JP5796599B2 - 半導体モジュールおよびスイッチング素子の駆動装置 - Google Patents
半導体モジュールおよびスイッチング素子の駆動装置 Download PDFInfo
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Description
図1は半導体モジュールを上面側から見た平面図を模式的に示し、図2は図1のA−A断面を模式的に示し、図3は図1のB−B断面を模式的に示す。また図5はスイッチング素子の駆動装置に適用した場合の回路構成例を示す。
本実施形態では、ドレイン金属板7とソース金属板8とが対向配置され、これらの金属板7,8の電流の通電方向が互いに逆方向になっている。すると、ドレイン金属板7とソース金属板8との間に生じる磁界は強めあうことになり、巻線コイルユニット9の芯材13に強い磁界を生じさせることができる。
図8は第2実施形態を示すもので、前述実施形態と異なるところは、巻線コイルユニット9とドレイン金属板7との間に絶縁板(絶縁体相当)41を設けたところにある。前述実施形態では、コイル14がその芯線に絶縁被覆されている形態を示した。ドレイン金属板7には数百V(例えば600V)程度の電圧が印加される。他方ソース金属板8には前述の電圧ほどの電圧は印加されない。
図9、図10は第3実施形態を示すもので、前述実施形態と異なるところは、ドレイン金属板およびソース金属板がコイルユニットの配置スペースに窪部を対向して備え、コイルユニットがこの窪部に挟持されているところである。
図11は第4実施形態を示すもので、前述実施形態と異なるところは、クランプ用のダイオード34、35をMOSFET2のゲートソース間に付加したところにある。
本発明は、前述実施形態に限定されるものではなく例えば以下に示す変形又は拡張が可能である。
前述実施形態では、コイル14が芯材13に巻回された形態でドレイン金属板7およびソース金属板8に挟持された態様を適用したが、これに代えて、芯材13を用いない空芯コイルを用いても良い。また例えば図12に示す基板コイル52を用いても良い。図12に示す基板コイル52はコイルパターン(コイル相当)50をプリント配線基板51の両面に形成した形態で構成されている。
ソース金属板8、ドレイン金属板7の通電方向は平面的に互いに逆方向(180度)になる形態を示したが、厳密に逆方向でなくても良く、これらの通電方向は平面的に例えば90度を超える鈍角に設定されていても良い。誘導性負荷31を駆動するための駆動装置30に適用したが、特にこれに限られるものではなく、インバータ、DCDCコンバータ、各種の駆動装置、にも適用できる。コイルの巻数、コイルの幅は適宜変更しても良い。
Claims (9)
- 制御端子を備えるスイッチング素子を設けた半導体素子(2)と、
前記半導体素子(2)の主電流を通電し当該主電流を通電する通電経路が対向配置され、それぞれの通電方向が鈍角又は互いに逆方向に配設される主電流配線(7、8)と、
前記対向配置される主電流配線(7、8)に挟持され前記主電流配線に通電されることに応じて生じる磁束を鎖交することにより誘導起電圧を発生し当該誘導起電圧を前記スイッチング素子の制御端子の印加電圧に重畳するコイル(14、50)を有するコイル部(9、52)と、を備えることを特徴とする半導体モジュール。 - 請求項1記載の半導体モジュールにおいて、
前記主電流配線(7、8)は、前記コイル部(9、52)の配置スペースに窪部(7a、8a)を対向して備え、
前記コイル部(9、52)は、前記対向配置される主電流配線(7,8)の窪部(7a、8a)に挟持されることを特徴とする半導体モジュール。 - 請求項1または2記載の半導体モジュールにおいて、
前記コイル部(9、52)と前記主電流配線(7、8)との間に絶縁体(41)が挟持されていることを特徴とする半導体モジュール。 - 請求項1〜3の何れか一項に記載の半導体モジュールにおいて、
前記コイル部(9、52)は、前記コイル(14、50)の巻回端部間の長さが主電流配線(7、8)の配線幅以下の長さに設定され当該主電流配線(7、8)の配線幅内に設置されていることを特徴とする半導体モジュール。 - 請求項1〜4の何れか一項に記載の半導体モジュールにおいて、
前記半導体素子(2)は、前記対向配置される主電流配線(7、8)間に配置されていることを特徴とする半導体モジュール。 - 請求項1〜5の何れか一項に記載の半導体モジュールにおいて、
前記主電流配線(7、8)は、前記コイル部(9、52)を挟持する面とは異なる面をモジュールの露出面とすることで前記半導体素子(2)を冷却させることを特徴とする半導体モジュール。 - 請求項1〜6の何れか一項に記載の半導体モジュールにおいて、
前記コイル部(9)は、芯材(13)が前記コイル(14)内に挿入された巻線コイルユニット(9)により構成されていることを特徴とする半導体モジュール。 - 請求項1〜7の何れか一項に記載の半導体モジュールの半導体素子(2)が制御端子としてのゲート、さらに、ドレイン又はコレクタ、ソース又はエミッタを備えるスイッチング素子(2)により構成され、
前記スイッチング素子(2)のゲートからドレイン又はコレクタ、ソース又はエミッタに相互誘導結合するように電気的に接続され、当該誘導起電圧が前記スイッチング素子のゲートの印加電圧に重畳することを特徴とするスイッチング素子の駆動装置。 - 請求項8記載のスイッチング素子の駆動装置において、
前記誘導起電圧をクランプするツェナーダイオード(34、35)を備えることを特徴とするスイッチング素子の駆動装置。
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