alexa Analysis of Bridgeless SEPIC Converter with Minimum Component Stress and Conduction Losses for the Speed Control of Dc Motor
ISSN ONLINE(2278-8875) PRINT (2320-3765)

International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering
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Special Issue Article

Analysis of Bridgeless SEPIC Converter with Minimum Component Stress and Conduction Losses for the Speed Control of Dc Motor

Athira K Rajan1, Rajan P Thomas2, Neena Mani3
  1. PG Scholar, Mar Athanasius College of Engineering, Kothamangalam, Kerala, India1
  2. Professor, Mar Athanasius College of Engineering, Kothamangalam, Kerala, India 2
  3. Assistant Professor, Mar Athanasius College of Engineering, Kothamangalam, Kerala, India 3
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Abstract

This paper focuses the design of Bridgeless SEPIC topology having reduced switching and conduction losses with improved power factor. It is designed to work in Discontinuous Conduction Mode (DCM). The topology is improved by the absence of an input diode bridge and the presence of only two semiconductor switches in the current flowing path during each switching cycle which results in lesser conduction losses and improved thermal management compared to the conventional SEPIC converters. In this proposed SEPIC converter a coupled inductor is used to reduce ripple and limit inductance requirement. In this paper the input current ripple is significantly reduced by utilizing an additional winding of the input inductor and an auxiliary capacitor. The input current in a switching period is proportional to the input voltage and near unity power is achieved. The DC drive is used as a load. This converter is investigated theoretically and the performance comparisons of this proposed converter is verified with MATLAB simulation.

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