JP7407675B2 - パワー半導体モジュールおよび電力変換装置 - Google Patents
パワー半導体モジュールおよび電力変換装置 Download PDFInfo
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- JP7407675B2 JP7407675B2 JP2020138037A JP2020138037A JP7407675B2 JP 7407675 B2 JP7407675 B2 JP 7407675B2 JP 2020138037 A JP2020138037 A JP 2020138037A JP 2020138037 A JP2020138037 A JP 2020138037A JP 7407675 B2 JP7407675 B2 JP 7407675B2
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- 238000006243 chemical reaction Methods 0.000 title claims description 14
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- 125000006850 spacer group Chemical group 0.000 claims description 146
- 239000000758 substrate Substances 0.000 claims description 124
- 238000009413 insulation Methods 0.000 claims description 24
- 230000008878 coupling Effects 0.000 claims description 15
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- 238000010586 diagram Methods 0.000 description 12
- 230000008901 benefit Effects 0.000 description 10
- 239000012212 insulator Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 5
- 229910010271 silicon carbide Inorganic materials 0.000 description 5
- 229910002601 GaN Inorganic materials 0.000 description 4
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
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- 230000005611 electricity Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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- 229910052710 silicon Inorganic materials 0.000 description 1
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- 238000005245 sintering Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
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Description
図1Aに、本実施例のパワー半導体モジュール1の概略構成を示す。なお、図1Aでは、本来見えない下層の部品配置について、便宜上点線でその配置を明示することを、予め述べておく。図1Aは、パワー半導体モジュール1を上方からみた平面図と、平面図に記載した断面線A-A’、及び断面線B-B’における2つの断面構造図を示している。
本実施例のパワー半導体モジュール1は、上下に配置された2枚の絶縁基板10,20を用いて構成する。
図1Aに示すように、パワー半導体モジュール1は、スペーサ導体32を複数個備え、複数のスペーサ導体32の間をスペーサ導体間配線部33によって接続する。スペーサ導体間配線部33は、導体パターン23aと対向して配置され、導体パターン23aとの間に、絶縁基板20の平面に垂直の方向に向かって所定の絶縁距離をもって分離される。スペーサ導体間配線部33は、半導体スイッチング素子5の電極7についても、絶縁基板20の平面に垂直の方向に向かって、所定の絶縁距離をもって分離される。
