Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Analysis and Implementation of a New Single Switch, High Voltage Gain DC-DC Converter with a Wide CCM Operation Range and Reduced Components Voltage Stress

  • Honarjoo, Babak (Department of Electrical Engineering, University of Isfahan) ;
  • Madani, Seyed M. (Department of Electrical Engineering, University of Isfahan) ;
  • Niroomand, Mehdi (Department of Electrical Engineering, University of Isfahan) ;
  • Adib, Ehsan (Department of Electrical and Computer Engineering, Isfahan University of Technology)
  • Received : 2017.04.18
  • Accepted : 2017.08.14
  • Published : 2018.01.20
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Abstract

This paper presents a single switch, high step-up, non-isolated dc-dc converter suitable for renewable energy applications. The proposed converter is composed of a coupled inductor, a passive clamp circuit, a switched capacitor and voltage lift circuits. The passive clamp recovers the leakage inductance energy of the coupled inductor and limits the voltage spike on the switch. The configuration of the passive clamp and switched capacitor circuit increases the voltage gain. A wide continuous conduction mode (CCM) operation range, a low turn ratio for the coupled inductor, low voltage stress on the switch, switch turn on under almost zero current switching (ZCS), low voltage stress on the diodes, leakage inductance energy recovery, high efficiency and a high voltage gain without a large duty cycle are the benefits of this converter. The steady state operation of the converter in the continuous conduction mode (CCM) and discontinuous conduction mode (DCM) is discussed and analyzed. A 200W prototype converter with a 28V input and a 380V output voltage is implemented and tested to verify the theoretical analysis.

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