コア３０の第１の孔部３８および第２の孔部３９には、第１の伝熱部材５０が埋設される。第１の伝熱部材５０は、コア３０の第１の孔部３８の内面と第２の孔部３９の内面に埋設させる形状を有し、コア３０の第１の孔部３８の内面と第２の孔部３９の内面に面接触している。第１の伝熱部材５０は、第１の伝熱部材５０に対向するコア３０の第１の孔部３８の内面と第２の孔部３９の内面の全てに接触してもよい。
第１の伝熱部材５０がコア３０の第１の孔部３８の内面と第２の孔部３９の内面に面接触することにより、コア３０を位置決めすることと、第１のコア部３１と第２のコア部３２との接合位置を決めることができる。
A first heat transfer member 50 is embedded in the first hole 38 and the second hole 39 of the core 30. The first heat transfer member 50 has a shape embedded in the inner surface of the first hole 38 and the inner surface of the second hole 39 of the core 30. The inner surface of the second hole 39 is in surface contact. The first heat transfer member 50 may contact all the inner surfaces of the first hole 38 and the second hole 39 of the core 30 facing the first heat transfer member 50.
By first heat transfer member 50 is in surface contact with the inner surfaces of the second hole portion 39 of the first hole portion 38 of the core 30, and positioning the core 30, the first core portion 31 The joining position with the second core portion 32 can be determined.
図７は電力変換動作時にコア３０内部に発生する熱による温度分布を示した模式図である。コイル４０に流れる電流により発生する交番磁界は、第２のコア部３２の中央脚部３２ｂ近傍に最も集中するため、コアのヒステリシス損失によって生ずる発熱が中央脚部３２ｂ内部が最も大きくなり、なお且つ、中央脚部３２ｂの周囲はコイル４０および基板２１で周囲を覆われているため放熱しにくい状態にある。このため、中央脚部３２ｂ近傍が最も温度が高くなる。また、熱は上部に逃げるため温度分布は上下非対称となる。
FIG. 7 is a schematic diagram showing a temperature distribution due to heat generated in the core 30 during the power conversion operation. Alternating magnetic field generated by current flowing through the coil 40 in order to most concentrated in the central leg portion 32b near the second core portion 32, heat generation central leg 32b inside greatest caused by hysteresis losses in the core, Note and Since the periphery of the central leg portion 32b is covered with the coil 40 and the substrate 21, it is difficult to dissipate heat. For this reason, the temperature is highest in the vicinity of the center leg portion 32b. In addition, since heat escapes upward, the temperature distribution becomes asymmetrical.
この発明における実施の形態１に係る回路装置は、図１から図７までに示すように、コイル４０を巻装され前記コイル４０の巻線層ＣＳで外周を囲まれた第２の脚部３２ｂからなる中央脚部と、前記中央脚部３２ｂの両側に中央脚部３２ｂに沿い中央脚部３２ｂと隣り合って並設され前記中央脚部３２ｂとの間に前記巻線層ＣＳを介在する第１の脚部３２ａおよび第３の脚部３２ｃからなる対をなす側方脚部とを有し、前記中央脚部３２ｂの端部と前記側方脚部３２ａ，３２ｃの端部とは第１のコア部３１の上部および第２のコア部３２により構成されるヨーク部ＹＫにより磁気的および機械的に結合されて互いに連接されるコア３０からなるトランス用コアを備えた電力変換装置に適用される回路装置において、第２の脚部３２ｂからなる前記中央脚部に磁軸方向に沿って上下に延在する孔部３９を設け、前記孔部３９にコア３０からなる前記トランス用コアを構成するコア材より熱伝導率の大きな伝熱部材５０を埋設するとともに、前記伝熱部材５０からの伝熱を前記トランス用コアの外部へ導出するため水平方向に延在する放熱部材５５に前記伝熱部材５０がその底部５０ｂにおける端面で面接触して熱的および機械的に接続されるようにしたことを特徴とする。
