基于开关电感的二次型Buck-Boost变换器

doi:10.19595/j.cnki.1000-6753.tces.L90479

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Abstract In order to reduce the input inductor current stress of the basic quadratic Buck-Boost converter, a quadratic Buck-Boost converter based on switched inductance is proposed. The energy transmission process of the converter under L₁-CCM/L₂-CCM/ L₃-CCM is analyzed in detail. It is pointed out that whether the inductance L₁ and L₂ are equal in this mode only affects the working mode of the converter; the relational expressions of the converter voltage gain, the input inductor current stress expression are derived. The CCM and DCM critical conditions and critical inductance values of the inductors L₁, L₂, and L₃ are given. Compared with the basic quadratic Buck-Boost converter, the converter voltage gain is increased by two times, and the input inductance current stress is reduced by one time. The feasibility of the proposed circuit and the correctness of the theoretical analysis are verified by simulation and experiment.

Key words： Quadratic Buck-Boost switch inductance energy transfer mode critical inductance

Received: 11 July 2020

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TM46

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	Liu Shulin
	Wang Bin
	Zhu Gaozhong
	Wang Hangjie

Cite this article:

Liu Shulin,Wang Bin,Zhu Gaozhong等. Quadratic Buck-Boost Converter Based on Switched Inductance[J]. Transactions of China Electrotechnical Society, 2022, 37(zk1): 190-197.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.L90479 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/Izk1/190

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