reactor

Abstract

To provide a reactor capable of efficiently cooling a bus bar electrically connected to a coil, even in a structure that a coil is potted by a resin in a container.SOLUTION: A reactor 1 where a coil 3 is potted in a container 2 having a bottom surface with which a coolant R is brought into contact includes: a bus bar 4 joined to the coil 3 in a current carrying manner; and an insulation heat dissipation sheet 5d (connection part) which shield electricity between the bus bar 4 and the container 2, and connects the bus bar 4 and the container 2 so as to freely transmit heat therebetween.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a reactor. [Background technology]

[0002] Conventionally, an electronic conversion device has been known in which a cylindrical cooling terminal is provided on a terminal block arranged inside a housing (see, for example, Patent Document 1). Specifically, in this electronic conversion device, a bus bar is electrically connected to the upper end of the cooling terminal, and the lower end is thermally connected to a cooling mechanism arranged at the bottom of the housing. According to such an electronic conversion device, Joule heat generated in the bus bar can be transferred to the cooling mechanism at the bottom of the housing via the cooling terminal.

[0003] Incidentally, electric vehicles and HEVs (Hybrid Electrical Vehicles) are equipped with a power conversion device that converts power between, for example, a battery and a motor. Such a power conversion device includes an intelligent power module, a capacitor, a DC-DC converter, a reactor, and the like. A reactor is constructed by potting a coil made of wire wound around a core in a specified container with resin. The ends of the coil are connected to bus bars, which generate Joule heat. Therefore, it is desirable to cool the bus bars in a reactor. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6233541 Summary of the Invention [Problem to be solved by the invention]

[0005] However, most of the space inside the reactor's container is occupied by the coil potted with resin, which makes it difficult to apply a terminal block with a conventional cooling terminal (see, for example, Patent Document 1) to the reactor's bus bar to cool it.

[0006] An object of the present invention is to provide a reactor that can efficiently cool bus bars electrically connected to a coil even when the coil is potted with resin inside a container. [Means for solving the problem]

[0007] The present invention provides a reactor in which a coil is potted in a container having a bottom surface that comes into contact with a refrigerant, the reactor comprising: a bus bar joined to the coil so as to be electrically conductive; and a connecting portion that electrically isolates the bus bar from the container and connects them so as to be heat transferable. a terminal block for a bus bar adjacent to the outside of the container, the connecting portion being disposed on the terminal block, the connecting portion being an insulating heat dissipation sheet, the insulating heat dissipation sheet being interposed between the bus bar and the container, and a heat conduction member being disposed between the bus bar and the insulating heat dissipation sheet. It is characterized by: The present invention also provides a reactor in which a coil is potted in a container having a bottom surface that comes into contact with a refrigerant, the reactor comprising: a bus bar joined to the coil so that electricity can be passed therethrough; and a connecting portion that electrically isolates the bus bar from the container and connects them so that heat can be transferred freely; a terminal block for the bus bar adjacent to the outside of the container, the connecting portion being arranged on the terminal block, the connecting portion being an insulating heat dissipation sheet that is interposed between the bus bar and the container, and the insulating heat dissipation sheet being interposed between the bus bar and the container and a side wall of the container. [Effects of the Invention]

[0008] According to the reactor of the present invention, even if the coil is configured to be potted with resin inside the container, the bus bar electrically connected to the coil can be efficiently cooled. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is an overall perspective view of a reactor according to a first embodiment of the present invention; [Figure 2] 2 is an enlarged cross-sectional view of a portion II-II of FIG. 1 taken along the cooling terminal block side. [Figure 3A] FIG. 6 is a partially enlarged perspective view of a reactor according to a second embodiment of the present invention. [Figure 3B] FIG. 3B is a cross-sectional view taken along line IIIB-IIIB of FIG. 3A. [Figure 4A] FIG. 10 is a partially enlarged perspective view of a reactor according to a third embodiment of the present invention. [Figure 4B]4B is a cross-sectional view of FIG. 4A taken along line IVB-IVB. DETAILED DESCRIPTION OF THE INVENTION

[0010] Next, a mode (embodiment) for carrying out a reactor of the present invention will be described in detail with reference to the drawings as appropriate. In the following, the present invention will be described using as an example a reactor that constitutes a power conversion device that is mounted on an electric vehicle, a hybrid electric vehicle (HEV), a fuel cell vehicle, etc. and is arranged between a load such as a motor and a battery, but the present invention is not limited to this. The reactor of this embodiment has a configuration in which a cooling terminal block for a bus bar is provided adjacent to the outside of a container in which a coil is potted with resin.

