A vehicle powertrain has a traction battery, an electric machine, a power converter including a pair of series connected switches defining a phase leg for the electric machine, and a controller. The controller drives the switches with respective pulse width modulated signals to transfer power from the traction battery to the electric machine. Each of the respective pulse width modulated signals defines a low state and a high state. The controller further, responsive to a current flowing through one of the switches exceeding a predetermined threshold and the pulse width modulated signal for the other of the switches having the high state, stops driving the switches.
POWER CONVERTER FAULT DETECTION
2021-01-14
Patent
Electronic Resource
English
IPC: | H03K PULSE TECHNIQUE , Impulstechnik / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern |
European Patent Office | 2023
|