US Patent No. 9,992,915

POWER CONVERSION DEVICE


Patent No. 9,992,915
Issue Date June 05, 2018
Title Power Conversion Device
Inventorship Takahiro Shimura, Hitachinaka (JP)
Akira Matsushita, Hitachinaka (JP)
Shinichi Fujino, Hitachinaka (JP)
Assignee Hitachi Automotive Systems, Ltd., Hitachinaka-shi (JP)

Claim of US Patent No. 9,992,915

1. A power conversion device comprising:a first power semiconductor module;
a second power semiconductor module; and
a fixing member which fixes the first power semiconductor module, wherein
the first power semiconductor module has a first power semiconductor device, a first case which houses the first power semiconductor device, and a first flange portion fixed to and in contact with the first case,
the second power semiconductor module has a second power semiconductor device, and a second case which houses the second power semiconductor device,
the second case is fixed to and in contact with the first flange portion so as to provide a first flow path space for allowing a coolant to flow between the second case and the first case,
the first flange portion is fixed to the fixing member while supporting the first case and the second power semiconductor module,
the first case has a first fin, and a first fin base connected to the first fin,
the second case has a second fin, and a second fin base connected to the second fin,
the first fin is formed, in the first flow path space, to have a distal end portion located closer to the second fin base than a connection portion between the first fin and the first fin base, and
the second fin is formed, in the first flow path space, to have a distal end portion located closer to the first fin base than a connection portion between the second fin and the second fin base.