[0011] (First embodiment) Fig. 1 is an overall perspective view of a reactor 1A according to a first embodiment of the present invention, Fig. 2 is an enlarged cross-sectional view of a portion II-II of Fig. 1 on the cooling terminal block 5 side. In the following description, the up-down direction is based on the up-down direction shown in FIG. 1, which corresponds to the up-down direction when the reactor 1A is mounted in a power converter (not shown).

[0012] As shown in Fig. 1, reactor 1A includes a container 2, a coil 3, a bus bar 4, and a cooling terminal block 5. In this embodiment, cooling terminal block 5 also serves as a power terminal that electrically connects bus bar 4 to a bus bar (not shown) that is electrically connected to a motor side or a battery side (not shown). Cooling terminal block 5 corresponds to the "terminal block" referred to in the claims.

[0013] 1, the container 2 is configured as a box member having a substantially rectangular parallelepiped shape. Specifically, the container 2 has a container body 7 having an opening 7a that is substantially rectangular in plan view, and a cover member 8 that partially covers the opening 7a. 1, the container body 7 in this embodiment has a rectangular bottom plate 7b, two side plates 7c rising from the two long sides of the bottom plate 7b, and two side plates 7d rising from the two short sides of the bottom plate 7b. The container body 7 in this embodiment is assumed to be a die-cast product made of an aluminum alloy, but is not limited to this.

[0014] An attachment portion 7e for a second cover member 8b (described later) is formed on one end of the side plate 7c in the longitudinal direction (the direction in which the long side of the bottom plate 7b extends), closer to the bottom plate 7b. This attachment portion 7e is formed in a pedestal shape at the lower end of one end of the side plate 7c, partially projecting in a direction away from the side plate 7c.

[0015] Of the pair of opposing side plates 7d, the side plate 7d arranged on the other longitudinal end side of the side plate 7c is formed with a mounting portion 7f for a cooling terminal block 5, which will be described later. This mounting portion 7f will be described in detail later together with the cooling terminal block 5.

[0016] As shown in FIG. 2, a plurality of cooling fins 7b1 are provided upright on the lower surface of the bottom plate 7b. The lower surface of the bottom plate 7b is adapted to come into contact with the refrigerant R flowing through a predetermined refrigerant chamber 9 indicated by an imaginary line (two-dot chain line) provided in the lower part of the container body 7. The lower surface of the bottom plate 7b corresponds to the "bottom surface" of the container 2 with which the refrigerant R comes into contact. Incidentally, the coolant R in this embodiment is assumed to be cooling water circulated by a pump (not shown) through an annular flow path that includes the coolant chamber 9 midway through the flow path, but is not limited to this.

[0017] 1, the cover member 8 is configured to include a first cover member 8a and a second cover member 8b. The first cover member 8a and the second cover member 8b are formed of an electrically insulating synthetic resin. The first cover member 8a is formed of a substantially rectangular plate body that is disposed so as to straddle the upper end edges of the pair of side plates 7c and 7d near the attachment portion 7f. The first cover member 8a has a plurality of openings 8a1 that allow the inside and outside of the container 2 to communicate with each other. The first cover member 8a is fixed to the upper end of the side plate 7c of the container body 7.

[0018] The second cover member 8b is configured as a plate body whose cross section is bent in a hat shape. The second cover member 8b is arranged along the upper edge of the side plate 7d opposite to the side plate 7d on which the first cover member 8a is arranged. A top plate portion 8b1 corresponding to the top surface of the hat shape of the second cover member 8b is disposed at a predetermined distance from the first cover member 8a and is fixed to the upper end of the side plate 7d. Additionally, a flange portion 8b2 corresponding to the hat-shaped flange portion of the second cover member 8b is fixed to the attachment portion 7e.

[0019] The coil 3 (see Figure 1) has a cylindrical shape, with the outer surface of a core 3b (see Figure 2) made of an iron core or the like with an insulating surface being wound spirally with a winding 3a with an insulating surface. 1, the reactor 1A of this embodiment has two coils 3. The coils 3 are arranged side by side between a pair of side plates 7c. That is, the coils 3 are housed in the container 2 so that the ends of the coils 3 in the central axis direction face the side plate 7d.

