ELECTRICAL POWER CONVERSION APPARATUS

To prevent wires from coming into contact with each other in time of usage.SOLUTION: An electrical power conversion apparatus 1 includes a sealing member 8 that seals an accommodation area 4e of a case 4, and includes a sealing interface located above respective top points of wires 30c and 30d included in a semiconductor unit 2b. The electrical power conversion apparatus 1 further includes a buffering member 6c which extends in a predetermined direction in a planar view, and in which a buffering bottom surface 6c3 is above the top points of the wires 30c and 30d, and at least the buffering bottom surface 6c3 locates below the sealing interface 8a in a side view. When the electrical power conversion apparatus 1 is driven, for example a current is applied to heat the wire 30d, extension of the wire 30d caused by expansion of the sealing member 8 around the wire 30d caused by heat of the wire 30d is buffered (restricted) by the buffering member 6.SELECTED DRAWING: Figure 12 【課題】利用時のワイヤ同士の接触を防止する。【解決手段】電力変換装置１はケース４の収納領域４ｅを封止し、半導体ユニット２ｂに含まれるワイヤ３０ｃ，３０ｄのそれぞれの頂点よりも上方に位置する封止界面を含む封止部材８を含む。さらに、電力変換装置１は、平面視で所定の方向に延伸し、側面視で緩衝底面６ｃ３がワイヤ３０ｃ，３０ｄの頂点よりも上方であって、少なくとも緩衝底面６ｃ３が封止界面８ａよりも下方に位置する緩衝部材６ｃを含む。電力変換装置１が駆動して、例えば、電流が印加されてワイヤ３０ｄが発熱し、ワイヤ３０ｄの熱によるワイヤ３０ｄの周りの封止部材８の膨張によるワイヤ３０ｄの広がりが、緩衝部材６により緩衝（制限）される。【選択図】図１２