TEMPERATURE BASED ELECTRIC MACHINE CONTROL

摘要

A vehicle having at least two electric machines includes an oil circulation path that circulates oil through the electric machines. A controller commands the electric machines to fulfill torque demands. The controller utilizes the oil temperature in the oil circulation path to control the commanded torque output by the electric machines. In the event of a failure or fault in an oil temperature sensor, the controller estimates the oil temperature from the temperature of coils within at least one of the electric machines. The estimated oil temperature is utilized instead of the sensed oil temperature to control the torque outputs to satisfy torque demands.

主权项

1. A vehicle comprising:
a first electric machine (EM) having first coils; a second EM having second coils; first and second sensors configured to determine temperatures of the first and second coils, respectively; and a controller programmed to
alter torque output by the first EM based on the temperature of the first coils, andin response to a fault in the first sensor, alter the torque output based on the temperature of the second coils.