A unity power factor PWM rectifier with DC ripple compensation. - Toshihisa Shimizu; Tsutomu Fujita; Gunji Kimura; Jun Hirose (IEEE Trans. Ind. Electron., 1997)

Auxiliary resonant commutated pole inverter using two internal voltage-points of DC source. - Akio Toba; Toshihisa Shimizu; Gunji Kimura; Mitsuo Shioya; Shigeru Sano (IEEE Trans. Ind. Electron., 1998)