PWM_SPEED_CONTROL

Published:2009/7/6 23:53:00 Author:May | From:SeekIC

Power stage using Motorola 4N26 optoisolators and push-pull transistors drives fractional -horsepower single-phase AC motor over speed range of 5% to 100% of base speed. Input drives are provided by pulse-width modulation inverter using stored program in ROM to generate sine-weighted pulse trains to provide variable-frequency drive.-T. Mazur, ”ROM-Digital Approach to PWM-Type Speed Control of AC Motors,”Motorola, Phoenix, AZ, 1974, AN-733, p12.



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