JP2014011926A - Power conversion apparatus for electric vehicle - Google Patents

Power conversion apparatus for electric vehicle Download PDF

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JP2014011926A
JP2014011926A JP2012148970A JP2012148970A JP2014011926A JP 2014011926 A JP2014011926 A JP 2014011926A JP 2012148970 A JP2012148970 A JP 2012148970A JP 2012148970 A JP2012148970 A JP 2012148970A JP 2014011926 A JP2014011926 A JP 2014011926A
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capacitor
terminal
semiconductor module
mounting
bolt
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JP5866103B2 (en
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Tomonori Takada
知範 高田
Toshihiko Ishida
俊彦 石田
Takashi Ikimi
高志 伊君
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Hitachi Construction Machinery Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a power conversion apparatus for an electric vehicle that has a configuration capable of reducing inductance as well as achieving miniaturization and improving assemblability.SOLUTION: A semiconductor module 3 is arranged on one of mounting surfaces of a mounting part 15 while a capacitor 2 is arranged on the other surface. On the opposite surface of the mounting surface of the semiconductor module 3 to the mounting part 15, an AC terminal 23, which is connected to an AC-side connection conductor 7 by a bolt 26 so as to make the connection part parallel to the surface, is provided. Similarly on the surface, a DC terminal 24, which is connected to a terminal 27 of the capacitor 2 or a DC-side connection conductor by a bolt 30 so as to make the connection part parallel to the surface, is provided. The terminal 27 of the capacitor 2 is provided on the mounting surface side to the mounting part 15.

Description

本発明は、半導体モジュールからなるインバータおよびインバータに加える直流電圧の平滑化用コンデンサを備える電動車両用動力変換装置に係り、特に高出力密度が要求される電力変換装置の実装構造に関する。   The present invention relates to an inverter made of a semiconductor module and a power converter for an electric vehicle including a capacitor for smoothing a DC voltage applied to the inverter, and more particularly to a mounting structure of a power converter that requires high output density.

電動車両用電力変換装置は、直流電力を回転電機に供給する交流電力に変換するための複数組の半導体素子を備える半導体モジュールと、直流電圧を平滑化するコンデンサとを備えて構成される。近年、電動車両用の回転電機に要求される出力が大きくなり、それに伴って、回転電機に供給する電力が増大する傾向にある。この電力の増大に伴い、電力変換装置も大型化する傾向にある。しかしながら、車両用の電力変換装置は限られた空間内に収めなければならないため、電力変換装置の体積をむやみに大きくすることはできず、電力変換装置を比較的小型に構成することが要求される。   The electric vehicle power conversion device includes a semiconductor module including a plurality of sets of semiconductor elements for converting DC power into AC power supplied to a rotating electrical machine, and a capacitor that smoothes the DC voltage. In recent years, the output required for a rotating electrical machine for electric vehicles has increased, and accordingly, the power supplied to the rotating electrical machine tends to increase. With this increase in power, power converters tend to be larger. However, since the power conversion device for a vehicle must be contained in a limited space, the volume of the power conversion device cannot be increased unnecessarily, and it is required to make the power conversion device relatively small. The

この小型化の要求に応えるため、特許文献１には、電力変換装置として、温度上昇を抑えるための冷却流体を流す流路を形成した板状取付け部品の上面側にパワー半導体チップを有する半導体モジュールを配置し、取付け部品の下面側にコンデンサを配置した構造が開示されている。そしてこのコンデンサの端子と半導体モジュールの端子とを接続するため、取付け部品に貫通孔を設け、その貫通孔に接続導体を挿通し、その接続導体の下端を、コンデンサ端子に接続用ボルトにより接続し、接続導体の上端を半導体モジュールの端子に接続用ボルトによって接続している。また、コンデンサの端子と半導体モジュールの端子は上下方向に向けて設けられており、従ってコンデンサや半導体モジュールの各端子と接続導体とを接続するボルトは横向きに設けられている。   In order to meet this demand for miniaturization, Patent Document 1 discloses, as a power converter, a semiconductor module having a power semiconductor chip on the upper surface side of a plate-like mounting part in which a flow path for flowing a cooling fluid for suppressing a temperature rise is formed. And a capacitor is disclosed on the lower surface side of the mounting part. In order to connect the capacitor terminal and the semiconductor module terminal, a through hole is provided in the mounting part, a connection conductor is inserted into the through hole, and the lower end of the connection conductor is connected to the capacitor terminal with a connection bolt. The upper end of the connection conductor is connected to the terminal of the semiconductor module by a connection bolt. In addition, the capacitor terminals and the semiconductor module terminals are provided in the vertical direction, and therefore the bolts for connecting the terminals of the capacitors and the semiconductor module and the connection conductors are provided laterally.

一方、特許文献２には、半導体モジュール接続導体とコンデンサとの間のインダクタンスを低減すると共に、取扱いが簡単な電力変換装置を実現するため、半導体モジュールの端子の配列方向とコンデンサの端子の配列方向が直交するように配列したものが開示されている。そして、半導体モジュール側の平板形状の正側接続導体と平板形状の負側接続導体のいずれかを、コンデンサ側接続導体と平行になるようにＬ型に折り曲げると共に、半導体モジュールとコンデンサの正側接続導体同士、および半導体モジュールとコンデンサの負側接続導体同士をそれぞれ接続するボルトが異なる方向となるように位置決めしている。この構成によれば、コンデンサの正負の接続導体同士が近接し、半導体素子の正負の接続導体同士も近接するため、インダクタンスの低減が可能となる。   On the other hand, in Patent Document 2, in order to reduce the inductance between the semiconductor module connection conductor and the capacitor and to realize a power converter that is easy to handle, the arrangement direction of the terminals of the semiconductor module and the arrangement direction of the terminals of the capacitor Are arranged so as to be orthogonal to each other. Then, either the flat positive connection conductor of the flat shape on the semiconductor module side or the negative connection conductor of the flat plate shape is bent into an L shape so as to be parallel to the capacitor side connection conductor, and the positive connection between the semiconductor module and the capacitor is connected. The conductors and the bolts that connect the semiconductor module and the negative connection conductors of the capacitor are positioned in different directions. According to this configuration, since the positive and negative connection conductors of the capacitor are close to each other and the positive and negative connection conductors of the semiconductor element are also close to each other, inductance can be reduced.

