JP2000152662A - Inverter device incorporating capacitor for smoothing power supply - Google Patents
Inverter device incorporating capacitor for smoothing power supplyInfo
- Publication number
- JP2000152662A JP2000152662A JP10313647A JP31364798A JP2000152662A JP 2000152662 A JP2000152662 A JP 2000152662A JP 10313647 A JP10313647 A JP 10313647A JP 31364798 A JP31364798 A JP 31364798A JP 2000152662 A JP2000152662 A JP 2000152662A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- smoothing capacitor
- capacitor
- inverter
- supply smoothing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Rectifiers (AREA)
- Inverter Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、たとえば電気自動
車の走行モ−タを制御する三相インバータ装置に関し、
特に電源平滑用コンデンサをスイッチング素子上方に搭
載する電源平滑用コンデンサ搭載型インバータ装置に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-phase inverter for controlling a running motor of an electric vehicle, for example.
In particular, the present invention relates to an inverter device equipped with a power supply smoothing capacitor in which a power supply smoothing capacitor is mounted above a switching element.
【０００２】[0002]
【従来の技術】実公平４−４５２３３号公報は、偏平筒
状の偏平形コンデンサを提案している。本出願人の出願
になる特公平７−２９８６４１号公報は、三相インバー
タ回路が基板に実装されてなるインバータ部の上方に円
筒形コンデンサを配置した電源平滑用コンデンサ搭載型
インバータ装置を提案している。2. Description of the Related Art Japanese Utility Model Publication No. 4-45233 proposes a flat cylindrical flat capacitor. Japanese Patent Publication No. Hei 7-298641 filed by the present applicant proposes an inverter device equipped with a power smoothing capacitor in which a cylindrical capacitor is arranged above an inverter unit having a three-phase inverter circuit mounted on a substrate. I have.
【０００３】この円筒形コンデンサは、上アームおよび
下アームのスイッチング素子が直列接続されてなる三個
の相インバータ回路を並列接続してなる三相インバータ
回路の高低直流入力端間に接続される電源平滑用コンデ
ンサであって、三相インバータ回路のスイッチング素子
の断続に伴う上記高低直流入力端間の電圧変動を低減す
るためのものである。This cylindrical capacitor is a power supply connected between high and low DC input terminals of a three-phase inverter circuit in which three phase inverter circuits in which switching elements of an upper arm and a lower arm are connected in series are connected in parallel. A smoothing capacitor for reducing a voltage fluctuation between the high and low DC input terminals due to intermittent switching of a switching element of a three-phase inverter circuit.
【０００４】上記電源平滑用コンデンサ搭載型インバー
タ装置では、円筒形コンデンサの正、負の電極端子と三
相インバータ回路の高低直流入力端とを接続する接続ラ
インのインダクタンスに起因するスイッチングノイズや
電圧変動を低減するために、各相インバータ回路ごとに
それらの直上に円筒形コンデンサを個別に設け、各相イ
ンバータ回路の高低直流入力端と円筒形コンデンサの
正、負の電極端子とを上下にできるだけ近接させてい
る。[0004] In the above-described inverter device equipped with a power supply smoothing capacitor, switching noise and voltage fluctuation caused by inductance of a connection line connecting the positive and negative electrode terminals of the cylindrical capacitor and the high and low DC input terminals of the three-phase inverter circuit. In order to reduce power consumption, cylindrical capacitors are provided directly above each phase inverter circuit, and the high and low DC input terminals of each phase inverter circuit and the positive and negative electrode terminals of the cylindrical capacitor are placed as close as possible up and down. Let me.
【０００５】上述した電源平滑用コンデンサ搭載型イン
バータ装置の従来例を図５に示す。１０１は三相インバ
ータ回路が実装された基板の端子台部、１０２は制御回
路基板、１０３は基板上方（インバータ部の構造）に設
けられた３個の円筒形コンデンサからなる電源平滑用コ
ンデンサ、１０４はブスバー、１０５は基板に立設され
た電源平滑用コンデンサ支持用の台座、１０６は電源平
滑用コンデンサ１０３を台座１０５に固定する金具であ
る。FIG. 5 shows a conventional example of the above-described inverter device equipped with a power supply smoothing capacitor. 101 is a terminal block part of a board on which a three-phase inverter circuit is mounted, 102 is a control circuit board, 103 is a power supply smoothing capacitor consisting of three cylindrical capacitors provided above the board (structure of the inverter part), 104 Denotes a bus bar; 105, a pedestal for supporting a power supply smoothing capacitor erected on the substrate; 106, a bracket for fixing the power supply smoothing capacitor 103 to the pedestal 105;
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、上述し
た電源平滑用コンデンサ搭載型インバータ装置でもな
お、大電力高速スイッチング時には上記接続ラインのイ
ンダクタンスに起因するスイッチングノイズや電圧変動
が大きく、その結果、三相インバータ回路に給電するバ
ッテリへの悪影響や外部放射電磁波ノイズが大きいとい
う問題があった。However, even in the above-described inverter device equipped with a power supply smoothing capacitor, switching noise and voltage fluctuation due to the inductance of the connection line are large at the time of high-power high-speed switching. There are problems that the battery that supplies power to the inverter circuit is adversely affected and external radiated electromagnetic noise is large.
