JPWO2014147930A1 - Magnetic component mounting structure and power conversion device equipped with the mounting structure - Google Patents

Abstract

A magnetic component mounting structure that enables efficient thermal cooling of the magnetic component even when the heat generation amount of the magnetic component is large, and has improved the vibration resistance characteristics of the heavy magnetic component, and the mounting structure Provided is a power conversion device provided. In the mounting structure of the magnetic component (20), the heat conductive member between the heat conductive member (36) having elasticity and the upper surface of the magnetic member (20) disposed on the upper surface of the magnetic member (20). An attachment member (30) for fixing the magnetic component (20) to the housing (2) with the (36) sandwiched therebetween. The attachment member (30) includes a pressing portion (31) that presses the heat conductive member (36), and a bottom portion (7a) of the case (7) that extends downward from the pressing portion (31) and constitutes the housing (2). ) To the case attachment portion (32) for fixing the magnetic component (20) and the lid attachment portion (34) extending from the pressing portion (31) to fix the magnetic component (20) to the lid (10). ).

Description

  The present invention relates to a mounting structure for a magnetic component for fixing a magnetic component such as a transformer to a housing, and a power conversion device including the mounting structure.

In a power conversion device such as an AC / DC converter, a magnetic component such as a transformer is generally housed in a housing and the magnetic component is fixed to the housing. In the mounting structure of the magnetic component, since the magnetic component is a heating element, it is required that heat transfer and heat dissipation with respect to the housing of the magnetic component are good. Moreover, in the mounting structure of a magnetic component, since a magnetic component has a comparatively heavy weight, it is requested | required that the vibration resistance after fixing a magnetic component to a housing | casing is favorable.
Here, as a mounting structure for fixing a conventional transformer to a heat sink, for example, a structure shown in FIG. 8 is known (see Patent Document 1). FIG. 8 is a schematic perspective view showing an example of a conventional transformer mounting structure.

In the transformer mounting structure shown in FIG. 8, the transformer 101 is fixed to the heat sink 110 by the mounting plate 105.
Here, the transformer 101 includes a primary side winding 102, a secondary side winding 103, and a core 104, and a high voltage (for example, DC 200 to 300V) is applied to a primary side from a battery (not shown). The high voltage is stepped down and output to the secondary side.
When the transformer 101 is fixed to the heat sink 110, the heat dissipation rubber 102 is sandwiched between the upper surface of the core 104 of the transformer 101 and the mounting plate 105 and the transformer 101 is fixed to the heat sink 110.

The mounting plate 105 includes a rectangular flat plate-shaped pressing portion 106 that presses the heat-dissipating rubber 102, a pair of bent portions 107 bent downward from side edges on both long sides of the pressing portion 106, and both short sides of the pressing portion 106. And a pair of legs 108 bent downward from the side edge. The mounting plate 105 is formed by punching and bending a metal plate having thermal conductivity such as soft iron. Each bent portion 107 functions as a deformation amount limiting portion of the heat radiation rubber 102 and has a step that is lower than the height of the heat radiation rubber 102 (height with respect to the upper surface of the core 104). For this reason, in a state where the mounting plate 105 is fixed to the heat sink 110, the heat radiation rubber 102 is compressed by the mounting plate 105. Each leg portion 108 fixes the attachment plate 105 to the heat sink 110, and has a curved portion 108a at a substantially central portion in the vertical direction and an attachment portion 108b bent at the lower end by 90 degrees. A through hole (not shown) is formed in the mounting portion 108b, and a mounting screw 109 is inserted into the through hole so that the mounting portion 108b is screwed to a protrusion 111 formed on the heat sink 110. .
When the transformer 101 generates heat, the heat is directly transferred from the lower surface of the core 104 of the transformer 101 to the heat sink 110 and then radiated. Further, the heat generated when the transformer 101 generates heat is transferred from the upper surface of the core 104 in the order of the heat radiating rubber 102, the mounting plate 105, and the heat sink 110 as a separate path, and then radiated. Thereby, the transformer 101 is cooled.

JP 2007-305809 A

However, the conventional transformer mounting structure shown in FIG. 8 has the following problems.
That is, the heat transfer path from the transformer 101 directly transfers heat from the lower surface of the core 104 to the heat sink 110, and the path of heat transfer from the upper surface of the core 104 in the order of the heat radiation rubber 102, the mounting plate 105, and the heat sink 110. Limited to two paths and has a small total heat transfer area. For this reason, when the heat_generation | fever amount of the transformer 110 is large, there existed a subject that the efficient thermal cooling of the transformer 110 could not be performed.

Further, the transformer 101 which is a heavy object is fixed to the heat sink 110 by a pair of leg portions 108 bent downward from the side edges on both short sides of the pressing portion 106 constituting the mounting plate 105. Therefore, the lower side of the fixed transformer 101 is relatively difficult to move, but the upper side of the transformer 101 is relatively easy to move. For this reason, when the transformer 101 sways in the front-rear and left-right directions (the direction in which the long side of the mounting plate 105 extends and the direction in which the short side extends), the upper portion of the transformer 101 may vibrate and durability may not be ensured. .
Accordingly, the present invention has been made to solve these problems, and the object thereof is to enable efficient thermal cooling of the magnetic component even when the heat generation amount of the magnetic component is large, An object of the present invention is to provide a magnetic component mounting structure with improved vibration resistance characteristics of the magnetic component and a power conversion device including the mounting structure.

