Loss minimisation control of induction motor drive for electrical vehicle

In this paper, a simple mathematical model of induction motors in the field-oriented frame, including power losses, is presented. The parameter identification and influence of supply and load conditions on the induction motor parameters are discussed. Changes of motor parameters are expressed as polynomial functions of stator angular frequency, slip angular frequency and temperature of motor windings. Sensitivity of control systems with regard to the changes of motor parameters was decreased by applying open-loop adaptive control. Based on this model, a loss minimisation control algorithm is proposed. Experimental investigations were carried out on a laboratory model of an inverter-fed induction motor drive.