DC-BUS VOLTAGE REGULATION IN A MOTOR VEHICLE DURING EVENTS WITH THE CONTACTOR OPEN

摘要

This disclosure provides DC bus voltage regulation in a motor vehicle during open contactor events. A vehicle power system includes a battery bus between a traction battery and a voltage converter, a high voltage bus between the voltage converter and an inverter, and a controller. In response to the opening of a contactor between the traction battery and the voltage converter, the controller controls a motor in order to keep a speed of a generator electrically coupled to the inverter within a predefined range, the voltage converter to a measured voltage of the battery bus in the direction a first commanded value based on a first difference between the first commanded value and the measured voltage of the battery bus, and the generator to drive a measured voltage of the high voltage bus toward a second commanded value different from the first commanded value Based on the first difference and a second difference between the second commanded value and the measured voltage of the high voltage bus.