JP2017208547A - ハーフブリッジを設けるパワーモジュール、ならびにパワーモジュールおよびキャパシタの配置 - Google Patents
ハーフブリッジを設けるパワーモジュール、ならびにパワーモジュールおよびキャパシタの配置 Download PDFInfo
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- 239000003990 capacitor Substances 0.000 title claims description 36
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Abstract
Description
電気変換器では、転流ループの漂遊インダクタンスによってスイッチの間で電圧がオーバーシュートし、リンギングによるEMIが発生し、スイッチング損失が増加する。さらに、ワイドバンドギャップ半導体パワーモジュールを用いた経験によると、電力回路のリンギングによってゲート回路に高周波数ノイズが生じることもあり、これによって、半導体スイッチの制御性が低下し、より精密なゲートドライバが必要になることが分かっている。パワーモジュールは転流ループの一部であってもよいため、その漂遊インダクタンスを最小限に抑えることが重要なことがある。
本発明の目的は、低漂遊インダクタンスのパワーモジュールを提供することである。
図1は、片側に基板12と金属化層14とを備えるパワーモジュール10を示す。金属化層14は、異なる金属化領域、特に、縦方向Lに延在して横方向Cに隣に配置された内側金属化領域16、2つの中間金属化領域18、および2つの外側金属化領域20に分離されている。金属化層14はさらなる金属化領域を備えるが、これは以下で説明される。
基板12および金属化領域の設計は、図5に示す同軸端子構造と組み合わせることができる。同軸端子構造は、3つの並列DC端子60、62を備える。これらの端子は、同一平面に配置されている、および/または、パワーモジュール10の縦方向Lに延在する。特に、内側DC端子60は、内側DC接触領域42に電気的に接続、たとえば接合され、2つの外側DC端子62は外側DC接触領域44に電気的に接続、たとえば接合される。2つの外側DC端子62は同じDC電位(たとえばDC+)に接続し、内側DC端子60は逆のDC電位(たとえばDC−)に接続してもよい。端子構造、および特に1つの内側DC端子60は、2つの別々のDC端子の並列接続と想定してもよい。また、1つの内側金属化領域16は、2つの別の金属化領域の並列接続として想定してもよい。
10 パワーモジュール
12 基板
14 金属化層
16 内側金属化領域
18 中間金属化領域
20 外側金属化領域
22 半導体スイッチの内側の組/列
24 半導体スイッチ
26 ワイヤボンド
28 半導体スイッチの外側の組/列
30 AC接触領域
32 ハーフブリッジ
34 ハーフブリッジの第1の腕
36 ハーフブリッジの第2の腕
38 DC側
40 AC側
42 内側DC接触領域
44 外側DC接触領域
46 内側ゲート接触領域
48 外側ゲート接触領域
50 ブリッジ領域
56 凸部
60 内側DC端子
62 外側DC端子
64 AC端子
66 入れ物
68 パワーモジュールおよびキャパシタの配置
70 キャパシタ素子
71 筐体
72 第1の端子
74 第2の端子
76 デカップリングキャパシタ
Claims (15)
- ハーフブリッジ(32)を設けるパワーモジュール(10)であって、
前記パワーモジュール(10)は、少なくとも1つの基板(12)と、内側金属化領域(16)と、2つの中間金属化領域(18)と、2つの外側金属化領域(20)とを備え、これらの各々は前記少なくとも1つの基板(12)の縦方向(L)に延在し、
前記2つの中間金属化領域(18)は、前記少なくとも1つの基板(12)の横方向(C)に対して内側金属化領域(16)のそばに配置され、各外側金属化領域(20)は前記横方向(C)に対して前記2つの中間金属化領域(18)のうちの1つのそばに配置され、
前記パワーモジュール(10)は半導体スイッチ(24)の2つの内側の組(22)を備え、半導体スイッチ(24)の各内側の組(22)は、半導体スイッチ(24)の前記内側の組(22)がハーフブリッジ(32)の第1の腕(34)を形成するように、中間金属化領域(18)に接合されて前記内側金属化領域(16)に電気的に接続され、
前記パワーモジュール(10)は半導体スイッチ(24)の2つの外側の組(28)を備え、半導体スイッチ(24)の各外側の組(28)は、半導体スイッチ(24)の前記外側の組(24)が前記ハーフブリッジ(32)の第2の腕(36)を形成するように、外側金属化領域(20)に接合されて中間金属化領域(18)と電気的に接続される、パワーモジュール。 - 半導体スイッチ(24)の各内側の組(22)および/または半導体スイッチ(24)の各外側の組(28)は、前記縦方向(L)に延在する列に配置されている、先行する請求項に記載のパワーモジュール(10)。
