Patent ID: 8091665
Filing Date: 2012-01-10
Classification: B60K,B60L,B60W,H02P,Y02T

Abstract:
1. A vehicle drive system, comprising: an electric storage; a voltage converting unit performing voltage conversion between positive and negative electrodes of said electric storage and positive and negative power lines; first and second rotating electric machines each including a Y-connected three-phase stator coil; first and second inverter circuits electrically connected to both said positive power line and said negative power line, and respectively controlling currents flowing through stator coils of said first and second rotating electric machines; a connecting unit connecting and disconnecting a neutral point of the stator coil of said first rotating electric machine to and from said electric storage; and a control unit controlling said first and second inverters and said connecting unit; wherein when said first rotating electric machine is not used and said second rotating electric machine is used, said control unit sets said connecting unit to a connected state in parallel with a voltage converting operation of said voltage converting unit, so as to cause said first inverter circuit to perform a voltage converting operation using the stator coil of said first rotating electric machine as a reactor.