Electric circuit device, electric circuit module, and power converter

摘要

The present invention provides an electric circuit device in which it is possible to achieve simultaneously the improvement of cooling performance and reduction in operating loss due to line inductance. The above object can be attained by constructing multiple plate-like conductors so that each of these conductors electrically connected to multiple semiconductor chips is also thermally connected to both chip surfaces of each such semiconductor chip to release heat from the chip surfaces of each semiconductor chip, and so that among the above conductors, a DC positive-polarity plate-like conductor and a DC negative-polarity plate-like conductor are opposed to each other at the respective conductor surfaces.

主权项

1. A power converter comprising:
an electric circuit device having a plurality of semiconductor chips, a first heat release section, and a second heat release section facing said first heat release section with said plurality of semiconductor chips disposed between said first heat release section and said second release section; a P-electrode connected to said electric circuit device; a connection member containing a first nut; a N-electrode connected to said electric circuit device, facing said P-electrode, and disposed so that said connection member is sandwiched between said P-electrode and said N-electrode; a heat release base having flow channels permitting flow of a cooling medium; and a capacitor block having a first capacitor terminal and a second capacitor terminal; wherein said electric circuit device is located such that said first heat release section and said second heat release section are located between said flow channels, said capacitor, block is located adjacent to said heat release base, a first screw connected to said first nut fixes said N-electrode to said connection member, said first capacitor terminal is directly connected to said P-electrode, and said second capacitor terminal is directly connected to said N-electrode.