Title :
A Simple Multiple Pulsewidth Modulated AC Chopper
Author :
Bhat, S.Ashoka Krishna ; Vithayathil, Joseph
Author_Institution :
Graduate student, Department of Electrical Engineering, University of Toronto, Toronto Canada M5S 1A4.
Abstract :
A simple multiple pulsewidth modulated (MPWM) ac chopper using power transistors for 3-¿ power control is discussed. 120° chopping period is used for main transistors so that the circuit can accommodate resistive and lagging or leading power factor loads. Only 1-¿ sensing is used for 3-¿ control. An alternate economical power and control schemes for 3-¿ MPWM ac choppers suitable only for resistive loads is also suggested. The experimental results for 12 choppings per cycle are given.
Keywords :
Choppers; Counting circuits; Open loop systems; Phase locked loops; Power transistors; Pulse modulation; Reactive power; Space vector pulse width modulation; Voltage control; Voltage-controlled oscillators;
Journal_Title :
Industrial Electronics, IEEE Transactions on
DOI :
10.1109/TIE.1982.356661
