1st Embodiment. It is a perspective view which shows the core and coil | winding in the cooling structure of the reactor which concerns on 1st Embodiment. It is the front view which shows the cooling structure of the reactor which concerns on the modification of 1st Embodiment, (B) is the side view which looked at the cooling structure of the reactor shown to (A) from the direction of arrow IVB. (A) is a side view which shows an example of a cooling member, (B) is a side view which shows the other example of a cooling member. It is a side view which shows an example of the cooling structure which mounts a reactor and a power device on a printed wiring board, and cools these with a cooling member. (A) is a front view which shows the cooling structure of the reactor which concerns on 2nd Embodiment of this invention, (B) is the top view which looked at the cooling structure of the reactor shown to (A) from the direction of arrow VIIB. is there. (A) is the front view which shows the core in the cooling structure of the reactor which concerns on 2nd Embodiment, (B) is the side view which looked at the cooling structure of the reactor shown to (A) from the direction of arrow VIIIB. (C) is the top view which looked at the cooling structure of the reactor shown to (A) from the direction of arrow VIIIC. It is a perspective view which shows a part of core in the cooling structure of the reactor which concerns on 2nd Embodiment. (A) is a front view which shows the coil bobbin in the cooling structure of the reactor which concerns on 2nd Embodiment of this invention, (B) is the top view which looked at the coil bobbin shown to (A) from the direction of arrow XB. . (A)-(C) are figures which show the procedure of the assembly of the cooling structure of the reactor which concerns on 2nd Embodiment. (A)-(C) are figures which show the procedure of the assembly of the cooling structure of the reactor which concerns on 2nd Embodiment. It is a front view which shows the cooling structure of the reactor which concerns on the modification of 2nd Embodiment. In the front view, a part of the cross section is shown.

  Hereinafter, a reactor cooling structure according to an embodiment of the present invention will be described with reference to the drawings. The reactor cooling structure of the present embodiment can be applied to a refrigeration apparatus including a refrigerant circuit that performs a vapor compression refrigeration cycle, such as an air conditioner, a heat pump water heater, etc. Applications are not limited to refrigeration equipment. The reactor is provided for the purpose of improving the power factor of an inverter circuit, for example.

[First Embodiment]
FIG. 1A is a front view showing a cooling structure 1 of a reactor 2 according to the first embodiment of the present invention, and FIG. 1B shows a cooling structure 1 of the reactor 2 shown in FIG. It is the side view seen from the direction of arrow IB. FIG. 2 is a side view showing the core 21 in the cooling structure 1 of the reactor 2 according to the first embodiment. FIG. 3 is a perspective view showing the core 21 and the winding 22 in the cooling structure 1 for the reactor 2 according to the first embodiment.

  A cooling structure 1 for a reactor 2 according to the present embodiment includes a reactor 2, a pressing portion 3, and a cooling member 4. The reactor 2 has a core 21 and a winding 22.

  The core 21 is configured by combining two members 23 and 24. Specifically, in the first embodiment, as shown in FIG. 2, the core 21 includes an E-type first core member 23 in a side view and an I-type second core member 24 in a side view. Yes. The core 21 has a substantially rectangular parallelepiped shape as a whole.

  The first core member 23 is integrally formed with a flat plate-like substrate portion 23a and a plurality of flat plate-like wall portions 23b, 23c, and 23d that extend substantially parallel to each other in a direction orthogonal to the substrate portion 23a from the substrate portion 23a. It has the structure formed in. In the present embodiment, the plurality of wall portions 23b, 23c, and 23d include a pair of side wall portions 23b and 23c located on both sides, and a central wall portion 23d located therebetween. These wall parts 23b, 23c, and 23d are provided at intervals. Thus, a winding arrangement space A1 is formed between the side wall part 23b and the central wall part 23d, and a winding arrangement space A2 is formed between the side wall part 23c and the central wall part 23d.

  The second core member 24 has a flat plate shape and has approximately the same size as the substrate portion 23 a of the first core member 23. As shown in FIGS. 1 (A), 1 (B) and 2, the second core member 24 is formed at the front end portions of the wall portions 23b, 23c, 23d of the first core member 23 (FIGS. 1 (A), (B)). And in FIG. 2, it arrange | positions so that wall part 23b, 23c, the upper end part of 23d) may be touched. The second core member 24 is integrated with the first core member 23 by means such as bonding.

  The core 21 has a heat transfer surface S1. The heat transfer surface S1 is a surface facing a surface S2 of the cooling member 4 described later. In the present embodiment, the heat transfer surface S1 of the core 21 is a flat surface, and the surface S2 of the cooling member is also a flat surface. As shown in FIGS. 1B, 2, and 3, the core 21 includes an inner surface S <b> 3 (bottom surface S <b> 3) that connects one side wall 23 b and the central wall 23 d of the first core member 23, and the first core. The member 23 has an inner surface S3 (bottom surface S3) that connects the other side wall 23c and the central wall 23d. The core 21 has an inner surface S4 (top surface S4) that is a main surface of the second core member 24 on the first core member 23 side. A pair of inner surface S3 and inner surface S4 are opposed to each other with a space therebetween. In the present embodiment, the pair of inner surface S3 and inner surface S4 are planes parallel to each other.

