Patent ID: 7151355

Claim:
A control system for an electric driving system, used in an electric driving system for a vehicle, wherein said electric driving system for a vehicle comprises: an in-vehicle power supply for supplying DC electrical power; an inverter for converting said DC electrical power output from said in-vehicle power supply, into AC electrical power; and an AC electric motor, which is driven by the AC electrical power output from said inverter, for generating electrical driving force for driving a component to be driven, wherein said control system for an electric driving system provides control means for controlling driving of said AC electric motor by controlling said inverter according to an instructed torque for said AC electric motor, and wherein, in a case that the output of said AC electric motor becomes negative, and excess electrical energy is generated, said control means controls the current applied to said AC electric motor such that the loss in said AC electric motor exceeds the negative output of said AC electric motor.