Identification of the saturated mutual inductance of an asynchronous motor at standstill by recursive least squares algorithm

A method is proposed which estimates the nonlinear function of the mutual inductance of an asynchronous motor. With the obtained function it is possible to calculate the control parameters, e.g. for field oriented control. An important advantage of this method is that the identification of the mutual inductance can be taken automatically at standstill without locking the rotor mechanically. Therefore, the proposed method can be used for self commissioning of an induction motor drive. Simulation results are verified by a practical test using a squirrel cage motor