  In the present embodiment, as shown in FIGS. 1A and 3, the core 21 is formed by laminating a plurality of thin electromagnetic steel plates. The laminated core 21 using such a laminated electromagnetic steel sheet is cheaper than, for example, a dust core, and can be downsized because the saturation magnetic flux density is large. Moreover, the lamination | stacking core 21 using a lamination | stacking electromagnetic steel plate can raise the planar accuracy of the heat-transfer surface S1. Therefore, it is not necessary to use a heat transfer sheet having a large thickness as in Patent Documents 1 and 2, and the heat radiation interface 5 having good heat transfer performance such as grease can be used. Thereby, it can suppress that the thermal resistance between the core 21 and the cooling member 4 increases, and cooling performance improves.

  The winding 22 is made of, for example, a copper wire. In the present embodiment, as shown in FIG. 3, the winding 22 is wound around the central wall 23 d of the core 21 and formed as a coil. As shown in FIGS. 1A, 1B and 3, the winding 22 has a gap between one side wall 23b and the central wall 23d and a gap between the other side wall 23c and the central wall 23d. The end of the winding 22 that makes a U-turn is disposed outside the core 21. In FIG. 3, only a part of the winding 22 is illustrated so that the arrangement state of the winding 22 is easy to understand. However, in actuality, the number of turns of the winding 22 is illustrated in FIG. 3. There are more than there are.

  In this embodiment, in order to improve the planar accuracy of the heat transfer surface S1, a core 21 in which electromagnetic steel sheets are laminated is used. The core 21 is directly attached to the cooling member 4 to be cooled, and the core 21 is wound through the core 21. The wire 22 is indirectly cooled. Moreover, since the core 21 is pressed against the cooling member 4 side by the pressing portion 3 to be described later, the adhesion between the heat transfer surface S1 of the core 21 and the surface S2 of the cooling member 4 is improved, and the heat transfer between them is increased. Can be improved.

  The heat transfer surface S1 of the core 21 is not provided with a mounting plate such as a metal plate for heat transfer, for example, and the planar portion (heat transfer surface S1) of the core 21 formed of laminated electromagnetic steel sheets is directly attached to the cooling member 4. It is in contact with the surface. At this time, in order to reduce the thermal resistance between the core 21 and the cooling member 4, a heat radiation interface 6 such as a sheet or grease is interposed between the core 21 and the cooling member 4.

  In order to reduce the thermal resistance between the core 21 and the winding 22 while insulating the core 21, the following structure is preferable. For example, the gap between the core 21 and the winding 22 is filled with the thermal resistance reducing member 5 that is insulative and has good thermal conductivity. As a method of providing the thermal resistance reducing member 5 in the gap between the core 21 and the winding 22, for example, the sheet-like thermal resistance reducing member 5 (heat radiating sheet) is disposed in the gap between the core 21 and the winding 22. And a method of filling the gap between the core 21 and the winding 22 with a resin having an insulating property and good thermal conductivity, but is not limited thereto.

  Examples of the material of the insulating thermal resistance reducing member 5 provided in the gap between the core 21 and the winding 22 include a heat conductive sheet in which an insulating filler such as ceramic powder is mixed with silicone rubber. Can do.

  The thermal resistance reducing member 5 includes a first thermal resistance reducing member 51 provided in a gap between the core 21 and the winding 22 on the cooling member 4 side, and a core 21 in a portion different from the first thermal resistance reducing member 51. And a second thermal resistance reducing member 52 provided in a gap between the winding 22 and the winding 22 may be included. In this case, the heat dissipation of the first thermal resistance reducing member 51 may be higher than the heat dissipation of the second thermal resistance reducing member 52.

  As shown in FIG. 1B, the distance D1 between the core 21 and the winding 22 on the cooling member 4 side is smaller than the distance D2 between the core 21 and the winding 22 on the opposite side to the cooling member 4. Winding 22 is wound around the wire. That is, it arrange | positions so that the coil | winding 22 may be pressed on the cooling member 4 side. As a result, the distance D1 between the inner surface S3 of the core 21 and the winding 22 is smaller than the distance D2 between the inner surface S4 of the core 21 and the winding 22. In this case, it is possible to reduce the thermal resistance between the cooling member 4 and the winding 22, thereby improving the heat transfer through the core 21 between the cooling member 4 and the winding 22. it can.

  In the present embodiment, as shown in FIGS. 1A and 1B, the surface of the core 21 (the lower surface of the core 21 in FIGS. 1A and 1B) is the surface of the cooling member 4. (In FIGS. 1A and 1B, the upper surface of the cooling member 4) is provided so as to be indirectly contacted via the heat dissipation interface 6 (thermal resistance reducing member 6), but is not limited thereto. Absent. The heat radiation interface 6 between the core 21 and the cooling member 4 can be omitted. In this case, the core 21 is provided such that the surface thereof is in direct contact with the surface of the cooling member 4. As the heat dissipation interface 6, for example, a known heat dissipation interface such as grease or a sheet having good heat conductivity can be used.

