DocumentCode :
1201893
Title :
A Microprocessor-Based Current Controller with an Internal Current-Rate Loop for Motor Drives
Author :
Ohmae, Tsutomu ; Matsuda, Toshihiko ; Masaki, Ryoso ; Saito, Keiji
Author_Institution :
Hitachi Limited, Research Laboratory, 1-1 Saiwai-cho 3 Chome, Hitachi-shi, Ibaraki-ken, 317 Japan.
Issue :
5
fYear :
1986
Firstpage :
805
Lastpage :
811
Abstract :
A new current-control method that is suitable for microprocessor-based speed regulation of motor drives is described. The method achieves fast-response and high-accuracy performance by using a major current loop and an internal current rate loop. The former loop is used to control precisely the mean value of the motor current by employing a current feedback signal obtained from a smoothing filter of the rippled current. The latter loop is used to stabilize the major loop with a high gain and to limit the variation rate of the motor current by employing the current feedback signal obtained from the instantaneous current without time delay. A current controller using a microprocessor was trail-manufactured and tested with a thyristor-converter-driven dc motor. It was found that fast-controlled current response can be obtained, even with a relatively long sampling period.
Keywords :
DC motors; Delay effects; Electrical equipment industry; Feedback loop; Large scale integration; Microprocessors; Motor drives; Regulators; Sampling methods; Voltage control;
fLanguage :
English
Journal_Title :
Industry Applications, IEEE Transactions on
Publisher :
ieee
ISSN :
0093-9994
Type :
jour
DOI :
10.1109/TIA.1986.4504797
Filename :
4504797
Link To Document :
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