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RONG Desheng,GAO Yan,HU Jushuang,DUAN Zhitian.Magnetic Integrated Boost Converter with LCL Unit[J].JOURNAL OF POWER SUPPLY,2021,19(2):22-27
Magnetic Integrated Boost Converter with LCL Unit
Received:August 31, 2017  Revised:February 22, 2021
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DOI:10.13234/j.issn.2095-2805.2021.2.22
Keywords:LCL unit  Boost converter  magnetic integration technique  switched capacitor
Fund Project:Supported by National Natural Science Foundation of China(No.51177067); Liaoning Province Natural Science Foundation of China(No.201602359).
           
AuthorInstitutionEmail
RONG Desheng Faculty of Electrical and Control Engineering, Liaoning Technical University, Huludao , China
GAO Yan Faculty of Electrical and Control Engineering, Liaoning Technical University, Huludao , China 1491106660@qq.com
HU Jushuang Shijiazhuang Power Supply Company, State Grid Hebei Electric Power Co., Ltd, Shijiazhuang , China
DUAN Zhitian Faculty of Electrical and Control Engineering, Liaoning Technical University, Huludao , China
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Abstract:
      An LCL unit consisting of two inductors, one capacitor and two diodes is presented, so that the voltage gain of the traditional Boost converter can be improved owing to the energy storage function of this unit. The inductors are coupling integrated by using the magnetic integration technology, thereby reducing the inductor current ripple. By introducing a capacitor C2, the voltage gain can be further improved while reducing the voltage stress of the switching tube. The working principle of the novel converter is analyzed, and the expressions of voltage gain, voltage stress of switching devices, and inductor current ripple are derived. Compared with the traditional Boost converter, the voltage gain of the proposed converter is 3-D times higher, and the inductor current ripple is reduced by nearly 50%. In addition, the voltage stress of switching devices is 2/(3-D) of the output voltage. Finally, the simulation and experimental results verified the theoretical analysis.
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