一种具有快速动态响应的新型数字PFC控制器

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Abstract A new discontinuous conduction mode(DCM) digital power factor coorection(PFC) controller is presented in this paper. The main control employs segmented self-adaptive PI control strategy that can adjust control parameters in real time according to the changes of load and input voltages,to improve system's ability of disturbance rejection and speed up system's dynamic response. Auxiliary control introduces a novel start-up current peak suppression strategy,which,based on operating mode control to limit the maximum duty ratio to make the circuit operates in DCM,can suppress start-up current peak and at the same time can serve enough energy,and ensure a fast start-up of the system. The experiment results show that the digital PFC system under the testing environment with 110~230V input voltage and 140W maximum input power,the maximum PF value is 0.995 8 and the maximum efficiency is 95.68%. The start-up time is always less than 10 power frequency cycles during test and there is not voltage overshoot and start-up surge current. The maximum response time of load changing is 179ms,and the minimum 21ms. Voltage overshoot is 10%~20%.

Key words： Digital control power factor correction dynamic response nonlinear control peak current

Received: 20 February 2014 Published: 22 January 2015

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TN46

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	Articles by authors
	Xu Shen
	Wang Qing
	Sun Daying
	Sun Weifeng

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Xu Shen,Wang Qing,Sun Daying等. A New Digital Boost PFC Controller with Fast Dynamic Response[J]. Transactions of China Electrotechnical Society, 2014, 29(12): 88-94.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2014/V29/I12/88

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