  In order to achieve the above object, a magnetic component mounting structure according to an aspect of the present invention is a magnetic component mounting structure for fixing a magnetic component to a housing, wherein the housing includes the magnetic component. An elastic structure disposed on the top surface of the magnetic member in a mounting structure of a magnetic component including a case with a bottomed box shape to be accommodated and a lid fixed to the case and closing an upper opening of the case. And a mounting member that fixes the magnetic component to the housing in a state where the thermal conductive member is sandwiched between the upper surface of the magnetic member, and the mounting member includes the thermal member. A pressing portion that presses the conductive member; a case mounting portion that extends downward from the pressing portion and fixes the magnetic component to the bottom of the case; and extends from the pressing portion, and the magnetic component is attached to the lid. The lid mounting part for fixing It is characterized by being composed of a metallic member.

According to this magnetic component mounting structure, the heat generated in the magnetic component is transferred to the housing through the following three paths (1), (2), and (3), and then dissipated. Since the heat transfer path to the body increases and the heat transfer area increases, the magnetic component can be efficiently cooled even when the heat generation amount of the magnetic component is large.
(1) Heat generation of the magnetic component by attaching the case attachment portion of the attachment member to the bottom portion of the case constituting the housing with the heat conductive member sandwiched between the lower surface of the pressing portion and the upper surface of the magnetic member Is directly transferred from the lower surface of the magnetic member to the bottom of the case, and is dissipated.
(2) By attaching the case mounting portion of the mounting member to the bottom of the case constituting the housing with the heat conductive member sandwiched between the lower surface of the pressing portion and the upper surface of the magnetic member, Is transferred from the top surface of the magnetic member in the order of the heat conductive member, the pressing portion of the mounting member, the case mounting portion, and the bottom portion of the case, and then radiated.
(3) Further, by attaching the lid attachment portion of the attachment member to the lid constituting the casing, the heat generation of the magnetic component is caused by the heat conductive member, the pressing portion of the attachment member, the lid from the upper surface of the magnetic component. Heat is transferred in the order of the mounting portion and the lid, and then radiated.

In addition, by attaching the case attachment portion of the attachment member to the bottom of the case constituting the housing with the heat conductive member sandwiched between the lower surface of the pressing portion and the upper surface of the magnetic member, As a result, the upper side of the magnetic component can be prevented from being shaken by attaching the lid attachment portion of the attachment member to the lid constituting the housing. Thereby, the vibration-resistant characteristic of the magnetic component which is a heavy article can be improved.
Further, in this magnetic component mounting structure, the pressing portion constituting the mounting member is configured by a substantially rectangular flat plate, and the case mounting portion is formed from one side of the pressing portion and one side facing the one side. Each of the lid attachment portions is composed of a pair of legs extending downward, and the lid mounting portion is composed of a pair of arms extending respectively from the other piece orthogonal to the one side of the pressing portion and the opposing other piece facing the other piece. preferable.

  According to this structure for mounting a magnetic component, after the magnetic component is fixed to the housing by the mounting member, the vibration of the magnetic component in the direction along one side of the pressing portion constituting the mounting member is mainly orthogonal to one side of the pressing portion. Of the magnetic component in a direction along the other piece perpendicular to one side of the pressing portion. The vibration can be suppressed mainly by the case mounting portion including a pair of leg portions extending downward from one side of the pressing portion and the opposite side facing the one side, thereby further improving the vibration resistance characteristics of the heavy magnetic component. be able to.

  Further, in this magnetic component mounting structure, each of the pair of leg portions includes a lower extension portion extending downward from one side of the pressing portion and an opposite side facing the one side, and a lower end of the lower extension portion. And a first screw mounting portion for fixing the magnetic component to the bottom portion of the case, and each of the pair of arm portions is another piece orthogonal to the one side of the pressing portion. And an outer extension portion extending outwardly from the opposing other piece facing the other piece at a height flush with the upper surface of the pressing portion, and the lid provided at the tip of the outer extension portion It is preferable to provide a second screw mounting portion for fixing the magnetic component to the body.

According to this magnetic component mounting structure, the case mounting portion of the mounting member can be mounted to the bottom of the case constituting the housing by screwing via the first screw mounting portion, and the lid of the mounting member The attachment portion can be attached to the lid constituting the housing by screwing via the second screw attachment portion.
Furthermore, in this magnetic component mounting structure, it is preferable that the second screw mounting portion be formed to be bent outward from the upper end of the rising portion raised from the tip of the outward extending portion.

According to this magnetic component mounting structure, even when the distance from the upper surface of the pressing portion constituting the mounting member to the lid is separated, the height of the upright portion, that is, the height of the pressing portion is flush with the outer side. By appropriately adjusting the height from the upper surface of the outwardly extending portion extending to the upper surface of the second screw mounting portion, the second screw mounting portion of the mounting member can be attached to the lid.
Further, in this magnetic component mounting structure, the second screw mounting portion may extend outward from the tip of the outward extending portion at a level flush with the upper surface of the pressing portion.
According to this magnetic component mounting structure, the upper surface of the second screw mounting portion, the upper surface of the outward extending portion, and the upper surface of the pressing portion are flush with each other, and the lid mounting portion of the mounting member is used as the lid. The heat transfer area when mounting can be increased.

