An energy-saving three-phase resonant DC (Dired Current) link soft-switching inverter is proposed to improve efficiency of the inverter. The auxiliary circuit is added on the DC link of the inverter. When the main switches need be operated

auxiliary circuit enters into the resonance state in advance. The voltage across DC link changes to zero so that the main switches can achieve zero-voltage soft switching. Besides

the auxiliary switch can also achieve soft switching. By controlling the interval time of the operation of the auxiliary switches

the zero-state duration of the DC link voltage can be adjusted so that various flexible pulse width modulation strategies can be applied in the inverter. The workflow of the inverter is analyzed. The experimental results show that the main switch and the auxiliary switch can achieve soft switching. Therefore

the topology is of reference for the development of high-performance resonant DC link inverters.