特開平１１−６１８７５号公報Japanese Patent Laid-Open No. 11-61875 特許第４４８８９７８号公報Japanese Patent No. 4488978

しかしながら、特許文献１に記載の電力変換装置においては、コンデンサの端子と半導体モジュールの端子とを接続するボルトの取付け方向が横向きであり、しかも外向き、内向きと多岐にわたっているため、組立構造が複雑化している。また、コンデンサの端子と接続導体とを接続するボルトの上にベース板等が存在するため、組立作業性が悪い。また、コンデンサの端子と半導体モジュールの端子とを接続導体に接続するボルトを取付けるための作業空間を確保するため、取付け部品とコンデンサとの間の空間および取付け部品と半導体モジュールとの間の空間が増大し、インダクタンスの増大を引き起こすと共に、コンデンサと半導体モジュールとの間の無駄スペースを発生させ、この無駄スペースが小型化の障害になるという問題点がある。   However, in the power conversion device described in Patent Document 1, the mounting direction of the bolts connecting the terminals of the capacitor and the terminals of the semiconductor module is lateral, and there are a wide variety such as outward and inward. It is getting complicated. Further, since a base plate or the like exists on the bolt that connects the capacitor terminal and the connection conductor, the assembling workability is poor. In addition, in order to secure a working space for attaching bolts for connecting the capacitor terminals and the semiconductor module terminals to the connection conductor, there is a space between the mounting part and the capacitor and a space between the mounting part and the semiconductor module. This increases the inductance and causes a waste space between the capacitor and the semiconductor module. This waste space becomes an obstacle to miniaturization.

また、特許文献２に記載の電力変換装置においては、半導体モジュールとコンデンサの端子間の接続導体をＬ字形に形成しているため、配線経路が長く、接続導体間および装置の他の部分との絶縁を保つために大きな空間が必要となり、装置が大型化するという問題点がある。   Further, in the power conversion device described in Patent Document 2, since the connection conductor between the semiconductor module and the capacitor terminal is formed in an L shape, the wiring path is long, and the connection conductor and other parts of the device are connected to each other. In order to maintain insulation, a large space is required, and there is a problem that the apparatus becomes large.

本発明は、上記問題点に鑑み、小型化と組立性向上が可能になると共に、インダクタンスの低減が可能となる構成の電動車両用電力変換装置を提供することを目的とする。   In view of the above problems, an object of the present invention is to provide a power conversion device for an electric vehicle having a configuration that enables downsizing and improvement in assemblability and reduction in inductance.

請求項１の電動車両用電力変換装置は、直流電力を交流電力に変換する半導体素子を備える半導体モジュールと、直流電圧を平滑化するコンデンサと、内部に冷却用流体を流す流路を有し、かつ前記コンデンサおよび前記半導体モジュールを取付けた取付け部品とを備えた電動車両用電力変換装置において、
前記取付け部品の一方の取付け面に前記半導体モジュールを配置し、他方の取付け面に前記コンデンサを配置し、
前記半導体モジュールの前記取付け部品への取付け面の反対側の面に、前記取付け面に接続部が平行をなし、交流側接続導体にボルトにより接続される交流端子と、前記取付け面に接続部が平行をなし、前記コンデンサの端子に直接または直流側接続導体を介してボルトにより接続される直流端子とを設け、
前記コンデンサの端子を前記取付け部品へのコンデンサ取付け面側に設けたことを特徴とする。 The power conversion device for an electric vehicle according to claim 1 includes a semiconductor module including a semiconductor element that converts DC power into AC power, a capacitor that smoothes the DC voltage, and a flow path for flowing a cooling fluid therein. And in the electric power converter for electric vehicles provided with the attachment parts which attached the capacitor and the semiconductor module,
The semiconductor module is disposed on one mounting surface of the mounting component, the capacitor is disposed on the other mounting surface,
An AC terminal connected to the AC-side connecting conductor by a bolt on a surface opposite to the mounting surface of the semiconductor module to the mounting component, and connected to the AC-side connecting conductor by a bolt, and a connecting portion on the mounting surface A parallel terminal, and a direct current terminal connected to the capacitor terminal by a bolt directly or via a direct current side connection conductor;
The capacitor terminal is provided on the capacitor mounting surface side to the mounting part.

請求項２の電動車両用電力変換装置は、請求項１に記載の電動車両用電力変換装置において、
前記コンデンサの端子を前記コンデンサの前記取付け部品への取付け面から延出させ、その延出部の先端に前記半導体モジュールの直流端子に重ねてボルトにより接続する接続部を形成したことを特徴とする。 The electric power converter for electric vehicles according to claim 2 is the electric power converter for electric vehicles according to claim 1,
The capacitor terminal is extended from a mounting surface of the capacitor to the mounting part, and a connection portion is formed at the tip of the extension portion to overlap the DC terminal of the semiconductor module and connect with a bolt. .

請求項３の電動車両用電力変換装置は、請求項１に記載の電動車両用電力変換装置において、
前記コンデンサの前記取付け部品への取付け面に、その取付け面に平行をなす接続面を有するコンデンサの端子を設け、
前記端子に、直流側接続導体の一端側の接続部を重ねてボルトにより接続し、
前記直流側接続導体の他端側の接続部を前記半導体モジュールの直流端子にボルトにより接続したことを特徴とする。 The electric power converter for electric vehicles according to claim 3 is the electric power converter for electric vehicles according to claim 1,
On the mounting surface of the capacitor to the mounting part, a capacitor terminal having a connection surface parallel to the mounting surface is provided,
To the terminal, the connection part on one end side of the DC side connection conductor is overlapped and connected by a bolt,
The connecting portion on the other end side of the DC side connection conductor is connected to a DC terminal of the semiconductor module by a bolt.

請求項４の電動車両用電力変換装置は、請求項１に記載の電動車両用電力変換装置において、
前記取付け部品に、その前記半導体モジュールの取付け面から前記コンデンサの取付け面にわたって貫通する開口部を設け、
前記コンデンサの一部に、コンデンサ電極が絶縁材により覆われた延出部を前記半導体モジュール側に延出させて形成し、
前記延出部を前記開口部に貫挿し、
前記延出部の半導体モジュール側端面に、前記取付け面と平行をなし、前記半導体モジュールの前記直流端子に前記直流側接続導体を介してボルトにより接続されるコンデンサの端子を設けたことを特徴とする。 The electric power converter for electric vehicles according to claim 4 is the electric power converter for electric vehicles according to claim 1,
The mounting part is provided with an opening penetrating from the mounting surface of the semiconductor module to the mounting surface of the capacitor,
A part of the capacitor is formed by extending an extension part in which the capacitor electrode is covered with an insulating material to the semiconductor module side,
Inserting the extension into the opening;
A capacitor terminal connected to the direct current terminal of the semiconductor module by a bolt via the direct current side connection conductor is provided on the semiconductor module side end surface of the extension portion and parallel to the mounting surface. To do.

請求項５の電動車両用電力変換装置は、請求項１から４までのいずれかに記載の電動車両用電力変換装置において、
前記コンデンサの前記取付け部品に対する取付け面側にインサートナットを埋め込み、
前記取付け部品に半導体モジュール配置面側から貫通するボルトを前記インサートナットに螺合することにより、前記コンデンサを前記取付け部品に取付けたことを特徴とする。 The electric power converter for electric vehicles according to claim 5 is the electric power converter for electric vehicles according to any one of claims 1 to 4,
An insert nut is embedded on the mounting surface side of the capacitor with respect to the mounting component,
The capacitor is attached to the attachment part by screwing a bolt that penetrates the attachment part from the semiconductor module placement surface side to the insert nut.