  According to the magnetic component mounting structure and the power conversion device according to the present invention, the heat transfer path from the magnetic component to the housing is increased, and the heat transfer area is increased. The magnetic component can be efficiently cooled, and the vibration resistance characteristics of the heavy magnetic component can be improved.

It is a perspective view which shows the external appearance of the power converter device provided with the attachment structure of the transformer as a magnetic component based on this invention. It is sectional drawing shown by the AA arrow of FIG. It is the top view which removed the cover body of the power converter device shown in FIG. 1, and showed the inside. The attachment structure of the magnetic component which concerns on this invention is shown typically, (A) is a cross-sectional schematic diagram, (B) is a cross-sectional schematic diagram which follows the BB line in (A). However, in (A) and (B), the attachment member is not sectioned. It is a perspective view of an attachment member. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates a heat transfer path by a magnetic component mounting structure according to the present invention, in which (A) is a schematic cross-sectional view illustrating a heat transfer path to a case side constituting a housing, and (B) illustrates a housing. It is a cross-sectional schematic diagram explaining the heat-transfer path to the cover body side which comprises. It is a perspective view of the modification of an attachment member. It is a schematic perspective view which shows an example of the attachment structure of the conventional transformer.

DESCRIPTION OF EMBODIMENTS Hereinafter, modes for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing an external appearance of a power conversion device having a structure for mounting a transformer as a magnetic component according to the present invention. 2 is a cross-sectional view taken along line AA in FIG. FIG. 3 is a plan view showing the inside of the power conversion device shown in FIG. 1 with the lid removed.
A power conversion device 1 shown in FIG. 1 is an AC / DC converter, and is a rectangular parallelepiped housing 2, a blower fan 3 externally attached to one side surface in the longitudinal direction of the housing 2, and the length of the housing 2. An input connector 4, a control connector 5, and an output connector 6 provided on the other side surface in the scale direction are provided.

As shown in FIG. 2, the housing 2 is a bottomed box-shaped case 7 that is rectangular in plan view, and is disposed on one side in the longitudinal direction of the case 7, and between the short side wall 7 b of the case 7. A chamber forming wall 8 for providing a predetermined gap; a case cover 9 for covering part of the case 7 and the chamber forming wall 8; and a lid 10 for closing the upper opening of the case 7 and the chamber forming wall 8. Yes.
The case 7 is formed, for example, by injection-molding aluminum or aluminum alloy having high thermal conductivity. As shown in FIGS. 2 and 3, the case 7 has a rectangular bottom portion 7a and a pair of raised portions from the four sides of the bottom portion 7a. Short side walls 7b and 7c and a pair of long side walls 7d and 7e are provided.

On one long side wall 7e of the case 7, a plurality of side wall fins 12 (see FIG. 3) extending in the longitudinal direction are formed in parallel with a predetermined pitch in the vertical direction in a region from the lower end to the upper side of the outer side. Has been. In addition, a plurality of bottom fins 13 (see FIG. 2) extending in the longitudinal direction are parallel to the bottom portion 7a of the case 7 in the region from the left end portion in the short direction to the right side on the lower surface thereof at a predetermined pitch in the short direction. Is formed.
As shown in FIG. 3, the chamber forming wall 8 includes a contact wall 8a that contacts one short side wall 7b of the case 7 and an opposing wall 8b that faces one short side wall 7b. Yes.

As shown in FIGS. 1 to 3, the housing cover 9 rises from a rectangular plate-like bottom plate 9a covering the bottom 7a of the case 7 and the lower opening of the chamber forming wall 8, and an edge of the bottom plate 9a. The pair of long side walls 7d and 7e and the pair of side plates 9b and 9c covering the side portions of the chamber forming wall 8 are configured.
A space between the plurality of side wall fins 12 and a space between the plurality of bottom fins 13 are formed on the outer periphery of the bottom 7a of the case 7 and the one long side wall 7e covered with the housing cover 9. A plurality of flow paths extending in the direction are formed.

Then, the lid 10 is fixed to the case 7 and the chamber forming wall 8 by, for example, screwing so as to close the upper openings of the case 7 and the chamber forming wall 8. The lid 10 is a metal member. As a result, a space surrounded by one short side wall 7 b of the case 7, the chamber forming wall 8, the housing cover 9, and the lid body 10 is defined as the chamber 11.
One end in the longitudinal direction of a plurality of channels formed between the casing cover 9 and the outer periphery of the bottom 7a of the case 7 and one long side wall 7e communicates with the chamber 11, and the longitudinal direction of these channels The other end communicates with the atmosphere.
The blower fan 3 is mounted so that the blower opening corresponds to the opening 8 c formed in the facing wall 8 b of the chamber forming wall 8, and the cooling air generated by the blower fan 3 is sent into the chamber 11. .
A power conversion control unit and an internal fan 14 are accommodated in the case 7.

2 and 3, the power control unit includes a base substrate 15, an input side noise filter unit 16, a first reactor 17, a second reactor 18, an electric field capacitor group 19, a transformer 20 as a magnetic component, and an output side It is control parts, such as the noise filter part 21, several semiconductor devices (for example, MOS-FET) D1-D12, the 1st-3rd circuit boards 23-25.
The base substrate 15 has a predetermined wiring pattern (not shown) connected to the input connector 4, the control connector 5 and the output connector 6 described above, and has a rectangular shape smaller than the planar shape of the bottom 7a of the case 7, This is a member in which a notch 15a is formed on one long side. The base substrate 15 is fixed by bolting on a support base 26 formed on the upper surface of the bottom 7a of the case 7 with the notch 15a facing the one long side wall 7e of the case 7 (FIG. 2). reference).

