A smart PWM switched power filter for single phase nonlinear loads

Author

Sharaf, A.M. ; Guo, Caixia ; Huang, Hong

Author_Institution

Dept. of Electr. & Comput. Eng., New Brunswick Univ., Fredericton, NB, Canada

Volume

2

fYear

2000

fDate

2000

Firstpage

932

Abstract

The paper presents a novel single smart filter and energy miser for single phase motorized and inrush type cyclical loads such as air-conditioning blowers, refrigerator and water-pumping applications. The smart filter is a tuned-arm single-phase filter equipped with a pulse width modulation (PWM) triggering circuit and a novel dynamic RMS current tracking controller. The smart filter/energy miser ensures supply power quality enhancement, less source current/load voltage waveform modulation as well as enhanced electric energy efficiency for cyclical, inrush type nonlinear motorized loads. The PWM switching scheme establishes a dynamic on-line varying duty cycle ratio α that modulates the apparent smart filter impedance to provide an effective compensating filter current level to cope with load current waveform distortion

Keywords

PWM power convertors; electric current control; electric impedance; energy conservation; load (electric); power filters; power supply quality; pulse width modulation; switching circuits; trigger circuits; PWM triggering circuit; air-conditioning blowers; compensating filter current level; dynamic RMS current tracking controller; dynamic on-line varying duty cycle ratio; energy miser; enhanced electric energy efficiency; inrush type cyclical loads; load current waveform distortion; load voltage waveform modulation; pulse width modulation triggering circuit; refrigerator; single phase motorized loads; single phase nonlinear loads; smart PWM switched power filter; smart filter; smart filter impedance modulation; source current waveform modulation; supply power quality enhancement; tuned-arm single-phase filter; water-pumping; Power filters; Power quality; Power supplies; Pulse circuits; Pulse width modulation; Refrigeration; Space vector pulse width modulation; Surges; Tuned circuits; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Computer Engineering, 2000 Canadian Conference on

Conference_Location

Halifax, NS

ISSN

0840-7789

Print_ISBN

0-7803-5957-7

Type

conf

DOI

10.1109/CCECE.2000.849602

Filename

849602