請求項１の発明によれば、取付け部品の表裏面に半導体モジュールとコンデンサとを配置し、半導体モジュールの交流端子および直流端子をその接続部が取付け部品の取付け面に平行をなすように設けたので、交流側接続導体や直流側接続導体またはコンデンサの端子との接続を行なうためのボルトの取付け方向が統一されるため、組立性が良好となる。また、ボルトを締め付ける順番が自由となり、組立後もどの部品からも取外しができ、メンテナンスにおける作業性も向上する。   According to the first aspect of the present invention, the semiconductor module and the capacitor are arranged on the front and back surfaces of the mounting component, and the AC terminal and the DC terminal of the semiconductor module are provided so that the connecting portion thereof is parallel to the mounting surface of the mounting component. Therefore, the mounting direction of the bolt for connecting to the AC side connecting conductor, the DC side connecting conductor, or the terminal of the capacitor is unified, so that the assemblability is improved. Further, the bolts can be tightened in any order, and can be removed from any part even after assembly, improving workability in maintenance.

また、コンデンサと取付け部品との間に、コンデンサの端子を接続導体に接続する作業スペースを設ける必要が無くなると共に、接続するための部品数が少なくなり、小型化が可能となる。   In addition, it is not necessary to provide a work space for connecting the capacitor terminal to the connection conductor between the capacitor and the mounting component, and the number of components for connection is reduced, thereby enabling miniaturization.

また、コンデンサの端子を取付け部品への取付け面側に設けたので、コンデンサ端子と半導体モジュール端子間を接続する経路が短くなり、その結果低インダクタンスとなり、耐振動性も向上する。   Further, since the capacitor terminal is provided on the mounting surface side to the mounting component, the path connecting the capacitor terminal and the semiconductor module terminal is shortened, resulting in a low inductance and improved vibration resistance.

請求項２の発明によれば、コンデンサの端子を前記コンデンサの前記取付け部品への取付け面から延出させ、その延出部の先端に前記半導体モジュールの直流端子に重ねて接続する接続部を形成したので、構成部品の点数をより削減でき、小型化が促進される。   According to the second aspect of the present invention, the terminal of the capacitor is extended from the mounting surface of the capacitor to the mounting part, and the connecting portion is formed at the tip of the extending portion so as to overlap and connect to the DC terminal of the semiconductor module. As a result, the number of component parts can be further reduced, and miniaturization is promoted.

請求項３の発明によれば、コンデンサの取付け部品への取付け面に平行をなす接続部を有するコンデンサ端子を設け、この端子に、直流側接続導体の接続部を重ねてボルトにより接続する構造としたので、コンデンサ端子に対する直流側接続導体の接続を、交流側接続導体や直流側接続導体を半導体モジュールに接続するボルトと同方向をなすボルトにより行なえるので、ボルトの取付け方向が統一されるため、組立性が良好となる。   According to the invention of claim 3, a capacitor terminal having a connection portion parallel to the mounting surface of the capacitor to the mounting part is provided, and the connection portion of the DC side connection conductor is overlapped with this terminal and connected by a bolt. Therefore, the connection of the DC side connection conductor to the capacitor terminal can be performed by the bolt that is in the same direction as the bolt that connects the AC side connection conductor or the DC side connection conductor to the semiconductor module, so the bolt mounting direction is unified. Assemblability is improved.

請求項４の発明によれば、コンデンサの端子を先端部に有し、絶縁材により覆われた延出部を取付け部品に設けた開口部に貫挿した構造としたので、コンデンサと取付け部品との電気的絶縁が確保され、開口部の幅を狭くすることができ、取付け部品の小型化が可能となる。さらに、取付け部品に開口部を設けた構造において、コンデンサ端子が取付け部品への取付け面側に設けられていることにより、開口部の直下にコンデンサに接続する接続導体を配設するスペースを設けることが不要となるため、このスペース形成のためにコンデンサを分割する必要がなく、コンデンサの数及び端子のスペースを低減できることから、さらなる小型化が可能となる。   According to the invention of claim 4, the capacitor has a terminal at the tip, and the extended portion covered with the insulating material is inserted into the opening provided in the attachment part. Electrical insulation is ensured, the width of the opening can be narrowed, and the mounting part can be miniaturized. Furthermore, in a structure in which an opening is provided in the mounting part, a space for disposing a connection conductor connected to the capacitor is provided immediately below the opening by providing the capacitor terminal on the mounting surface side to the mounting part. Therefore, it is not necessary to divide the capacitor to form this space, and the number of capacitors and the space of the terminals can be reduced, so that further miniaturization is possible.

請求項５の発明によれば、コンデンサの前記取付け部品に対する取付け面側にインサートナットを固定し、前記半導体モジュール配置面側から貫通するボルトを前記インサートナットに螺合する構造としたので、コンデンサを取付けるボルトの方向も他のボルトの取付け方向と統一され、組立性やメンテナンスにおける作業性がさらに向上する。   According to the invention of claim 5, since the insert nut is fixed to the mounting surface side of the capacitor with respect to the mounting component and the bolt penetrating from the semiconductor module arrangement surface side is screwed to the insert nut, The direction of bolts to be installed is also unified with the direction of other bolts, which further improves workability in assembly and maintenance.

本発明の電動車両用電力変換装置の一実施の形態を示す回路図である。1 is a circuit diagram showing an embodiment of a power converter for an electric vehicle of the present invention. 本発明の電動車両用電力変換装置の一実施の形態を示す縦断面図である。1 is a longitudinal sectional view showing an embodiment of an electric vehicle power converter according to the present invention. 図２の電動車両用電力変換装置の一部断面平面図である。It is a partial cross section top view of the electric power converter for electric vehicles of FIG. 本発明の電動車両用電力変換装置の他の実施の形態を示す縦断面図である。It is a longitudinal cross-sectional view which shows other embodiment of the power converter device for electric vehicles of this invention. 図４の電動車両用電力変換装置の一部断面平面図である。It is a partial cross section top view of the power converter device for electric vehicles of FIG. （Ａ）は図４、図５に示す電動車両用電力変換装置の負側接続導体を示す平面図、（Ｂ）はその正面図、（Ｃ）は同じく正側接続導体を示す平面図、（Ｂ）はその正面図である。(A) is a plan view showing a negative side connection conductor of the electric power converter for an electric vehicle shown in FIGS. 4 and 5, (B) is a front view thereof, and (C) is a plan view showing the positive side connection conductor. B) is a front view thereof. （Ａ）は図４ないし図６に示した接続導体の組み合わせ構造を示す平面図、（Ｂ）、（Ｃ）、（Ｄ）はそれぞれ（Ａ）のＥ−Ｅ、Ｆ−Ｆ、Ｇ−Ｇ断面図である。(A) is a plan view showing the combination structure of the connection conductors shown in FIGS. 4 to 6, and (B), (C), and (D) are EE, FF, and GG of (A), respectively. It is sectional drawing. 本発明の電動車両用電力変換装置の他の実施の形態を示す縦断面図である。It is a longitudinal cross-sectional view which shows other embodiment of the power converter device for electric vehicles of this invention. 図８の電動車両用電力変換装置の一部断面平面図である。It is a partial cross section top view of the electric power converter for electric vehicles of FIG. 図８の一部拡大図である。FIG. 9 is a partially enlarged view of FIG. 8. 図９の一部拡大図である。FIG. 10 is a partially enlarged view of FIG. 9.

