The effect of harmonic phase angle on the operation performance of a three-phase induction motor

This paper uses a real load test to investigate the effect of various harmonic orders and phase angles on the operation performance of a three-phase induction motor. In the test, the voltage harmonic orders from 2 to 7 with the voltage distortion factors (VDF) 15% and 20%, respectively, were chosen, and according to different phase angle, each harmonic order was designed into 8 kinds of waveforms for which phase angles are 0°, 45°, 90°, 135°, 180°, 225°, 270° and 315°. The experimental data includes input current, efficiency and temperature rise. From the test result, it can be found that the operation performance of a three-phase induction motor varies by not only harmonic order and VDF but also phase angle of each individual harmonic order