具有输出短路保护能力的DC-DC换流器控制方法研究

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Abstract Due to economic, technological and other advantages, the DC converter has been widely used, and will be further developed. Boost converter is short of the ability to limit load current. Buck converter has the ability to limit short-circuit current, owing to outside inductance. The converter, consisting of Boost-Buck back-to-back structure, can limit the load short-circuit current perfectly by the control method presented in this paper. By voltage and current double closed-loop control, the converter works in the state of constant voltage source. When the loads short-circuit occurs, the converter works in the state of constant-current source by sampling the output inductor current for closed-loop control. By this control method, the converter has the ability of load short-circuit protection. System simulation and experimental results demonstrate this conclusion that with the proposed control method, the Boost-Buck converter has a good load short-circuit characteristics.

Key words： DC-DC converter constant current source small signal processing methods Short-circuit capacity

Received: 19 August 2013 Published: 22 May 2014

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TM77

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	Lu Yongfeng
	Wei Tongzhen
	Huo Qunhai

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Lu Yongfeng,Wei Tongzhen,Huo Qunhai. A DC-DC Converter Control Method with Output Short-circuit Protection Capability[J]. Transactions of China Electrotechnical Society, 2013, 28(2增): 292-297.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I2增/292

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