【０００７】本発明は上記問題点に鑑みなされたもので
あり、高速大電力スイッチングを行う場合でも入力直流
電源電圧の変動や外部放射電磁波ノイズを低減すること
ができる電源平滑用コンデンサ搭載型インバータ装置を
提供することをその解決すべき課題としている。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has a power-supply-smoothing capacitor-equipped inverter device capable of reducing fluctuations in input DC power supply voltage and external radiated electromagnetic wave noise even when high-speed and high-power switching is performed. Is the issue to be solved.
【０００８】[0008]
【課題を解決するための手段】請求項１記載の電源平滑
用コンデンサ搭載型インバータ装置によれば、多相イン
バータ回路が基板に実装されたインバータ部の上方（反
基板側）に設ける電源平滑用コンデンサとして偏平形コ
ンデンサを採用し、更に、偏平形コンデンサを、その厚
さ方向（寸法最小方向）が基板の主面方向と略直角（こ
こでは８０度以上を指定する）となる姿勢でスイッチン
グ素子を覆うように配置する。According to a first aspect of the present invention, there is provided an inverter device equipped with a power smoothing capacitor, wherein a polyphase inverter circuit is provided above an inverter section mounted on a substrate (on the opposite side of the substrate). A flat type capacitor is adopted as the capacitor, and the flat type capacitor is switched in such a manner that its thickness direction (minimum dimension direction) is substantially perpendicular to the main surface direction of the substrate (here, 80 ° or more is specified). And cover it.
【０００９】このようにすれば、高速大電力スイッチン
グを行う場合でも入力直流電源電圧の変動や外部放射電
磁波ノイズを低減することができる電源平滑用コンデン
サ搭載型インバータ装置を実現することができる。以
下、更に詳しく説明する。その厚さ方向（最も寸法が小
さい方向）が基板と直角となるように、インバータ部上
方に偏平形コンデンサを設けているので、この偏平形コ
ンデンサは、同一容量の円筒形コンデンサに比較して
正、負の電極端子をよりインバータ部側に偏位させるこ
とができ、その分だけコンデンサの正、負の電極端子と
インバータ部（更に言えばその高低直流入力端子）との
間の距離を短縮することができるので、これにより両者
を接続する接続ラインのインダクタンスを減らすことが
できる。その結果、高速大電力スイッチングを行う場合
でも入力直流電源電圧の変動や外部放射電磁波ノイズを
低減することができる。また同様に接続ラインの抵抗損
失も低減することができ、更に装置の高さを減らすこと
ができる。With this configuration, it is possible to realize a power supply smoothing capacitor-equipped inverter device capable of reducing fluctuations in input DC power supply voltage and external radiated electromagnetic wave noise even when high-speed and high-power switching is performed. Hereinafter, this will be described in more detail. A flat capacitor is provided above the inverter so that its thickness direction (the direction of the smallest dimension) is perpendicular to the substrate. Therefore, this flat capacitor is more positive than a cylindrical capacitor having the same capacitance. , The negative electrode terminal can be shifted more toward the inverter side, and the distance between the positive and negative electrode terminals of the capacitor and the inverter section (more specifically, the high and low DC input terminals) can be shortened accordingly. Therefore, the inductance of the connection line connecting the two can be reduced. As a result, even when high-speed high-power switching is performed, fluctuations in the input DC power supply voltage and external radiated electromagnetic wave noise can be reduced. Similarly, the resistance loss of the connection line can be reduced, and the height of the device can be further reduced.
【００１０】更に、金属ケースに収容される偏平形コン
デンサが良好にその下方のスイッチング素子をカバーす
るので、スイッチング素子の断続に伴う外部放射電磁波
ノイズを大幅に低減することができ、近接する他の電子
回路の誤動作などを抑止することができる。請求項２記
載の構成によれば請求項１記載の電源平滑用コンデンサ
搭載型インバータ装置において更に、共同してスイッチ
ング素子を覆う複数の電源平滑用コンデンサの底部は一
個の電源平滑用コンデンサ支持部材により一括して支持
される。In addition, since the flat type capacitor accommodated in the metal case covers the switching element below it well, external radiated electromagnetic wave noise caused by switching of the switching element can be greatly reduced, and other adjacent elements can be reduced. Malfunction of the electronic circuit can be suppressed. According to a second aspect of the present invention, in the inverter device with a power supply smoothing capacitor according to the first aspect, the bottoms of the plurality of power supply smoothing capacitors that cover the switching element jointly are formed by a single power supply smoothing capacitor supporting member. Supported collectively.
