Investigation and Implementation of Step-Down Transformerless S S Single Switch AC/DC Converter
Dhirendra Haridas1, R. Dhanalakshmi2
1Dhirendra Haridas, Department of Electrical and Electronics, Dayananda Sagar College of Engineering, Visvesvaraya Technological University, Shavige Malleswara Hills, Kumaraswamy Layout, Bangalore (Karnataka),India.
2R. Dhanalakshmi, Department of Electrical and Electronics, Dayananda Sagar College of Engineering, Visvesvaraya Technological University, Shavige Malleswara Hills, Kumaraswamy Layout, Bangalore (Karnataka),India.
Manuscript received on 20 January 2014 | Revised Manuscript received on 25 January 2014 | Manuscript published on 30 January 2014 | PP: 89-93 | Volume-2 Issue-6, January 2014 | Retrieval Number: F0945012614/2014©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 transformerless single-stage single switch AC/DC converter with direct power transfer is presented in this paper. Unlike existing single-stage ac/dc converters with uncontrolled intermediate bus voltage, a new high step-down transformerless single-stage single switch ac/dc converter achieving intermediate bus voltage regulation and output voltage regulation is proposed. With the direct power transfer feature, the converter is able to achieve efficient power conversion, low voltage stress on intermediate bus (less than 120V) and low output voltage. The topology integrates a buck-type power-factor correction (PFC) cell with a buck–boost dc/dc cell and part of the input power is coupled to the output directly after the first power processing. A detailed analysis of the proposed converter for regulated intermediate bus voltage and output voltage with simulation results are presented in this paper a prototype circuit is implemented to verify the performance.
Keywords: AC/DC, (PFC).
Scope of the Article: Routing, Switching and Addressing Techniques