[0020] 2, the coil 3 is potted with resin 6 inside the container 2. As a result, at least the lower half of the coil 3 inside the container 2 is filled with resin 6. The resin in this embodiment is assumed to be a thermosetting resin such as a heat-resistant epoxy resin.

[0021] After the coil 3 is placed in the container 2, the coil 3 is fixed to the container 2 by hardening the unhardened resin poured into the container 2. The ends of the windings 3 a that form the coil 3 are drawn upward from the end of the coil 3 in the central axis direction and are electrically connected to a bus bar 4 outside the container 2 .

[0022] Returning to FIG. 1, two bus bars 4 are arranged along the lateral direction of the side plate 7d of the container body 7 so as to correspond to the two coils 3. As shown in FIG. 1, the bus bar 4 in this embodiment is formed of a copper plate bent into a crank shape. Specifically, as shown in Fig. 2, the bus bar 4 has a coil connection portion 4a connected to the winding 3a drawn out from the coil 3, a supported portion 4b supported on the container 2 side via a cooling terminal block 5, and an intermediate portion 4c connecting the coil connection portion 4a and the supported portion 4b. In Fig. 2, reference numeral 8a denotes a first cover member.

[0023] 1, the cooling terminal block 5 has two busbar support portions 5a provided to correspond to the two busbars 4, and a plate-shaped base portion 5b that integrally joins the lower ends of the busbar support portions 5a. As shown in FIG. 2, the cooling terminal block 5 further has a collar member 5c made of copper and an insulating heat dissipation sheet 5d. The collar member 5c corresponds to the "thermal conductive member" in the claims, and the insulating heat dissipation sheet 5d corresponds to the "connecting portion" in the claims.

[0024] Returning to FIG. 1, the mounting portion 7f of the cooling terminal block 5 will be described first. The mounting portion 7f of the container body 7 is formed in a pedestal shape that protrudes from the lower end of the side plate 7d in a direction away from the side plate 7d with a width substantially equal to that of the side plate 7d. Specifically, the mounting portion 7f is a substantially rectangular parallelepiped block body that is molded integrally with the side plate 7d. The base portion 5b constituting the cooling terminal block 5 is made up of a rectangular plate having the same planar shape as the mounting portion 7f. The base portion 5b is fastened to the mounting portion 7f with bolts B at multiple locations.

[0025] As shown in FIG. 2, the bus bar support portion 5a constituting the cooling terminal block 5 is formed in a cylindrical shape. A cylindrical collar member 5c (heat conduction member) is fixed in a central hole 5a1 that communicates with the top and bottom of the bus bar support portion 5a. The collar member 5c has a threaded portion with which the bolt B engages. The supported portion 4b of the bus bar 4 is connected by a bolt B to the upper end surface of the collar member 5c. The lower end surface of the collar member 5c is thermally connected to the attachment portion 7f of the container body 7 with an insulating heat dissipation sheet 5d sandwiched therebetween.

[0026] The insulating heat dissipating sheet 5d (connecting portion) electrically isolates the bus bar 4 from the container 2 and connects them so as to allow free heat transfer. In this embodiment, the insulating and heat-dissipating sheet 5d is assumed to be made of a thermosetting resin having electrical insulating properties and heat resistance.

[0027] Examples of such thermosetting resins include epoxy resins, cyanate resins, benzoxazine resins, unsaturated polyester resins, phenolic resins, melamine resins, silicone resins, maleimide resins, acrylic resins, and polyamide resins. Furthermore, the insulating and heat-dissipating sheet 5d can further contain a thermally conductive filler. Examples of the thermally conductive filler include silicon oxide, aluminum oxide, boron nitride, silicon nitride, and aluminum nitride.

[0028] <Action and effect> Next, the effects and advantages of the reactor 1A (see FIG. 2) according to the first embodiment will be described. The reactor 1A of this embodiment has a coil 3 potted in a container 2 having a bottom surface that comes into contact with the refrigerant R, a bus bar 4 joined to the coil 3 so that electricity can flow therethrough, and an insulating heat dissipation sheet 5d (connecting portion) that electrically isolates the bus bar 4 from the container 2 and connects them so that heat can be freely transferred between them. According to such reactor 1A, even if coil 3 is configured to be potted with resin 6 inside container 2, Joule heat generated in bus bar 4 can be efficiently transferred to container 2. Reactor 1A can efficiently cool bus bar 4 while preventing electric leakage to container 2.