- 前記パワーモジュール(10)は前記縦方向(L)に並べて配置された少なくとも2つの基板(12)を備え、前記内側金属化領域(16)、前記中間金属化領域(18)、および前記外側金属化領域(20)は、前記少なくとも2つの基板(12)にわたって前記縦方向(L)に分散されている、先行する請求項のいずれか1つに記載のパワーモジュール(10)。
- 前記パワーモジュール(10)は前記横方向(C)に並べて配置された少なくとも2つの基板(12)を備え、前記内側金属化領域(16)は、前記2つの基板(12)にわたって前記横方向(C)に分散されている、先行する請求項のいずれか1つに記載のパワーモジュール(10)。
- 前記2つの外側金属化領域(20)、半導体スイッチ(24)の前記2つの外側の組(28)、前記2つの中間金属化領域(18)、および半導体スイッチ(24)の前記2つの内側の組(22)の配置は、前記内側金属化領域(16)の対称軸(A)に対して鏡像対称である、先行する請求項のいずれか1つに記載のパワーモジュール(10)。
- 前記基板(12)のAC側(40)で、前記中間金属化領域(18)は前記横方向(C)に延在するAC接触領域(30)と電気的に相互接続されている、および/または、
前記中間金属化領域(18)および前記AC接触領域(30)は一体型の金属化領域である、先行する請求項のいずれか1つに記載のパワーモジュール(10)。 - 前記パワーモジュール(10)のDC側(38)で、前記内側金属化領域(16)は内側DC接触領域(42)を設け、前記内側DC接触領域(42)は、前記内側金属化領域(16)のT字形の端部が形成されるように、前記中間金属化領域(18)にわたって前記横方向(C)に延在する、先行する請求項のいずれか1つに記載のパワーモジュール(10)。
- 前記パワーモジュール(10)のDC側(38)で、各外側金属化領域(20)は外側DC接触領域(44)を設け、前記外側DC接触領域(44)は、前記外側金属化領域(20)のL字形の端部が形成されるように、前記中間金属化領域(18)にわたって前記横方向(C)に延在する、先行する請求項のいずれか1つに記載のパワーモジュール(10)。
- 前記外側DC接触領域(44)は、前記パワーモジュール(10)の前記DC側(38)で、前記内側金属化領域(16)にわたって延在する導電体と電気的に相互接続される、先行する請求項のいずれか1つに記載のパワーモジュール(10)。
- 前記内側金属化領域(16)と各中間金属化領域(18)との間に、内側ゲート接触領域(46)が前記基板(12)に設けられており、および/または、
外側ゲート接触領域(48)が各外側金属化領域(20)と隣接した中間金属化領域(18)との間に設けられている、先行する請求項のいずれか1つに記載のパワーモジュール(10)。 - 前記内側金属化領域(16)は前記ハーフブリッジ(32)のDC−接触を設け、前記外側金属化領域(20)は前記ハーフブリッジのDC+接触を設ける、先行する請求項のいずれか1つに記載のパワーモジュール(10)。
- 前記内側金属化領域(16)に電気的に接続された内側DC端子(60)と2つの外側DC端子(62)とをさらに備え、各外側DC端子(62)は外側金属化領域(20)に電気的に接続される、先行する請求項のいずれか1つに記載のパワーモジュール(10)。
- 前記内側DC端子(60)および前記2つのDC端子(62)は1つの平面で延在し、および/または、前記基板(12)から前記縦方向(L)に突出し、および/または、
デカップリングキャパシタが搭載されて前記内側DC端子および外側DC端子に電気的に接続される、請求項12に記載のパワーモジュール(12)。 - 前記内側金属化領域(16)に電気的に接続された少なくとも2つの内側DC端子(60)および/または、
前記外側金属化領域(16)のうちの1つに電気的に接続された少なくとも2つの外側DC端子(62)をさらに備える、請求項12または13に記載のパワーモジュール(10)。 - パワーモジュールおよびキャパシタの配置(68)であって、
請求項13または14に記載の少なくとも1つのパワーモジュール(10)と、
各内側DC端子(60)のための第1のDC端子(72)および各外側DC端子(62)のための2つの第2のDC端子(74)を設けるDCリンクキャパシタ素子(70)とを備え、
1つのパワーモジュール(10)の前記外側DC端子(62)に接続された前記2つの第2のDC端子(74)は、前記パワーモジュール(10)の前記内側DC端子(60)に接続された前記1つの第1のDC端子(72)のそばに配置されている、パワーモジュールおよびキャパシタの配置。
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