  In this embodiment, as shown to FIG. 1 (A) and FIG. 1 (B), the press part 3 is provided with the screw 31, and when the screw 31 is fastened, the core 21 is pressed against the cooling member 4 side. It is configured. Specifically, the pressing portion 3 includes an attachment plate 32 provided on the opposite side of the cooling member 4 with respect to the core 21 so that the attachment plate 32 pushes the core 21 toward the cooling member 4 when the screw 31 is fastened. It is configured.

  The mounting plate 32 is a plate-like member and is disposed so as to face the outer surface S5 of the core 21. The outer surface S5 of the core 21 is a surface opposite to the heat transfer surface S1, and is formed in a plane parallel to the heat transfer surface S1 in this embodiment. The mounting plate 32 is disposed so that the inner surface thereof is in contact with the outer surface S5 of the core 21. As shown in FIG. 1A, the mounting plate 32 has a length that is greater than the width of the core 21, and each of both ends of the mounting plate 32 protrudes outward from the core 21. The protruding both ends are provided with through holes for inserting the screws 31.

  In the present embodiment, the pressing portion 3 has a plurality of screws 31, and these screws 31 are inserted through a plurality of through holes provided in the mounting plate 32. The screw 31 is disposed so that its shaft portion 31b extends toward the cooling member 4, and a male screw formed in the shaft portion 31 b is screwed into a female screw in a hole formed in the cooling member 4. At this time, the head portion 31a of the screw 31 pushes the mounting plate 32 toward the cooling member 4 side. As a result, the core 21 is pushed toward the cooling member 4 by the mounting plate 32. In the present embodiment, the simple structure of the mounting plate 32 and the screw 31 can realize a function of pushing the core 21 toward the cooling member 4 when the screw 31 is fastened.

  Further, in the present embodiment, the screw 31 is disposed inside the winding 22 (specifically, inside the U-turn portion of the winding 22). It may be arranged. Moreover, the structure which ensures the insulation of the bis | screw 31 and the coil | winding 22 may be employ | adopted. Specifically, for example, a method of forming the screw 31 itself with an insulating material, a method of coating the surface of the screw 31 with an insulating coating, an insulating sheet or the like in the gap between the screw 31 and the winding 22 Although the method etc. which arrange | position a member can be illustrated, it is not restricted to these.

  The screw 31 may be inserted into a through hole (not shown) provided in the core 21 so that the screw 31 pushes the core 21 toward the cooling member 4 when the screw 31 is fastened. In this case, the mounting plate 32 can be omitted.

  FIG. 4A is a front view showing a cooling structure 1 of the reactor 2 according to a modification of the first embodiment, and FIG. 4B shows a cooling structure 1 of the reactor 2 shown in FIG. It is the side view seen from the direction of arrow IVB.

  As shown in FIGS. 4A and 4B, the core 21 in the modified example of the first embodiment is flattened compared to the core 21 in FIGS. 1A and 1B. Specifically, the core 21 in the modified example has a height (thickness) in a direction perpendicular to the surface S2 of the cooling member 4 as compared with the height (thickness) of the core 21 in FIGS. small. In the modification, in the front view shown in FIG. 4A, the width of the core 21 (the dimension in the left-right direction in FIG. 4A) is higher than the height of the core 21 (the dimension in the vertical direction in FIG. 4A). Is bigger. By flattening the core 21 in this way, the winding 22 can be disposed closer to the cooling member 4 as a whole, so that the effect of cooling the winding 22 can be enhanced (the heat dissipation of the winding 22 is improved). improves).

  FIG. 5A is a side view showing an example of the cooling member 4. The cooling member 4 shown in FIG. 5A includes a refrigerant jacket 41, and the refrigerant jacket 41 is provided so as to be in contact with the refrigerant pipe 42 through which the refrigerant of the refrigerant circuit in the refrigeration apparatus flows. The refrigerant pipe 42 in contact with the medium jacket 41 may be a refrigerant pipe through which a refrigerant having a temperature capable of cooling the reactor 2 flows in the refrigerant circuit. As the refrigerant pipe 42, for example, a liquid pipe in which a liquid refrigerant flows in a refrigerant circuit can be used, but the refrigerant pipe 42 is not limited to this. In the cooling member 4 shown in FIG. 5A, the low-temperature refrigerant flowing through the refrigerant pipe 42 can cool the core 21 of the reactor 2 through the refrigerant jacket 41.

  FIG. 5B is a side view showing another example of the cooling member 4. The cooling member 4 shown in FIG. 5B includes a heat sink 43 having a large number of fins 44. In the cooling member 4 shown in FIG. 5B, heat is radiated from the numerous fins 44, so that the core 21 of the reactor 2 provided so as to be in contact with the heat sink 43 can be cooled.

  FIG. 6 is a side view showing an example of the cooling structure 1 in which the reactor 2 and the power device 7 are mounted on the printed wiring board 8 and cooled by the cooling member 4.

  In the reactor cooling structure 1, the reactor 2 is mounted on the printed wiring board 8 together with the power device 7, and the reactor 2 and the power device 7 are cooled by one cooling member 4.

  The reactor 2 shown in FIGS. 4A and 4B is used. A lead portion 22 a of the winding 22 is connected to the printed wiring board 8.

  The power device 7 includes a device main body portion 71 that generates heat during use, and a lead portion 72 that extends from the device main body portion 71 toward the printed wiring board 8. The lead part 72 is connected to the printed wiring board 8.

