Patent ID: 7965510
Filing Date: 2011-06-21
Classification: B60K,H01L,H05K,Y02T

Abstract:
1. A power conversion apparatus, comprising: a housing having a cooling jacket; a power module having a semiconductor circuit performing power conversion between DC power and AC power, mounted on a surface thereof, and a radiator disposed on a rear surface; and a fastening device for fixing the power module to the cooling jacket, the fastening device including a front surface side fastening part that fastens the power module to the cooling jacket by fastening operation from the front surface side of the power module, and a rear surface side fastening part that fastens the power module to the cooling jacket by fastening operation from the rear surface side of the power module; wherein, at least one configuration part of the power module is arranged on a front surface area of the power module facing the rear surface side fastening part; the power module includes a metal base, the semiconductor circuit is mounted on the front surface of the metal base and the radiator comprises a radiation fin that is projected from the rear surface; the rear surface side fastening part is arranged to fasten the metal base to the cooling jacket around the semiconductor circuit; and the configuration parts of the power module are arranged around the semiconductor circuit; the rear surface side fastening part comprises a plurality of bolts each having a screw portion that projects from the rear surface of the metal base and is prevented from rotation and nuts screwed with the plurality of bolts at the rear surface side of the power module; the power module further includes a case member disposed to surround the semiconductor circuit at the peripheral edge of the metal base; and the case member is equipped with an engagement portion that is configured to engage with the head of the bolt.