Title :
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
fDate :
1/1/1990 12:00:00 AM
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;
Journal_Title :
Power Electronics, IEEE Transactions on
