Torque control or regulation for electric motor e.g. for vehicle steer-by-wire system, involves estimating motor magnetic flux using phase currents and voltages, and controlling or regulating torque depending on estimated flux

摘要

The method involves estimating the magnetic flux of the electric motor (13) using the phase currents (i1-i3)and the phase voltages (u1-u3) applied to the motor and controlling or regulating the torque depending on the estimated magnetic flux (Psis). A control parameter for a torque controller is determined using the estimated magnetic flux. Independent claims are also included for the following: an arrangement for electric motor torque control or regulation, a controller for a steer-by-wire system, a memory element for a controller and a computer program for implementing the method.