초록 ▼

Method of controlling torque of a multi-phase induction motor (10) includes estimating rotor speed as a rational function of filtered stator current i.sub.s0 and voltage u.sub.0 and first and second order derivatives of the filtered stator current and first order derivative of the filtered stator vo

Method of controlling torque of a multi-phase induction motor (10) includes estimating rotor speed as a rational function of filtered stator current i.sub.s0 and voltage u.sub.0 and first and second order derivatives of the filtered stator current and first order derivative of the filtered stator voltage, estimating rotor flux from said estimated rotor speed, estimating rotor flux angle from said estimated rotor flux, and using the estimated rotor flux angle to control motor torque.

대표청구항 ▼

[ What is claimed is:] [6.] A rotor speed estimator, comprising:(a) a current observer that filters measured stator current signals to provide pseudo current signals thereof,(b) a voltage observer that filters measured stator voltage signals to provide pseudo voltage signals thereof,(c) a rotor spee

[ What is claimed is:] [6.] A rotor speed estimator, comprising:(a) a current observer that filters measured stator current signals to provide pseudo current signals thereof,(b) a voltage observer that filters measured stator voltage signals to provide pseudo voltage signals thereof,(c) a rotor speed observer that estimates rotor speed as a function of the pseudo stator current and voltage signals and first and second order derivatives of the pseudo current signal and first order derivative of the pseudo voltage signal.