Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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H-type Structural Boost Three-Level DC-DC Converter with Wide Voltage-Gain Range for Fuel Cell Applications

  • Bi, Huakun (School of Electrical and Information Engineering, Tianjin University) ;
  • Wang, Ping (School of Electrical and Information Engineering, Tianjin University) ;
  • Che, Yanbo (School of Electrical and Information Engineering, Tianjin University)
  • Received : 2018.04.20
  • Accepted : 2018.07.15
  • Published : 2018.09.20
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Abstract

To match the dynamic lower voltage of a fuel cell stack and the required constant higher voltage (400V) of a DC bus, an H-type structural Boost three-level DC-DC converter with a wide voltage-gain range (HS-BTL) is presented in this paper. When compared with the traditional flying-capacitor Boost three-level DC-DC converter, the proposed converter can obtain a higher voltage-gain and does not require a complicate control for the flying-capacitor voltage balance. Moreover, the proposed converter, which can draw a continuous and low-rippled current from an input source, has the advantages of a wide voltage-gain range and low voltage stress for power semiconductors. The operating principle, parameters design and a comparison with other converters are presented and analyzed. Experimental results are also given to verify the aforementioned characteristics and theoretical analysis. The proposed converter is suitable for application of fuel cell systems.

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References

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