【００１１】このようにすれば、従来のように、三つの
電源平滑用コンデンサを別々に固定する場合に比較し
て、部品点数および電源平滑用コンデンサ固定作業を簡
素化することができる。特に、各電源平滑用コンデンサ
の位置決めが容易となる。請求項３記載の構成によれば
請求項２記載の電源平滑用コンデンサ搭載型インバータ
装置において更に、電源平滑用コンデンサ支持部材は、
金属部材からなるので、その電磁シールド効果によりイ
ンバータ部のスイッチング素子などから放射される外部
放射電磁波ノイズを一層低減することができ、更に、電
源平滑用コンデンサの熱をインバータ部の基板に良好に
伝達することができる。In this manner, the number of components and the operation of fixing the power supply smoothing capacitor can be simplified as compared with the conventional case where three power supply smoothing capacitors are separately fixed. In particular, the positioning of each power supply smoothing capacitor is facilitated. According to the third aspect of the present invention, in the inverter device equipped with a power supply smoothing capacitor according to the second aspect, the power supply smoothing capacitor support member further comprises:
Since it is made of a metal member, its electromagnetic shielding effect can further reduce external radiated electromagnetic wave noise radiated from the switching elements of the inverter section, and furthermore, it transmits heat of the power supply smoothing capacitor to the substrate of the inverter section well. can do.
【００１２】請求項４記載の構成によれば請求項２又は
３記載の電源平滑用コンデンサ搭載型インバータ装置に
おいて更に、電源平滑用コンデンサ保持部は、各電源平
滑用コンデンサの底部が嵌入する凹部を有するので、各
電源平滑用コンデンサの組み付けに際し、それらの位置
合わせが良好となり、部品点数も低減することができ
る。更に、電源平滑用コンデンサ支持部材を金属で製作
した場合には各電源平滑用コンデンサから電源平滑用コ
ンデンサ支持部材への放熱を一層良好にできる他、電源
平滑用コンデンサおよび電源平滑用コンデンサ支持部材
によるインバータ部のスイッチング素子の囲覆性が一層
向上するので、外部放射電磁波ノイズを一層低減するこ
とができる。According to a fourth aspect of the present invention, in the inverter device with a built-in power supply smoothing capacitor according to the second or third aspect, the power supply smoothing capacitor holding portion further includes a recess into which a bottom portion of each power supply smoothing capacitor fits. Therefore, when assembling the power supply smoothing capacitors, their alignment is improved, and the number of components can be reduced. Further, when the power supply smoothing capacitor support member is made of metal, heat radiation from each power supply smoothing capacitor to the power supply smoothing capacitor support member can be further improved, and the power supply smoothing capacitor and the power supply smoothing capacitor support member can be used. Since the enclosing property of the switching element of the inverter section is further improved, external radiated electromagnetic wave noise can be further reduced.
【００１３】請求項５記載の構成によれば請求項３また
は４記載の電源平滑用コンデンサ搭載型インバータ装置
において更に、多相インバータ回路を制御する制御回路
が実装される制御回路基板は、電源平滑用コンデンサと
インバータ部との間にインバータ部の基板と平行に配設
されている。このようにすれば、制御用回路基板は、装
置必要スペースを低減できるとともに、外部から制御回
路基板上の回路素子に影響する外部放射電磁波ノイズが
電源平滑用コンデンサ、基板（金属冷却板）により電磁
シールドされるので、電磁波ノイズ耐性を向上すること
ができる。According to a fifth aspect of the present invention, in the inverter device equipped with a power smoothing capacitor according to the third or fourth aspect, the control circuit board on which a control circuit for controlling the polyphase inverter circuit is mounted is further provided. It is arranged between the capacitor for use and the inverter section in parallel with the substrate of the inverter section. In this way, the control circuit board can reduce the space required for the device, and external radiated electromagnetic wave noise affecting circuit elements on the control circuit board from the outside can be reduced by the power supply smoothing capacitor and the board (metal cooling plate). Since it is shielded, the electromagnetic wave noise resistance can be improved.
【００１４】[0014]
【発明の実施の形態】本発明の電源平滑用コンデンサ搭
載型インバータ装置の好適例を以下の実施例により具体
的に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the inverter device equipped with a power supply smoothing capacitor according to the present invention will be specifically described with reference to the following embodiments.
【００１５】[0015]
【実施例】この電源平滑用コンデンサ搭載型インバータ
装置を電気自動車の走行モータ駆動用のものである。 （回路構成）このインバータ装置の回路図を図１に示
す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An inverter device equipped with a capacitor for smoothing a power supply is for driving a traveling motor of an electric vehicle. (Circuit Configuration) FIG. 1 shows a circuit diagram of this inverter device.