[0029] In addition, in this reactor 1A, a cooling fin 7b1 is formed on the bottom surface of the container 2. According to such a reactor 1A, the container 2 itself serves as a heat sink, and the bus bar 4 can be cooled more efficiently.

[0030] Furthermore, this reactor 1A includes a cooling terminal block 5 (terminal block) for the adjacent bus bar 4 on the outside of the container 2, and the insulating heat dissipation sheet 5d (connecting portion) is disposed on the cooling terminal block 5 (terminal block). According to such a reactor 1A, the power terminal block (not shown) for connecting to the motor side or the battery side and the cooling terminal block 5 can be integrated, thereby achieving a compact reactor 1A.

[0031] In this reactor 1A, an insulating heat dissipation sheet 5d is interposed between the bus bar 4 and the container 2. According to such reactor 1A, by interposing insulating heat dissipation sheet 5d, good heat transfer between bus bar 4 and container 2 can be maintained, and current leakage to container 2 can be reliably prevented.

[0032] In addition, in this reactor 1A, a collar member 5c (heat conduction member) made of copper is disposed between the bus bar 4 and the insulating heat dissipation sheet 5d. According to such a reactor 1A, a distance can be secured between the bus bar 4 and the insulating heat dissipation sheet 5d, and the degree of freedom in designing the cooling terminal block 5 is improved.

[0033] (Second embodiment) Fig. 3A is a partially enlarged perspective view of a reactor 1B according to a second embodiment of the present invention. Fig. 3A is a partially enlarged perspective view of a cooling terminal block 5 attached to a side plate 7d of a container 2 (container body 7). Fig. 3B is a cross-sectional view taken along IIIB-IIIB in Fig. 3A. In this second embodiment, the same components as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

[0034] As shown in FIG. 3A, in a reactor 1B according to the second embodiment, the cooling terminal block 5 of the bus bar 4 is attached to a side plate 7d that forms a side wall of the container 2. The cooling terminal block 5 in this embodiment includes an insulating heat dissipation sheet 5d, an insulating heat dissipation sheet 5e, and a leaf spring 11. In FIG. 3A, reference numeral 3 denotes a coil that can be seen facing the opening 8a1 of the cover member 8, and reference numeral 4 denotes a bus bar. In this embodiment, there are two coils 3 and two bus bars 4, similar to the coils 3 (see Figure 1) and bus bars 4 (see Figure 1) in the first embodiment, but in Figure 3A, for convenience of drawing, one coil 3 and one bus bar 4 are omitted.

[0035] The bus bar 4 in this embodiment is formed of a copper plate bent into a crank shape, similar to the bus bar 4 in the first embodiment (see FIG. 2). 3B, the bus bar 4 in this embodiment has a coil connection portion 4a connected to the winding 3a drawn out from the coil 3, a supported portion 4b supported on the container 2 side, and an extending portion 4d extending in a direction away from the side plate 7d. Note that, although the extending portion 4d in this embodiment is intended to be connected to a power terminal block (not shown), if the cooling terminal block 5 also serves as the power terminal block, the extending portion 4d can be omitted.

[0036] 3B, in the cooling terminal block 5 of this embodiment, the insulating heat dissipation sheet 5d (connecting portion) is interposed between the bus bar 4 (supported portion 4b) and the side plate 7d of the container 2 (container body 7). Specifically, the side plate 7d forming the side wall of the container 2 is in contact with the insulating heat dissipation sheet 5d, and the insulating heat dissipation sheet 5d is also in contact with the bus bar 4 (supported portion 4b).

[0037] 3A, leaf spring 11 is formed as a laterally long, bent plate. Specifically, leaf spring 11 has a flat surface facing side plate 7d, a U-shaped protrusion 11a protruding toward side plate 7d, and fixing portions 11b formed on both longitudinal ends of protrusion 11a.

[0038] When the fixed portions 11b at both ends of the leaf spring 11 are fastened to the side plate 7d with bolts B, the convex portions 11a press the bus bar 4 (supported portion 4b) toward the side plate 7d of the container 2 via the insulating heat dissipation sheet 5e. The leaf spring 11 corresponds to the "biasing means" in the claims.

