A New Single Switch AC/DC Converter with Extended Voltage Conversion Ratio for SMPS Applications
L. Sri Sivani1, Nagi Reddy B2, K. Subba Rao3, A. Pandian4
1L.Sri Sivani, M.Tech, Department of Electrical and Electronics Engineering, KLEF, Vaddeswaram, Guntur (A.P), India.
2Nagi Reddy B, Ph.D, Department of Electrical and Electronics Engineering, KLEF, Vaddeswaram, Guntur (A.P), India.
3K.Subba Rao, Principal, Department of Electrical and Electronics Engineering, KLEF, Vaddeswaram, Guntur (A.P), India.
4A.Pandian, Professor, Department of Electrical and Electronics Engineering, KLEF, Vaddeswaram, Guntur (A.P), India.
Manuscript received on 05 January 2019 | Revised Manuscript received on 13 January 2019 | Manuscript published on 30 January 2019 | PP: 68-72 | Volume-8 Issue-3, January 2019 | Retrieval Number: C2578018319/19©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: A single switch AC/DC converter for SMPS applications is proposed in this paper for attaining extended voltage conversion range and unity input power factor. This AC/DC converter have a buck-boost PFC circuit that operates in discontinuous conduction mode (DCM) to attain unity input power factor and a buck converter to achieve tightly regulated voltage along with wide conversion range. Buck converter is also chosen to operate in discontinuous conduction mode because of its advantages like, zero switch current at turn-ON, low switching voltage stresses, independent voltage stresses from load variations and higher efficiencies. The proposed converter doesn’t require extra control technique to achieve unity power factor. The detailed operation is analysed and the essential equations are derived. To analyze the effectiveness of the proposed converter, MATLAB/SIMULINK software is used.
Keyword: Wide Voltage Conversion Range, AC/DC Converter, Unity Input Power Factor, Buck-Boost Buck Converter, Single-Switch.
Scope of the Article: Internet and Web Applications