図１は本発明の電動車両用電力変換装置の一実施の形態を示す回路図である。図１において、１はバッテリーからなる直流電源、２はこの直流電源１の出力電圧を安定化させるコンデンサ、３は直流電力を交流電力に変換するインバータを構成する半導体モジュールであり、それぞれスイッチング用半導体素子を備えて構成されたものである。この例では３組の半導体モジュール３によりインバータを構成したものを示す。４，５は直流電源１とコンデンサ２および半導体モジュール３に接続された直流側接続導体であり、このうち、４は正側接続導体、５は負側接続導体である。６は車両に搭載された電動機、７はこの電動機６と半導体モジュール３とを接続する交流側接続導体である。電動機６としては発電機能を持たせて構成される場合もあり、発電機として機能する場合には不図示のゲート駆動回路により半導体モジュール３が制御されて電動機６による発電電力により直流電源１が充電される。   FIG. 1 is a circuit diagram showing an embodiment of an electric vehicle power converter according to the present invention. In FIG. 1, 1 is a DC power source comprising a battery, 2 is a capacitor for stabilizing the output voltage of the DC power source 1, and 3 is a semiconductor module constituting an inverter for converting DC power into AC power, each of which is a switching semiconductor. An element is provided. In this example, an inverter is constituted by three sets of semiconductor modules 3. Reference numerals 4 and 5 are DC side connection conductors connected to the DC power source 1 and the capacitor 2 and the semiconductor module 3. Among these, 4 is a positive side connection conductor and 5 is a negative side connection conductor. Reference numeral 6 denotes an electric motor mounted on the vehicle, and reference numeral 7 denotes an AC side connecting conductor that connects the electric motor 6 and the semiconductor module 3. The motor 6 may be configured to have a power generation function. When the motor 6 functions as a power generator, the semiconductor module 3 is controlled by a gate drive circuit (not shown) and the DC power source 1 is charged by the power generated by the motor 6. Is done.

図２は本発明による電力変換装置の一実施の形態を示す縦断面図、図３はその一部断面平面図である。図２、図３において、９は車両の車体、１０はこの車体９にベース板１１を介してボルト１２により取付けられる電動車両用電力変換装置のケースを示す。１３はこのケース１０にボルト１４により取付けられた蓋である。１５はコンデンサ２と半導体モジュール３の取付け部品である。取付け部品１５は、半導体モジュール３を表面に面当接して配置し、裏面にコンデンサ２を面当接して配置した平板状をなす。この実施の形態においては、この取付け部品１５を、内部に冷却流体通路１５ａを有して半導体モジュール３により生じる熱を吸収するヒートシンクからなる例について示している。この例においては、取付け部品１５をケース１０と一体に設けた例を示しているが、この取付け部品１５をケース１０と別体に構成してボルト等によりケース１０に取付けてもよい。１６は各半導体モジュール３上に搭載されたゲート駆動基板であり、駆動用素子（図示せず）を搭載したものである。   FIG. 2 is a longitudinal sectional view showing an embodiment of a power conversion device according to the present invention, and FIG. 3 is a partial sectional plan view thereof. 2 and 3, reference numeral 9 denotes a vehicle body, and reference numeral 10 denotes a case of an electric vehicle power conversion device that is attached to the vehicle body 9 with a bolt 12 via a base plate 11. A lid 13 is attached to the case 10 with bolts 14. Reference numeral 15 denotes a mounting part for the capacitor 2 and the semiconductor module 3. The attachment component 15 has a flat plate shape in which the semiconductor module 3 is disposed in surface contact with the front surface and the capacitor 2 is disposed in surface contact with the back surface. In this embodiment, the attachment part 15 is shown as an example of a heat sink that has a cooling fluid passage 15 a inside and absorbs heat generated by the semiconductor module 3. In this example, the attachment part 15 is provided integrally with the case 10. However, the attachment part 15 may be configured separately from the case 10 and attached to the case 10 with bolts or the like. Reference numeral 16 denotes a gate drive substrate mounted on each semiconductor module 3 on which drive elements (not shown) are mounted.

１８は半導体モジュール３の取付け用ボルトであり、これらのボルト１８は、半導体モジュール３の上方から半導体モジュール３に設けたボルト挿通孔に貫通し、取付け部品１５に設けたねじ孔に螺合して半導体モジュール３を取付け部品１５に取付ける。２０はコンデンサ２の上面、すなわちコンデンサ２の取付け部品１５への取付け面に埋め込まれたインサートナット、２１はコンデンサ２を取付けるためのボルトであり、このボルト２１は、取付け部品１５に設けたボルト挿通孔に半導体モジュール３側から貫通してインサートナット２０に螺合することにより、コンデンサ２を取付け部品１５に取付ける。   Reference numeral 18 denotes mounting bolts for the semiconductor module 3, and these bolts 18 penetrate through bolt insertion holes provided in the semiconductor module 3 from above the semiconductor module 3, and are screwed into screw holes provided in the attachment component 15. The semiconductor module 3 is attached to the attachment part 15. 20 is an insert nut embedded in the upper surface of the capacitor 2, that is, the mounting surface of the capacitor 2 to the mounting part 15, 21 is a bolt for mounting the capacitor 2, and this bolt 21 is a bolt insertion provided in the mounting part 15. The capacitor 2 is attached to the attachment part 15 by passing through the hole from the semiconductor module 3 side and screwing into the insert nut 20.

２３は半導体モジュールの交流端子、２４，２５はそれぞれ半導体モジュールの直流端子となる正側端子、負側端子である。これらの端子２３〜２５は板状をなし、半導体モジュール３の上面、すなわち取付け面の反対側の面に固定して設けられている。これらの端子２３〜２５は、取付け部品１５への取付け面とほぼ平行をなす。交流端子２３は前記交流側接続導体７にボルト２６により接続される。交流側接続導体７はケース１０に設けた開口部１０ａに通して図１に示した電動機６に接続される。   Reference numeral 23 is an AC terminal of the semiconductor module, and 24 and 25 are a positive terminal and a negative terminal which are DC terminals of the semiconductor module, respectively. These terminals 23 to 25 have a plate shape and are fixed to the upper surface of the semiconductor module 3, that is, the surface opposite to the mounting surface. These terminals 23 to 25 are substantially parallel to the mounting surface to the mounting part 15. The AC terminal 23 is connected to the AC side connection conductor 7 by a bolt 26. The AC side connecting conductor 7 is connected to the electric motor 6 shown in FIG. 1 through an opening 10 a provided in the case 10.

