In order to realize the energy-saving operation of medium and small power three-phase inverters at high switching frequency

a novel three-phase resonant DC link inverter topology is proposed for the first time.When the auxiliary circuit on the DC link of the inverter participates in the working process

the DC link voltage across the input end of the bridge arm can periodically form a zero voltage state

and the main switch and the auxiliary switch can achieve the zero-voltage soft-switching.When the high frequency metal oxide semiconductor field effect transistor is used as the switching device of the inverter

the zero-voltage soft switching can eliminate the capacitive turn-on loss of the MOSFET(Metal Oxide Semiconductor Field Effect Transistor)

which is beneficial to optimizing the efficiency of the inverter.In this paper

the workflows of the circuit are analyzed.The experimental results on the 2.5kW prototype show that the switching devices are all at zero voltage soft-switching.Therefore

this topology has reference value for the development of high performance medium and small power three-phase inverters.