A novel estimation of phase currents from DC link for permanent magnet AC motors

Author

Ying, L. ; Ertugrul, N.

Author_Institution

Dept. of Electr. & Electron. Eng., Adelaide Univ., SA, Australia

Volume

2

fYear

2001

fDate

2001

Firstpage

606

Abstract

This paper proposes a novel three-phase current reconstruction technique that utilises the measured DC link current and the switching signals of the inverter. The method is based on an adaptive current observer, which uses the computer model of the motor drive to determine all possible inverter conditions that are not measurable and reconstructs the phase currents accurately. A wide range of experimental results provided in this study demonstrates that the, method can accurately reconstruct the line currents of both trapezoidal and sinusoidal permanent magnet (PM) AC motors. The effects of parameter variations are also discussed

Keywords

AC motors; DC-AC power convertors; adaptive control; control system analysis; invertors; machine control; machine theory; observers; parameter estimation; permanent magnet motors; switching circuits; DC link phase currents estimation; adaptive current observer; computer model; invertor switching signals; parameter variations; permanent magnet AC motors; three-phase current reconstruction technique; AC motors; Commutation; Current control; Current measurement; Motor drives; Permanent magnet motors; Phase estimation; Phase measurement; Pulse width modulation; Pulse width modulation inverters;

fLanguage

English

Publisher

ieee

Conference_Titel

TENCON 2001. Proceedings of IEEE Region 10 International Conference on Electrical and Electronic Technology

Print_ISBN

0-7803-7101-1

Type

conf

DOI

10.1109/TENCON.2001.949666

Filename

949666