The Experts below are selected from a list of 2448 Experts worldwide ranked by ideXlab platform
Bhim Singh - One of the best experts on this subject based on the ideXlab platform.
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A high‐power quality battery charger for light electric vehicle using switched inductor PFC converter
'Institution of Engineering and Technology (IET)', 2021Co-Authors: Radha Kushwaha, Bhim SinghAbstract:Abstract This work is focused on a new power quality improved battery charger for electric vehicle using a two switch power factor correction (PFC) single‐ended Primary Inductance converter (SEPIC) at the front‐end followed by a flyback converter. The single‐ended Primary Inductance converter is a high step‐up PFC converter with a switched inductor configuration at the input. Over a conventional single‐ended Primary Inductance converter, this new configuration operates with reduced duty ratio for a given DC‐link voltage. By using few additional components, this new single‐ended Primary Inductance converter offers reduced switch voltage stress to produce the same DC‐link voltage. The operation at lower duty cycle, gives the improved efficiency over a conventional SEPIC PFC converter. The built‐in advantage of soft switching in devices, is achieved due to discontinuous conduction mode based design for both power factor correction converter and flyback converter. The power quality improvement in charger is validated at steady state as well as under variation in input voltage and DC‐link voltage, to meet the IEC 61000‐3‐2 regulations. Performance of this charger is verified in constant current mode with high step‐up gain of power factor correction converter and lower stress across the devices over a conventional single‐ended Primary Inductance configuration
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a pfc based ev battery charger using a bridgeless isolated sepic converter
IEEE Transactions on Industry Applications, 2020Co-Authors: Bhim Singh, Radha KushwahaAbstract:Conventional power factor correction (PFC) circuits in electric vehicle (EV) battery chargers have the efficiency limitation due to high conduction loss associated with a diode bridge rectifier (DBR) at the input. To mitigate this issue, a bridgeless (BL) single ended Primary Inductance converter (SEPIC) with improved power quality, is presented in this article. The input current shows a unity power factor operation over the entire charging duration. Due to elimination of DBR and the current conduction through relatively less number of devices, conduction losses are significantly reduced. This, in turn, improvises the charger efficiency as compared to conventional BL SEPIC converter. The overall performance of proposed charger is illustrated with the help of various operating modes, design equations, simulation-based performance and experimental validation under steady state as well as over wide fluctuations in ac mains voltage. The EV battery is charged at constant current/ constant voltage control mode, which provides satisfactory results for improved efficiency and inherent PFC, thus, improving overall performance of the charger.
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a pfc based ev battery charger using a bridgeless sepic converter
IEEE Power India International Conference, 2016Co-Authors: Bhim Singh, Radha KushwahaAbstract:Conventional PFC circuits in EV (Electric Vehicle) battery chargers have the efficiency limitation due to high conduction loss associated with a diode bridge rectifier (DBR) at the input. To mitigate this issue, a bridgeless single ended Primary Inductance converter (SEPIC) with improved power quality is presented in this paper. The input current drawn by the charger shows a unity power factor operation in a complete switching cycle. Due to elimination of DBR, conduction losses are significantly reduced. The proposed converter works well for making the input current perfectly sinusoidal along with an improved power quality parameters which conforms to the limits prescribed by international IEC-61000–3–2 PQ standard. The overall performance of the proposed 1kW, 65Vconverter is described with the help of various operating modes, design equations and MATLAB based analysis in steady state as well as dynamic conditions for charging a 48V 100Ah battery for EV. The battery is charged at constant current/ constant voltage control mode and it provides satisfactory results for inherent power factor correction, thus, improving overall performance of the charger.
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an adjustable speed pfc bridgeless sepic fed brushless dc motor drive
European Conference on Cognitive Ergonomics, 2015Co-Authors: Vashist Bist, Bhim Singh, Ambrish Chandra, Kamal AlhaddadAbstract:This paper presents a bridgeless-single ended Primary Inductance converter (BL-SEPIC) fed brushless DC (BLDC) motor drive for low power household applications. The speed of the BLDC motor is controlled by adjusting the DC link voltage of the VSI feeding a BLDC motor. The VSI feeding BLDC motor is used for achieving an electronic commutation of the BLDC motor and operates in a low frequency switching for reduced switching losses in it. A bridgeless configuration of SEPIC is proposed which offers lower conduction losses due to the elimination of diode bridge rectifier (DBR) at the front end. A PFC based BL-SEPIC is designed to operate in a discontinuous inductor current mode (DICM) for achieving an inherent power factor correction at AC mains using a single voltage sensor. The performance of the proposed drive is validated with experimental results obtained on a developed prototype. An improved power quality is achieved at the AC mains for all conditions and the obtained power quality indices are achieved within the limits of international power quality standard IEC 61000-3-2.