【００１６】１は電気自動車の走行電力を供給する主バ
ッテリ、２は主バッテリ１から供給される直流電力を三
相交流電力に変換して走行用モータ３に給電するインバ
ータ装置である。インバータ装置２は、電源平滑用コン
デンサ４、６個のＩＧＢＴモジュール５を有する三相イ
ンバータ回路６、三相インバータ回路６を制御する制御
回路７、二つの電流センサ８を有している。三相インバ
ータ回路６は後述する基板に実装されて本発明で言うイ
ンバータ部を構成している。制御回路７も後述する制御
回路基板に実装されている。Reference numeral 1 denotes a main battery for supplying the traveling power of the electric vehicle, and reference numeral 2 denotes an inverter device for converting DC power supplied from the main battery 1 into three-phase AC power and supplying power to the traveling motor 3. The inverter device 2 includes a power supply smoothing capacitor 4, a three-phase inverter circuit 6 having six IGBT modules 5, a control circuit 7 for controlling the three-phase inverter circuit 6, and two current sensors 8. The three-phase inverter circuit 6 is mounted on a substrate to be described later and constitutes an inverter unit according to the present invention. The control circuit 7 is also mounted on a control circuit board described later.
【００１７】ＩＧＢＴモジュール５は、ＩＧＢＴ素子５
１とフライバックダイオード５２とを並列接続しモジュ
ール化してなり、各ＩＧＢＴモジュール５は三相インバ
ータ回路６の各アームを構成している。上アームを構成
する一つのＩＧＢＴモジュール５と同相の下アームを構
成するＩＧＢＴモジュール５とは、直列接続されて相イ
ンバータ回路を構成し、結局、三相インバータ回路６は
三つの相インバータ回路を並列接続してなる。三相イン
バータ回路６の構成および動作自体は周知であるので、
これ以上の説明は省略する。それぞれの相インバータ回
路の交流出力端子は３本の出力ライン９〜１１を通じて
走行用モータ３に給電し、そして、二つの出力ラインの
電流を検出することにより三相交流モータである走行用
モータの相電流を検出している。The IGBT module 5 includes an IGBT element 5
1 and the flyback diode 52 are connected in parallel to form a module. Each IGBT module 5 constitutes each arm of the three-phase inverter circuit 6. One IGBT module 5 constituting the upper arm and the IGBT module 5 constituting the lower arm of the same phase are connected in series to form a phase inverter circuit. As a result, the three-phase inverter circuit 6 is formed by connecting three phase inverter circuits in parallel. Connect. Since the configuration and operation of the three-phase inverter circuit 6 are well known,
Further description is omitted. The AC output terminal of each phase inverter circuit supplies power to the traveling motor 3 through three output lines 9 to 11, and detects the currents of the two output lines to output the three-phase AC motor. Detects phase current.
【００１８】制御回路７は、検出した上記相電流や必要
なライン電圧に基づいて三相インバータ回路６の各ＩＧ
ＢＴ５１をＰＷＭ制御し、必要な三相交流電流を走行用
モータ３に給電している。各相インバータ回路は、それ
ぞれ高位直流入力端子１２及び低位直流入力端子１３を
もち、各高位直流入力端子１２は接続部材１４を通じて
電源平滑用コンデンサ４の正の電極端子に接続されると
ともに、更にケーブル導体１５を通じて主バッテリ１の
高位端に接続されている。同様に、各低位直流入力端子
１３は接続部材１６を通じて電源平滑用コンデンサ４の
負の電極端子に接続されるとともに、更にケーブル導体
１７を通じて主バッテリ１の低位端に接続されている。
電源平滑用コンデンサ４は、各ＩＧＢＴ５１の高速スイ
ッチングに伴う電流変動を吸収するものである。 （インバータ部の構造）インバータ装置２の組み立て状
態を図２に示す。The control circuit 7 controls each IG of the three-phase inverter circuit 6 based on the detected phase current and necessary line voltage.
The BT 51 is PWM-controlled to supply a necessary three-phase AC current to the traveling motor 3. Each phase inverter circuit has a high-order DC input terminal 12 and a low-order DC input terminal 13. Each of the high-order DC input terminals 12 is connected to a positive electrode terminal of the power supply smoothing capacitor 4 through a connection member 14, and further has a cable. It is connected to the high end of the main battery 1 through a conductor 15. Similarly, each low-level DC input terminal 13 is connected to the negative electrode terminal of the power supply smoothing capacitor 4 through the connecting member 16 and further connected to the low-level end of the main battery 1 through the cable conductor 17.
The power supply smoothing capacitor 4 absorbs a current fluctuation accompanying the high-speed switching of each IGBT 51. (Structure of Inverter Unit) The assembled state of the inverter device 2 is shown in FIG.
