Design of Non-isolated integrated type AC-DC converter with extended voltage gain and high power factor for Class-C&D applications
Nagi Reddy. B1, A. Pandian2, O. Chandra Sekhar3, M. Rammoorty4

1Nagi Reddy. B, Department of EEE, Koneru Lakshmaiah Education Foundation, Guntur, (Andhra Pradesh), India.
2A. Pandian, Department of EEE, Koneru Lakshmaiah Education Foundation, Guntur, (Andhra Pradesh), India.
3O. Chandra Sekhar, Department of EEE, NIT, Srinagar, (J&K), India.
3M. Ramamoorty, Former Chancellor, Koneru Lakshmaiah Education Foundation, Guntur, (Andhra Pradesh), India.

Manuscript received on 24 January 2019 | Revised Manuscript received on 30 March 2019 | Manuscript published on 30 January 2019 | PP: 230-236 | Volume-7 Issue-6, March 2019 | Retrieval Number: E2079017519©BEIESP
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Abstract: In this paper, an integrated buck-boost buck (IB3 ) AC-DC converter is proposed with an extended voltage conversion ratio for the class-C&D applications. The proposed converter process the power from input to output in a single stage. This converter is an integration of traditional buck-boost converter and a buck converter shared by a common switch. To get unity input power factor the input buck-boost converter is designed to operate always in discontinuous conduction mode (DCM). The output buck converter is operated in continuous conduction mode (CCM). The necessary design equations have derived using theoretical analysis under steady-state conditions. The features of IB3 converter are fast and tightly regulated dc voltage with extensive voltage gain, unity input power factor and well suit for class-C&D applications with universal voltage range. The proposed IB3 converter is simulated using MATLAB/SIMULINK software to support the theoretical analysis.
Keywords: Ac-Dc Converter, Buck-boost buck, Integrated converter, Power factor correction (PFC), Extended voltage gain.
Scope of the Article: Low-power design