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reduced sensor configuration of a power factor correction based single ended Primary Inductance converter fed brushless dc motor drive
Iet Power Electronics, 2015Co-Authors: Vashist Bist, Bhim SinghAbstract:This study presents a power factor correction-based single-ended Primary Inductance converter (PFC-SEPIC) feeding brushless DC (BLDC) motor drive for low-power household appliances. In a conventional scheme of BLDC motor, the speed is varied by controlling the duty ratio of high-frequency pulse width modulation signals, which increase the switching losses in the voltage source inverter (VSI) feeding BLDC motor. However, this study presents a BLDC motor of which the speed is controlled by adjusting the DC bus voltage of the VSI feeding BLDC motor. Moreover, a fundamental switching frequency of VSI is employed for reduction of its switching losses by operating the BLDC motor in electronic commutation. A PFC-based SEPIC is designed for its operation in discontinuous inductor current mode such that the voltage control is achieved using a single voltage sensor with inherent PFC at AC mains; which also makes it a cost effective solution for low power applications. The proposed drive is implemented on the developed converter for the performance evaluation. This drive shows high efficiency as compared with conventional schemes of BLDC motor drive with satisfactory power quality performance at various speeds satisfying IEC 61000-3-2 standard.
Ivo Barbi - One of the best experts on this subject based on the ideXlab platform.
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isolated three phase high power factor rectifier based on the sepic converter operating in discontinuous conduction mode
IEEE Transactions on Power Electronics, 2013Co-Authors: Gabriel Tibola, Ivo BarbiAbstract:This paper presents the analysis and design of a three-phase high power factor rectifier, based on the dc-dc single-ended Primary-Inductance converter (SEPIC) operating in discontinuous conduction mode, with output voltage regulation and high frequency isolation. The input high power factor is naturally attained through the operational mode without the use of current sensors and a current control loop. To validate the theoretical analysis, a design example and experimental results for a 4-kW, 380-V line-to-line input voltage, 400-V output voltage, 0.998 power factor, 40-kHz switching frequency, and 4% input current total harmonic distortion laboratory prototype are presented, considering two distinct modulators. In addition, experimental results for the output voltage closed-loop control are presented.
Juan Manuel Enrique Gomez - One of the best experts on this subject based on the ideXlab platform.
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new single input multiple output converter topologies combining single switch nonisolated dc dc converters for single input multiple output applications
IEEE Industrial Electronics Magazine, 2016Co-Authors: Maria Bella Ferrera Prieto, S P Litran, Eladio Duran Aranda, Juan Manuel Enrique GomezAbstract:This article presents a methodology that allows the development of new converter topologies for single-input, multiple-output (SIMO) from different basic configurations of single-input, single-output dc-dc converters. These typologies have in common the use of only one power-switching device, and they are all nonisolated converters. Sixteen different topologies are highlighted, and their main features are explained. The 16 typologies include nine twooutput-type, five three-output-type, one four-output-type, and one six-output-type dc-dc converter configurations. In addition, an experimental prototype of a three-output-type configuration with six different output voltages based on a single-ended Primary Inductance (SEPIC)-Cuk-boost combination converter was developed, and the proposed design methodology for a basic converter combination was experimentally verified.
Rafael Christiano Annunziato - One of the best experts on this subject based on the ideXlab platform.
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a modified sepic converter for high power factor rectifier and universal input voltage applications
IEEE Transactions on Power Electronics, 2010Co-Authors: P F De Melo, Roger Gules, Eduardo Felix Ribeiro Romaneli, Rafael Christiano AnnunziatoAbstract:A high-power-factor rectifier suitable for universal line base on a modified version of the single-ended Primary Inductance converter (SEPIC) is presented in this paper. The voltage multiplier technique is applied to the classical SEPIC circuit, obtaining new operation characteristics as low-switch-voltage operation and high static gain at low line voltage. The new configuration also allows the reduction of the losses associated to the diode reverse recovery current, and soft commutation is obtained with a simple regenerative snubber circuit. The operation analysis, design procedure, and experimental results obtained from a 650-W universal line power-factor-correction prototype of the proposed converter are presented. The theoretical analysis and experimental results obtained with the proposed structure are compared with the classical boost topology.
Gabriel Tibola - One of the best experts on this subject based on the ideXlab platform.
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isolated three phase high power factor rectifier based on the sepic converter operating in discontinuous conduction mode
IEEE Transactions on Power Electronics, 2013Co-Authors: Gabriel Tibola, Ivo BarbiAbstract:This paper presents the analysis and design of a three-phase high power factor rectifier, based on the dc-dc single-ended Primary-Inductance converter (SEPIC) operating in discontinuous conduction mode, with output voltage regulation and high frequency isolation. The input high power factor is naturally attained through the operational mode without the use of current sensors and a current control loop. To validate the theoretical analysis, a design example and experimental results for a 4-kW, 380-V line-to-line input voltage, 400-V output voltage, 0.998 power factor, 40-kHz switching frequency, and 4% input current total harmonic distortion laboratory prototype are presented, considering two distinct modulators. In addition, experimental results for the output voltage closed-loop control are presented.