すなわち、一列に平行する３つの脚部３２ａ，３２ｂ，３２ｃと、隣り合う該脚部３２ａ，３２ｂ，３２ｃ間に形成された２つの空間部と、該３つの平行する脚部３２ａ，３２ｂ，３２ｃの端部同士を接続する第１のコア部３１と第２のコア部３２の上部とからなるヨーク部ＹＫを備え、前記３つの脚部３２ａ，３２ｂ，３２ｃの中央脚部３２ｂを周回するように少なくとも１つの回路のコイル４０を該２つの空間部の中に有したコア３０からなるトランス用コアを備えた電力変換装置において、前記中央脚部３２ｂに磁軸方向に沿った孔部３９を設け、該孔部３９にコア３０からなる前記トランス用コア材より熱伝導率の大きな伝熱部材５０を埋設するとともに、該伝熱部材５０がコア３０からなる前記トランス用コア外部の放熱部材５５に熱的および機械的に接続されるようにしたものである。
コア３０からなる前記トランス用コアの孔部３９の内面と前記伝熱部材５０は面接触するように構成されている。
コア３０からなる前記トランス用コアは第１のコア部３１と第２のコア部３２とにより構成され、第１のコア部３１は中央脚部３２ｂを構成する構成部分および側方脚部３２ａ，３２ｃを構成する構成部分が設けられたＥ型コアとして構成される。第１のコア部３１における中央脚部構成部分３２ｂおよび側方脚部構成部分３２ａ，３２ｃの一端部（上方端部）はヨーク部ＹＫにより互いに磁気的および機械的に結合され一体に形成されている。第２のコア部３２は第１のコア部３１における中央脚部構成部分３２ｂおよび側方脚部構成部分３２ａ，３２ｃの他端部（下方端部）に連接するＩ型コアとして構成され、第１のコア部３１における中央脚部構成部分３２ｂおよび側方脚部構成部分３２ａ，３２ｃの他端部（下方端部）は第２のコア部３２で構成されるヨーク部ＹＫにより互いに磁気的および機械的に結合される。第２のコア部３２を貫通し第１のコア部３１へ貫入して伝熱部材５０が埋設される孔部３８，３９が設けられている。前記トランス用コアはＥ型である第１のコア部３１とＩ型である第２のコア部３２とにより構成されるＥＩ型コアとしての形状を有するものであり、Ｅ型の第１のコア部３１と同様のコア部を向い合せにしたＥＥ型や、このＥＥ型のコア部における中央脚部を円柱状にしたＥＥＲ型とすることもでき、前記トランス用コアとして単一のコア部を用いる場合には、ＥＥ型のコア部における中央脚部として周面を円弧状とした突部を有するＥＲ型を採用することもできる。
そして、前記回路装置における前記コイル４０は、電力変換装置に内蔵して設けられた平滑用インダクタンスを有する平滑回路１４における平滑用インダクタンスとして用いられ、前記回路装置が電力変換装置に適用される。
この構成により、伝熱部材５０がコア３０の温度上昇の最も高い箇所に面接触し、なお且つ放熱部材５５に面接触により接続されているため、電力変換装置の動作時にコア３０で発生する熱を効率良く放熱部材に伝達できる。したがって、この発明の電力変換装置によれば、コア３０の温度上昇が確実に抑制され得る。また、伝熱部材５０が一対のコア３１，３２からなるコア３０の中心部に貫通する構造であるため、一対のコアの位置ズレ抑制効果も得られる。
As shown in FIGS. 1 to 7, the circuit device according to Embodiment 1 of the present invention has a second leg portion 32 b wound with a coil 40 and surrounded by a winding layer CS of the coil 40. The winding layer CS is interposed between the central leg portion 32b and the central leg portion 32b. The central leg portion 32b is adjacent to the central leg portion 32b. A pair of side legs each including one leg 32a and a third leg 32c, and the end of the central leg 32b and the ends of the side legs 32a and 32c are first. This is applied to a power conversion device having a transformer core comprising a core 30 that is magnetically and mechanically coupled to each other by a yoke portion YK constituted by an upper portion of the core portion 31 and a second core portion 32. in that circuit device, and a second leg portion 32 b A hole 39 extending vertically along the magnetic axis direction is provided in the central leg, and the heat transfer member 50 having a higher thermal conductivity than the core material that constitutes the core for transformer composed of the core 30 in the hole 39. And the heat transfer member 50 is in surface contact with the heat radiating member 55 extending in the horizontal direction at the end surface of the bottom portion 50b in order to lead the heat transfer from the heat transfer member 50 to the outside of the transformer core. It is characterized by being thermally and mechanically connected.
