Title :
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
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;
Conference_Titel :
Power Electronics Specialists Conference, 1988. PESC '88 Record., 19th Annual IEEE
Conference_Location :
Kyoto, Japan
DOI :
10.1109/PESC.1988.18220
