Abstract
ABSTRACTThe topology of the energy-saving single-phase full-bridge resonant-pole soft-switching inverter is proposed to improve the power conversion efficiency of the single-phase full-bridge inverter. The auxiliary circuit is connected with the bridge arm of the inverter and contains only one auxiliary switch and a few passive devices, which is conducive to reducing the hardware cost of the auxiliary circuit and simplifying the control of the auxiliary circuit, so as to improve the reliability and practicability of the inverter. During the operating process of the inverter, the main switch and the auxiliary switch can achieve soft-switching by using the auxiliary circuit, and the energy-saving operation of the inverter can be realised by reducing the switching loss. In this paper, the operating process of the circuit and the realisation condition of the soft-switching are analysed. The experimental results on a single-phase prototype with the rated power of 3 kW show that the switching device can achieve soft-switching, and the efficiency of the prototype at the rated power reaches 98.6%, which lays a theoretical and technical foundation for the further research and development of a new practical high-performance single-phase full-bridge soft-switching inverter.
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