Then, on the base substrate 15, the input side noise filter unit 16, the first reactor 17, the second reactor 18, the electric field capacitor group 19, the output side noise filter unit 21, the semiconductor devices D1 to D12, and the first to third circuit substrates 23. ~ 25 are implemented. An internal fan 14 is also disposed on the base substrate 15.
Further, as shown in FIGS. 2 and 3, a transformer 20 is disposed inside the notch 15 a of the base substrate 15, and this transformer 20 is a bottom portion of the case 7 constituting the housing 2 by the mounting member 30. It is directly fixed to 7a.

Here, the mounting structure of the transformer 20 will be specifically described with reference to FIGS. 4 and 5. 4A and 4B schematically show a structure for mounting a magnetic component according to the present invention. FIG. 4A is a schematic cross-sectional view, and FIG. 4B is a schematic cross-sectional view taken along line BB in FIG. FIG. 5 is a perspective view of the mounting member.
First, as shown in FIGS. 4A and 4B, a transformer 20 as a magnetic component includes a cylindrical ferrite core 20a and a bobbin 20c housed in a bobbin housing recess 20b formed in the ferrite core 20a. And a primary coil 20d and a secondary coil 20e wound around the bobbin 20c.
On the upper surface of the ferrite core 20a constituting the transformer 20, a silicone rubber 36 is disposed as a heat conductive member having elasticity. The silicone rubber 36 is formed in a disk shape having a predetermined thickness according to the shape of the upper surface of the ferrite core 20a. The heat conductive member having elasticity may be other than silicone rubber as long as it has elasticity and heat conductivity.

And the attachment member 30 is the case 7 which comprises the housing | casing 2 in the state which sandwiched the silicone rubber 36 between the upper surface of the ferrite core 20a of the transformer 20, and the lower surface of the said attachment member 30 (pressing part 31 mentioned later). The transformer 20 is fixed to the bottom 7a and the lid 10.
As shown in FIGS. 4 (A), 4 (B), and 5, the mounting member 30 includes a pressing portion 31 that presses the silicone rubber 36, and extends downward from the pressing portion 31. A case attaching portion 32 for fixing the transformer 20 and a lid attaching portion 34 extending from the pressing portion 31 for fixing the transformer 20 to the lid 10. The attachment member 30 is formed by punching and bending a metal plate.

And the press part 31 of the attachment member 30 is comprised by the substantially rectangular-shaped flat plate, and as shown to FIG. 4 (A) and FIG. 5, the case attachment part 32 is one side 31a of the press part 31, and the said one side 31a. It consists of a pair of leg part 33 respectively extended below from the opposing one side 31b which opposes. The lid attachment portion 34 includes a pair 31 of arms 31c extending from the other piece 31c orthogonal to the one side 31a of the pressing portion 31 and the opposite other piece 31d facing the other piece 31c.
Each of the pair of leg portions 33 constituting the case attachment portion 32 includes a lower extension portion 33a extending downward from the one side 31a of the pressing portion 31 and the opposite side 31b facing the one side 31a, and a lower extension portion. A first screw mounting portion 33b for fixing the transformer 20 to the bottom portion 7a of the case 7, which is bent outward from the lower end of the 33a, is provided. A plurality (two in this embodiment) of mounting screw through-holes 33c through which the mounting screws 37 are inserted are formed in the first screw mounting portion 33b.

  Each of the pair of arm portions 35 constituting the lid attachment portion 34 includes an upper surface of the pressing portion 31 from an other piece 31c orthogonal to the one side 31a of the pressing portion 31 and an opposing other piece 31d facing the other piece 31c. An outwardly extending portion 35a extending outwardly at the same height, and a second screw mounting portion 35c provided at the tip of the outwardly extending portion 35a for fixing the transformer 20 to the lid body 10; It has. And this 2nd screw attachment part 35c is bent outward from the upper end of the standing part 35b raised from the front-end | tip of the outward extension part 35a, and is formed. The first screw mounting portion 33b and the second screw mounting portion 35c extend in parallel to each other. The second screw attachment portion 35c is formed with a plurality (two in this embodiment) of female screw portions 35d to which the attachment screws 38 are screwed. The height of the upright portion 35b, that is, the height H from the upper surface of the outward extending portion 35a extending outwardly at the same level as the upper surface of the pressing portion 31 to the upper surface of the second screw mounting portion 35c is shown in FIG. As shown in 4 (B), the distance is adjusted to be the same as the distance from the upper surface of the pressing portion 31 to the lid 10.

  When the transformer 20 is fixed to the housing 2, first, the case mounting portion 32 of the mounting member 30 is placed between the lower surface of the pressing portion 31 and the upper surface of the ferrite core 20 a constituting the transformer 20. Is attached to the bottom 7a of the case 7 with an attachment screw 37. Specifically, as shown in FIG. 4A, the first screw mounting portion 33b is placed at the bottom of the case 7 with the silicone rubber 36 sandwiched between the lower surface of the pressing portion 31 and the upper surface of the ferrite core 20a. The mounting screw 37 is inserted into the mounting screw through hole 33c from above the first screw mounting portion 33b and screwed into the female screw portion 7f formed in the bottom portion 7a of the case 7. As a result, the case attachment portion 32 of the attachment member 30 is attached to the bottom portion 7 a of the case 7. In this state, since the silicone rubber 36 has elasticity, it is pressed and compressed by the pressing portion 31 of the mounting member 30.

