JP6320433B2 - 電力用半導体モジュール - Google Patents
電力用半導体モジュール Download PDFInfo
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- JP6320433B2 JP6320433B2 JP2015562569A JP2015562569A JP6320433B2 JP 6320433 B2 JP6320433 B2 JP 6320433B2 JP 2015562569 A JP2015562569 A JP 2015562569A JP 2015562569 A JP2015562569 A JP 2015562569A JP 6320433 B2 JP6320433 B2 JP 6320433B2
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- electrode
- positive
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- power semiconductor
- semiconductor module
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- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 claims description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 4
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- Inverter Devices (AREA)
Description
図1は、この発明の実施の形態1の電力用半導体モジュールの上面模式図、および概略側面図である。図1(a)には、電力用半導体モジュール100の上面模式図を示す。図1(b)には、図1(a)におけるB側から見た場合の、図1(c)には、図1(a)におけるA側から見た場合の概略側面図を示す。また、図2は、この発明の実施の形態1の電力用半導体モジュールの電極を取り除いた場合の上面図である。さらに、図3は、この発明の実施の形態1の電力用半導体モジュールの上面外観図である。ここで、B側から見た方向をB方向、A側から見た方向をA方向とする。
本実施の形態2においては、実施の形態1で用いた1枚の絶縁基板を複数枚の絶縁基板として回路を構成した点が異なる。このように複数枚の絶縁基板を用いた回路においても、正極電極10、負極電極11、および交流電極12をそれぞれが対向するように配置したのでインダクタンスを低減することができる。
本実施の形態3においては、実施の形態2で用いた正極端子40と負極端子41を電力用半導体モジュールの中央部に配置した点が異なる。このように、正極端子と負極端子を電力用半導体モジュールの中央部に配置することで、正極端子40から負極端子41を通る転流ループ発生時に、電力用半導体モジュールに搭載される複数の絶縁基板2に対して電流の経路長を均等化し、配線インダクタンス、及び配線抵抗の均等化が図れる。これにより、各絶縁基板2の配線パターン3,4に流れる電流のばらつきを抑制することができ、各絶縁基板2に搭載された自己消弧型半導体素子や還流ダイオードなど半導体素子の電流ばらつきを抑制することが可能となる。また、電流ばらつきを抑制することで、半導体素子の温度ばらつきを抑制することができ、熱サイクル寿命の向上が可能となる。
本実施の形態4においては、実施の形態1〜3で用いた2in1モジュールを用いて3レベル回路を構成した点が異なる。このように、3レベル回路を構成した場合でも、正極電極10、負極電極11、および交流電極12を、それぞれが対向するように配置したので、3レベル回路の動作時に、正極電極10、負極電極11、および交流電極12との間のそれぞれの対向部分で互いにdi/dtの向きが逆になり磁束のキャンセルが行われ、正極電極10、負極電極11、および交流電極12のそれぞれの対向部分でインダクタンスの低減が可能となる。
Claims (17)
- 自己消弧型半導体素子を直列接続して構成され、前記自己消弧型半導体素子の直列接続点を有する正アームおよび負アームとしての正負アームと、
前記正負アームに接続される正極側電極、負極側電極、および交流電極と、
前記正負アームの前記自己消弧型半導体素子と前記正極側電極、前記負極側電極、および前記交流電極とを接続する配線パターンが形成された基板とを備え、
前記正極側電極、前記負極側電極、および前記交流電極のそれぞれは、前記基板の前記配線パターンが形成された面に対して平行に配置された平行面部を含み、
前記正極側電極、前記負極側電極、および前記交流電極の前記平行面部は、前記基板の上において前記基板から離間して配置され、
前記基板と、前記正極側電極、前記負極側電極、および前記交流電極の前記平行面部とは、封止材を介して互いに絶縁され、
前記正極側電極、前記負極側電極、および前記交流電極は互いに絶縁され、前記正極側電極、前記負極側電極、および前記交流電極のうち任意の2つが互いに間隔をあけて対向するように配置されたことを特徴とする電力用半導体モジュール。 - 前記正極側電極および前記負極側電極のそれぞれは、前記基板の前記配線パターンが形成された面に対して垂直に配置された垂直面部を含み、