２７，２８はコンデンサ２の正側端子および負側端子である。これらの端子２７，２８は、コンデンサ２の取付け部品２５への取付け面から半導体モジュール３側に延出させて設ける。正側端子２７は３つの半導体モジュール３の正側端子２４に共通に接続されるものであり、この正側端子２７の先端をＬ字形に曲成して、取付け部品１５の取付け面と平行をなす接続部２７ａを形成する。負側端子２８にも同様に、この負側端子２８の先端をＬ字形に曲成して、取付け部品１５の取付け面と平行をなす接続部２８ａを形成する。そして、これらの接続部２７ａ，２８ａを、半導体モジュール３の正側端子２４と負側端子２５に重ねてボルト３０，３１により接続する。   Reference numerals 27 and 28 denote a positive terminal and a negative terminal of the capacitor 2, respectively. These terminals 27 and 28 are provided so as to extend from the mounting surface of the capacitor 2 to the mounting component 25 to the semiconductor module 3 side. The positive side terminal 27 is commonly connected to the positive side terminals 24 of the three semiconductor modules 3, and the front end of the positive side terminal 27 is bent in an L shape so as to be parallel to the mounting surface of the mounting part 15. A connecting portion 27a is formed. Similarly, the negative side terminal 28 is bent at the tip of the negative side terminal 28 in an L-shape to form a connection portion 28 a that is parallel to the mounting surface of the mounting part 15. These connecting portions 27 a and 28 a are overlapped with the positive side terminal 24 and the negative side terminal 25 of the semiconductor module 3 and connected by bolts 30 and 31.

図３に示すように、図１に示した直流電源１に接続される直流側接続導体４，５は、それぞれ正側端子２７，２８の接続部２７ａ，２８ａに重ね、ボルト３２，３３により半導体モジュール３の正側端子２４、負側端子２５に接続される。これらの直流側接続導体４，５は、ケース１０に設けた開口部１０ｂに通して外部に引き出し、図１に示した直流電源１に接続される。なお、直流電源１はケース１０内に設ける構成も採用できる。   As shown in FIG. 3, the DC side connection conductors 4 and 5 connected to the DC power source 1 shown in FIG. 1 are overlapped with the connection portions 27a and 28a of the positive side terminals 27 and 28, respectively, and the bolts 32 and 33 are used for semiconductors. The positive terminal 24 and the negative terminal 25 of the module 3 are connected. These DC side connection conductors 4 and 5 are drawn out through an opening 10b provided in the case 10 and connected to the DC power source 1 shown in FIG. In addition, the structure provided in case 10 can also employ | adopt DC power supply 1. FIG.

この実施の形態においては、取付け部品１５の表裏面に半導体モジュール３とコンデンサ２を配置し、半導体モジュール３の交流端子２３、およびコンデンサ２の端子２７，２８に接続する直流端子２４，２５をその接続部が取付け部品１５の取付け面に平行となるように設けたので、交流側接続導体７や直流側接続導体４，５または交流端子２３との接続を行なうためのボルト２６，３０〜３３の取付け方向が統一されるため、組立性が良好となる。また、ボルト２６，３０〜３３を締め付ける順番が自由となり、組立後もどの部品からも取外しができ、メンテナンスにおける作業性も向上する。   In this embodiment, the semiconductor module 3 and the capacitor 2 are arranged on the front and back surfaces of the mounting part 15, and the AC terminals 23 of the semiconductor module 3 and the DC terminals 24 and 25 connected to the terminals 27 and 28 of the capacitor 2 are Since the connecting portion is provided so as to be parallel to the mounting surface of the mounting part 15, the bolts 26, 30 to 33 for connecting to the AC side connecting conductor 7, the DC side connecting conductors 4, 5 or the AC terminal 23 are provided. As the mounting direction is unified, the assemblability is improved. Further, the order in which the bolts 26, 30 to 33 are tightened becomes free, and can be removed from any part after assembly, and the workability in maintenance is improved.

さらに、この実施の形態においては、コンデンサ２の取付け部品１５に対する取付け面側にインサートナット２０を埋め込み、半導体モジュール３の配置面側から貫通するボルト２１をインサートナット２０に螺合することにより、コンデンサ２を取付ける構造としたので、ボルト２１の方向も他のボルト２６，３０〜３３の取付け方向と統一され、組立性やメンテナンスにおける作業性がさらに向上する。   Furthermore, in this embodiment, the insert nut 20 is embedded on the mounting surface side of the capacitor 2 with respect to the mounting component 15, and the bolt 21 penetrating from the arrangement surface side of the semiconductor module 3 is screwed into the insert nut 20, thereby 2 is attached, the direction of the bolt 21 is also unified with the mounting direction of the other bolts 26, 30 to 33, and the workability in assembly and maintenance is further improved.

また、コンデンサ２の取付け部品１５への取付け面からコンデンサ２の正側端子２７および負側端子２８を半導体モジュール３側に延出するように形成して半導体モジュール３の正側端子２４、負側端子２５に直接接続する構造としたので、部品数が少なくなる上、コンデンサ２を半導体モジュール３の端子２４，２５に接続する作業スペースをコンデンサ２と取付け部品１５との間に設ける必要が無くなり、小型化が可能となる。   Further, the positive side terminal 27 and the negative side terminal 28 of the capacitor 2 are formed so as to extend from the mounting surface of the capacitor 2 to the mounting part 15 to the semiconductor module 3 side. Since the structure is directly connected to the terminal 25, the number of parts is reduced, and it is not necessary to provide a work space for connecting the capacitor 2 to the terminals 24 and 25 of the semiconductor module 3 between the capacitor 2 and the mounting part 15. Miniaturization is possible.

また、コンデンサ２の端子２７，２８を取付け部品１５への取付け面側に設けたので、コンデンサ２の端子２７，２８と半導体モジュール３の端子２４，２５との間を接続する経路が短くなり、その結果低インダクタンスとなり、耐振動性も向上する。   In addition, since the terminals 27 and 28 of the capacitor 2 are provided on the mounting surface side to the mounting part 15, the path connecting the terminals 27 and 28 of the capacitor 2 and the terminals 24 and 25 of the semiconductor module 3 is shortened. As a result, the inductance is reduced and the vibration resistance is improved.

