Patent ID: 8310084

Claim:
A control device for controlling a power shunt circuit of a hybrid vehicle, the control device comprising: first and second inverters comprising DC sides connected to a DC-voltage storage unit, and AC sides configured to be connected to first and second polyphase electric machines, and to be coupled to a mechanical drive of the vehicle, the first polyphase electric machine being capable of operating as a generator or a motor and the second polyphase electric machine being capable of operating as a motor for shunting of power from the drive or a generator, the inverters further comprising chopping switches for conversion between the DC sides and the AC sides; a capacitor that filters harmonics on the DC sides of the inverters; and a control unit that controls the chopping switches, comprising at least one mode for controlling the chopping switches by pulse-width modulation of a carrier having an identical frequency for the inverters, wherein the first and second machines are capable of operating as a motor/motor or as a generator/generator, wherein the control unit comprises means for detecting the operation of the first and second machines as the motor/motor or as the generator/generator and first means for controlling the chopping switches of the second inverter in a time-shifted manner relative to the chopping switches of the first inverter in an event of detection of the operation of the first and second machines as the motor/motor or as the generator/generator, and wherein the control unit further comprises means for controlling the chopping switches according to a first mode for controlling the chopping switches by pulse-width scalar modulation, a second mode for controlling the chopping switches by pulse-width vectorial modulation, a third mode for controlling the chopping switches by overmodulated pulse-width modulation, and a fourth, full wave, mode for controlling the chopping switches.