Next, the lid body 10 is fixed to the case 7, and then the lid body attaching portion 34 of the attachment member 30 is attached to the lid body 10 fixed to the case 7. Specifically, as shown in FIG. 4B, after fixing the lid 10 to the case 7, the mounting screw 38 is inserted into the mounting screw through hole 10 a formed in the lid 10 from above the lid 10. It is inserted and screwed into the female screw portion 35d of the second screw attachment portion 35c. Thereby, the lid attachment portion 34 of the attachment member 30 is attached to the lid 10 fixed to the case 7.
In the power conversion device 1 in which the transformer 20 is fixed inside the case 7, when a control voltage is input to the control connector 5, the commercial power input through the input connector 4 is exchanged by the power conversion control unit housed in the case 7. To DC, and DC power is output from the output connector 6. At this time, the control components of the power conversion control unit of the case 7 generate heat, and in particular, the heat generation amount of the transformer 20 is large.

Here, according to the mounting structure of the transformer 20 as the magnetic component according to the present embodiment, as shown in FIGS. 6A and 6B, the heat generation of the transformer 20 is the following (1), (2), Heat is transferred to the housing 2 through the three paths (3) and then radiated. For this reason, the heat transfer path from the transformer 20 to the housing 2 (the bottom wall 7a of the case 7 and the lid body 10) is larger than the conventional transformer mounting structure shown in FIG. 8, and the heat transfer area is increased. Even when the heat generation amount of the transformer 20 is large, the transformer 20 can be efficiently cooled.
(1) First Path As shown in FIG. 6A, the silicone rubber 36 is disposed between the case mounting portion 32 of the mounting member 30 between the lower surface of the pressing portion 31 and the upper surface of the ferrite core 20a constituting the transformer 20. By attaching to the bottom portion 7a of the case 7 with the pinch in between, the heat generated by the transformer 20 is directly transferred from the lower surface of the ferrite core 20a to the bottom portion 7a of the case 7 as indicated by an arrow C, and then radiated.

(2) Second Path As shown in FIG. 6A, the case mounting portion 32 of the mounting member 30 is sandwiched between the lower surface of the pressing portion 31 and the upper surface of the ferrite core 20a. In this state, by attaching to the bottom 7a of the case 7, the heat generation of the transformer 20 is caused by the downward direction constituting the silicone rubber 36, the pressing portion 31 of the mounting member 30, and the case mounting portion 32 from the upper surface of the ferrite core 20a, as indicated by arrow D Heat is transferred in the order of the extension portion 33a, the first screw mounting portion 33b, and the bottom portion 7a of the case 7, and then is radiated.
(3) Third Path Further, as shown in FIG. 6 (B), by attaching the lid attachment portion 34 of the attachment member 30 to the lid 10, the heat generated by the transformer 20 is a ferrite indicated by an arrow E. From the upper surface of the core 20a, the silicone rubber 36, the pressing portion 31 of the mounting member 30, the outward extending portion 35a constituting the lid mounting portion 34, the standing portion 35b, the second screw mounting portion 35c, and the lid body 10 are transmitted in this order. Heated and dissipated.

Further, the case attachment portion 32 of the attachment member 30 is attached to the bottom portion 7a of the case 7 with the silicone rubber 36 sandwiched between the lower surface of the pressing portion 31 and the upper surface of the ferrite core 20a. The vibration on the side of the transformer 20 can be suppressed, and the vibration of the upper side of the transformer 20 can be suppressed by attaching the lid attachment portion 34 of the attachment member 30 to the lid 10. Thereby, the vibration-resistant characteristic of the transformer 20 which is a heavy object can be improved.
Further, in the mounting structure of the transformer 20, the pressing portion 31 is configured by a substantially rectangular flat plate, and the case mounting portion 32 is respectively downward from one side 31a of the pressing portion 31 and the opposite one side 31b facing the one side 31a. The lid attachment portion 34 includes a pair of arm portions 35 that respectively extend from the other piece 31c that is orthogonal to the one side 31a of the pressing portion 31 and the opposite other piece 31d that faces the other piece 31c. .

  Thereby, after the transformer 20 is fixed to the housing 2 by the mounting member 30, the swing of the transformer 20 in the direction along the one side 31 a of the pressing portion 31 constituting the mounting member 30 is mainly orthogonal to the one side 31 a of the pressing portion 31. The other piece 31c can be restrained by the lid mounting portion 34 including a pair of arm portions 35 extending from the other piece 31c facing the other piece 31c, and the other piece orthogonal to the one side 31a of the pressing portion 31. The vibration of the transformer 20 in the direction along 31c can be suppressed mainly by the case mounting portion 32 including a pair of leg portions 33 extending downward from one side 31a of the pressing portion 31 and the opposite side 31b facing the one side 31a. The vibration resistance characteristics of the transformer 20 that is a heavy object can be further improved.

