A study on core losses of non-oriented electrical steel laminations under sinusoidal, non-sinusoidal and PWM voltage supplies

The paper intends to study the iron losses of non-oriented electrical steel laminations under sinusoidal, non-sinusoidal and PWM voltage supplies. The measurement of core losses of electrical steel laminations in Epstein frame is implemented step by step from 50 Hz to 400 Hz. The accuracy of results is verified by simulated modeling of the Ansoft EM software package. The core losses of non-oriented electrical steel laminations under sinusoidal, non-sinusoidal and PWM voltage excitations are compared in the paper. The analyzed results provide motor manufacturers with the important reference to minimize the core losses of the special motors under harmonic voltage supply.