A high accuracy current component detection method for fully digital, vector-controlled PWM VSI-fed AC drives

Author

Matsui, Takayuki ; Okuyama, Toshiaki ; Takahashi, Jun´ichi ; Sukegawa, Takashi ; Kamiyama, Kenzo

Author_Institution

Hitachi Ltd., Ibaraki, Japan

fYear

1988

fDate

11-14 April 1988

Firstpage

877

Abstract

A high-accuracy differential-type current component detection method and test results are described. The method is suited for vector-controlled pulse width-modulated (PWM) VSI-fed adjustable-speed AC drives. Its features include elimination of high-frequency current harmonics and correction of the detection error caused by the lag time of time-sharing processing. Since this method allows current-loop calculations at a slower sampling rate with a conventional microprocessor, it realizes a fully digital speed regulator with a minor current component loop. Simulation results and experimental results are presented.<>

Keywords

AC motors; electric drives; invertors; pulse width modulation; variable speed gear; velocity control; PWM VSI-fed AC drives; adjustable-speed AC drives; current component detection method; current-loop calculations; fully digital speed regulator; pulse width modulation; simulation results; test results; vector control; voltage source invertor; AC motors; Application software; Employment; Frequency; Machine vector control; Microprocessors; Pulse width modulation; Sampling methods; Testing; Time sharing computer systems;

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.1988.18220

Filename

18220