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Analysis and performance of novel and highly efficient electronic ballast operating at unity-power-factor

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Abstract

This paper presents the electronic ballast, in which the coupling inductors are used to inject the current to the dc-bus capacitors, to boost the dc-bus voltage and to filter out the ripples from input line current. The current injection coupling inductor injects its stored energy to the dc-bus capacitors in every switching half cycle. Whereas, the boost coupling inductor keeps the dc-bus voltage always above the peak of ac input voltage. Therefore, the proposed ballast maintains unity-power-factor and high efficiency with ripple-free input current over wide range of input line voltage in case of worst regulation. A symmetrical half-bridge inverter is used to drive the fluorescent lamps. The experimental results of the laboratory prototype ballast for 2 × 36 W fluorescent lamps operating at 50 kHz are presented.

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Authors and Affiliations

  1. Electrical Engineering Department, Visvesvaraya National Institute of Technology, South Ambazari Road, Nagpur, 440 011, India

    V. B. Borghate, H. M. Suryawanshi & G. A. Dhomane

Authors
  1. V. B. Borghate
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  2. H. M. Suryawanshi
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  3. G. A. Dhomane
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Correspondence to V. B. Borghate.

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Borghate, V.B., Suryawanshi, H.M. & Dhomane, G.A. Analysis and performance of novel and highly efficient electronic ballast operating at unity-power-factor. Sadhana 33, 523–535 (2008). https://doi.org/10.1007/s12046-008-0040-3

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  • DOI: https://doi.org/10.1007/s12046-008-0040-3

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