【００１９】金属又は複合材からなる基板２０上に三相
インバータ回路６が実装され、この基板２０は図示しな
いアルミプレート上に搭載されている。また、図２では
図示されていないものの、電流センサ８やブスバーなど
の他の部材も基板２０に設けられている。なお、このア
ルミプレートは、三相インバータ回路（インバータ部）
６が実装される上記した基板２０とともに本発明でいう
基板を構成している。The three-phase inverter circuit 6 is mounted on a substrate 20 made of a metal or a composite material, and the substrate 20 is mounted on an aluminum plate (not shown). Although not shown in FIG. 2, other members such as the current sensor 8 and the bus bar are also provided on the substrate 20. In addition, this aluminum plate is a three-phase inverter circuit (inverter part)
The substrate 20 on which the substrate 6 is mounted constitutes a substrate according to the present invention.
【００２０】基板２０の上面周縁には、角枠形状の樹脂
フレーム２１が締結され、樹脂フレーム２１の一辺の上
面には、三相インバータ回路６の各相インバータ回路の
高位直流入力端子１２及び低位直流入力端子１３が設け
られている。更に具体的に説明すると、高位直流入力端
子１２または低位直流入力端子１３をなす樹脂フレーム
２１内部の各ＩＧＢＴモジュール５のコレクタ端子また
はエミッタ端子は、図示しない複数のブスバーに個別に
接続され、これらブスバーの端部が樹脂フレーム２１の
一辺の上面にて、三相インバータ回路６の各相インバー
タ回路の高位直流入力端子１２及び低位直流入力端子１
３となっている。A rectangular frame-shaped resin frame 21 is fastened to the periphery of the upper surface of the substrate 20, and the upper DC input terminal 12 and the lower DC input terminal 12 of each phase inverter circuit of the three-phase inverter circuit 6 are mounted on the upper surface of one side of the resin frame 21. A DC input terminal 13 is provided. More specifically, the collector terminal or the emitter terminal of each IGBT module 5 inside the resin frame 21 constituting the high-order DC input terminal 12 or the low-order DC input terminal 13 is individually connected to a plurality of bus bars (not shown). Of the high-order DC input terminal 12 and the low-order DC input terminal 1 of each phase inverter circuit of the three-phase inverter circuit 6
It is 3.
【００２１】樹脂フレーム２１の上面には、樹脂フレー
ム２１の上側の開口を遮蔽するように、制御回路７が実
装された制御回路基板７０が締結されている。 （電源平滑用コンデンサの取り付け構造）電源平滑用コ
ンデンサ４の取り付け構造を図２〜図４を参照して説明
する。電源平滑用コンデンサ４は、並列接続される三つ
の偏平形コンデンサ４０からなり、各偏平形コンデンサ
４０は、その厚さ方向が基板２０の面方向と直角となる
ように、制御回路基板７０から小間隔を隔てて制御回路
基板７０に対面している。これにより、樹脂フレーム２
１の上側の開口をほぼ覆う制御回路基板７０は、更に三
つの偏平形コンデンサ４０にてほぼ覆われている。A control circuit board 70 on which the control circuit 7 is mounted is fastened to the upper surface of the resin frame 21 so as to shield the upper opening of the resin frame 21. (Mounting Structure of Power Smoothing Capacitor) The mounting structure of the power smoothing capacitor 4 will be described with reference to FIGS. The power supply smoothing capacitor 4 is composed of three flat capacitors 40 connected in parallel, and each of the flat capacitors 40 is small from the control circuit board 70 so that its thickness direction is perpendicular to the plane direction of the board 20. It faces the control circuit board 70 at an interval. Thereby, the resin frame 2
The control circuit board 70 that almost covers the upper opening 1 is further almost covered with three flat capacitors 40.
【００２２】各偏平形コンデンサ４０の一端からは、
正、負の電極端子４１，４２がそれぞれ突出しており、
樹脂フレーム２１の上面の各高位直流入力端子１２およ
び各低位直流入力端子１３は、各偏平形コンデンサ４０
の正、負の電極端子４１，４２にそれぞれ最も近接する
位置に設けられている。これは、正、負の電極端子４
１，４２と高位直流入力端子１２または低位直流入力端
子１３との間の接続部材１４，１６のインダクタンスお
よび電気抵抗を最小とするためである。From one end of each flat capacitor 40,
Positive and negative electrode terminals 41 and 42 respectively protrude,
Each high-level DC input terminal 12 and each low-level DC input terminal 13 on the upper surface of the resin frame 21 are
Are provided at positions closest to the positive and negative electrode terminals 41 and 42, respectively. These are the positive and negative electrode terminals 4
This is to minimize the inductance and electric resistance of the connecting members 14 and 16 between the first and second DC input terminals 12 and 13 or the low DC input terminal 13.