図1Aの平面図は、パワー半導体モジュール1を上方から平面視した図である。説明の都合上、絶縁基板20を図示しない。また、絶縁基板10のうち、絶縁層12とその下面の導体層13も図示しない。
本実施例によって得られる2つの効果について説明する。
(1)半導体スイッチング素子の面実装効率を向上できる
(2)パワー半導体モジュール内の制御配線(ゲート配線)のインダクタンスを低減できる、という2つの特長を有する。
図6Aに、本実施例のパワー半導体モジュール1の概略構成を示す。図6Aは、パワー半導体モジュール1を上方からみた平面図と、平面図に記載した断面線A-A’、及び断面線B-B’における2つの断面構造図を示している。なお、平面図には、説明の都合上、絶縁基板20を図示しない。また、絶縁基板10のうち、絶縁層12とその導体層13も図示しない。
本実施例のパワー半導体モジュール1は、実施例1と同様に、上下に配置された2枚の絶縁基板10,20を用いて構成する。実施例1に対する本実施例の相違点は、スペーサ導体32の構造と、絶縁基板20が備える導体層23の導体パターンの形状である。相違点を中心に、主に断面A-A’図を用いて説明する。
図7Aに、本実施例のパワー半導体モジュール1の概略構成を示す。図7Aは、パワー半導体モジュール1を上方からみた平面図と、平面図に記載した断面線A-A’、及び断面線B-B’における2つの断面構造図を示している。なお、平面図には、説明の都合上、絶縁基板20を図示しない。また、絶縁基板10のうち、絶縁層12とその導体層13も図示しない。
本実施例のパワー半導体モジュール1は、実施例1と同様に、上下に配置された2枚の絶縁基板10,20を用いて構成する。実施例1及び実施例2に対する本実施例の相違点は、スペーサ導体32(32a)の構造と、絶縁基板10が備える導体層11の導体パターン(11a,11b)の形状、そして半導体スイッチング素子5の制御電極8に対してボンディングワイヤ35を介して電気的接続をする点である。相違点を中心に、主に断面A-A’図を用いて説明する。
(1)半導体スイッチング素子5における制御電極8の位置に依らずに、パワー半導体モジュール1内の制御配線(11a)のインダクタンスを低減できる
(2)パワー半導体モジュール1内の制御電極8の配線の電気長(抵抗およびインダクタンス)をほぼ等しく設定できる、という2つの特長を有する。
3,3a,3c,3e:ゲート駆動回路
4:ゲート引き出し部
5:半導体スイッチング素子
6:電極(ドレイン電極)
7:電極(ソース電極)
8:制御電極(ゲート電極)
9,9a,9b,9c,9d:半導体スイッチング素子群
10:絶縁基板
11:導体層
11a:(下側絶縁基板の上部導体のドレイン電極接続用)導体パターン
11b:(下側絶縁基板の上部導体のゲート電極接続用)導体パターン
12:絶縁層
13:導体層
20:絶縁基板
21:導体層
22:絶縁層
23:導体層
23a:(上側絶縁基板の下部導体のソース電極接続用)導体パターン
23b:(上側絶縁基板の下部導体のゲート電極接続用)導体パターン
31:(ソース用)スペーサ導体
32,32a:(ゲート用)スペーサ導体
33:(ゲート用)スペーサ導体間配線部
34:(スペーサ導体用)絶縁体
35:ボンディングワイヤ
51:本発明による制御配線の引き回し構造部
52:従来例による制御配線の引き回し構造部
53:ゲート配線電流
54:ソース配線リターン電流
100,100a,100c,100e:レグ回路
110:バッテリー
140:電動機
150:電力変換装置
160:コンデンサ
170:制御回路
Claims (12)
- 第1の絶縁基板と、
前記第1の絶縁基板上に配置された複数の半導体スイッチング素子と、
前記複数の半導体スイッチング素子を挟んで、前記第1の絶縁基板と対向して配置された第2の絶縁基板と、
前記複数の半導体スイッチング素子と前記第2の絶縁基板との間に配置され、前記複数の半導体スイッチング素子と前記第2の絶縁基板との間のスペーサとなる複数の第1のスペーサ導体および複数の第2のスペーサ導体と、
前記複数の第2のスペーサ導体と一体に形成され、前記複数の第2のスペーサ導体の各々を電気的に接続するスペーサ導体間配線部と、を備え、
前記複数の半導体スイッチング素子の各々は、第1の電極と、前記第1の電極の反対側に設けられた第2の電極および制御電極を有し、
前記第1の電極は、前記第1の絶縁基板上に設けられた第1の導体層に電気的に接続され、
前記第2の電極は、前記第1のスペーサ導体を介して前記第2の絶縁基板上に設けられた第2の導体層に電気的に接続され、
前記制御電極は、前記第2のスペーサ導体および前記スペーサ導体間配線部により互いに電気的に接続され、
前記スペーサ導体間配線部は、前記第2の導体層と所定の距離を有して対向して配置され、
前記複数の第2のスペーサ導体と前記第2の導体層の間に、前記複数の第2のスペーサ導体と共に、前記複数の半導体スイッチング素子と前記第2の絶縁基板との間のスペーサとなる絶縁層を有することを特徴とするパワー半導体モジュール。 - 請求項1に記載のパワー半導体モジュールにおいて、
