Abstract
Convenient inductive wireless power transfer (WPT) transmits the electric power via a magnetic wave in a resonance condition. Generally, not only high frequency square wave (SQW) inverter but also modified sine wave and pure sine wave (PSW) inverters are used in the WPT systems. However, using the SQW inverter for the WPT system could be a simpler method, with lower switching loss, and an inverter with fewer components. This article presents the comparison between using the PSW and the SQW inverters via the same H-bridge inverter kits in an inductive WPT system. The results show that the SQW inverter efficiency was higher than the PSW inverter. Also, the input current, including the output voltage and current of the WPT system of the two inverters were not significantly different. In addition, the inverters losses were lower than the WPT system losses. Moreover, the efficiency of the WPT system using the SQW inverter was not significantly different from the use of the PSW inverter.
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