In order to realize the energy-saving operation of three-phase inverter

a novel three-phase resonant DC(Direct Current) link inverter with soft-switching function is proposed. The auxiliary resonant circuit on the DC side can participate in the commutation process

making the DC link voltage change to zero before the main switches act on the bridge arm. Therefore

the main switches can achieve the zero-voltage soft-switching action

and realize the energy-saving operation of the inverter by reducing the switching loss. The workflows of the circuit are analyzed. The experimental results show that the switching devices are in the state of soft switching. The structure of the auxiliary resonant circuit has reference value for research and development of an energy-saving three-phase inverter.