  Although the cooling member 4 is attached to the printed wiring board 8 by the fixing member 81, for example, the fixing method of the cooling member 4 is not limited to this.

  In the conventional reactor cooling structure, as a countermeasure when the cooling performance of the reactor is not sufficient, the winding is made thicker to reduce the loss. In this case, since it is necessary to increase the size of the core in order to secure the number of turns, the entire reactor is increased in size and weight. This not only increases the cost of the reactor itself, but also makes it difficult to mount it on a printed wiring board like a power device. In this case, sheet metal, wiring, etc. for attaching the reactor are separately required, and further, the cost of assembly is increased. In addition, when a large reactor is mounted on a printed wiring board, a reinforcing member is required, and the board area of the mounting portion is wasted, which both increase costs.

  On the other hand, in the cooling structure 1 of the reactor 2 of this embodiment, since the performance which cools the reactor 2 can be improved, it can suppress that the reactor 2 enlarges and a weight increases. Therefore, in this configuration, even if the reactor 2 is mounted on the printed wiring board 8, it is possible to avoid wasting the board area of the mounting portion. In this configuration, both the reactor 2 and the power device 7 can be cooled by the single cooling member 4.

  In particular, when the core 21 is a laminated core 21 in which electromagnetic steel sheets are laminated, the core 21 can be further miniaturized because the saturation magnetic flux density is large. Therefore, when the core 21 is mounted on the printed wiring board 8, An increase in the board area of the mounting portion of the core 21 can be further suppressed.

  Moreover, as shown in FIG. 6, in the reactor 2, the flattened core 21 as shown in FIGS. 4 (A) and 4 (B) is used. Accordingly, the overall height of the reactor 2 can be reduced. Thereby, it can arrange | position with the power device 7 in the clearance gap between the printed wiring board 8 and the cooling member 4. FIG.

[Second Embodiment]
FIG. 7A is a front view showing the cooling structure 1 of the reactor 2 according to the second embodiment of the present invention, and FIG. 7B shows the cooling structure 1 of the reactor 2 shown in FIG. It is the top view seen from the direction of arrow VIIB. FIG. 8A is a front view showing a core in the cooling structure 1 of the reactor 2 according to the second embodiment, and FIG. 8B shows the cooling structure 1 of the reactor 2 shown in FIG. It is the side view seen from the direction of VIIIB. FIG. 9 is a perspective view showing a part of the core 21 in the cooling structure 1 of the reactor 2 according to the second embodiment. FIG. 10 (A) is a front view showing the coil bobbin 33 in the cooling structure 1 for the reactor 2 according to the second embodiment of the present invention, and FIG. 10 (B) shows the coil bobbin 33 shown in FIG. 10 (A) with an arrow. It is the top view seen from the direction of XB. FIGS. 11A to 11C are diagrams illustrating an assembling procedure of the cooling structure 1 of the reactor 2 according to the second embodiment. FIGS. 12A to 12C are diagrams illustrating an assembling procedure of the cooling structure 1 of the reactor 2 according to the second embodiment.

  As shown in these drawings, the cooling structure 1 of the reactor 2 of the second embodiment includes a reactor 2, a pressing portion 3, and a cooling member 4, as in the first embodiment. The reactor 2 has a core 21 and a winding 22.

  And in 2nd Embodiment, the press part 3 is provided with the coil bobbin 33 which the coil | winding 22 is wound and engages with the core 21, and the coil bobbin 33 pushes the core 21 to the cooling member 4 side at the time of the screw | thread 31 fastening. It is configured. That is, the coil bobbin 33 has a function of holding the winding 22 by winding the winding 22 and a function of pushing the core 21 engaged with the coil bobbin 33 toward the cooling member 4 when the screw 31 is fastened.

  Therefore, the second embodiment includes a structure in which the core 21 provided so as to be in contact with the cooling member 4 is directly cooled by the cooling member 4 and the winding 22 is cooled through the core 21. This is the same as in the first embodiment. Hereinafter, a specific structure of the second embodiment will be described.

  As shown in FIGS. 8A to 8C and FIG. 9, the core 21 is configured by combining two members 23 and 24. Specifically, in the second embodiment, as shown in FIGS. 8B and 9, the core 21 includes an E-type first core member 23 in a side view and an E-type second core member in a side view. 24. The core 21 has a substantially rectangular parallelepiped shape as a whole. These two E-shaped core members 23 and 24 have substantially the same structure.

  Also in 2nd Embodiment, as shown to FIG. 8 (A), (C) and FIG. 9, the core 21 is formed by laminating | stacking a some thin plate-shaped electromagnetic steel plate.

  The first core member 23 is integrally formed with a flat plate-like substrate portion 23a and a plurality of flat plate-like wall portions 23b, 23c, and 23d that extend substantially parallel to each other in a direction orthogonal to the substrate portion 23a from the substrate portion 23a. It has the structure formed in. In the second embodiment, the plurality of wall portions 23b, 23c, and 23d include a pair of side wall portions 23b and 23c located on both sides, and a central wall portion 23d located therebetween. These wall parts 23b, 23c, and 23d are provided at intervals. The shape of the second core member 24 is the same as this. The second core member 24 is integrated with the first core member 23 by means such as bonding.

