When the switching frequency of the three-phase inverter used as an important link in the medium and small power generation system increases

switching loss will also increase significantly

which is not favourable to save energy.In order to realize high frequency and energy-saving of medium and small power three-phase inverter

a topology of three-phase zero-voltage switching resonant pole inverter is proposed.When the auxiliary resonant circuit on the bridge arm is in a working state

the voltage across the capacitors parallel with the main switches and the auxiliary switches can periodically change to zero

so that the switching devices can achieve zero-voltage soft-switching

which is beneficial to the metal oxide semiconductor field effect transistor (MOSFET) used as the switching device of the inverter.The working flow of the circuit is analyzed.The experimental results show that the switching devices achieve zero-voltage soft-switching.Therefore

this topology structure has certain reference value for the research and development of the small and medium power three-phase inverter with high-performance.