【００２３】樹脂フレーム２１の反端子取り出し側から
柱部２２が立設されており、ホルダ２３がこの柱部２２
の上端面に締結されている。ホルダ２３は、この実施例
ではアルミダイキャストで製造されており、各偏平形コ
ンデンサ４０の底部が嵌入、密着される凹部を三個有す
る保持部２３１と、この保持部２３１から柱部２２の上
端面まで突出する締結部２３２とを有している。A column 22 is erected from the resin terminal 21 on the opposite side from the terminal take-out side.
It is fastened to the upper end face of. The holder 23 is manufactured by aluminum die-casting in this embodiment. The holder 23 has three recesses into which the bottoms of the flat capacitors 40 are fitted and in close contact with each other. And a fastening portion 232 projecting to the end face.
【００２４】接続部材１４は、各偏平形コンデンサ４０
の正の電極端子４１と高位直流入力端子１２とを接続す
るものであり、正の電極端子４１が締結される立壁部１
４１と、高位直流入力端子１２が接続される端子部１４
２とを有している。接続部材１６も同様に、各偏平形コ
ンデンサ４０の負の電極端子４２と低位直流入力端子１
３とを接続するものであり、負の電極端子４２が締結さ
れる立壁部１６１と、低位直流入力端子１３が接続され
る端子部１６２とを有している。The connecting member 14 is formed of each flat capacitor 40
For connecting the positive electrode terminal 41 to the high-order DC input terminal 12, and the upright wall portion 1 to which the positive electrode terminal 41 is fastened.
41 and a terminal section 14 to which the high-order DC input terminal 12 is connected
And 2. Similarly, the connection member 16 is connected to the negative electrode terminal 42 of each flat capacitor 40 and the low-order DC input terminal 1.
3 and has an upright wall portion 161 to which the negative electrode terminal 42 is fastened and a terminal portion 162 to which the low-order DC input terminal 13 is connected.
【００２５】１８は、両接続部材１４，１６間に介挿さ
れる樹脂薄板からなる絶縁スペーサであり、絶縁スペー
サ１８は両接続部材１４，１６に密着している。 （作用効果）以下、上記説明した実施例の装置の作用効
果を説明する。 ・三相インバータ回路６の上方に三つの偏平形コンデン
サ４０を、その厚さ方向が基板２０の面方向と直角とな
るように並べたので、三相インバータ回路６から外部に
放射される電磁波ノイズを低減することができる。な
お、三相インバータ回路６の底面側からの電磁波ノイズ
の放射は基板２０により、側面からの放射はホルダ２
３、接続部材１４，１６で低減される。 ・たとえばエンジンの点火ノイズなどの外部から制御回
路７に入射する電磁波ノイズは上記と同様に偏平形コン
デンサ４０、基板２０、ホルダ２３、接続部材１４，１
６により良好に低減される。 ・偏平形コンデンサ４０の正、負の電極端子４１，４２
は、同一容量の円筒形コンデンサに比較して、電源平滑
用コンデンサ搭載型インバータ装置において、高位直流
入力端子１２および低位直流入力端子１３からの高さを
減らすことができ、その分だけ、接続部材１４，１６の
インダクタンス、電気抵抗を低減し、ＩＧＢＴモジュー
ル５の高速スイッチング時のサージ電圧を低減すること
ができ、電磁放射も低減することができる。 ・上記と同一理由で、偏平形コンデンサ４０を上記姿勢
で配置することにより、インバータ装置２の体格を縮小
することができる。 ・ホルダ２３は一体に形成されているので、従来のよう
に三つの電源平滑用コンデンサを別々に固定する場合に
比較して、部品点数および電源平滑用コンデンサ固定作
業を簡素化することができる。特に、各電源平滑用コン
デンサの位置決めが容易となる。 ・ホルダ２３をアルミ製とするので、偏平形コンデンサ
４０の放熱性を向上し、その寿命を延長することができ
る。 ・電源平滑用コンデンサの保持部２３１は、各偏平形コ
ンデンサ４０の底部が嵌入する凹部を有するので、組み
付けの際の位置合わせも良好となるとともに、この実施
例ではホルダ２３をアルミ製としたので、各電源平滑用
コンデンサからホルダ（電源平滑用コンデンサ支持部
材）２３への放熱を一層良好にできる。 ・制御回路基板７０は各偏平形コンデンサ４０と基板２
０との間にて基板２０と平行に配設されているので、必
要スペースを低減できるとともに、電磁波ノイズ耐性を
向上することができる。 ・大面積の板からなる接続部材１４，１６は、間に薄い
誘電板（樹脂板）１８を挟んで密着されているので、そ
れらの間の静電容量を増加させて、この接続部材１４，
１６のインダクタンスによりサージ電圧発生を良好に抑
止することができる。なお、この意味で、樹脂板１８は
できるだけ静電容量が大きい素材で形成するほうが好ま
しい。Reference numeral 18 denotes an insulating spacer made of a thin resin plate interposed between the connecting members 14 and 16, and the insulating spacer 18 is in close contact with the connecting members 14 and 16. (Operation and Effect) The operation and effect of the apparatus of the above-described embodiment will be described below. The three flat capacitors 40 are arranged above the three-phase inverter circuit 6 so that the thickness direction thereof is perpendicular to the surface direction of the substrate 20, so that electromagnetic noise radiated to the outside from the three-phase inverter circuit 6 Can be reduced. The radiation of electromagnetic noise from the bottom side of the three-phase inverter circuit 6 is performed by the substrate 20, and the radiation from the side is
3, reduced by the connecting members 14 and 16. Electromagnetic noise that enters the control circuit 7 from the outside, such as engine ignition noise, is output from the flat capacitor 40, the board 20, the holder 23, and the connection members 14, 1 in the same manner as described above.