  The first core member 23 and the second core member 24 are overlapped with each other in such a posture that the respective substrate portions 23a and 24a are disposed on the outside. Thereby, the bobbin arrangement space B1 is formed between the side wall parts 23b, 24b and the central wall parts 23d, 24d, and the bobbin arrangement space B2 is formed between the side wall parts 23c, 24c and the central wall parts 23d, 24d. ing.

  The core 21 has a heat transfer surface S1. The heat transfer surface S1 is a surface facing the surface S2 of the cooling member 4. Also in the second embodiment, the heat transfer surface S1 of the core 21 is a flat surface, and the surface S2 of the cooling member is also a flat surface. The core 21 has an outer surface S5. The outer surface S5 is a surface opposite to the heat transfer surface S1, and is formed in a plane parallel to the heat transfer surface S1 in this embodiment.

  Furthermore, the core 21 has a pressed surface S3. The pressed surface S3 is a surface on which the core 21 is pressed toward the cooling member 4 by the coil bobbin 33 of the pressing portion 3 when the screw is fastened. In the present embodiment, the pressed surface S3 includes an inner surface S3 (bottom surface S3) connecting one side wall portion 23b and the central wall portion 23d of the first core member 23, and the other side wall portion 23c of the first core member 23. It is comprised by the inner surface S3 (bottom surface S3) which connects 23d of center walls. The pressed surface S3 of the core 21 is configured to be pressed by a pressing surface S6 of a coil bobbin 33 described later.

  As shown in FIGS. 7, 10 </ b> A, and 10 </ b> B, the coil bobbin 33 includes a main body portion 34, a first flange portion 35, a second flange portion 36, and a pair of leg portions 37. .

  The main body 34 is a part around which the winding 22 is wound. In the present embodiment, the main body 34 is formed in a ring shape. The main body 34 has a side wall surface 34a extending in an annular shape. The main body 34 has a shape close to a rectangle in plan view. The side wall surface 34a includes a pair of side wall surfaces 34b facing each other in a plan view, and a pair of side wall surfaces 34c approximately perpendicular to the side wall surface 34b. The side wall surface 34b is larger in dimension in the direction parallel to the surface S2 of the cooling member 4 than the side wall surface 34c.

  The first flange 35 projects outward from the periphery on the cooling member 4 side in the main body 34 in a direction along the surface S2 of the cooling member 4 (specifically, a direction parallel to the surface S2). The first flange 35 is formed over substantially the entire circumference of the main body 34. The first flange 35 is a plate-like part that is substantially parallel to the surface S <b> 2 of the cooling member 4.

  The second flange 36 extends outward from the peripheral edge of the main body 34 opposite to the cooling member 4 in a direction along the surface S2 of the cooling member 4 (specifically, a direction parallel to the surface S2). . The second flange portion 36 is formed over substantially the entire circumference of the main body portion 34. The second flange 36 is a plate-like part that is substantially parallel to the surface S <b> 2 of the cooling member 4.

  The pair of leg portions 37 extend from the first flange portion 35 toward the cooling member 4 at positions corresponding to the pair of side wall surfaces 34c. End surfaces S7 of the pair of leg portions 37 are close to or in contact with the surface S2 of the cooling member 4. The pair of leg portions 37 are not provided at positions corresponding to the pair of side wall surfaces 34b. As a result, as shown in FIG. 10A, a recess 39 is formed by the first flange 35 and the pair of legs 37. The recess 39 has a shape that is recessed from the end surface S <b> 7 of the pair of leg portions 37 to the side opposite to the cooling member 4. The recess 39 has a surface S6 parallel to the surface S2 of the cooling member 4. This surface 6 is the pressing surface S6 described above.

  The central portion of the coil bobbin 33 has a hollow portion 38 that penetrates the coil bobbin 33 in a direction perpendicular to the surface S <b> 2 of the cooling member 4. The hollow portion 38 has a substantially rectangular shape in plan view. As shown in FIGS. 11A, 12B, and 12C, the central wall portion 23d of the first core member 23 is inserted into the hollow portion 38 from the cooling member 4 side, and the second core member 24 is inserted. The central wall portion 24d is inserted from the side opposite to the cooling member 4. The pair of side wall portions 23 b and 23 c of the first core member 23 and the pair of side wall portions 24 b and 24 c of the second core member 24 are disposed outside the coil bobbin 33.

  Therefore, as shown in FIG. 12B, the pressing surface S6 of the coil bobbin 33 (the lower surface S6 of the first flange 35 in FIG. 12B) is against the pressed surface S3 of the first core member 23. The cooling member 4 is disposed at a position facing the direction perpendicular to the surface S2 of the cooling member 4 (the vertical direction in FIG. 12B).

  The coil bobbin 33 is provided with a through hole 33 a for inserting the screw 31. In the second embodiment, the pressing portion 3 has a plurality of screws 31, and these screws 31 are inserted into a plurality of through holes 33 a provided in the coil bobbin 33. The screw 31 is disposed so that its shaft portion 31b extends toward the cooling member 4, and a male screw formed in the shaft portion 31 b is screwed into a female screw in a hole formed in the cooling member 4. At this time, the head portion 31 a of the screw 31 pushes the surface of the second flange portion 36 of the coil bobbin 33 toward the cooling member 4. As a result, the pressed surface S3 of the core 21 is pressed toward the cooling member 4 by the pressing surface S6 of the coil bobbin 33.

