In the commutation process of auxiliary circuit in the resonant pole soft-switching inverter

the accumulation of remanence can lead to saturation of transformer core. To avoid this case

the article proposes a novel topology of three-phase energy-saving resonant pole inverter with transformer-assisted commutation. Under the effect of diode reverse blocking

the magnetizing current of the transformer is unable to form a steady state circulation so that all the energy in the transformer is transferred to the load. The magnetizing current changes to zero

which realizes demagnetizing and resetting function of transformer finally. In addition

the main switch and auxiliary switch of the inverter can achieve zero-voltage soft-switching and zero-current soft-switching respectively. The article analyzes the commutation process. The experimental results show that the switching devices of the inverter have achieved soft switching and the magnetization current of the transformer can reduce to zero. The topology has a certain reference value for the development of the high-performance resonant pole inverter.