Novel rotor position extraction based on carrier frequency component method (CFCM) using two reference frames for IPM drives. - Mengesha Mamo; Kozo Ide; Mitsujiro Sawamura; Jun Oyama (IEEE Trans. Ind. Electron., 2005)

A hybrid speed estimator of flux observer for induction motor drives. - Kozo Ide; Jung-Ik Ha; Mitsujiro Sawamura (IEEE Trans. Ind. Electron., 2006)