JP2020156310A - パワーモジュール及び電力変換装置 - Google Patents
パワーモジュール及び電力変換装置 Download PDFInfo
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- JP2020156310A JP2020156310A JP2019127856A JP2019127856A JP2020156310A JP 2020156310 A JP2020156310 A JP 2020156310A JP 2019127856 A JP2019127856 A JP 2019127856A JP 2019127856 A JP2019127856 A JP 2019127856A JP 2020156310 A JP2020156310 A JP 2020156310A
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- wiring
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- capacitor
- power module
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Classifications
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Abstract
Description
複数の上下アーム回路(10)が並列して電力ライン(12、13)に接続されてなる電力変換装置(5)に適用されるパワーモジュールであって、
上アーム(10U)及び下アーム(10L)を有する上下アーム回路と、
上下アーム回路に並列接続されたコンデンサ(C1)と、
上下アーム回路を構成する上アーム(10U)及びコンデンサの正極端子を接続する上配線(11Pa)と、
上下アーム回路を構成する下アーム(10L)及びコンデンサの負極端子を電気接続する下配線(11Na)と、
電力ラインに接続される電力配線であって、電力ラインのうち高電位側のライン及び上配線を接続する上電力配線(11P)、及び、電力ラインのうち低電位側のライン及び下配線を接続する下電力配線(11N)と、
を備える。
複数の上下アーム回路(10)が並列接続された電力ライン(12、13)と、
各相それぞれに設けられた上記パワーモジュールと、
を備える。
本実施形態の電力変換装置は、たとえば電気自動車(EV)やハイブリッド自動車(HV)などの車両に適用可能である。以下では、ハイブリッド自動車に適用される例について説明する。
先ず、図1に基づき、電力変換装置が適用される駆動システムの概略構成について説明する。
本実施形態の電力変換装置5に適用可能な半導体装置20の一例について説明する。以下に示す半導体装置20は、上下アーム回路10の一方、すなわち1つのアームを構成するように構成されている。すなわち、2つの半導体装置により、上下アーム回路10が構成される。このような半導体装置20は、1つのアームを構成する要素単位でパッケージ化しているため、1in1パッケージとも称される。半導体装置20は、上アーム10Uと下アーム10Lとで、基本的な構成が同じであり、たとえば共通部品とすることもできる。
本実施形態の電力変換装置5に適用可能なパワーモジュール110の一例について説明する。パワーモジュール110は、上記した1組の並列回路11を構成する。
この実施形態は、先行する実施形態を基礎的形態とする変形例である。上記実施形態では、保護部材180として封止樹脂体の例を示した。これに代えて、この実施形態では、保護部材180としてケース187及び封止材188を用いている。
この実施形態は、先行する実施形態を基礎的形態とする変形例である。上記実施形態では、電力配線(共通配線11N,11P)から上配線11Pa及び下配線11Naへの分岐構造について特に言及しなかった。この実施形態では、熱の影響を考慮して分岐構造が決定されている。
図44では、便宜上、主端子70C,70Eを省略して図示している。図44では、図42同様、X方向において並列配線部133,143の屈曲部が並んでいる。並列配線部133の屈曲部は、共通配線部132,142に対して遠い側に設けられている。並列配線部133の屈曲先端には、接続部137が連なっている。並列配線部133は溶接部133aを有している。並列配線部133は、溶接部133aを含むZ方向延設部分と、正極端子に向けてXY面内を延設された部分を有している。
この実施形態は、先行する実施形態を基礎的形態とする変形例である。第2実施形態では、パワーモジュール110が電流センサ200を備える例を示した。この実施形態では、電流センサ200による電流検出の精度を向上できる構成について説明する。
この実施形態は、先行する実施形態を基礎的形態とする変形例である。この実施形態では、駆動基板160の配置を、先行実施形態とは異ならせている。
この明細書の開示は、例示された実施形態に制限されない。開示は、例示された実施形態と、それらに基づく当業者による変形態様を包含する。たとえば、開示は、実施形態において示された要素の組み合わせに限定されない。開示は、多様な組み合わせによって実施可能である。開示される技術的範囲は、実施形態の記載に限定されない。開示されるいくつかの技術的範囲は、特許請求の範囲の記載によって示され、さらに特許請求の範囲の記載と均等の意味及び範囲内でのすべての変更を含むものと解されるべきである。
Claims (15)
- 複数の上下アーム回路(10)が並列して電力ライン(12、13)に接続されてなる電力変換装置(5)に適用されるパワーモジュールであって、
前記上下アーム回路と、
前記上下アーム回路に並列接続されたコンデンサ(C1)と、
前記上下アーム回路を構成する上アーム(10U)及び前記コンデンサの正極端子を接続する上配線(11Pa)と、
前記上下アーム回路を構成する下アーム(10L)及び前記コンデンサの負極端子を接続する下配線(11Na)と、