  The coil bobbin 33 is formed of a thermally conductive resin having an insulating property. As a material of such a heat conductive resin having an insulating property, for example, a heat conductive PA resin in which an insulating filler such as a ceramic powder is blended with a polyamide (PA) resin can be cited.

  FIG. 13 is a front view showing a cooling structure 1 for a reactor 2 according to a modification of the second embodiment. In the front view, a part of the cross section is shown. In the modification shown in FIG. 13, the entire reactor 2 is covered with the sealing resin 53 except for the heat transfer surface S <b> 1 of the core 21. However, the sealing resin 53 can be omitted.

[Summary of Embodiment]
The reactor cooling structure of this embodiment includes a reactor 2 and a pressing portion 3. The reactor 2 has a core 21 and a winding 22. The reactor 2 is configured such that the winding 22 is cooled via a core 21 provided so as to be in contact with the cooling member 4. The pressing part 3 is configured to press the core 21 against the cooling member 4 side.

  In this embodiment, the windings are not directly cooled by a cooling plate (or a cooler) as in Patent Documents 1 and 2, but the core 21 provided so as to be in contact with the cooling member 4 is directly formed by the cooling member 4. The coil 22 is cooled and the winding 22 is cooled via the core 21.

  Since the core 21 is not a thin wire wound like the winding 22, the surface of the core 21 can be formed with higher accuracy than the winding 22. Moreover, in the present embodiment, the core 21 is pressed against the cooling member 4 side by the pressing portion 3. Therefore, in this embodiment, good heat transfer can be ensured between the core 21 and the cooling member 4. Thus, in this embodiment, the press part 3 presses the core 21 to the cooling member 4 side, and the coil | winding 22 is cooled via the core 21 provided so that the cooling member 4 may be contact | connected.

  In Patent Documents 1 and 2, as described above, the surface of the wound winding has low planar accuracy and large variation (large irregularities), so the winding and the cooling plate (or cooler) As for the heat transfer sheet provided in order to maintain the insulation reliability, a thick sheet needs to be used. Therefore, in Patent Documents 1 and 2, a heat transfer sheet having a large thickness causes a thermal resistance between the winding and the cooling plate (or cooler) to increase.

  On the other hand, in the present embodiment, since the core 22 is not directly cooled but the core 21 is directly cooled, it is not necessary to insulate between the core 21 and the cooling member 4 and the structure is complicated. Can be suppressed. In the present embodiment, the cooling member 4 directly cools the core 21 whose surface can be accurately molded. Therefore, in this embodiment, it is not necessary to arrange a heat transfer sheet having a large thickness between the core 21 and the cooling member 4. In the present embodiment, even if the core 21 is provided so as to be in contact with the cooling member 4 via the heat dissipation interface, a heat dissipation interface with good heat transfer properties such as grease or a thin sheet can be used. Therefore, it is possible to suppress an increase in thermal resistance between the core 21 and the cooling member 4.

  From the above, the reactor cooling structure of the present embodiment can improve the performance of cooling the reactor 2.

  In the reactor cooling structure, the core 21 is preferably a laminate of electromagnetic steel sheets.

  As the core, a dust core formed by using dust (iron powder, ferrite) is known. However, the dust core has problems such as high cost and low saturation magnetic flux density. On the other hand, the core 21 in this configuration is a laminate of electromagnetic steel plates. The laminated core 21 in which the electromagnetic steel plates are laminated is less expensive than the dust core and has a high saturation magnetic flux density, so that the core 21 can be downsized.

  In the reactor cooling structure, the winding 22 is wound so that the gap between the core 21 and the winding 22 on the cooling member 4 side is smaller than the gap between the core 21 and the winding 22 on the opposite side to the cooling member 4. It is preferred that

  In this configuration, the gap between the core 21 and the winding 22 on the cooling member 4 side is smaller than the gap between the core 21 and the winding 22 on the opposite side to the cooling member 4. The thermal resistance between the cooling member 4 and the winding 22 can be increased, thereby improving the heat transfer property through the core 21.

  In the reactor cooling structure, it is preferable that an insulating thermal resistance reducing member 5 is provided between the core 21 and the winding 22.

  In this configuration, since the thermal resistance reducing member 5 having insulating properties is provided between the core 21 and the winding 22, the thermal resistance between the core 21 and the winding 22 can be reduced. Thereby, the cooling performance which cools the coil | winding 22 can be improved more.

  In the reactor cooling structure, the thermal resistance reducing member 5 preferably includes a first thermal resistance reducing member 51 provided in a gap between the core 21 and the winding 22 on the cooling member 4 side.

  In this configuration, the first thermal resistance reduction member 51 is provided in the gap between the core 21 and the winding 22 on the cooling member 4 side. That is, by providing the first thermal resistance reducing member 51, the thermal resistance between the core 21 and the winding 22 can be reduced at a position close to the cooling member 4. Thereby, the heat conductivity via the core 21 between the cooling member 4 and the coil | winding 22 can further be improved.

