Patent ID: 9649953
Date: 2017-05-16
CPC Classifications: B60L,H02P,Y02T

Claim:
1. A method for operating an electrical machine for making available drive power for a drive train of a motor vehicle, the electrical machine being controlled by several phase currents, the method comprising: sensing a first electrical variable that represents torque delivered by the electrical machine; sensing a second electrical variable that represents a DC voltage power supplied to an inverter to generate the phase currents; monitoring the torque by comparing the first sensed electrical variable to a maximum threshold torque value, wherein a degradation of the electrical machine is taken into consideration in the monitoring of the torque; further monitoring the torque by performing a plausibility check based on the first sensed electrical variable and the second sensed electrical variable; generating a current, wherein the degradation of the electrical machine is taken into consideration and; controlling the electrical machine with the current to compensate for the degradation of the electrical machine.