Patent ID: 9685902
Date: 2017-06-20
CPC Classifications: B60L,H02P,Y02T

Claim:
1. A control system for controlling a supply of power to an electric machine of a motor vehicle and which contributes to propulsion of the vehicle, the control system being connected at an input to first processing circuitry configured to estimate a temperature of a rotor of the electric machine and to a temperature sensor that measures a temperature of a stator of the electric machine, the control system comprising: a first currents map that is optimized for limiting electrical losses; a second currents map that is optimized for reducing losses in the rotor and increasing losses in the stator; and a third currents map that is optimized for increasing losses in the rotor and decreasing losses in the stator, wherein the first, second and third maps contain a set of values allowing determination of electric machine supply currents on the basis of torque and rotational speed request values received at the input to the control system; and second processing circuitry configured to select one of the first, second and third maps on the basis of signals from the first processing circuitry estimating the temperature of the rotor and from the stator temperature sensor, and transmit supply current signals resulting from the selected one of the first, second and third maps to the electric machine.