Patent ID: 7851954

Claim:
A vehicle drive device comprising: a rotating electrical machine; a power control unit controlling said rotating electrical machine; a case housing said rotating electrical machine and said power control unit; a damper to which a crankshaft of an internal combustion engine is coupled; and a power transmission mechanism combining power generated by said internal combustion engine with power generated by said rotating electrical machine for transmission to a drive shaft, said power control unit including an inverter driving said rotating electrical machine, a voltage converter configured to have a reactor, for boosting a power supply voltage to apply the boosted voltage to said inverter, and a circuit element substrate on which a power element of each of said inverter and said voltage converter is mounted, said case is configured to integrally house said damper, said rotating electrical machine and said power transmission mechanism, said reactor and said circuit element substrate are disposed in said case such that, when projected in a direction of a rotation shaft, said reactor and said circuit element substrate fall within a vertical dimension of a projected portion of said case, when mounted on the vehicle, that houses said damper, said rotating electrical machine and said power transmission mechanism, and said reactor including a core disposed to transmit and receive heat to and from said case, and a coil wound around said core.