That is, three leg portions 32a, 32b, 32c parallel to one row, two space portions formed between the adjacent leg portions 32a, 32b, 32c, and the three parallel leg portions 32a, 32b, 32c. A yoke portion YK composed of a first core portion 31 and an upper portion of the second core portion 32 that connect the ends of the three leg portions 32a, 32b, and 32c so as to go around the central leg portion 32b. In the power converter having a transformer core comprising the core 30 having at least one coil 40 of the circuit in the two space portions, a hole 39 along the magnetic axis direction is formed in the central leg portion 32b. The heat transfer member 50 having a larger thermal conductivity than the transformer core material made of the core 30 is embedded in the hole 39, and the heat dissipation member 55 outside the transformer core made of the core 30 is embedded in the hole portion 39. It is obtained so as to be thermally and mechanically connected.
The inner surface of the hole portion 39 of the transformer core including the core 30 and the heat transfer member 50 are configured to be in surface contact with each other.
The transformer core including the core 30 is constituted by a first core portion 31 and a second core portion 32, and the first core portion 31 includes a constituent portion constituting a central leg portion 32b and side leg portions 32a, It is configured as an E-type core provided with the components constituting 32c. One end portions (upper end portions) of the central leg portion 32b and the side leg portions 32a and 32c in the first core portion 31 are magnetically and mechanically coupled to each other by the yoke portion YK, and are integrally formed. Yes. The second core portion 32 is configured as an I-type core connected to the other end portions (lower end portions) of the central leg portion 32b and the side leg portions 32a and 32c in the first core portion 31. The other end portions (lower end portions) of the central leg portion 32b and the side leg portion portions 32a and 32c in one core portion 31 are magnetically coupled to each other by a yoke portion YK formed of the second core portion 32. Mechanically coupled. Holes 38 and 39 that penetrate the second core portion 32 and penetrate the first core portion 31 and have the heat transfer member 50 embedded therein are provided. The transformer core has a shape as an EI type core constituted by an E type first core part 31 and an I type second core part 32, and an E type first core. The EE type with the same core part as the part 31 or the EER type with the center leg part of the EE type core part formed in a columnar shape can be used, and a single core part is used as the transformer core. When used, an ER type having a projecting part with an arc-shaped peripheral surface as a central leg part in the EE type core part may be employed.
And the said coil 40 in the said circuit apparatus is used as a smoothing inductance in the smoothing circuit 14 which has the smoothing inductance provided in the power converter, and the said circuit apparatus is applied to a power converter.
With this configuration, the heat transfer member 50 is in surface contact with the portion of the core 30 where the temperature rise is highest, and is connected to the heat dissipation member 55 by surface contact. Therefore, heat generated in the core 30 during operation of the power conversion device. Can be efficiently transmitted to the heat dissipation member. Therefore, according to the power converter of this invention, the temperature rise of the core 30 can be suppressed reliably. In addition, since the heat transfer member 50 has a structure that penetrates through the center portion of the core 30 including the pair of cores 31 and 32, the effect of suppressing the positional deviation between the pair of cores is also obtained.
