Sensor less field oriented control of an induction motor using an instantaneous slip frequency estimation method

Author

Nakano, Hirotami ; Takahashi, Isao

Author_Institution

Technol. Univ. of Nagaoka, Japan

fYear

1988

fDate

11-14 April 1988

Firstpage

847

Abstract

A speed-sensor-less torque-control scheme for an induction motor using a current-source inverter is proposed. The method is based on field-oriented control; the instantaneous slip frequency is estimated from terminal voltages and currents of the motor. An improved instantaneous-slip-frequency estimation method and a rotor-speed estimation method are described. The incremental system transfer function around operating points is used to determine the optimum values of the estimator gains and the torque controller gains, which are needed in the analysis. Experimental and simulation results that confirm the validity of the approach are given.<>

Keywords

induction motors; slip (asynchronous machines); torque control; velocity control; current-source inverter; field-oriented control; incremental system transfer function; induction motor; instantaneous slip frequency estimation method; rotor-speed estimation method; speed-sensor-less torque-control scheme; Control systems; Frequency estimation; Induction motors; Mechanical sensors; Phase estimation; Pi control; Proportional control; Sensor phenomena and characterization; Sensor systems; Torque control;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 1988. PESC '88 Record., 19th Annual IEEE

Conference_Location

Kyoto, Japan

Type

conf

DOI

10.1109/PESC.1988.18216

Filename

18216