6 is excellently reduced. . Positive and negative electrode terminals 41 and 42 of the flat capacitor 40
Can reduce the height from the high-order DC input terminal 12 and the low-order DC input terminal 13 in the power supply smoothing capacitor-equipped inverter device as compared with the cylindrical capacitor having the same capacity. It is possible to reduce the inductances and electrical resistances of the IGBT module 14 and 16, reduce the surge voltage at the time of high-speed switching of the IGBT module 5, and reduce the electromagnetic radiation. For the same reason as described above, the physique of the inverter device 2 can be reduced by arranging the flat capacitor 40 in the above posture. Since the holder 23 is integrally formed, the number of components and the operation of fixing the power supply smoothing capacitor can be simplified as compared with the case where three power supply smoothing capacitors are separately fixed as in the related art. In particular, the positioning of each power supply smoothing capacitor is facilitated. -Since the holder 23 is made of aluminum, the heat dissipation of the flat capacitor 40 can be improved, and the life thereof can be extended. Since the holding portion 231 of the power supply smoothing capacitor has a concave portion into which the bottom of each flat capacitor 40 fits, the alignment at the time of assembling becomes good, and in this embodiment, the holder 23 is made of aluminum. Further, heat radiation from each power supply smoothing capacitor to the holder (power supply smoothing capacitor support member) 23 can be further improved. The control circuit board 70 is composed of each flat capacitor 40 and the board 2
Since it is disposed in parallel with the substrate 20 between 0 and 0, the required space can be reduced and the electromagnetic wave noise resistance can be improved. Since the connecting members 14 and 16 made of large-area plates are in close contact with a thin dielectric plate (resin plate) 18 interposed therebetween, the capacitance between them is increased, and the connecting members 14 and 16 are increased.
The generation of surge voltage can be favorably suppressed by the inductance of 16. In this regard, it is preferable that the resin plate 18 be formed of a material having the largest possible capacitance.
【図１】本発明の電源平滑用コンデンサ搭載型インバー
タ装置を採用するハイブリッド車の走行モ−タ制御装置
の一実施例を示す回路図である。FIG. 1 is a circuit diagram showing an embodiment of a traveling motor control device for a hybrid vehicle employing a power supply smoothing capacitor mounted inverter device of the present invention.
【図２】図１に示す電源平滑用コンデンサ搭載型インバ
ータ装置の端子側からみた模式斜視図である。FIG. 2 is a schematic perspective view of the inverter device equipped with a power smoothing capacitor shown in FIG. 1 as viewed from a terminal side.
【図３】図２に示す電源平滑用コンデンサ搭載型インバ
ータ装置の側面図である。FIG. 3 is a side view of the inverter device equipped with a power smoothing capacitor shown in FIG. 2;
【図４】図２に示す電源平滑用コンデンサ搭載型インバ
ータ装置のホルダ側からみた摸式斜視図である。4 is a schematic perspective view of the inverter device equipped with a power smoothing capacitor shown in FIG. 2 as viewed from a holder side.
【図５】従来の電源平滑用コンデンサ搭載型インバータ
装置の斜視図である。FIG. 5 is a perspective view of a conventional inverter device equipped with a power supply smoothing capacitor.
