An improved topology of electronic ballast with wide dimming range,PFC and low switching losses using PWM-controlled soft-switching inverter |
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Authors: | Seyed Hossein Hosseini Mehran SabahiAli Yazdanpanah Goharrizi |
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Affiliation: | Faculty of Electrical and Computer Engineering, University of Tabriz, Tabriz, Iran |
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Abstract: | This paper presents a novel improved topology of voltage-fed soft-switching LCrCdc series–parallel quasi-resonant inverter with a constant-frequency for electronic ballast applications. This new topology introduces a low-cost solution to reduce switching losses to achieve high-efficiency ballast. A symmetrical pulse wide modulation (PWM) control scheme is implemented to regulate a wide range of output power. Switching losses effect on ballast efficiency is discussed through experimental point of view. In this discussion, an improved topology in which accomplishes soft-switching operation over a wide power regulation range is proposed. Energy consumption of this new circuit is decreased by using reverse recovery attribute. Additionally, a power-factor correction (PFC) circuit is employed to make the line current follow naturally the sinusoidal line voltage waveform. |
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Keywords: | Dimmable electronic ballast Soft-switching operation PWM control strategy |
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