前記電力ラインに接続される電力配線であって、前記電力ラインのうち高電位側のライン及び前記上配線を接続する上電力配線(11P)、及び、前記電力ラインのうち低電位側のライン及び前記下配線を接続する下電力配線(11N)と、
を備えるパワーモジュール。 - 前記上アームは、前記上配線に接続される主端子(70C)を複数有し、
前記下アームは、前記下配線に接続される主端子(70E)を複数有する請求項1に記載のパワーモジュール。 - 前記上アームが有する主端子(70E)及び前記下アームが有する主端子(70C)を接続する出力配線(150)を備え、
前記出力配線は、前記上配線及び前記下配線の少なくとも一方と対向する対向部(154p、154n)を有する請求項1または2に記載のパワーモジュール。 - 前記上電力配線及び前記下電力配線は互いに対向配置されている請求項1〜3のいずれか1つに記載のパワーモジュール。
- 前記上下アーム回路は、半導体装置(20,20U,20L)を含んで構成されており、
開口端(187a,187b)を有し、前記半導体装置及び前記コンデンサを収容する筒状のケース(187)と、
前記半導体装置(20,20U,20L)を冷却する冷却器(120)と、
前記半導体装置に駆動信号を出力する駆動基板(160)と、
前記開口端のひとつが前記冷却器及び前記駆動基板の少なくとも一方によって閉塞された状態で前記ケース内に充填され、前記半導体装置及び前記コンデンサの少なくとも一部を封止する封止材(188)と、
をさらに備える請求項1〜4のいずれか1つに記載のパワーモジュール。 - 前記上下アーム回路は、半導体装置(20,20U,20L)を含んで構成されており、
前記半導体装置(20,20U,20L)に積層され、前記半導体装置を冷却する冷却器(120)と、
前記積層の方向に対して直交する一方向に配置され、前記半導体装置に駆動信号を出力する駆動基板(160)と、をさらに備え、
前記半導体装置は、前記一方向に延設されて前記駆動基板に接続され、前記駆動信号が入力される信号端子(80)を有する請求項1〜4のいずれか1つに記載のパワーモジュール。 - 前記上配線及び前記下配線は、対応する前記電力配線との接続点から前記上下アーム回路の対応するアームまでの第1配線部(11Pb,11Nb)と、前記接続点から前記コンデンサの対応する端子までの第2配線部(11Pc,11Nc)と、をそれぞれ有し、
前記上配線及び前記下配線の少なくとも一方において、前記第1配線部の配線抵抗が、前記第2配線部の配線抵抗よりも小さくされている請求項1〜6のいずれか1つに記載のパワーモジュール。 - 前記上下アーム回路は、半導体装置(20,20U,20L)を含んで構成されており、
前記半導体装置に駆動信号を出力する駆動基板(160)と、
前記半導体装置の出力端子に接続された出力配線(150)と、
前記駆動基板に実装され、前記出力配線に流れる電流を検出する電流センサ(200)と、
をさらに備え、
前記出力配線は、一方向に延設され、前記電流センサにより電流が検出される被検出部(155)と、一端が前記被検出部に連なり、前記被検出部とは異なる方向に延設された屈曲部(156)と、を有し、
前記屈曲部は、前記一端とは反対の他端側に設けられ、他の部材が接続される端子部(156a)と、前記端子部から前記被検出部側に延び、前記端子部とともに前記他の部材と対向する対向部(156b)と、を有する請求項1に記載のパワーモジュール。 - 前記電力ラインと、
請求項1〜8のいずれか1つに記載の前記パワーモジュールと、
を備え、
前記パワーモジュールが各相それぞれに設けられている電力変換装置。 - 前記各相のうち第1相に設けられた前記パワーモジュールを第1パワーモジュールとし、
前記各相のうち第2相に設けられた前記パワーモジュールを第2パワーモジュールとし、
前記第1パワーモジュールにおける、前記正極端子から前記上アームまでの電気経路のインピーダンスを相内上インピーダンスとし、
前記第1パワーモジュールに係る前記正極端子から、前記第2パワーモジュールに係る前記上アームまでの電気経路のインピーダンスを相間上インピーダンスとし、
前記相間上インピーダンスが前記相内上インピーダンスより大きい請求項9に記載の電力変換装置。 - 前記各相のうち第1相に設けられた前記パワーモジュールを第1パワーモジュールとし、
前記各相のうち第2相に設けられた前記パワーモジュールを第2パワーモジュールとし、
前記第1パワーモジュールにおける、前記負極端子から前記下アームまでの電気経路のインピーダンスを相内下インピーダンスとし、
前記第1パワーモジュールに係る前記負極端子から、前記第2パワーモジュールに係る前記下アームまでの電気経路のインピーダンスを相間下インピーダンスとし、
前記相間下インピーダンスは前記相内下インピーダンスより大きい請求項9または10に記載の電力変換装置。 - 前記上下アーム回路に並列に接続され、前記電力ラインの電圧を平滑化する平滑コンデンサ(C2)を備える請求項9〜11のいずれか1つに記載の電力変換装置。
- 前記コンデンサの容量は、前記平滑コンデンサの容量より小さい請求項12に記載の電力変換装置。
- 前記電力ラインと、
請求項8に記載の前記パワーモジュールと、
前記他の部材である導電部材(241,251)と、
を備え、
前記パワーモジュールが各相それぞれに設けられており、
前記バスバーは、前記出力配線の前記端子部に接続された接続部(241a,251a)と、前記接続部から延びる延設部(241b,251b)と、を有し、
前記接続部、及び、前記延設部において前記接続部から所定範囲の部分が、前記出力配線の前記端子部及び前記対向部に対向配置されている電力変換装置。 - 前記バスバーの前記延設部は、経路の途中で屈曲しており、
前記バスバーにおいて、屈曲部位よりも前記接続部側の前記延設部及び前記接続部の延設長さが、前記出力配線において、前記対向部及び前記端子部の延設長さと、等しくされている請求項14に記載の電力変換装置。
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