Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Novel High Step-Up DC/DC Converter Structure Using a Coupled Inductor with Minimal Voltage Stress on the Main Switch

  • Moradzadeh, Majid (Faculty of Electrical and Computer Engineering, University of Tabriz) ;
  • Hamkari, Sajjad (Faculty of Electrical and Computer Engineering, University of Tabriz) ;
  • Zamiri, Elyas (Faculty of Electrical and Computer Engineering, University of Tabriz) ;
  • Barzegarkhoo, Reza (Faculty of Electrical Engineering, Sahand University of Technology (SUT))
  • Received : 2016.03.27
  • Accepted : 2016.06.24
  • Published : 2016.11.20
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Abstract

A high-step-up DC/DC converter for renewable energy systems is proposed. The proposed structure provides high voltage gain by using a coupled inductor without the need for high duty cycles and high turn ratios. The voltage gain is increased through capacitor-charging techniques. In the proposed converter, the energy of the leakage inductors of the coupled inductor is reused. This feature reduces the stress on the switch. Therefore, a switch with low ON-state resistance can be used in the proposed converter to reduce losses and increase efficiency. The main switch is placed in series with the source. Therefore, the converter can control the energy flow from the source to the load. The operating principle is discussed in detail, and a steady state analysis of the proposed converter is conducted. The performance of the proposed converter is verified by experimental results.

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