[0039] As shown in FIG. 3B, the leaf spring 11 presses the insulating heat dissipation sheet 5e, the bus bar 4 (supported portion 4b), and the insulating heat dissipation sheet 5d (connecting portion) toward the side plate 7d, thereby supporting them together on the container 2. In FIG. 3B, symbol 3b denotes the core of the coil 3, symbol 6 denotes resin, symbol 7b1 denotes a cooling fin provided on the lower surface (bottom surface) of the bottom plate 7b of the container body 7, and symbol R denotes the refrigerant flowing through the refrigerant chamber 9.

[0040] <Action and effect> Next, the effects of the reactor 1B (see FIG. 3B) according to the second embodiment will be described. In the reactor 1B according to the second embodiment, an insulating heat dissipation sheet 5d (connecting portion) is interposed between the bus bar 4 and a side plate 7d which is a side wall of the container 2. According to such a reactor 1B, the insulating heat dissipation sheet 5d (connecting portion) can be disposed in proximity to the container 2. This allows the cooling terminal block 5 of the reactor 1B to have a simpler configuration, thereby achieving further downsizing of the reactor 1B.

[0041] In reactor 1B, side plate 7d, which is a side wall of container 2, is in contact with insulating heat dissipation sheet 5d (connecting portion), and insulating heat dissipation sheet 5d (connecting portion) is in contact with bus bar 4. Reactor 1B has leaf spring 11 (urging means) that presses bus bar 4 toward side plate 7d, which is a side wall of the container. According to such a reactor 1B, the Joule heat generated in the bus bar 4 can be more efficiently transferred to the container 2. According to the reactor 1B, the cooling efficiency of the bus bar 4 is further improved.

[0042] In reactor 1B, plate spring 11 (biasing means) is fixed to side plate 7d, which is the side wall of container 2. According to such reactor 1B, Joule heat generated in busbar 4 is transferred to side plate 7d, which is the side wall of container 2, via insulating heat dissipation sheet 5e and leaf spring 11. According to reactor 1B, Joule heat generated in busbar 4 can be transferred to container 2 more efficiently.

[0043] (Third embodiment) Fig. 4A is a partially enlarged perspective view of a reactor 1C according to a third embodiment of the present invention. Fig. 4B is a cross-sectional view taken along line IVB-IVB of Fig. 4A. In this third embodiment, the same components as those in the first and second embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0044] As shown in FIG. 4A, in the reactor 1C according to the third embodiment, similar to the reactor 1A according to the first embodiment (see FIG. 1), two bus bars 4 are arranged along the lateral direction of the side plate 7d of the container body 7 so as to correspond to two coils (not shown). 4B, the bus bar 4 in this embodiment has a coil connection portion 4a connected to the winding 3a drawn out from the coil 3, a supported portion 4b supported on the container 2 side, and an intermediate portion 4c connecting the coil connection portion 4a and the supported portion 4b. In FIG. 2, reference numeral 8a denotes a first cover member.

[0045] Returning to Figure 4A, the cooling terminal block 5 in this embodiment is configured to have two busbar support portions 5a corresponding to the two busbars 4, a plate-shaped base portion 5b that joins the lower ends of these busbar support portions 5a together, and an insulating heat dissipation sheet 5d (connecting portion). 4A, reference numeral 8a denotes a first cover member, and reference numeral 7f denotes a mounting portion to which the base portion 5b is fastened by a bolt B.

[0046] As shown in FIG. 4B, in the cooling terminal block 5 of this embodiment, the insulating heat dissipation sheet 5d (connecting portion) is interposed between the bus bar 4 (middle portion 4c) and the side plate 7d of the container 2 (container body 7). Specifically, the insulating heat dissipation sheet 5d is in contact with an inclined surface 7d3 formed on the protruding portion 7d2 of the side plate 7d, and the bus bar 4 (middle portion 4c) is in contact with the insulating heat dissipation sheet 5d. As shown in FIG. 4A, the protruding portion 7d2 is formed in the shape of a rail extending in the vertical direction and protruding outward from the container 2 beyond the general surface Gs of the side plate 7d. As shown in FIG. 4B, the inclined surface 7d3 has a surface that gradually displaces downward on the side plate 7d that is the side wall of the container 2, so as to move away from the container 2 toward the outside. 4B, reference numeral 3b denotes the core of the coil 3, reference numeral 6 denotes resin, reference numeral 7b1 denotes cooling fins provided on the lower surface (bottom surface) of the bottom plate 7b of the container body 7, and reference numeral R denotes the refrigerant flowing through the refrigerant chamber 9. Reference numeral 7f denotes an attachment portion to which the base portion 5b (see FIG. 4A) is fastened.