実施の形態２．
この発明における実施の形態１を図８に基づいて説明する。図８は実施の形態２に係る回路部品の概略断面図である。
図８を参照して、実施の形態２に係る回路装置としての回路部品２０ａを説明する。本実施の形態の回路部品２０ａは、実施の形態１の回路部品２０とほぼ同様の構成を備えるが、主に以下の点で異なる。
本実施の形態の回路部品２０ａは、コア３０の頂部３３の上面に第２の放熱部材５６を新たに備えている。第２の放熱部材５６は、第１の伝熱部材５０に熱的および機械的に接続される。第２の放熱部材５６は、ビス止め、溶接、接着剤等の固定手段によって、第１の伝熱部材５０に熱的および機械的に接続される。
そして、第１の放熱部材５５がコア３０の底部３４、すなわち第１のコア部３１の下面と面接触して水平方向に延在し熱的および機械的に接続されるのに対し、第２の放熱部材５６はコア３０の頂部３３、すなわち第２のコア部３２の上面と面接触して水平方向に延在し熱的および機械的に接続されるものである。
また、第１の伝熱部材５０と第２の放熱部材５６は同じ材質による一体物であってもよい。第２の放熱部材５６は、コア３０、コイル４０および第１の伝熱部材５０を収容する電力変換装置１の筐体の一部を構成してもよい。第２の放熱部材５６は、コア３０を支持してもよい。
Embodiment 2. FIG.
A first embodiment of the present invention will be described with reference to FIG. FIG. 8 is a schematic cross-sectional view of a circuit component according to the second embodiment.
With reference to FIG. 8, a circuit component 20a as a circuit device according to the second embodiment will be described. The circuit component 20a of the present embodiment has substantially the same configuration as the circuit component 20 of the first embodiment, but differs mainly in the following points.
The circuit component 20a of the present embodiment newly includes a second heat radiating member 56 on the top surface of the top portion 33 of the core 30. The second heat radiating member 56 is thermally and mechanically connected to the first heat transfer member 50. The second heat radiating member 56 is thermally and mechanically connected to the first heat transfer member 50 by fixing means such as screwing, welding, or adhesive.
Then, while the first heat radiation member 55 is the bottom 34, i.e. thermal and mechanically connected extends in the horizontal direction to contact the lower surface and the surface of the first core portion 31 of the core 30, the 2 of the heat radiation member 56 is the top 33 of the core 30, that is intended to be connected thermally and mechanically extend horizontally in contact the upper surface and the surface of the second core portion 32.
Moreover, the 1st heat-transfer member 50 and the 2nd heat radiating member 56 may be an integral thing by the same material. The second heat radiating member 56 may constitute a part of the casing of the power conversion device 1 that houses the core 30, the coil 40, and the first heat transfer member 50. The second heat radiating member 56 may support the core 30.
この発明における実施の形態２に係る電力変換装置は、図８に示すように、前述した実施の形態１における構成において、前記放熱部材は第１の放熱部材５５および第２の放熱部材５６としてコア３０からなる前記トランス用コアの上下両側の外面に前記伝熱部材５０の延在方向と直交方向に延在して設けられ、前記伝熱部材５０の両側における頂部５０ａおよび底部５０ｂでの各端面が前記上下の各放熱部材５５，５６に熱的および機械的に面接触してそれぞれ接続されるようにしたことを特徴とする。
この構成により、コア３０から発生した熱を第１の放熱部材５５および第２の放熱部材５６を介して、コア３０の頂部３３および底部３４の両面から放散させことができ、コア３０の温度上昇がより確実に抑制され得る。また、第２の放熱部材５６がコア３０の頂部３３の上面に面接触しているため、低い熱抵抗でコア３０の熱を放散することもできる。
As shown in FIG. 8, in the power conversion device according to Embodiment 2 of the present invention, in the configuration of Embodiment 1 described above, the heat dissipation member is a core as the first heat dissipation member 55 and the second heat dissipation member 56. 30. The end faces of the top 50a and the bottom 50b on both sides of the heat transfer member 50 are provided on the outer surfaces of the upper and lower sides of the transformer core 30 and extending in a direction orthogonal to the extending direction of the heat transfer member 50. Is characterized in that it is connected to the upper and lower heat radiating members 55, 56 in thermal and mechanical surface contact with each other.
