Patent ID: 8212382

Claim:
A power conversion apparatus comprising: a first power module and a second power module, each of which includes a built-in inverter circuit that includes a positive polarity side semiconductor switch unit and a negative polarity side semiconductor switch unit for each phase; a first wiring board having a three-layer laminated structure comprising a first positive polarity conductor board and a first negative polarity conductor board formed widely in the direction parallel to the direction in which the first and second power modules is arranged and laminated with an insulation layer between the first positive polarity conductor board and the first negative polarity conductor board; a plurality of capacitors connected in parallel between the first positive polarity conductor board and the first negative polarity conductor board; and a second wiring board having a three-layer laminated structure comprising a second positive polarity conductor board and a second negative polarity conductor board formed widely in the direction parallel to the direction in which the first and second power modules are arranged and laminated with an insulation layer between the second positive polarity conductor board and the second negative polarity conductor board and used to connect the positive and negative polarity sides of each of the first and second power modules to the first wiring board.