Patent ID: 8274807

Claim:
A power conversion device, comprising: first and second power conversion units each including a switching element for performing electric power conversion; first and second lead members for electricity connecting said first and second power conversion units together; and a first capacitor for smoothing a voltage between said first and second lead members, wherein said first lead member is divided into a first lead portion having one end connected to said first power conversion unit and the other end coupled to a lead member for forming an electric contact with one of terminals of said first capacitor, and a second lead portion having one end connected to said second power conversion unit and the other end coupled to the lead member for forming the electric contact with the one terminal of said first capacitor, said second lead member is divided into a third lead portion having one end connected to said first power conversion unit and the other end coupled to a lead member for forming an electric contact with the other terminal of said first capacitor, and a fourth lead portion having one end connected to said second power conversion unit and the other end coupled to the lead member for forming the electric contact with the other terminal of said first capacitor, said first lead member is a bus bar forming a power supply line, said first lead portion is a first bus bar, and said second lead portion is a second bus bar, said second lead member is a bus bar forming an earth line, said third lead portion is a third bus bar, said fourth lead portion is a fourth bus bar, each of said first and second lead members having integrally planar structures in a semiconductor module, one end of said first bus bar is connected to said first power conversion unit via a first switching member of said first power conversion unit and the other end of said first bus bar is coupled to the lead member for forming an electric contact with one of terminals of said first capacitor, and one end of said third bus bar is connected to said first power conversion unit via a second switching member of said first power conversion unit and the other end of said third bus bar is connected to the lead member for forming an electric contact with the other terminal of said first capacitor.