A Novel Magnetic Reset Zero-voltage Soft-switching Inverter with Improved Magnetic Coupling Method

This paper will present an improved Coupled-Magnetic method for Reset Zero-voltage switching inverter. The improved inverter topology can fully use leakage inductance of coupled inductor, simplify the coupled inductor design, and improve the inductor coupled efficiency and inverter efficiency. Besides, this improved soft-switching inverter also inherit same merits, which are: The main device is Power MOSFETs, which have low conduction loss and can achieve zero-voltage switching; the auxiliary devices are low current and low cost IGBTs and Diodes, which could achieve zero-current switching. Working procedure was detailed to present the working principle. Resonant circuit was analyzed to present the advantage of proposed method. Resonant circuit timing was also analyzed for resonant components design and selection. At last, experiment results of a 5kW single phase inverter was presented to demonstrate the merit of proposed method.