A circuit topology family of inverters with high frequency pulse AC link and a double polarities phase-shifting control strategy are proposed and deeply investigated.

For multiple back-to-back four-quadrant converter, a modified SPWM technique is combined with carrier phase-shifting control, which reduces current harmonic and enhances power exchange ability.

The steady principle of the inverter with a high frequency pulse AC link and the unipolarity phase shifting control strategy are investigated.