前記制御電極は、前記第2のスペーサ導体および前記スペーサ導体間配線部により互いに電気的に接続されると共に、前記第2のスペーサ導体を介して前記第2の絶縁基板上に設けられた第3の導体層に電気的に接続されることを特徴とするパワー半導体モジュール。 - 請求項1に記載のパワー半導体モジュールにおいて、
前記所定の距離は、前記スペーサ導体間配線部と前記第2の導体層の電気的な絶縁が可能な絶縁距離であることを特徴とするパワー半導体モジュール。 - 請求項1に記載のパワー半導体モジュールにおいて、
前記制御電極は、ボンディングワイヤを介して、前記第2のスペーサ導体に電気的に接続されることを特徴とするパワー半導体モジュール。 - 請求項1に記載のパワー半導体モジュールにおいて、
前記スペーサ導体間配線部は、前記第2の導体層との間に負性の結合係数によって決定される配線間の相互インダクタンスを形成することを特徴とするパワー半導体モジュール。 - 請求項5に記載のパワー半導体モジュールにおいて、
前記スペーサ導体間配線部と前記第2の導体層との間の結合係数は、-1.0以上、-0.8以下であることを特徴とするパワー半導体モジュール。 - 請求項1に記載のパワー半導体モジュールにおいて、
前記複数の半導体スイッチング素子は、MOSFET型の素子であり、
前記第1の電極はドレイン電極、前記第2の電極はソース電極、前記制御電極はゲート電極であることを特徴とするパワー半導体モジュール。 - 請求項7に記載のパワー半導体モジュールにおいて、
前記複数の半導体スイッチング素子は、SiC-MOSFETであることを特徴とするパワー半導体モジュール。 - 第1の絶縁基板と、
前記第1の絶縁基板上に配置された複数の半導体スイッチング素子と、
前記複数の半導体スイッチング素子を挟んで、前記第1の絶縁基板と対向して配置された第2の絶縁基板と、
前記複数の半導体スイッチング素子と前記第2の絶縁基板との間に配置され、前記複数の半導体スイッチング素子と前記第2の絶縁基板との間のスペーサとなる複数の第1のスペーサ導体および複数の第2のスペーサ導体と、
前記複数の第2のスペーサ導体と一体に形成され、前記複数の第2のスペーサ導体の各々を電気的に接続するスペーサ導体間配線部と、を備え、
前記複数の半導体スイッチング素子の各々は、第1の電極と、前記第1の電極の反対側に設けられた第2の電極および制御電極を有し、
前記第1の電極は、前記第1の絶縁基板上に設けられた第1の導体層に電気的に接続され、
前記第2の電極は、前記第1のスペーサ導体を介して前記第2の絶縁基板上に設けられた第2の導体層に電気的に接続され、
前記制御電極は、前記第2のスペーサ導体および前記スペーサ導体間配線部により互いに電気的に接続され、
前記スペーサ導体間配線部は、前記第2の導体層と所定の距離を有して対向して配置され、
前記制御電極は、ボンディングワイヤを介して、前記第2のスペーサ導体に電気的に接続されることを特徴とするパワー半導体モジュール。 - 第1の絶縁基板と、
前記第1の絶縁基板上に配置された複数の半導体スイッチング素子と、
前記複数の半導体スイッチング素子を挟んで、前記第1の絶縁基板と対向して配置された第2の絶縁基板と、
前記複数の半導体スイッチング素子と前記第2の絶縁基板との間に配置され、前記複数の半導体スイッチング素子と前記第2の絶縁基板との間のスペーサとなる複数の第1のスペーサ導体および複数の第2のスペーサ導体と、
前記複数の第2のスペーサ導体と一体に形成され、前記複数の第2のスペーサ導体の各々を電気的に接続するスペーサ導体間配線部と、を備え、
前記複数の半導体スイッチング素子の各々は、第1の電極と、前記第1の電極の反対側に設けられた第2の電極および制御電極を有し、
前記第1の電極は、前記第1の絶縁基板上に設けられた第1の導体層に電気的に接続され、
前記第2の電極は、前記第1のスペーサ導体を介して前記第2の絶縁基板上に設けられた第2の導体層に電気的に接続され、
前記制御電極は、前記第2のスペーサ導体および前記スペーサ導体間配線部により互いに電気的に接続され、
前記スペーサ導体間配線部は、前記第2の導体層と所定の距離を有して対向して配置され、
前記スペーサ導体間配線部は、前記第2の導体層との間に負性の結合係数によって決定される配線間の相互インダクタンスを形成することを特徴とするパワー半導体モジュール。 - 請求項10に記載のパワー半導体モジュールにおいて、
前記スペーサ導体間配線部と前記第2の導体層との間の結合係数は、-1.0以上、-0.8以下であることを特徴とするパワー半導体モジュール。 - 一対以上の上下アームを有する主回路と、
前記上下アームを駆動する駆動回路と、を備える電力変換装置において、
前記上下アームは、請求項1から11のいずれか1項に記載のパワー半導体モジュールを有することを特徴とする電力変換装置。
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