Current sensorless field-oriented control of induction motors

Author

Chang, S.-C. ; Yeh, S.-N.

Author_Institution

Nat. Taiwan Inst. of Technol., Taipei, Taiwan

Volume

143

Issue

6

fYear

1996

fDate

11/1/1996 12:00:00 AM

Firstpage

492

Lastpage

500

Abstract

A new method for controlling a current sensorless induction motor is presented. It uses a partial state estimator to estimate the torque-current and a voltage predictor to predict the voltage vector of a voltage source inverter (VSI). In the system, a speed controller, a torque-current estimator, a voltage-predictive voltage-source inverter (VPVSI) and a slip calculator are included. Fast response and adaptive field weakening above the base speed of the induction motor are achieved through a direct software control system based on field orientation with recursive operation between partial state estimation and voltage prediction. Besides low cost, the simplicity of the system hardware yields high reliability and good maintainability

Keywords

induction motor drives; invertors; machine control; power engineering computing; slip (asynchronous machines); state estimation; velocity control; adaptive field weakening; current sensorless field-oriented control; direct software control system; fast response; good maintainability; high reliability; induction motors; partial state estimator; recursive operation; slip calculator; speed controller; system hardware; torque-current estimation; voltage prediction; voltage predictor; voltage source inverter; voltage vector prediction;

fLanguage

English

Journal_Title

Electric Power Applications, IEE Proceedings -

Publisher

iet

ISSN

1350-2352

Type

jour

DOI

10.1049/ip-epa:19960527

Filename

553467