With this configuration, the heat generated from the core 30 can be dissipated from both the top 33 and the bottom 34 of the core 30 via the first heat radiating member 55 and the second heat radiating member 56, and the temperature of the core 30 increases. Can be more reliably suppressed. Further, since the second heat radiating member 56 is in surface contact with the upper surface of the top portion 33 of the core 30, the heat of the core 30 can be dissipated with a low thermal resistance.
この発明における実施の形態３を図９および図１０に基づいて説明する。図９は実施の形態３に係る回路部品の概略平面図である。図１０は実施の形態３に係る回路部品の、図９に示すＢ−Ｂ線における概略断面図である。
図９および図１０を参照して、実施の形態３に係る回路装置としての回路部品２０ｂを説明する。本実施の形態の回路部品２０ｂは、実施の形態１の回路部品２０とほぼ同様の構成を備え、同様の効果を奏するが、主に以下の点で異なる。
本実施の形態の回路部品２０ｂは、第１の伝熱部材５０と第１の放熱部材５５を熱的及び機械的に接続する第２の伝熱部材５２と第３の伝熱部材５３を新たに備えている。
実施の形態１と同様に、第１の伝熱部材５０は、コア３０の底部３４側においてビス止め、溶接、接着剤等の固定手段によって、第１の放熱部材５５に直接熱的および機械的に接続されているが、新たにコア３０の頂部３３を経由し第１の放熱部材５５に熱を伝える中継用伝熱部材として第２の伝熱部材５２と第３の伝熱部材５３を有する。
A third embodiment of the present invention will be described with reference to FIGS. FIG. 9 is a schematic plan view of a circuit component according to the third embodiment. 10 is a schematic cross-sectional view of the circuit component according to the third embodiment, taken along line BB shown in FIG.
A circuit component 20b as a circuit device according to the third embodiment will be described with reference to FIGS. The circuit component 20b according to the present embodiment has substantially the same configuration as the circuit component 20 according to the first embodiment and has the same effects, but mainly differs in the following points.
In the circuit component 20b of the present embodiment, the second heat transfer member 52 and the third heat transfer member 53 that connect the first heat transfer member 50 and the first heat dissipation member 55 thermally and mechanically are newly added. In preparation.
Similarly to the first embodiment, the first heat transfer member 50 is screwed in the bottom 34 of the core 30, welding, by fixing means such as adhesive, thermal directly to the first heat radiating member 55 and the machine The second heat transfer member 52 and the third heat transfer member 53 are newly connected as relay heat transfer members that transfer heat to the first heat dissipation member 55 via the top portion 33 of the core 30. Have.
