Journal of Guangxi Normal University(Natural Science Edition) ›› 2020, Vol. 38 ›› Issue (4): 11-20.doi: 10.16088/j.issn.1001-6600.2020.04.002

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Interleaved Parallel Symmetric Boost Converter

WANG Guoping, ZHU Longji*   

  1. School of Electrical and Information Engineering, Anhui University of Science and Technology, Huainan Anhui 232001, China
  • Received:2019-11-17 Published:2020-07-13

Abstract: An interleaved parallel symmetric Boost converter is proposed. The converter has a simple structure,and the switching capacitor is added to the traditional staggered parallel boost converter, which doubles the input /output voltage conversion ratio of the converter and the voltage of the switching device is reduced to half the output voltage. Compared with the traditional interleaved Boost converter, the converter has a simple structure, doubles the input/output voltage conversion ratio, and the voltage stress of the switching device is only half of the output voltage. Three different duty cycle modes are derived from the interleaved parallel structure of the circuit. A control method of mixing the equal duty ratio and the unequal duty ratio mode is proposed by analyzing different duty cycle modes. The output control method using the hybrid control method avoids the overshoot of the output voltage at startup, and the output voltage fluctuation of the hybrid control compared with the traditional control method is reduced by 93.3%. The correctness of the theoretical analysis is verified by simulations. This new Boost converter is very suitable for applications when large conversion ratios are required and load is unstable.

Key words: Boost converter, power switch, hybrid control, interleaved parallel symmetric, duty ratio

CLC Number: 

  • TM46
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[1] SHI Linlin , ZHU Longji , ZHU Hong. Research of Reducing the Stress on the Switchin the Coupled Inductor Boost Circuit [J]. Journal of Guangxi Normal University(Natural Science Edition), 2016, 34(2): 15-20.
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