[0047] <Action and effect> Next, the effects of the reactor 1C (see FIG. 4B) according to the third embodiment will be described. In the reactor 1C of the third embodiment, the side plate 7d, which is the side wall of the container 2, has an inclined surface 7d3 that gradually displaces toward the outside of the container 2 as it extends downward, and the insulating heat dissipation sheet 5d (connecting portion) is provided on the inclined surface 7d3. With such a reactor 1C, the work of attaching the insulating heat dissipation sheet 5d (connecting portion) to the side plate 7d, which is the side wall of the container 2, is easier than when attaching the insulating heat dissipation sheet 5d (connecting portion) to, for example, a vertical wall of the container 2 (for example, the general surface Gs of the side plate 7d).

[0048] Furthermore, with this reactor 1C, it is possible to ensure a larger contact area between the insulating heat dissipation sheet 5d (connecting portion) and the side plate 7d of the container 2, compared to when the insulating heat dissipation sheet 5d (connecting portion) is attached to a vertical wall (for example, the general surface Gs of the side plate 7d) of the container 2. With the reactor 1B, it is possible to transfer Joule heat generated in the bus bar 4 to the container 2 more efficiently.

[0049] Although the present embodiment has been described above, the present invention is not limited to the above embodiment and can be embodied in various forms. In the first to third embodiments, the number of coils 3 is described as two, but the reactor of the present invention is not limited to this and the number of coils 3 can be reduced or increased depending on the application. Furthermore, in the first to third embodiments, only the terminal block (cooling terminal block 5) of the bus bar 4 connected to the winding 3a drawn out from one end side in the central axis direction of the coil 3 has been described, but it is also possible to configure the bus bar 4 to be provided with a terminal block (cooling terminal block 5) connected to the winding 3a drawn out from the other end side in the central axis direction of the coil 3 (not shown). [Explanation of symbols]

[0050] 1A reactor 1B Reactor 1C reactor 2 containers 3 coils 4 Busbars 5 Cooling terminal block (terminal block) 5c Color material (thermal conductive material) 5d Insulating heat dissipation sheet (connection part) 7b1 Cooling fin 7d Side plate (side wall) 7d3 Slope 11 Leaf spring (biasing means) R refrigerant

Claims

1. A reactor in which a coil is potted in a container having a bottom surface that contacts a refrigerant, a bus bar joined to the coil so as to be electrically conductive; a connecting portion that electrically isolates the bus bar from the container and connects the bus bar to the container so as to allow heat transfer therebetween; Equipped with a bus bar terminal block adjacent to the outside of the container; the coupling portion is disposed on the terminal block, the connecting portion is an insulating heat dissipation sheet, the insulating and heat-dissipating sheet is interposed between the bus bar and the container, A reactor characterized in that a heat conductive member is disposed between the bus bar and the insulating heat dissipation sheet.

2. A reactor in which a coil is potted in a container having a bottom surface that comes into contact with a refrigerant, a bus bar joined to the coil so as to be electrically conductive; a connecting portion that electrically isolates the bus bar from the container and connects the bus bar to the container so as to allow heat transfer therebetween; Equipped with a bus bar terminal block adjacent to the outside of the container; the coupling portion is disposed on the terminal block, the connecting portion is an insulating heat dissipation sheet, the insulating and heat-dissipating sheet is interposed between the bus bar and the container, The reactor is characterized in that the insulating heat dissipation sheet is interposed between the side wall of the container.

3. the side wall of the container and the insulating heat dissipation sheet are in contact with each other, and the insulating heat dissipation sheet and the bus bar are in contact with each other, 3. The reactor according to claim 2, further comprising a biasing means for pressing the bus bar toward the side wall of the container.

4. The side wall of the container has an inclined surface that gradually displaces away from the outside of the container as it extends downward, The reactor according to claim 2 , wherein the insulating heat dissipation sheet is provided on the inclined surface.

Images