A new configuration of single-phase symmetrical PWM AC chopper voltage controller. - Nabil A. Ahmed; Kenji Amei; Masaaki Sakui (IEEE Trans. Ind. Electron., 1999)

Analytical Study on a New Induction Type Magnetic Levitation System Creating Quasi-Static Lorentz Forces for a Non-Magnetic Sheet Metal. - Takahisa Ohji; Masaaki Sato; Kenji Amei; Masaaki Sakui (DELTA, 2006)