  In the reactor cooling structure, the thermal resistance reducing member 5 includes a second thermal resistance reducing member 52 provided in a gap between the core 21 and the winding 22 in a portion different from the first thermal resistance reducing member 51, The heat dissipation (heat transferability) of the first thermal resistance reduction member 51 is preferably higher than the heat dissipation (heat transferability) of the second heat resistance reduction member 52.

  In this configuration, the first thermal resistance reducing member 51 provided at a position close to the cooling member 4 has higher heat dissipation than the second thermal resistance reducing member 52 provided at a different site. Therefore, the thermal resistance between the core 21 and the winding 22 can be effectively reduced at a position close to the cooling member 4. Thereby, while improving the heat conductivity via the core 21 between the cooling member 4 and the coil | winding 22 also in a site | part different from the 1st thermal resistance reduction member 51, especially the 1st thermal resistance reduction member 51 is. The heat transfer property through the core 21 between the cooling member 4 and the winding 22 can be effectively enhanced at a position close to the provided cooling member 4.

  In the reactor cooling structure, the pressing portion 3 may include a screw 31, and the core 21 may be pressed against the cooling member 4 when the screw 31 is fastened.

  In this configuration, since the core 21 is pressed against the cooling member 4 side by using the fastening of the screw 31, it is possible to prevent the cooling structure from becoming complicated.

  In the reactor cooling structure, the pressing portion 3 includes a mounting plate 32 provided on the opposite side of the cooling member 4 with respect to the core 21, and the mounting plate 32 moves the core 21 toward the cooling member 4 when the screw 31 is fastened. It may be configured to push.

  In this configuration, the function of pushing the core 21 toward the cooling member 4 when the screw 31 is fastened can be realized with a simple structure of the mounting plate 32 and the screw 31.

  In the reactor cooling structure, the pressing portion 3 includes a coil bobbin 33 around which the winding 22 is wound and is engaged with the core 21, and the coil bobbin 33 is configured to push the core 21 toward the cooling member 4 when the screw 31 is fastened. It may be.

  In this configuration, the coil bobbin 33 has both a function of holding the winding 22 by winding the winding 22 and a function of pushing the core 21 engaged with the coil bobbin 33 toward the cooling member 4 when the screw 31 is fastened. Yes.

  In the reactor cooling structure, the screw 31 may be inserted into a through hole provided in the core 21, and the screw 31 may be configured to push the core 21 toward the cooling member 4 when the screw 31 is fastened.

  In this configuration, a function of pushing the core 21 toward the cooling member 4 when the screw 31 is fastened can be realized only by providing the core 21 with the screw 31 and a through hole through which the screw 31 is inserted.

  In the reactor cooling structure, it is preferable that the reactor 2 is mounted on the printed wiring board 8 together with the power device 7, and the reactor 2 and the power device 7 are cooled by one cooling member 4.

  In the conventional reactor cooling structure, as a countermeasure when the cooling performance of the reactor is not sufficient, the winding is made thicker to reduce the loss. In this case, since it is necessary to increase the size of the core in order to secure the number of turns, the entire reactor is increased in size and weight. This not only increases the cost of the reactor itself, but also makes it difficult to mount it on a printed wiring board like a power device. In this case, sheet metal, wiring, etc. for attaching the reactor are separately required, and further, the cost of assembly is increased. In addition, when a large reactor is mounted on a printed wiring board, a reinforcing member is required, and the board area of the mounting portion is wasted, which both increase costs.

  On the other hand, in the cooling structure of the reactor of this structure, since the performance which cools the reactor 2 can be improved, it can suppress that the reactor 2 enlarges and a weight increases. Therefore, in this configuration, even if the reactor 2 is mounted on the printed wiring board 8, it is possible to avoid wasting the board area of the mounting portion. In this configuration, both the reactor 2 and the power device 7 can be cooled by the single cooling member 4.

  In particular, when the core 21 is a laminated core 21 in which electromagnetic steel sheets are laminated, the core 21 can be further miniaturized because the saturation magnetic flux density is large. Therefore, when the core 21 is mounted on the printed wiring board 8, An increase in the board area of the mounting portion of the core 21 can be further suppressed.

  Note that the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made without departing from the spirit of the present invention.

  In the said embodiment, although the core 21 laminated | stacked the electromagnetic steel plate, it is not restricted to this.

  Further, the distance between the core 21 and the winding 22 on the cooling member 4 side is configured to be smaller than the distance between the core 21 and the winding 22 on the side opposite to the cooling member 4. I can't.

  In the embodiment, the first thermal resistance reducing member 51 and the second thermal resistance reducing member 52 are provided, but only the thermal resistance reducing member made of the same material is provided in the gap between the core 21 and the winding 22. May be provided.

