A new field-oriented control strategy for induction motor is proposed in the paper. It is called Maximum Torque Per Watt (MTPW) and allows obtaining the minimum value of the sum of the stator and rotor losses due to joule effect, and of the iron losses, for a given value of the reference torque and of the motor speed. Iron losses have been modeled according to Steinmetz equation, separating hysteresis and eddy currents and taking into account the dependence both on the frequency and on the peak value of the flux density. Numerical and experimental results are presented to confirm the validity of the proposed approach, which allows achieving significant improvements in the efficiency of induction motor drive.

提出了一种新型的感应电动机磁场定向控制策略。它被称为每瓦最大转矩（MTPW），对于给定的参考转矩和电动机速度值，它允许获得由焦耳效应引起的定子和转子损耗之和以及铁损的最小值。已经根据Steinmetz方程对铁损进行了建模，将磁滞和涡流分开，并考虑了对频率和磁通密度峰值的依赖性。数值和实验结果表明了该方法的有效性，该方法可以实现感应电动机驱动效率的显着提高。