High-efficiency RF suppression circuit for fluorescent lamp inverters using charge pump and partial smoothing capacitors

Fumio Suzuki, Kazuo Okino, Yoshiro Nishimura, Hiroyoshi Yamazaki, Hisao Koizumi, Hiroto Yasuura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A highly efficient RF suppression circuit for flourescent lamp inverters based on charge pump and partial smoothing capacitors is proposed. The circuit consists of a pumping capacitor, a partial smoothing capacitor and a control switch. The pumping capacitor is of comparatively small capacitance and the control switch operates to ensure that the pumping capacitor charging current is proportional to the AC power supply voltage, even across the interval where the AC voltage is near zero. Effective use of current charging reduces the RF harmonic components in the supply current and improves the power factor. The charging voltage of the pumping capacitor (Vcp) and the charging voltage of the partial smoothing capacitor (Vch) together effect inverter driving of the lamp circuit. When the lamp starts, the control switch provides the high voltage, Vcp+Vch. After the lamp has started Vcp and Vch are switched in alternation. During the period in which the partial smoothing capacitor is charging, the time constants of the choke coil at the rectifier circuit input and the partial smoothing circuit are optimized, while use of the charging voltage of the pump capacitor prevents the sudden appearance o a charging current at the input. Test circuits exhibited a power factor of 97.4% (well above the 85% rating), and the third to eleventh harmonics were at about half of the rated values, demonstrating the feasibility of a high-power-factor, low-RF inverter.

Original languageEnglish
Title of host publicationPESC Record - IEEE Annual Power Electronics Specialists Conference
Editors Anon
Pages1733-1738
Number of pages6
DOIs
Publication statusPublished - Jan 1 1998
Externally publishedYes
EventProceedings of the 1998 IEEE 29th Annual Power Electronics Specialists Conference, PESC. Part 2 (of 2) - Fukuoka, Jpn
Duration: May 18 1998May 21 1998

Publication series

NamePESC Record - IEEE Annual Power Electronics Specialists Conference
Volume2
ISSN (Print)0275-9306

Other

OtherProceedings of the 1998 IEEE 29th Annual Power Electronics Specialists Conference, PESC. Part 2 (of 2)
CityFukuoka, Jpn
Period5/18/985/21/98

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'High-efficiency RF suppression circuit for fluorescent lamp inverters using charge pump and partial smoothing capacitors'. Together they form a unique fingerprint.

Cite this