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ABSTRACT: This paper presents a single-stage converter to drive high-intensity discharge metal halide lamps. The integration of two discontinuous conduction mode boost converters, in an interleaved way, with a half-bridge voltage inverter and the use of a square-current waveform applied to the lamp, results in an electronic ballast with high power factor and reduced power spectrum spread, avoiding fluctuations inside the discharge tube. To stabilize the lamp current and power, a feedback control loop was designed and implemented. The overall result was a ballast with an efficiency of 90% and a power factor above 0.98.
IEEE Transactions on Industrial Electronics 05/2012; · 5.16 Impact Factor
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ABSTRACT: This paper presents a single-stage power factor corrected (PFC) converter for driving a solid-state lighting (SSL) device through light-emitting diode (LED) for street lighting use. The converter is based on CIC-CPPFC (continuous input current charge-pump power factor correction) technique, achieving continuous input current with high power factor and reduced current ripple by means of a coupled inductor. The converter operates with zero voltage switching (ZVS) resulting in high efficiency for a wide load range. It is also a cost effective and competitive solution for low power applications, such as SSL, where a two stage approach is costly and passive filters are not recommended. Another feature is the absence of a bulky dc-link capacitor, reducing costs, increasing life-time and presenting a significant advantage over many single-stage solutions.
Industrial Electronics, 2009. IECON '09. 35th Annual Conference of IEEE; 12/2009
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ABSTRACT: This work presents a single stage converter to drive high intensity discharge metal halide (HID - MH) lamps. The integration of two DCM boost converters, in an interleaved way, with a half bridge voltage inverter and the use of a square current waveform applied to the lamp results in an electronic ballast with high power factor and reduced power spectrum spread to avoid the lamp's acoustic resonance. To stabilize the lamps power a low bandwidth feedback control loop was designed and implemented.
Energy Conversion Congress and Exposition, 2009. ECCE 2009. IEEE; 10/2009
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ABSTRACT: This paper presents a new single-stage power factor corrected (PFC) AC-DC converter. The topology is based on CIC-CPPFC (continuous input current charge-pump power factor correction) technique, achieving continuous conduction mode (CCM) input current with high power factor and reduced current ripple by using a coupled inductor, meeting IEC 61000-3-2 regulations for wide load range without additional input filter. The converter operates with zero voltage switching (ZVS) resulting in high efficiency for a wide load range. It is also a cost effective and competitive solution for low power applications where a two stage approach is costly and passive filters are not recommended. Another feature is the absence of a bulky delink capacitor, reducing costs and presenting a significant advantage over many single-stage solutions.
Power Electronics Specialists Conference, 2008. PESC 2008. IEEE; 07/2008
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ABSTRACT: An electronic ballast employing the voltage source-charge pump power factor correction concept is presented in this paper. Such characteristics as reliability, simplicity, and a small number of components are found in this electronic ballast. From the developed mathematical analysis, the unity power factor condition is obtained. Experimental results for a prototype applying the developed methodology to two 40-W lamps, using a fixed frequency drive, and to a second prototype with two 40-W lamps, using a self-oscillating drive, prove the efficiency of the proposed electronic ballast.
IEEE Transactions on Industrial Electronics 03/2008; · 5.16 Impact Factor
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ABSTRACT: This paper presents a high efficiency single-stage power factor correction ac-dc converter with zero voltage switching (ZVS). The proposed converter meets the IEC 61000-3-2 regulations with near unity power factor and ripple free input current. It is a cost effective and competitive solution for 100 600 W applications where a two stage approach is costly and passive filters are not recommended (J. Qian and F.C. Lee, 2000). To derive the design equations, an analysis is carried out in which the converter is divided into two stages. This approach simplifies the study. Experimental results for a 200 W converter are presented and discussed in order to validate the study and verify the performance of the proposed converter
IEEE Industrial Electronics, IECON 2006 - 32nd Annual Conference on; 12/2006
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ABSTRACT: A new family of electronic ballasts for fluorescent lamps employing the voltage source-charge pump power factor correction (VS-CPPFC) concept with no start-up C<sub>r</sub> capacitor is presented in this paper. Besides allowing the power factor correction, the C<sub>in</sub> capacitor has also the function of achieving the start-up process of the lamps. Thereby, the proposed electronic ballasts present a high input power factor and arise as an interesting solution for large scale production since the amount of components is reduced. The unity power factor condition is obtained from the developed mathematical analysis. Experimental results of a prototype applying the developed methodology for 2times40 W lamps using fixed frequency drive and of another prototype for 2times40 W lamps with a self-oscillating drive prove the effectiveness of the proposed electronic ballasts
Power Electronics Specialists Conference, 2006. PESC '06. 37th IEEE; 07/2006
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ABSTRACT: Studies and practical results regarding the integration of the PFC stage with the DC-AC conversion in electronic ballasts for fluorescent lamps are presented in this paper. The extension of the Moisin's topology is presented to allow the use of a full-bridge rectifier stage. The design procedures developed are extended to the continuous input current charge pump power factor correction (CIC-CPPFC). A performance comparison obtained through several integrations applied on commercial electronic ballasts is presented. One topological variation, where the charge-pump capacitors are connected directly on the rectifier stage, is presented. Both structures can improve the reliability, simplicity and lower the component count for electronic ballasts. Experimental results from a prototype designed using the methodology developed in this work are also shown.
Power Electronics Specialists Conference, 2004. PESC 04. 2004 IEEE 35th Annual; 07/2004
