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

Author

Matsui, Takayuki ; Okuyama, Toshiaki ; Takahashi, Junichi ; Sukegawa, Takashi ; Kamiyama, Kenzo

Author_Institution

Hitachi Ltd., Ibaraki, Japan

Volume

5

Issue

1

fYear

1990

fDate

1/1/1990 12:00:00 AM

Firstpage

62

Lastpage

68

Abstract

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

Keywords

digital control; invertors; pulse width modulation; variable speed drives; PWM VSI-fed AC drives; adjustable-speed AC drives; current loop calculations; differential-type current component detection; digital speed regulator; digital vector-controlled; time-sharing processing; voltage source inverter; AC motors; Application software; Employment; Frequency; Machine vector control; Microprocessors; Pulse width modulation; Pulse width modulation inverters; Testing; Voltage;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/63.46000

Filename

46000