A method for field-oriented control of an induction motor

摘要

A method for the field-oriented control of an induction motor (2) by means of a frequency converter (1) is disclosed, in which method a transformation angle ( delta ) is determined by estimation and is corrected in dependence on a rotational speed ( omega mR) of a rotor flux vector (imR) or of the induction motor (2) and/or in dependence on a delay time (Tdel). In this connection it is desirable to improve the control behaviour. To that end, the transformation angle ( delta ) is corrected a second time to compensate for a phase shift in the frequency converter (1).