Method for current sensor-less engine control of e.g. asynchronous machine for electrical power steering apparatus for motor car, involves considering temperature of corresponding output stage branches during calculation of signals

摘要

The method involves considering a temperature behavior of an output stage (707). A temperature of corresponding output stage branches is considered during calculation of PWM signals (704) for controlling the individual output stage branches. The PWM signals corresponding to reference-voltages (701, 702) of the branches are corrected based on the temperature by allocation of PWM correction corresponding to a voltage drop at an inner resistance i.e. equivalent loss resistance, of the corresponding output stage branches based on an instantaneous phase current of the corresponding branches.