DocumentCode :
797814
Title :
A Static Variable-Frequency Three-Phase Source Using the Cycloconverter Principle for the Speed Control of an Induction Motor
Author :
Datta, Samir K.
Author_Institution :
Department of Electrical Engineering, California State Polytechnic College, San Luis Obispo, Calif. 93401.
Issue :
5
fYear :
1972
Firstpage :
520
Lastpage :
530
Abstract :
This paper describes a variable-frequency source employing the cycloconverter principle. SCR´s have been used as the principal switching and voltage-regulating devices. The logic of the firing circuit has been discussed. The factor affecting output frequency stability has also been presented. A three-phase variable low-frequency oscillator has been used as the reference to achieve the variation of frequency. Voltage variation has been affected by phase delaying of the firing pulses in a manner similar to that in a phase-controlled rectifier. Provision has been made for changing the phase sequence at the output in order to facilitate reversal of the direction of rotation of the motor. Experimental results include output waveforms of various frequencies (0-30 Hz), and speed variations of the experimental motor (1 hp, 100 V, 1700 r/min) in either direction of rotation thereby providing the practical feasibility of the SCR cycloconverter for speed control of induction motors.
Keywords :
Circuit stability; Delay; Frequency; Induction motors; Logic circuits; Logic devices; Oscillators; Rectifiers; Velocity control; Voltage;
fLanguage :
English
Journal_Title :
Industry Applications, IEEE Transactions on
Publisher :
ieee
ISSN :
0093-9994
Type :
jour
DOI :
10.1109/TIA.1972.349776
Filename :
4158288
Link To Document :
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