Further, in the mounting structure of the transformer 20, each of the pair of leg portions 33 includes a lower extension portion 33a extending downward from one side 31a of the pressing portion 31 and an opposing side 31b facing the one side 31a, and a lower extension. A first screw mounting portion 33b for fixing the transformer 20 to the bottom portion 7a of the case 7, which is bent outward from the lower end of the portion 33a, is provided. For this reason, the case attachment portion 32 of the attachment member 30 can be attached to the bottom portion 7a of the case 7 by screwing via the first screw attachment portion 33b.
Each of the pair of arm portions 35 constituting the lid attachment portion 34 includes an upper surface of the pressing portion 31 from an other piece 31c orthogonal to the one side 31a of the pressing portion 31 and an opposing other piece 31d facing the other piece 31c. An outwardly extending portion 35a extending outwardly at the same height, and a second screw mounting portion 35c provided at the tip of the outwardly extending portion 35a for fixing the transformer 20 to the lid body 10; It has. For this reason, the lid attachment portion 34 of the attachment member 30 can be attached to the lid 10 by screwing via the second screw attachment portion 35c.

  Further, in the mounting structure of the transformer 20, the second screw mounting portion 35c is formed to be bent outward from the upper end of the standing portion 35b raised from the tip of the outward extending portion 35a. For this reason, even if the distance from the upper surface of the press part 31 which comprises the attachment member 30 to the cover body 10 is separated, it extends outward with the height of the standing part 35b, ie, the height flush with the press part 31. The second screw attachment portion 35c of the attachment member 30 can be attached to the lid body 10 by appropriately adjusting the height H from the upper surface of the outward extension portion 35a to the upper surface of the second screw attachment portion 35c.

Here, as in the modification of the attachment member 30 shown in FIG. 7, the second screw attachment portion 35c extends outward from the tip of the outward extension portion 35a at a height flush with the upper surface of the pressing portion 31. It may be. Thereby, the upper surface of the second screw attachment portion 35c, the upper surface of the outward extension portion 35a, and the upper surface of the pressing portion 31 are flush with each other, and the lid attachment portion 34 of the attachment member 30 is attached to the lid 10. The heat transfer area can be increased.
When the blower fan 3 is driven, cold air taken from outside is sent into the chamber 11. The cold air sent into the chamber 11 enters a plurality of flow paths formed on the bottom 7a side of the case 7 communicating with the chamber 11 and a plurality of flow paths formed on one long side wall 7e side, It flows toward the other end side in the scale direction (the other short side wall 7c side) and is discharged to the outside.
The bottom 7a of the case 7 becomes a cooling body by the cold air flowing through the plurality of flow paths formed on the bottom 7a side of the case 7. Therefore, the heat transferred from the transformer 20 to the bottom 7a of the case 7 is reliably cooled.

As mentioned above, although embodiment of this invention has been described, this invention is not limited to this, A various change and improvement can be performed.
For example, the magnetic component is not limited to the transformer 20, but may be a reactor or the like as long as it is a heavy object that generates heat.
The attachment member 30 includes a pressing portion 31 that presses the silicone rubber (an elastic conductive member) 36, and a case attachment that extends downward from the pressing portion 31 and fixes the transformer 20 to the bottom 7 a of the case 7. As long as it is made of a metal member that has a portion 32 and a lid attachment portion 34 that extends from the pressing portion 31 and fixes the transformer 20 to the lid 10, the shape shown in FIGS. 2 to 7 Not limited to.
Furthermore, the heat conductive member having elasticity is not limited to the silicone rubber 36, and any member having elasticity and heat conductivity may be used.

DESCRIPTION OF SYMBOLS 1 Power converter 2 Case 3 Blower fan 4 Input connector 5 Control connector 6 Output connector 7 Case 7a Bottom part 7b, 7c Short side wall 7d, 7e Long side wall 8 Chamber formation wall 8a Contact wall 8b Opposite wall 8c Opening part 9 Case cover 9a Bottom plate 9b, 9c Side plate 10 Lid 10a Mounting screw through hole 11 Chamber 12 Side wall fin 13 Bottom fin 14 Internal fan 15 Base substrate 15a Notch portion 16 Input side noise filter portion 17 First reactor 18 Second reactor 19 Electric field capacitor group 20 Transformer (magnetic component)
21 Output side noise filter part 23 1st circuit board 24 2nd circuit board 25 3rd circuit board 26 Support stand 30 Mounting member 31 Press part 31a One side 31b Opposing one side 31c Other side 31d Opposing other side 32 Case attaching part 33 Leg part 33a Lower extension portion 33b First screw attachment portion 33c Attachment screw through hole 34 Lid attachment portion 35 Arm portion 35a Outward extension portion 35b Standing portion 35c Second screw attachment portion 35d Female screw portion 36 Silicone rubber (heat having elasticity) Conductive member)
37 Mounting screw 38 Mounting screw D1 to D12 Semiconductor device

In order to achieve the above object, a magnetic component mounting structure according to an aspect of the present invention is a magnetic component mounting structure for fixing a magnetic component to a housing, wherein the housing includes the magnetic component. a bottomed box-shaped case for accommodating, is fixed to the case, in the magnetic parts of the mounting structure and a lid for closing the upper opening of the case is disposed on an upper surface of the magnetics, comprising a thermally conductive member having elasticity, and a mounting member for fixing the magnetic component on the housing in a state sandwiching the heat conductive member between the upper surface of the magnetics, the mounting member, A pressing portion that presses the thermally conductive member; a case mounting portion that extends downward from the pressing portion and fixes the magnetic component to the bottom portion of the case; and extends from the pressing portion; The lid mounting part for fixing the parts It is characterized by being composed of a metallic member.

