Improvement of input power factor in AC choppers using asymmetrical PWM technique

An asymmetrical pulse width modulated (APWM) control technique for AC choppers is proposed to improve the input power factor. The switching function for the proposed technique is derived and hence converted into the asymmetrical PWM waveform for practical implementation of an AC chopper. Through dig...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 1995-04, Vol.42 (2), p.179-185
Main Authors: Jang, Do-Hyun, Choe, Gyu-Ha
Format: Article
Language:English
Subjects:
Applied sciences
Choppers
Circuits
Digital simulation
Electrical engineering. Electrical power engineering
Exact sciences and technology
Lighting control
Power electronics, power supplies
Power system harmonics
Pulse width modulation
Reactive power
Regulators
Space vector pulse width modulation
Voltage
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:An asymmetrical pulse width modulated (APWM) control technique for AC choppers is proposed to improve the input power factor. The switching function for the proposed technique is derived and hence converted into the asymmetrical PWM waveform for practical implementation of an AC chopper. Through digital simulation several characteristics are investigated theoretically and then compared with those of the conventional PWM control technique. The proposed strategy is simplified to an approximate APWM which can be realized by the analog circuit. Practical verification of the theoretical predictions is presented to confirm the capabilities of the proposed technique.< >
ISSN:0278-0046
1557-9948
DOI:10.1109/41.370384