Control strategy for an electric machine in a vehicle

摘要

A hybrid-electric vehicle method of controlling a hybrid electric vehicle is provided. The vehicle includes a traction battery, at least two electric-machines, and a controller. The controller is configured to, in response to a faulted condition one of the electric-machines during a drive cycle, command the other of the electric-machines to function in a mode in which torque output is restricted to a threshold value that depends on a voltage of the battery to maintain vehicle propulsion during the drive cycle.

主权项

1. A vehicle comprising:
at least two electric-machines; at least one variable-voltage converter (VVC) operatively arranged with at least one electric-machine; at least one controller configured to, in response to a faulted condition on one of the electric-machines:
disabling the other electric-machine temporarily;setting the VVC to a bypass mode to dissipate high-voltage power; and after a threshold time, re-enabling the VVC and the other electric-machine to a torque-limiting mode to maintain vehicle propulsion during the drive cycle.