According to this magnetic component mounting structure, the heat generated in the magnetic component is transferred to the housing through the following three paths (1), (2), and (3), and then dissipated. Since the heat transfer path to the body increases and the heat transfer area increases, the magnetic component can be efficiently cooled even when the heat generation amount of the magnetic component is large.
(1) the case mounting portion of the mounting member, by attaching to the bottom of the case constituting the housing in a state sandwiching the heat conductive member between the lower surface and the upper surface of the magnetics of the pressing portion, of a magnetic component heating is directly heat transfer from the lower surface of the magnetics to the bottom of the case, and is radiated.
(2) the case mounting portion of the mounting member, by attaching to the bottom of the case constituting the housing in a state sandwiching the heat conductive member between the lower surface and the upper surface of the magnetics of the pressing portion, of a magnetic component heating, the thermally conductive member from the upper surface of the magnetics, the pressing portion of the attachment member, the case mounting portion, and heat is transferred in the order of the bottom of the case, and is radiated.
(3) Further, by attaching the lid attachment portion of the attachment member to the lid constituting the casing, the heat generation of the magnetic component is caused by the heat conductive member, the pressing portion of the attachment member, the lid from the upper surface of the magnetic component. Heat is transferred in the order of the mounting portion and the lid, and then radiated.

Further, a case mounting portion of the mounting member, in a state sandwiching the heat conductive member between the lower surface and the upper surface of the magnetics of the pressing portion, by attaching the bottom of the case constituting the housing, the magnetic component The swinging of the lower side can be suppressed, and the swinging of the upper side of the magnetic component can be suppressed by attaching the lid mounting portion of the mounting member to the lid constituting the casing. Thereby, the vibration-resistant characteristic of the magnetic component which is a heavy article can be improved.
Further, in this magnetic component mounting structure, the pressing portion constituting the mounting member is configured by a substantially rectangular flat plate, and the case mounting portion is formed from one side of the pressing portion and one side facing the one side. a pair of leg portions extending downwardly, respectively, the cover mounting portion, be composed of a pair of arms each extending from the opposing other side to the other side and face the other side orthogonal to the side of the pressing portion preferable.

According to this structure for mounting a magnetic component, after the magnetic component is fixed to the housing by the mounting member, the vibration of the magnetic component in the direction along one side of the pressing portion constituting the mounting member is mainly orthogonal to one side of the pressing portion. other side and the other side opposite to the facing other side it can be suppressed by the lid mounting portion comprising a pair of arm portions extending respectively, also in the direction magnetic component along the other side orthogonal to the one side of the pressing portion of The vibration can be suppressed mainly by the case mounting portion including a pair of leg portions extending downward from one side of the pressing portion and the opposite side facing the one side, thereby further improving the vibration resistance characteristics of the heavy magnetic component. be able to.

Further, in this magnetic component mounting structure, each of the pair of leg portions includes a lower extension portion extending downward from one side of the pressing portion and an opposite side facing the one side, and a lower end of the lower extension portion. from bent outwardly, and a first screw attachment portion for securing the magnetic component at the bottom of the case, each of the pair of arms, the other side perpendicular to the side of the pressing portion the an outer extending portion extending outwardly from the other side opposite to the opposite other side with the upper surface and flush height of each of the pressing portion, provided at the tip of the outer side extension portion, the lid and It is preferable to provide a second screw mounting portion for fixing the magnetic component to the body.

And the press part 31 of the attachment member 30 is comprised by the substantially rectangular-shaped flat plate, and as shown to FIG. 4 (A) and FIG. 5, the case attachment part 32 is one side 31a of the press part 31, and the said one side 31a. It consists of a pair of leg part 33 respectively extended below from the opposing one side 31b which opposes. The lid attachment portion 34 includes a pair of arms 35 extending from the other side 31c orthogonal to the one side 31a of the pressing portion 31 and the opposite other side 31d facing the other side 31c.
Each of the pair of leg portions 33 constituting the case attachment portion 32 includes a lower extension portion 33a extending downward from the one side 31a of the pressing portion 31 and the opposite side 31b facing the one side 31a, and a lower extension portion. A first screw mounting portion 33b for fixing the transformer 20 to the bottom portion 7a of the case 7, which is bent outward from the lower end of the 33a, is provided. A plurality (two in this embodiment) of mounting screw through-holes 33c through which the mounting screws 37 are inserted are formed in the first screw mounting portion 33b.

Further, each of the pair of arm portions 35 constituting the lid attachment portion 34 has an upper surface of the pressing portion 31 from the other side 31c orthogonal to the one side 31a of the pressing portion 31 and the opposite other side 31d facing the other side 31c. An outwardly extending portion 35a extending outwardly at the same height, and a second screw mounting portion 35c provided at the tip of the outwardly extending portion 35a for fixing the transformer 20 to the lid body 10; It has. And this 2nd screw attachment part 35c is bent outward from the upper end of the standing part 35b raised from the front-end | tip of the outward extension part 35a, and is formed. The first screw mounting portion 33b and the second screw mounting portion 35c extend in parallel to each other. The second screw attachment portion 35c is formed with a plurality (two in this embodiment) of female screw portions 35d to which the attachment screws 38 are screwed. The height of the upright portion 35b, that is, the height H from the upper surface of the outward extending portion 35a extending outwardly at the same level as the upper surface of the pressing portion 31 to the upper surface of the second screw mounting portion 35c is shown in FIG. As shown in 4 (B), the distance is adjusted to be the same as the distance from the upper surface of the pressing portion 31 to the lid 10.

