A topology of novel single-phase full-bridge passive soft-switching inverter is proposed to improve conversion efficiency of the single-phase full-bridge inverter. During the commutation process of each switching cycle

the low-loss auxiliary resonant circuit of the inverter is used to save energy. There are some passive devices such as inductor

capacitor and diode

which cannot complicate the control strategy of the inverter. In addition

freewheeling of load current can be realized via the auxiliary circuit and the distortion ratio of output current waveforms of the inverter is reduced when the inverter is in the dead state. The operation process of the circuit is analyzed. The experiment is carried out on a 3kW one-phase laboratory prototype. Experimental results verify that the switching devices of the inverter can achieve soft-switching and the distortion ratio of output current waveform of the inverter is improved. Therefore

the topology has an important reference value for the research and development of high performance single-phase full-bridge inverter.