Harmonic elimination in a single phase inverter output voltage with 2 and 4 bipolar notches in a half cycle by the HGA

Inverters are power devices used for many industrial applications such as power conversion, the speed control of induction motors etc. When a magnetic device is energized by an inverter power supply, its magnetic core is subjected to additional core losses due to harmonic contents. One solution to this problem may be the selective harmonic elimination based on the simultaneous solution of non-linear equations that are mainly function of the switching angles. In this paper, the hybrid genetic algorithms method was used to eliminate the dominant harmonics leading to additional losses in a strip wound toroidal core used to build a low power transformer. The results indicated that the proposed method works well and it achieves to reduce the total harmonic distortion at the primary current and the induced voltage of the transformer under both ohmic and inductive loads.