図４は本発明の電動車両用電力変換装置の他の実施の形態を示す縦断面図、図５はその一部断面平面図であり、これらの図において、図２、図３と同じ符号は同じ機能を有する部品を示す。この実施の形態は、それぞれ３つの半導体モジュール３からなるインバータを２組備えたものである。各組のインバータは同一あるいはそれぞれ異なる電動機に接続される。   FIG. 4 is a longitudinal sectional view showing another embodiment of the electric power converter for an electric vehicle of the present invention, and FIG. 5 is a partial sectional plan view thereof. In these drawings, the same reference numerals as those in FIGS. Parts having the same function are shown. In this embodiment, two sets of inverters each including three semiconductor modules 3 are provided. Each set of inverters is connected to the same or different motors.

この実施の形態においても、半導体モジュール３に設けた交流端子２３や直流端子２４，２５は取付け部品１５の取付け面と平行に設けられている。取付け部品１５の中央部にはコンデンサ２と半導体モジュール３との接続を行なうための開口部１５ｂが設けられている。この実施の形態においては、コンデンサ２の取付け部品１５への取付け面（上面）における開口部１５ｂに対応する箇所に、正側端子３５と負極端子３６を上面と平行に形成する。そして、これらの端子３５，３６に重ねて、それぞれ半導体モジュール３の正側端子２４、負側端子２５に接続するための直流側接続導体である正側接続導体３８、負側接続導体３９をボルト４０，４１により接続する。   Also in this embodiment, the AC terminal 23 and the DC terminals 24 and 25 provided in the semiconductor module 3 are provided in parallel with the mounting surface of the mounting part 15. An opening 15 b for connecting the capacitor 2 and the semiconductor module 3 is provided at the center of the mounting part 15. In this embodiment, the positive terminal 35 and the negative terminal 36 are formed in parallel to the upper surface at a location corresponding to the opening 15b on the mounting surface (upper surface) of the capacitor 2 to the mounting component 15. Then, the positive side connection conductor 38 and the negative side connection conductor 39 that are DC side connection conductors for connecting to the positive side terminal 24 and the negative side terminal 25 of the semiconductor module 3 are respectively bolted to the terminals 35 and 36. 40 and 41 are used for connection.

図６（Ａ）、（Ｃ）はそれぞれ正側接続導体３８、負側接続導体３９の平面図、図６（Ｂ）、（Ｄ）はそれぞれ（Ａ）、（Ｃ）の正面図である。また、図７（Ａ）はこれらの接続導体３８，３９を組み合わせた状態を示す平面図、図７（Ｂ）、（Ｃ）、（Ｄ）はそれぞれ（Ａ）のＥ−Ｅ、Ｆ−Ｆ、Ｇ−Ｇ断面図である。   FIGS. 6A and 6C are plan views of the positive side connecting conductor 38 and the negative side connecting conductor 39, respectively, and FIGS. 6B and 6D are front views of FIGS. 6A and 6C, respectively. 7A is a plan view showing a state in which the connection conductors 38 and 39 are combined, and FIGS. 7B, 7C, and 7D are EE and FF in FIG. 7A, respectively. FIG.

これらの図に示すように、正側接続導体３８、負側接続導体３９はいずれもコンデンサ２の正側端子３５、負側端子３６に重ねてボルト４０，４１により接続する平板状の接続部３８ａ，３９ａを有し、これらの平板部３８ａ，３９ａにボルト４０，４１を挿通するボルト挿通孔３８ｂ，３９ｂを有する。また、半導体モジュール３側の端部には、半導体モジュール３の正側端子２４、負側端子２５に接続する平板状の接続部３８ｃ、３９ｃを有し、各接続部３８ｃ，３９ｃに接続用ボルト４２，４３を挿通するボルト挿通孔３８ｄ，３９ｄを有する。   As shown in these drawings, the positive side connection conductor 38 and the negative side connection conductor 39 are overlapped on the positive side terminal 35 and the negative side terminal 36 of the capacitor 2 and are connected by bolts 40 and 41 so as to be connected to each other by flat plates 38a. 39a, and the flat plate portions 38a, 39a have bolt insertion holes 38b, 39b through which the bolts 40, 41 are inserted. Further, at the end on the semiconductor module 3 side, there are flat connection portions 38c and 39c connected to the positive side terminal 24 and the negative side terminal 25 of the semiconductor module 3, and the connection bolts are connected to the connection portions 38c and 39c, respectively. Bolt insertion holes 38d and 39d for inserting 42 and 43 are provided.

前記正側接続導体３８および負側接続導体３９は、半導体モジュール３の正側端子２４、負側端子２５に対し、接続部３８ｃ、３９ｃを重ねてボルト４２，４３により接続する。また、正側接続導体３８、負側接続導体３９の端部は、外部の直流電源１に接続される直流側接続導体４，５が、半導体モジュール３の端子２４，２５と共にボルト４４，４５により接続される（図５参照）。   The positive side connection conductor 38 and the negative side connection conductor 39 are connected to the positive side terminal 24 and the negative side terminal 25 of the semiconductor module 3 by connecting bolts 42 and 43 with overlapping connection portions 38c and 39c. Further, the end portions of the positive side connection conductor 38 and the negative side connection conductor 39 are connected to the external DC power source 1 by DC side connection conductors 4 and 5 together with terminals 24 and 25 of the semiconductor module 3 by bolts 44 and 45. Connected (see FIG. 5).

この実施の形態は、コンデンサ２の取付け部品１５への取付け面に平行をなす接続部からなるコンデンサ端子３５，３６を設け、これらの端子３５，３６に、直流側接続導体３８，３９の接続部３８ａ，３９ａを重ねてボルト４０，４１により接続する構造としたものである。このため、コンデンサ端子３５，３６に対する直流側接続導体３８，３９の接続を、前記ボルト２６，４２，４３と同方向をなすボルトに４０，４１により行なえるので、ボルトの取付け方向が統一されるため、組立性が良好となる。   In this embodiment, capacitor terminals 35 and 36 each having a connection portion parallel to the attachment surface of the capacitor 2 to the attachment component 15 are provided, and the connection portions of the DC side connection conductors 38 and 39 are connected to these terminals 35 and 36, respectively. 38a and 39a are overlapped and connected by bolts 40 and 41. For this reason, the DC side connection conductors 38 and 39 can be connected to the capacitor terminals 35 and 36 by the bolts 40 and 41 in the same direction as the bolts 26, 42 and 43. Therefore, the assemblability is good.