４は電源平滑用コンデンサ、 ６は三相インバータ回路（インバータ部）、 ７は制御回路、 １２は相インバータ回路の高位直流入力端子、 １３は相インバータ回路の低位直流入力端子、 １４は接続部材（高位側接続部材）、 １６は接続部材（低位側接続部材）、 ２０は基板、 ２２は柱部（金属部材）、 ２３はホルダ（電源平滑用コンデンサ支持部材）、 ４１は偏平形コンデンサ４０の正の電極端子、 ４２は偏平形コンデンサ４０の負の電極端子、 ４０は電源平滑用コンデンサ４をなす偏平形コンデン
サ、 ７０は制御回路基板、 ２３１はホルダ２３の保持部Reference numeral 4 denotes a power supply smoothing capacitor, 6 denotes a three-phase inverter circuit (inverter unit), 7 denotes a control circuit, 12 denotes a high-order DC input terminal of the phase inverter circuit, 13 denotes a low-order DC input terminal of the phase inverter circuit, and 14 denotes a connecting member ( 16 is a connection member (lower connection member), 20 is a substrate, 22 is a column (metal member), 23 is a holder (power supply smoothing capacitor support member), 41 is a positive capacitor of the flat capacitor 40. 42, a negative electrode terminal of the flat capacitor 40; 40, a flat capacitor forming the power supply smoothing capacitor 4; 70, a control circuit board; 231, a holder for the holder 23
Claims (5)
子が直列接続されてなる相インバータ回路を多数有する
多相インバータ回路が基板に実装されてなるインバータ
部、電源平滑用コンデンサ、及び、 前記各相インバータ回路の高低直流入力端と前記電源平
滑用コンデンサの正、負の電極端子とを導通可能に接続
する高位側接続部材及び低位側接続部材、 を備える電源平滑用コンデンサ搭載型インバータ装置に
おいて、 前記電源平滑用コンデンサは、 その厚さ方向が前記基板の主面方向と略直角となる姿勢
で前記スイッチング素子を覆う偏平形コンデンサからな
ることを特徴とする電源平滑用コンデンサ搭載型インバ
ータ装置。1. An inverter section comprising a multi-phase inverter circuit having a large number of phase inverter circuits in which switching elements of an upper arm and a lower arm are connected in series, mounted on a substrate, a power supply smoothing capacitor, and each of the phase inverters A high-side connection member and a low-side connection member for connecting the high and low DC input terminals of the circuit and the positive and negative electrode terminals of the power supply smoothing capacitor in a conductive manner. An inverter device equipped with a power supply smoothing capacitor, wherein the smoothing capacitor is a flat capacitor that covers the switching element with a thickness direction substantially perpendicular to a main surface direction of the substrate.
型インバータ装置において、 共同して前記スイッチング素子を覆う複数の前記電源平
滑用コンデンサの底部にそれぞれ固着されるコンデンサ
保持部を有して前記電源平滑用コンデンサを支持する電
源平滑用コンデンサ支持部材を有することを特徴とする
電源平滑用コンデンサ搭載型インバータ装置。2. The inverter device equipped with a power supply smoothing capacitor according to claim 1, further comprising: capacitor holding portions respectively fixed to bottoms of said plurality of power supply smoothing capacitors covering said switching element. An inverter device equipped with a power supply smoothing capacitor, comprising a power supply smoothing capacitor supporting member for supporting the power supply smoothing capacitor.
型インバータ装置において、 前記電源平滑用コンデンサ支持部材は、金属部材からな
ることを特徴とする電源平滑用コンデンサ搭載型インバ
ータ装置。3. The inverter device with a power smoothing capacitor according to claim 2, wherein the power smoothing capacitor supporting member is made of a metal member.
サ搭載型インバータ装置において、 前記電源平滑用コンデンサ保持部は、 前記各電源平滑用コンデンサの底部が嵌入する凹部を有
することを特徴とする電源平滑用コンデンサ搭載型イン
バータ装置。4. The inverter device equipped with a power supply smoothing capacitor according to claim 2, wherein the power supply smoothing capacitor holding portion has a concave portion into which a bottom portion of each of the power supply smoothing capacitors fits. Inverter with built-in capacitor for power supply smoothing.
ンサ搭載型インバータ装置において、 前記多相インバータ回路を制御する制御回路が実装され
る制御回路基板を有し、前記制御回路基板は、前記電源
平滑用コンデンサと前記インバータ部との間に前記イン
バータ部の基板とほぼ平行に配設されていることを特徴
とする電源平滑用コンデンサ搭載型インバータ装置。5. The inverter device equipped with a capacitor for smoothing a power supply according to claim 3, further comprising a control circuit board on which a control circuit for controlling the multi-phase inverter circuit is mounted. An inverter device equipped with a power supply smoothing capacitor, which is disposed between the power supply smoothing capacitor and the inverter unit substantially in parallel with a substrate of the inverter unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31364798A JP4038899B2 (en) | 1998-11-04 | 1998-11-04 | Inverter with built-in capacitor for power smoothing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31364798A JP4038899B2 (en) | 1998-11-04 | 1998-11-04 | Inverter with built-in capacitor for power smoothing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000152662A true JP2000152662A (en) | 2000-05-30 |
| JP4038899B2 JP4038899B2 (en) | 2008-01-30 |
Family
ID=18043835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31364798A Expired - Fee Related JP4038899B2 (en) | 1998-11-04 | 1998-11-04 | Inverter with built-in capacitor for power smoothing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4038899B2 (en) |
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