DESCRIPTION OF SYMBOLS 1 Reactor cooling structure 2 Reactor 3 Press part 4 Cooling member 5 Thermal resistance reduction member 6 Thermal resistance reduction member 7 Power device 8 Printed wiring board 21 Core 22 Winding 23 1st core member 24 2nd core member 31 Screw 32 Mounting plate 33 Coil bobbin 41 Refrigerant jacket 42 Refrigerant piping 43 Heat sink 51 First thermal resistance reducing member 52 Second thermal resistance reducing member

Claims (11)

  1. It has a core (21) and a winding (22), and is configured such that the winding (22) is cooled via the core (21) provided so as to be in contact with the cooling member (4). Reactor (2),
    A reactor cooling structure comprising: a pressing portion (3) configured to press the core (21) against the cooling member (4) side.
  2.   The reactor cooling structure according to claim 1, wherein the core (21) is a laminate of electromagnetic steel sheets.
  3.   The distance between the core (21) and the winding (22) on the cooling member (4) side is the distance between the core (21) and the winding (22) on the opposite side to the cooling member (4). The reactor cooling structure according to claim 1 or 2, wherein the winding (22) is wound so as to be smaller than a distance.
  4.   The reactor according to any one of claims 1 to 3, wherein an insulating thermal resistance reducing member (5) is provided between the core (21) and the winding (22). Cooling structure.
  5.   The thermal resistance reducing member (5) includes a first thermal resistance reducing member (51) provided in a gap between the core (21) and the winding (22) on the cooling member (4) side. The reactor cooling structure according to claim 4.
  6. The thermal resistance reducing member (5) is a second thermal resistance provided in a gap between the core (21) and the winding (22) in a portion different from the first thermal resistance reducing member (51). A reduction member (52),
    The reactor cooling structure according to claim 5, wherein the heat dissipation performance of the first thermal resistance reduction member (51) is higher than the heat dissipation performance of the second thermal resistance reduction member (52).
  7. The pressing portion (3) includes a screw (31),
    The reactor cooling according to any one of claims 1 to 6, wherein the core (21) is pressed against the cooling member (4) side by fastening the screw (31). Construction.
  8. The pressing portion (3) includes a mounting plate (32) provided on the opposite side of the cooling member (4) with respect to the core (21).
    The reactor cooling structure according to claim 7, wherein the mounting plate (32) is configured to push the core (21) toward the cooling member (4) when the screw (31) is fastened.
  9. The pressing portion (3) includes a coil bobbin (33) around which the winding (22) is wound and engaged with the core (21),
    The reactor cooling structure according to claim 7, wherein the coil bobbin (33) is configured to push the core (21) toward the cooling member (4) when the screw (31) is fastened.
  10. The screw (31) is inserted through a through hole provided in the core (21),
    The reactor cooling structure according to claim 7, wherein the screw (31) is configured to push the core (21) toward the cooling member (4) when the screw (31) is fastened.
  11. The reactor (2) is mounted on a printed wiring board (8) together with a power device (7), and the reactor (2) and the power device (7) are cooled by one cooling member (4). The reactor cooling structure according to any one of claims 1 to 10.
JP2014265976A 2014-12-26 2014-12-26 Reactor cooling structure Pending JP2016127109A (en)

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5210513A (en) * 1992-03-20 1993-05-11 General Motors Corporation Cooling of electromagnetic apparatus
JPH10289825A (en) * 1997-04-14 1998-10-27 Fuji Electric Co Ltd Static induction electric equipment
JP2001015350A (en) * 1999-04-27 2001-01-19 Tdk Corp Coil device
US20060082945A1 (en) * 2004-10-19 2006-04-20 Walz Andrew A Modular heatsink, electromagnetic device incorporating a modular heatsink and method of cooling an electromagnetic device using a modular heatsink
JP2008210976A (en) * 2007-02-26 2008-09-11 Toyota Industries Corp Reactor device
JP2008216405A (en) * 2007-03-01 2008-09-18 Matsushita Electric Ind Co Ltd Plasma display device
JP2009194198A (en) * 2008-02-15 2009-08-27 Sumitomo Electric Ind Ltd Reactor
WO2012137494A1 (en) * 2011-04-06 2012-10-11 株式会社神戸製鋼所 Reactor and method of evaluating same
US20140184375A1 (en) * 2011-07-20 2014-07-03 Toyota Jidosha Kabushiki Kaisha Reactor
JP2014160737A (en) * 2013-02-19 2014-09-04 Tdk Corp Coil device

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5210513A (en) * 1992-03-20 1993-05-11 General Motors Corporation Cooling of electromagnetic apparatus
JPH10289825A (en) * 1997-04-14 1998-10-27 Fuji Electric Co Ltd Static induction electric equipment
JP2001015350A (en) * 1999-04-27 2001-01-19 Tdk Corp Coil device
US20060082945A1 (en) * 2004-10-19 2006-04-20 Walz Andrew A Modular heatsink, electromagnetic device incorporating a modular heatsink and method of cooling an electromagnetic device using a modular heatsink
JP2008210976A (en) * 2007-02-26 2008-09-11 Toyota Industries Corp Reactor device
JP2008216405A (en) * 2007-03-01 2008-09-18 Matsushita Electric Ind Co Ltd Plasma display device
JP2009194198A (en) * 2008-02-15 2009-08-27 Sumitomo Electric Ind Ltd Reactor
WO2012137494A1 (en) * 2011-04-06 2012-10-11 株式会社神戸製鋼所 Reactor and method of evaluating same
US20140184375A1 (en) * 2011-07-20 2014-07-03 Toyota Jidosha Kabushiki Kaisha Reactor
JP2014160737A (en) * 2013-02-19 2014-09-04 Tdk Corp Coil device

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