前記正極側電極の前記垂直面部は、前記負極側電極の前記垂直面部と対向して平行に配置され、
前記交流電極の前記平行面部は、前記正極側電極の前記平行面部と前記負極側電極の前記平行面部とのそれぞれと互いに対向して平行に配置されたことを特徴とする請求項1に記載の電力用半導体モジュール。 - 前記正極側電極、前記負極側電極、および前記交流電極のそれぞれは、外部回路に接続される端子部と、前記配線パターンに接続し前記平行面部から分岐された複数の分岐電極部とを含み、
前記分岐電極部は前記平行面部と同一の平面部を有し、
前記基板と前記分岐電極部の前記平行面部とは絶縁され、
前記分岐電極部の前記平行面部は前記基板の上に配置され、
前記正極側電極の前記分岐電極部と前記交流電極の前記分岐電極部とは互いに絶縁され、かつ前記正極側電極の前記分岐電極部の少なくとも一部と前記交流電極の前記分岐電極部の少なくとも一部とは同一形状で対向するように配置され、
前記負極側電極の前記分岐電極部と前記交流電極の前記分岐電極部とは互いに絶縁され、かつ前記負極側電極の前記分岐電極部の少なくとも一部と前記交流電極の前記分岐電極部の少なくとも一部とは同一形状で対向するように配置されることを特徴とする請求項1または2に記載の電力用半導体モジュール。 - 前記基板は、複数であり、
前記分岐電極部は、前記複数の基板に対応して複数設けられ、
前記正極側電極の前記端子部から前記正極側電極の前記分岐電極部を経由した前記配線パターンまでの距離と、前記負極側電極の前記端子部から前記負極側電極の前記分岐電極部を経由した前記配線パターンまでの距離とは等距離であることを特徴とする請求項3に記載の電力用半導体モジュール。 - 前記正極側電極、前記負極側電極、および前記交流電極のそれぞれに含まれる前記複数の分岐電極部は、前記正極側電極、前記負極側電極、および前記交流電極のそれぞれの長辺を起点としたV字形状であることを特徴とする請求項3または請求項4に記載の電力用半導体モジュール。
- 前記平行面部は長方形の形状であり、前記長方形の長辺部に前記分岐電極部が配置されたことを特徴とする請求項3〜5のいずれか1項に記載の電力用半導体モジュール。
- 前記交流電極の前記端子部は、前記正極側電極の前記端子部と前記負極側電極の前記端子部とに前記交流電極の前記端子部の同一辺側で対向して配置されたことを特徴とする請求項3〜6のいずれか1項に記載の電力用半導体モジュール。
- 前記正極側電極および前記負極側電極は、スリットを有し、前記正極側電極の前記端子部および前記負極側電極の前記端子部から前記配線パターンまでの距離が等距離であり、前記配線パターンを並列接続したことを特徴とする請求項7に記載の電力用半導体モジュール。
- 前記交流電極の前記端子部は、前記正アームおよび前記負アームに跨って配置されたことを特徴とする請求項7または請求項8に記載の電力用半導体モジュール。
- 前記電力用半導体モジュールの外形に四角形の面を有し、
前記正極側電極の前記端子部と前記負極側電極の前記端子部とが、前記四角形の面内の中央部に配置されたことを特徴とする請求項3〜9のいずれか1項に記載の電力用半導体モジュール。 - 自己消弧型半導体素子を直列接続して構成され、前記自己消弧型半導体素子の直列接続点を有する正アームおよび負アームとしての正負アームと、
前記正負アームに接続される正極側電極、負極側電極、および交流電極と、
前記正負アームの前記自己消弧型半導体素子と前記正極側電極、前記負極側電極、および前記交流電極とを接続する配線パターンが形成された基板と、
前記正極側電極、前記負極側電極、および前記交流電極のそれぞれに含まれ、外部回路に接続される端子部とを備え、
電力用半導体モジュールの外形に四角形の面を有し、
前記正アーム上に配置された前記正極側電極の前記端子部と前記負アーム上に配置された前記負極側電極の前記端子部とが、前記四角形の面内の中央部に配置され、前記交流電極の前記端子部は、前記四角形の面内で前記正アーム上および前記負アーム上に跨って配置されたことを特徴とする電力用半導体モジュール。 - 前記正極側電極の前記端子部と前記交流電極の前記端子部との距離と、前記負極側電極の前記端子部と前記交流電極の前記端子部との距離が等距離であることを特徴とする請求項8〜11のいずれか1項に記載の電力用半導体モジュール。
- 前記正負アームとして前記基板を複数備えたことを特徴とする請求項1〜12のいずれか1項に記載の電力用半導体モジュール。
- 前記自己消弧型半導体素子に対して逆並列に接続されるように前記配線パターンに接合されるダイオードを有し、
前記正負アームは、前記自己消弧型半導体素子と前記ダイオードとの並列回路を直列接続して構成されることを特徴とする請求項1〜13のいずれか1項に記載の電力用半導体モジュール。 - 前記ダイオードが珪素よりバンドギャップが広いワイドギャップ半導体で形成されることを特徴とする請求項14に記載の電力用半導体モジュール。
- 前記自己消弧型半導体素子が珪素よりバンドギャップの広いワイドギャップ半導体で形成されることを特徴とする請求項1〜15のいずれか1項に記載の電力用半導体モジュール。
- 前記ワイドギャップ半導体は、炭化珪素、窒化ガリウム材料、およびダイヤモンドのうちのいずれか1つであることを特徴とする請求項15または請求項16に記載の電力用半導体モジュール。
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