(1) T. Hashimoto and S. Sone: “Single-phase PWM Converter using Balanced Two-phase Rectification”, T. IEE Japan IA, Vol. 111-D, No. 3, pp. 215-220 (1991-3) (in Japanese)
(3) Y. Neba: “A Single-phase PWM Current Source Type Converter coupling with AC Chopper”, T. IEE Japan IA, Vol. 117-D, No. 6, pp. 673-679 (1997-6) (in Japanese)