また、コンデンサ２の端子３５，３６が取付け部品１５への取付け面側に設けられて接続導体３８，３９のコンデンサ２と半導体モジュール３との間の長さが短くなる上、コンデンサ２と半導体モジュール３との間において、正側接続導体３８と負側接続導体３９とが並べて設けられるため、インダクタンスが低減される。また、コンデンサ２の端子３５，３６がコンデンサ２の取付け部品１５側に設けられているため、コンデンサ端子を取付け部品１５の反対側に設ける場合のように、コンデンサ端子への接続導体を通すスペースを開口部１５ｂの直下に設けることが不要となる。このため、この接続導体を通すスペース形成のために２組のインバータそれぞれにコンデンサを分割する必要がなく、２組のコンデンサに共通の一体のコンデンサを使用することができ、もってコンデンサの数及び端子のスペースを低減できることから、さらなる小型化が可能となる。   Further, the terminals 35 and 36 of the capacitor 2 are provided on the mounting surface side to the mounting component 15, so that the length between the capacitor 2 and the semiconductor module 3 of the connection conductors 38 and 39 is shortened, and the capacitor 2 and the semiconductor module are connected. 3, the positive side connection conductor 38 and the negative side connection conductor 39 are provided side by side, so that the inductance is reduced. Further, since the terminals 35 and 36 of the capacitor 2 are provided on the attachment part 15 side of the capacitor 2, a space for passing the connection conductor to the capacitor terminal is provided as in the case where the capacitor terminal is provided on the opposite side of the attachment part 15. It is not necessary to provide it immediately below the opening 15b. For this reason, it is not necessary to divide the capacitors into two sets of inverters to form a space through which the connecting conductor passes, and an integrated capacitor common to the two sets of capacitors can be used. Therefore, further downsizing is possible.

また、前記実施の形態と同様に、コンデンサ２と半導体モジュール３を接続する直流側接続導体３８，３９を半導体モジュール３の端子２４，２５に接続する作業スペースをコンデンサ２と取付け部品１５との間に設ける必要が無くなり、小型化が可能となる。   Similarly to the above embodiment, a working space for connecting the DC side connection conductors 38 and 39 connecting the capacitor 2 and the semiconductor module 3 to the terminals 24 and 25 of the semiconductor module 3 is provided between the capacitor 2 and the mounting part 15. Therefore, it is not necessary to provide the device in a small size, and the size can be reduced.

図８は本発明の電動車両用電力変換装置の他の実施の形態を示す縦断面図、図８はその一部断面平面図である。図１０、図１１はそれぞれ図８、図９の部分拡大図である。この実施の形態は、コンデンサ２のケースの一部に、コンデンサ電極が絶縁材により覆われた延出部２ａを半導体モジュール３側に延出させて形成し、この延出部２ａの先端にコンデンサ２の正側端子４６、負側端子４７を、取付け部品１５への取付け面と平行をなすように形成したものである。この延出部２ａは取付け部品１５に設けた開口部１５ｂに貫挿する。   FIG. 8 is a longitudinal sectional view showing another embodiment of the electric power converter for an electric vehicle of the present invention, and FIG. 8 is a partial sectional plan view thereof. 10 and 11 are partially enlarged views of FIGS. 8 and 9, respectively. In this embodiment, an extension part 2a in which a capacitor electrode is covered with an insulating material is formed in a part of the case of the capacitor 2 so as to extend toward the semiconductor module 3, and a capacitor is formed at the tip of the extension part 2a. The positive terminal 46 and the negative terminal 47 are formed so as to be parallel to the mounting surface to the mounting part 15. This extending portion 2 a is inserted through an opening 15 b provided in the attachment part 15.

コンデンサの端子４６，４７は半導体モジュール３の正側端子２４、負側端子２５とほぼ同面をなし、コンデンサ２の正側端子４６と半導体モジュール３の正側端子２４とは正側接続導体４８を介してボルト４９，５０により接続される。同様に、コンデンサ２の負側端子４７と半導体モジュール３の負側端子２５とは負側接続導体５１を介してボルト５２，５３により接続される。直流電源１に接続される直流側接続導体４，５は、それぞれコンデンサ２の正側端子４６、負側端子４７にそれぞれボルト５４，５５により接続される。   The capacitor terminals 46 and 47 are substantially flush with the positive terminal 24 and the negative terminal 25 of the semiconductor module 3, and the positive terminal 46 of the capacitor 2 and the positive terminal 24 of the semiconductor module 3 are connected to the positive connection conductor 48. Are connected by bolts 49 and 50. Similarly, the negative terminal 47 of the capacitor 2 and the negative terminal 25 of the semiconductor module 3 are connected by bolts 52 and 53 via a negative connection conductor 51. The DC side connection conductors 4 and 5 connected to the DC power source 1 are connected to the positive side terminal 46 and the negative side terminal 47 of the capacitor 2 by bolts 54 and 55, respectively.

この実施の形態によれば、絶縁材により覆われた延出部２ａを取付け部品１５に設けた開口部１５ｂに貫挿した構造としたので、コンデンサ２と取付け部品１５との電気的短絡のおそれがなく、開口部１５ｂの幅を狭くすることができ、取付け部品の小型化が可能となる。また、前記各実施の形態と同様に、ボルト１８，２１，２６とボルト５２〜５５が同方向であることによる作業の容易化の他、インダクタンスの低減が可能となる。また、コンデンサ２の端子４６，４７がコンデンサ２の取付け部品１５側に設けられているため、コンデンサ端子を取付け部品１５の反対側に設ける場合のように、コンデンサ端子への接続導体を通すスペースを開口部１５ｂの直下に設けることが不要となる。このため、この接続導体を通すスペース形成のために２組のインバータそれぞれにコンデンサを分割する必要がなく、２組のコンデンサに共通の一体のコンデンサを使用することができ、もってコンデンサの数及び端子のスペースを低減できることから、さらなる小型化が可能となる。   According to this embodiment, since the extended portion 2a covered with the insulating material is inserted into the opening 15b provided in the attachment component 15, there is a risk of an electrical short circuit between the capacitor 2 and the attachment component 15. Therefore, the width of the opening 15b can be narrowed, and the mounting part can be downsized. Further, similarly to the above-described embodiments, the bolts 18, 21, 26 and the bolts 52 to 55 are in the same direction, so that the work can be facilitated and the inductance can be reduced. Further, since the terminals 46 and 47 of the capacitor 2 are provided on the attachment part 15 side of the capacitor 2, a space for passing the connection conductor to the capacitor terminal is provided as in the case where the capacitor terminal is provided on the opposite side of the attachment part 15. It is not necessary to provide it immediately below the opening 15b. For this reason, it is not necessary to divide the capacitors into two sets of inverters to form a space through which the connecting conductor passes, and an integrated capacitor common to the two sets of capacitors can be used. Therefore, further downsizing is possible.

以上本発明を実施の形態により説明したが、本発明は、取付け部品１５の取付け面を上下の向きとする場合のみならず、横向きとする場合にも適用できる。また、本発明を適用する車両としては乗用車や運搬車のみならず、例えばハイブリッド型のショベルやホイールローダ等の建設用車両等にも適用できる。また、本発明を実施する場合、上記実施の形態に限らず、本発明の要旨を逸脱しない範囲において、種々の変更、付加が可能である。   Although the present invention has been described above by the embodiments, the present invention can be applied not only when the mounting surface of the mounting part 15 is oriented vertically but also when it is oriented horizontally. The vehicle to which the present invention is applied can be applied not only to passenger cars and transport vehicles, but also to construction vehicles such as hybrid excavators and wheel loaders. Moreover, when implementing this invention, a various change and addition are possible not only in the said embodiment but in the range which does not deviate from the summary of this invention.