Further, the case attachment portion 32 of the attachment member 30 is attached to the bottom portion 7a of the case 7 with the silicone rubber 36 sandwiched between the lower surface of the pressing portion 31 and the upper surface of the ferrite core 20a. The vibration on the side of the transformer 20 can be suppressed, and the vibration of the upper side of the transformer 20 can be suppressed by attaching the lid attachment portion 34 of the attachment member 30 to the lid 10. Thereby, the vibration-resistant characteristic of the transformer 20 which is a heavy object can be improved.
Further, in the mounting structure of the transformer 20, the pressing portion 31 is configured by a substantially rectangular flat plate, and the case mounting portion 32 is respectively downward from one side 31a of the pressing portion 31 and the opposite one side 31b facing the one side 31a. The lid attachment portion 34 includes a pair of arms 33 extending from the other side 31c orthogonal to the one side 31a of the pressing portion 31 and the opposite other side 31d facing the other side 31c. .

Thereby, after the transformer 20 is fixed to the housing 2 by the mounting member 30, the swing of the transformer 20 in the direction along the one side 31 a of the pressing portion 31 constituting the mounting member 30 is mainly orthogonal to the one side 31 a of the pressing portion 31. The other side 31c and the other side 31c facing the other side 31c can be restrained by the lid attachment part 34 including a pair of arm portions 35 extending from the other side 31d, and the other side orthogonal to the one side 31a of the pressing part 31 The vibration of the transformer 20 in the direction along 31c can be suppressed mainly by the case mounting portion 32 including a pair of leg portions 33 extending downward from one side 31a of the pressing portion 31 and the opposite side 31b facing the one side 31a. The vibration resistance characteristics of the transformer 20 that is a heavy object can be further improved.

Further, in the mounting structure of the transformer 20, each of the pair of leg portions 33 includes a lower extension portion 33a extending downward from one side 31a of the pressing portion 31 and an opposing side 31b facing the one side 31a, and a lower extension. A first screw mounting portion 33b for fixing the transformer 20 to the bottom portion 7a of the case 7, which is bent outward from the lower end of the portion 33a, is provided. For this reason, the case attachment portion 32 of the attachment member 30 can be attached to the bottom portion 7a of the case 7 by screwing via the first screw attachment portion 33b.
Further, each of the pair of arm portions 35 constituting the lid attachment portion 34 has an upper surface of the pressing portion 31 from the other side 31c orthogonal to the one side 31a of the pressing portion 31 and the opposite other side 31d facing the other side 31c. An outwardly extending portion 35a extending outwardly at the same height, and a second screw mounting portion 35c provided at the tip of the outwardly extending portion 35a for fixing the transformer 20 to the lid body 10; It has. For this reason, the lid attachment portion 34 of the attachment member 30 can be attached to the lid 10 by screwing via the second screw attachment portion 35c.

Claims (6)

A magnetic component mounting structure for fixing a magnetic component to a housing, wherein the housing is a bottomed box-shaped case for housing the magnetic component, and is fixed to the case, and an upper opening of the case In the mounting structure of a magnetic component comprising a lid for closing
Mounting for fixing the magnetic component to the housing in a state where the heat conductive member is sandwiched between an elastic heat conductive member disposed on the upper surface of the magnetic member and the upper surface of the magnetic member With members,
The mounting member includes a pressing portion that presses the thermal conductive member, a downward extending from the pressing portion, a case mounting portion for fixing the magnetic component to the bottom of the case, and an extension from the pressing portion, A structure for attaching a magnetic component, comprising: a metal member having a lid attachment portion for fixing the magnetic component to the lid. The pressing portion constituting the attachment member is constituted by a substantially rectangular flat plate,
The case attachment portion is composed of a pair of legs extending downward from one side of the pressing portion and an opposite side facing the one side,
2. The magnetic component according to claim 1, wherein the lid attaching portion includes a pair of arms extending from an other piece orthogonal to the one side of the pressing portion and an opposite other piece facing the other piece. Mounting structure. Each of the pair of leg portions is bent downward outward from one side of the pressing portion and from one opposite side facing the one side, and a lower extension portion extending downward from a lower end of the lower extension portion. A first screw mounting portion for fixing the magnetic component to the bottom of
Each of the pair of arm portions extends outwardly from the other piece orthogonal to the one side of the pressing portion and the opposite other piece facing the other piece at a height flush with the upper surface of the pressing portion. The extension part and the 2nd screw attachment part for fixing the said magnetic component to the said cover body provided in the front-end | tip of this outward extension part are provided. Mounting structure for magnetic parts.   The magnetic part mounting according to claim 3, wherein the second screw mounting portion is formed by bending outward from an upper end of an upright portion raised from a tip of the outward extending portion. Construction.   4. The structure for mounting a magnetic component according to claim 3, wherein the second screw mounting portion extends outward from the tip of the outward extending portion at a height flush with the upper surface of the pressing portion. . A power conversion device comprising the mounting structure for a magnetic component according to any one of claims 1 to 5.

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