A Novel Single-Phase Soft-Switching AC Chopper Without Auxiliary Switches

Author

Wang, Chien-Ming ; Lin, Chang-Hua ; Su, Ching-Hung ; Chang, Shih-Yuan

Author_Institution

Dept. of Electr. Eng., Nat. Ilan Univ., I-Lan, Taiwan

Volume

26

Issue

7

fYear

2011

fDate

7/1/2011 12:00:00 AM

Firstpage

2041

Lastpage

2048

Abstract

A single-phase soft-switched series-resonant ac chopper without auxiliary switches is presented. The presented single-phase ac chopper is configured by a series-resonant conversion without cycloconversion and auxiliary switches. The presented single-phase ac chopper is a series resonator with four main switches to configure adaptively the resonant voltage robes. The output sinusoidal voltage is synthesized by a series of sinusoidal amplitude quasi-sinusoidal pulses following the input voltage amplitude. The presented single-phase ac chopper is operated by frequency modulation with a constant-on time control. Waveform syntheses for the output sinusoidal voltage are clearly derived. A typical design example of a 600 W single-phase soft-switching ac chopper is examined to assess the system performance. The power efficiency is over 92% when the output power is at maximum output rated power. The total harmonic distortion when the output power is at maximum output rated power is 0.949%.

Keywords

choppers (circuits); harmonic distortion; resonant power convertors; switching convertors; auxiliary switches; constant-on time control; cycloconversion; efficiency 92 percent; frequency modulation; power 600 W; resonant voltage robes; series resonator; series-resonant conversion; single-phase soft-switched series-resonant AC chopper; sinusoidal amplitude quasisinusoidal pulses; sinusoidal voltage; total harmonic distortion; waveform synthesis; Choppers; Equivalent circuits; Frequency modulation; Switches; Video recording; Voltage control; Zero current switching; ac chopper; resonant converter;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/TPEL.2010.2102049

Filename

5674090