Blocked phase current patching three-phase rectifier for double feed AC-AC converter

Based on the inherent property of three phase AC power supply, the present scheme of the three phase rectifier utilizes auxiliary blocked phase selection and boost-buck circuits by processing only 22% amount of the power to patch the gaps of the input current waveforms of the main rectifier. That only one current loop of the three-phase inputs is regulated and one is left as low resistance state makes the system very stable, even in the situations of three-phase unbalance and load fluctuation. While the harmonics are diminished, no common mode voltage output and the energy double fed are achieved.