１：直流電源、２：コンデンサ、３：半導体モジュール、４，５：直流側接続導体、６：電動機、７：交流側接続導体、９：車体、１０：ケース、１３：蓋、１５：取付け部品、１５ａ：冷却流体通路、１５ｂ：開口部、１６：ゲート駆動基板、１８：ボルト、２０：インサートナット、２１：ボルト、２３：交流端子、２４：正側端子、２５：負側端子、２６：ボルト、２７：正側端子、２８：負側端子、３０〜３３：ボルト、３５：正側端子、３６：負側端子、３８：正側接続導体、３８ａ，３８ｃ：接続部、３９：負側接続導体、３９ａ，３９ｃ：接続部、４０〜４５：ボルト、４６，４７：端子、４８：正側接続導体、４９，５０：ボルト、５１：負側接続導体、５２〜５５：ボルト 1: DC power supply, 2: capacitor, 3: semiconductor module, 4, 5: DC side connection conductor, 6: electric motor, 7: AC side connection conductor, 9: vehicle body, 10: case, 13: lid, 15: mounting part 15a: cooling fluid passage, 15b: opening, 16: gate drive substrate, 18: bolt, 20: insert nut, 21: bolt, 23: AC terminal, 24: positive terminal, 25: negative terminal, 26: Bolt, 27: Positive side terminal, 28: Negative side terminal, 30 to 33: Bolt, 35: Positive side terminal, 36: Negative side terminal, 38: Positive side connection conductor, 38a, 38c: Connection part, 39: Negative side Connection conductor, 39a, 39c: connection part, 40-45: bolt, 46, 47: terminal, 48: positive side connection conductor, 49, 50: bolt, 51: negative side connection conductor, 52-55: bolt

Claims (5)

直流電力を交流電力に変換する半導体素子でなる半導体モジュールと、直流電圧を平滑化するコンデンサと、内部に冷却用流体を流す流路を有し、かつ前記コンデンサおよび前記半導体モジュールを取付けた取付け部品とを備えた電動車両用電力変換装置において、
前記取付け部品の一方の取付け面に前記半導体モジュールを配置し、他方の取付け面に前記コンデンサを配置し、
前記半導体モジュールの前記取付け部品への取付け面の反対側の面に、前記取付け面に接続部が平行をなし、交流側接続導体にボルトにより接続される交流端子と、前記取付け面に接続部が平行をなし、前記コンデンサの端子に直接または直流側接続導体を介してボルトにより接続される直流端子とを設け、
前記コンデンサの端子を前記取付け部品へのコンデンサ取付け面側に設けたことを特徴とする電動車両用電力変換装置。 A semiconductor module composed of a semiconductor element that converts DC power into AC power, a capacitor that smoothes the DC voltage, a flow path through which a cooling fluid flows, and a mounting part to which the capacitor and the semiconductor module are attached In an electric vehicle power conversion device comprising:
The semiconductor module is disposed on one mounting surface of the mounting component, the capacitor is disposed on the other mounting surface,
An AC terminal connected to the AC-side connecting conductor by a bolt on a surface opposite to the mounting surface of the semiconductor module to the mounting component, and connected to the AC-side connecting conductor by a bolt, and a connecting portion on the mounting surface A parallel terminal, and a direct current terminal connected to the capacitor terminal by a bolt directly or via a direct current side connection conductor;
A power converter for an electric vehicle, characterized in that a terminal of the capacitor is provided on a capacitor mounting surface side to the mounting component. 請求項１に記載の電動車両用電力変換装置において、
前記コンデンサの端子を前記コンデンサの前記取付け部品への取付け面から延出させ、その延出部の先端に前記半導体モジュールの直流端子に重ねてボルトにより接続する接続部を形成したことを特徴とする電動車両用電力変換装置。 In the electric power converter for electric vehicles according to claim 1,
The capacitor terminal is extended from a mounting surface of the capacitor to the mounting part, and a connection portion is formed at the tip of the extension portion to overlap the DC terminal of the semiconductor module and connect with a bolt. Electric power converter for electric vehicles. 請求項１に記載の電動車両用電力変換装置において、
前記コンデンサの前記取付け部品への取付け面に、その取付け面に平行をなす接続面を有するコンデンサの端子を設け、
前記端子に、直流側接続導体の一端側の接続部を重ねてボルトにより接続し、
前記直流側接続導体の他端側の接続部を前記半導体モジュールの直流端子にボルトにより接続したことを特徴とする電動車両用電力変換装置。 In the electric power converter for electric vehicles according to claim 1,
On the mounting surface of the capacitor to the mounting part, a capacitor terminal having a connection surface parallel to the mounting surface is provided,
To the terminal, the connection part on one end side of the DC side connection conductor is overlapped and connected by a bolt,
A power converter for an electric vehicle characterized in that a connecting portion on the other end side of the DC side connecting conductor is connected to a DC terminal of the semiconductor module by a bolt. 請求項１に記載の電動車両用電力変換装置において、
前記取付け部品に、その前記半導体モジュールの取付け面から前記コンデンサの取付け面にわたって貫通する開口部を設け、
前記コンデンサの一部に、コンデンサ電極が絶縁材により覆われた延出部を前記半導体モジュール側に延出させて形成し、
前記延出部を前記開口部に貫挿し、
前記延出部の半導体モジュール側端面に、前記取付け面と平行をなし、前記半導体モジュールの前記直流端子に前記直流側接続導体を介してボルトにより接続されるコンデンサの端子を設けたことを特徴とする電動車両用電力変換装置。 In the electric power converter for electric vehicles according to claim 1,
The mounting part is provided with an opening penetrating from the mounting surface of the semiconductor module to the mounting surface of the capacitor,
A part of the capacitor is formed by extending an extension part in which the capacitor electrode is covered with an insulating material to the semiconductor module side,
Inserting the extension into the opening;
A capacitor terminal connected to the direct current terminal of the semiconductor module by a bolt via the direct current side connection conductor is provided on the semiconductor module side end surface of the extension portion and parallel to the mounting surface. A power conversion device for an electric vehicle. 請求項１から４までのいずれかに記載の電動車両用電力変換装置において、
前記コンデンサの前記取付け部品に対する取付け面側にインサートナットを埋め込み、
前記取付け部品に半導体モジュール配置面側から貫通するボルトを前記インサートナットに螺合することにより、前記コンデンサを前記取付け部品に取付けたことを特徴とする電動車両用電力変換装置。 In the electric power converter for electric vehicles in any one of Claim 1 to 4,
An insert nut is embedded on the mounting surface side of the capacitor with respect to the mounting component,
A power converter for an electric vehicle, wherein the capacitor is attached to the attachment part by screwing a bolt that penetrates the attachment part from the semiconductor module arrangement surface side to the insert nut.
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