POWER CONVERSION DEVICE

摘要

Disclosed are an effective configuration in the case where a plurality of switching elements are connected in parallel and the effective structure of a fin of a cooling device in a power conversion device which allows the switching elements to be cooled with aerodynamic drag. A cooling device (50A) comprises at least a fin base (40A) which offers a switching element mounting surface and a plurality of fins (42A) arranged on a surface opposed the mounting surface. Each fin (42A) is arranged in contact with outer air in order to discharge heat. When the power conversion circuit is a single-phase or polyphase bridge circuit having a plurality of pairs of legs comprising positive side arms (UPC, VPC) and negative side arms (UNC, VNC), pairs (UPC and UNC, and VPC and VNC) of the switching elements constituting the legs of the phase are sequentially arranged in line in a traveling direction of an electric car on the fin base (40A).