Simulating and control of a field-oriented magnetization current of a rotor of an asynchronous machine

摘要

A method for simulating a field-oriented magnetization current (i_mg,_φ#) a rotor of an asynchronous machine (12) by means of a model, in particular of a machine model, is described. The asynchronous machine (12) of rotation of the transmitter is free, field-oriented and operated by means of a stepped voltage, the method comprises determining a simulated field-oriented in a stator of the asynchronous machine (12) induced stator voltage (u_{ind, φ#}), Determining a simulated stator circle frequency (ω_s,#), with which a field oriented coordinate system relative to a stator oriented coordinate system rotates and simulation of the field-oriented magnetization current (i_mg,_φ#) of the rotor on the basis of the determined simulated field-oriented in the stator induced stator voltage (u_{ind, φ#}) and the specific simulated stator circle frequency (ω_s,#) on. The simulation of the field-oriented magnetization current (i_mg,_φ#) therefore can, in a particularly simple, efficient and accurate manner and operation, in particular, independent of temperature fluctuations of the rotor and / or a be operationally iron saturation of the rotor.