コア３０の頂部３３と第１の伝熱部材５０の頂部５０ａに面接触する第２の伝熱部材５２を備えている。第２の伝熱部材５２と第１の放熱部材５５を接続する支柱となる第３の伝熱部材５３が設けられている。第２の伝熱部材５２は第３の伝熱部材５３とビス、溶接、接着剤などの固定手段で熱的および機械的に接続される。第３の伝熱部材５３は第１の放熱部材５５とビス、溶接、接着剤などの固定手段で熱的および機械的に接続される。第２の伝熱部材５２は第２のコア部３２を第１のコア部３１に向けて押圧するよう配置してもよい。
また、第２の伝熱部材５２と第３の伝熱部材５３は同じ材質による一体物であってもよい。第２の伝熱部材５２および第３の伝熱部材５３は、コア３０、コイル４０および第１の伝熱部材５０を収容する電力変換装置１の筐体の一部を構成してもよい。第２の伝熱部材５２および第３の伝熱部材５３は、コア３０を支持してもよい。
そして、コア３０の頂部３３と第１の伝熱部材５０の頂部５０ａに面接触して水平方向に延在する第２の伝熱部材５２と対応して、コア３０の底部３４と第１の伝熱部材５０の底部５０ｂに面接触して水平方向に延在する追加の中継用伝熱部材として第４の伝熱部材（図示せず）を設け、第１の伝熱部材５０の両側に設けられた頂部５０ａおよび底部５０ｂでの端面が第１〜３の伝熱部材５０，５２，５３および第４の伝熱部材からなる角筒状の伝熱構成体を形成する中継用伝熱部材を介して第１の放熱部材５５に面接触によりそれぞれ接続されるようにすることもできる。コア３０の頂部３３と第１の伝熱部材５０の頂部５０ａに面接触する第２の伝熱部材５２と、コア３０の底部３４と第１の伝熱部材５０の底部５０ｂに面接触する第４の伝熱部材と、コア３０の両側面に沿って延在し第２の伝熱部材５２の両端部と第４の伝熱部材の両端部を熱的および機械的に面接触によりそれぞれ接続する第３の伝熱部材５３，５３とを設けることにより、コア３０の上下両面および左右両面を囲む第１〜３の伝熱部材５０，５２，５３および第４の伝熱部材からなる角筒状の伝熱構成体を形成し、この伝熱構成体の下面を第１の放熱部材５５に接続されるようにすることもできるものである。
A second heat transfer member 52 in surface contact with the top 33 of the core 30 and the top 50a of the first heat transfer member 50 is provided. A third heat transfer member 53 serving as a support for connecting the second heat transfer member 52 and the first heat dissipation member 55 is provided. The second heat transfer member 52 is thermally and mechanically connected to the third heat transfer member 53 by fixing means such as screws, welding, and adhesive. The third heat transfer member 53 is thermally and mechanically connected to the first heat radiating member 55 by fixing means such as screws, welding, and adhesive. The second heat transfer member 52 may be disposed so as to press the second core portion 32 toward the first core portion 31.
Further, the second heat transfer member 52 and the third heat transfer member 53 may be an integrated body made of the same material. The second heat transfer member 52 and the third heat transfer member 53 may constitute a part of the casing of the power conversion device 1 that houses the core 30, the coil 40, and the first heat transfer member 50. The second heat transfer member 52 and the third heat transfer member 53 may support the core 30.
Then, in correspondence with the second heat transfer member 52 extending in the horizontal direction in surface contact with the top portion 33 of the core 30 and the top portion 50a of the first heat transfer member 50, the bottom portion 34 of the core 30 and the first heat transfer member 52 are in contact with each other. A fourth heat transfer member (not shown) is provided as an additional relay heat transfer member that is in surface contact with the bottom 50b of the heat transfer member 50 and extends in the horizontal direction, and is provided on both sides of the first heat transfer member 50. The heat transfer member for relay which forms the rectangular tube-shaped heat-transfer structural body in which the end surface in the provided top part 50a and the bottom part 50b consists of the 1st-3rd heat transfer members 50,52,53 and the 4th heat transfer member It is also possible to connect to the first heat radiating member 55 through surface contact. The second heat transfer member 52 that is in surface contact with the top 33 of the core 30 and the top 50a of the first heat transfer member 50, and the first that is in surface contact with the bottom 34 of the core 30 and the bottom 50b of the first heat transfer member 50. The heat transfer member 4 and the both end portions of the second heat transfer member 52 that extend along both side surfaces of the core 30 are connected to the both end portions of the fourth heat transfer member by thermal and mechanical surface contact. By providing the third heat transfer members 53 and 53, the rectangular tubes formed of the first to third heat transfer members 50, 52 and 53 and the fourth heat transfer member surrounding the upper and lower surfaces and the left and right surfaces of the core 30 are provided. It is also possible to form a heat transfer structure and connect the lower surface of the heat transfer structure to the first heat radiating member 55.