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A Three-Level Integrated AC–DC Converter
IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 29, NO. 4, APRIL 2014

Abstract—In this paper, a new integrated three-level ac–dc converter is presented. The proposed
converter integrates the operation of the boost power factor correction and the three-level dc–dc
converter. The converter is made to operate with two independent controllers—an input
controller that performs power factor correction and regulates the dc bus and an output controller
that regulates the output voltage. The input controller prevents the dc-bus voltage from becoming
excessive while still allowing a single-stage converter topology to be used. The paper explains
the operation of the new converter in detail and discusses its features and a procedure for its
proper design. Experimental results obtained from a prototype are presented to confirm the
feasibility of the new converter.
Index Terms—AC–DCpower conversion, single-stage power factor correction (SSPFC), threelevel converters.
Block diagram:-

Conclusion
A new multilevel single-stage ac–dc converter is proposed in the paper. This converter is operated with two
controllers— one controller that performs input PFC and a second controller that regulates the output voltage. The
outstanding feature of this converter is that it combines the performance of two-stage converters with the reduction
of cost of single-stage converters. The paper introduces the proposed converter, explains its basic operating
principles and modes of operation, and discusses its design with respect to different dc-bus voltages. Experimental
results that confirm the feasibility of the converter are also presented in the paper.

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A Three-Level Integrated AC–DC Converter

  • 1. A Three-Level Integrated AC–DC Converter IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 29, NO. 4, APRIL 2014 Abstract—In this paper, a new integrated three-level ac–dc converter is presented. The proposed converter integrates the operation of the boost power factor correction and the three-level dc–dc converter. The converter is made to operate with two independent controllers—an input controller that performs power factor correction and regulates the dc bus and an output controller that regulates the output voltage. The input controller prevents the dc-bus voltage from becoming excessive while still allowing a single-stage converter topology to be used. The paper explains the operation of the new converter in detail and discusses its features and a procedure for its proper design. Experimental results obtained from a prototype are presented to confirm the feasibility of the new converter. Index Terms—AC–DCpower conversion, single-stage power factor correction (SSPFC), threelevel converters. Block diagram:- Conclusion A new multilevel single-stage ac–dc converter is proposed in the paper. This converter is operated with two controllers— one controller that performs input PFC and a second controller that regulates the output voltage. The outstanding feature of this converter is that it combines the performance of two-stage converters with the reduction of cost of single-stage converters. The paper introduces the proposed converter, explains its basic operating principles and modes of operation, and discusses its design with respect to different dc-bus voltages. Experimental results that confirm the feasibility of the converter are also presented in the paper.