Single-stage high-power-factor electronic ballast with a symmetrical class-DE resonant rectifier
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Publication Details
Author list: Ekkaravarodome C., Jirasereeamornkul K.
Publisher: Springer
Publication year: 2012
Journal: Journal of power electronics (1598-2092)
Volume number: 12
Issue number: 3
Start page: 429
End page: 438
Number of pages: 10
ISSN: 1598-2092
eISSN: 2093-4718
Languages: English-Great Britain (EN-GB)
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Abstract
This paper presents the use of a novel, single-stage high-power-factor electronic ballast with a symmetrical class-DE low-dυ/dt resonant rectifier as a power-factor corrector for fluorescent lamps. The power-factor correction is achieved by using a bridge rectifier to utilize the function of a symmetrical class-DE resonant rectifier. By employing this topology, the peak and ripple values of the input current are reduced, allowing for a reduced filter inductor volume of the EMI filter. Since the conduction angle of the bridge rectifier diode current was increased, a low-line current harmonic and a power factor near unity can be obtained. A prototype ballast, operating at an 84-kHz fixed frequency and a 220-V rms, 50-Hz line input voltage, was utilized to drive a T8-36W fluorescent lamp. Experimental results are presented which verify the theoretical analysis.
Keywords
Power-factor correction, Single-stage
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