Journal ArticleDOI
A Simple Multiple Pulsewidth Modulated AC Chopper
TLDR
In this article, a simple multiple pulsewidth modulated (MPWM) ac chopper using power transistors for 3-? power control is discussed, and the experimental results for 12 choppings per cycle are given.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.read more
Citations
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Patent
Method and apparatus for electronic power control
TL;DR: In this paper, a method of electronic power control by varying the amplitude of an electrical power supply voltage, independent of frequency, whereby the output frequency will always be the same as the input frequency was described.
Journal ArticleDOI
Simple topologies of PWM AC-AC converters
TL;DR: This letter proposes a new family of simple topologies of PWM AC-AC converters with minimal switches that can reduce cost and improve reliability, and the operating principle and control method of the proposed topologies are presented.
Proceedings ArticleDOI
Power electronic transformers for utility applications
TL;DR: In this paper, the authors explored the possibilities of employing AC-AC switched mode power converters in combination with reactive elements to realize a chopped AC link, thereby decreasing the required magnetic core size for voltage transformation and isolation.
Journal ArticleDOI
A new configuration of single-phase symmetrical PWM AC chopper voltage controller
TL;DR: A symmetrical PWM AC chopper designed to operate with single-phase inductive loads with a reduced number of controlled switches is described and the operation as a variable voltage source of this converter is evaluated.
Proceedings ArticleDOI
Comparative evaluation of PWM AC-AC converters
TL;DR: In this paper, the authors present the design guidelines and the results of a comparative study of power converters for AC power conditioning applications, including buck, boost, buck-boost, and Cuk.
References
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Journal ArticleDOI
Three-Phase AC Power Control Using Power Transistors
Alexander Mozdzer,Bimal K. Bose +1 more
TL;DR: In this article, a three-phase ac power control circuit using power transistors which operate in a high-frequency chopping mode is described, which is capable of handling several kilowatts of power at any lagging load power factor angle and the output voltage can be smoothly controlled from zero to full supply voltage.
Journal ArticleDOI
A.C. voltage regulation by means of chopper circuits
A. Emanuel-Eigeles,J. Appelbaum +1 more
TL;DR: In this article, an ac voltage-regulation method based on the principle of both forced ignition and extinction of thyristors acting as switches was described. This method was found more efficient than the conventional one, assuring a higher power factor for inductive loads.
Journal ArticleDOI
Novel Control Schemes for 3-Phase Zero Voltage Switching
TL;DR: In this paper, the burst and proportional control schemes for 3-? zero voltage switching (ZVS) using off-the-shelf integrated circuits (IC's) are described.