一种具有快速动态响应的新型数字PFC控制器

发布时间：2018-01-22 05:31

本文关键词： 数字控制功率因数校正动态响应非线性控制尖峰电流　出处：《电工技术学报》2014年12期 　论文类型：期刊论文

【摘要】：本文设计了一款新型基于DCM工作模式的全数字PFC控制器,主控制采用了分段自适应PI控制策略,可根据负载、输入电压等的变化实时改变控制参数,不但能够提高系统的抗扰动能力,而且使得系统具有快速的动态响应性能。辅助控制引入了一种新颖的启动电流尖峰抑制策略,该策略基于工作模式控制,通过限制最大占空比使得电路工作在电流断续模式,在充分抑制启动电流尖峰的同时提供了足够的能量,保证了系统快速启动。实验结果表明,所设计的数字PFC系统在输入电压110~230V、最大输出功率140W的测试环境下,最大PF值为0.995 8,最大效率为95.68%。测试中系统启动时间均小于10个工频周期,无电压超调及启动浪涌电流。负载切换的响应时间最大179ms,最小21ms,过冲电压10%~20%。
[Abstract]:In this paper, a new digital PFC controller based on DCM mode is designed. The main control adopts a piecewise adaptive Pi control strategy, which can change the control parameters in real time according to the changes of load and input voltage. It can not only improve the anti-disturbance ability of the system, but also make the system have fast dynamic response performance. The auxiliary control introduces a novel strategy to suppress the peak of start-up current, which is based on the working mode control. By limiting the maximum duty cycle to make the circuit work in the current intermittent mode, it can fully restrain the peak of the starting current and provide sufficient energy to ensure the rapid start of the system. The designed digital PFC system has a maximum PF value of 0.995 8 under the test environment of 110V 230V and 140W maximum output power. The maximum efficiency is 95.68. In the test, the system startup time is less than 10 power frequency cycles, no voltage overshoot and start-up surge current. The maximum response time of load switching is 179 Ms and the minimum is 21 Ms. Overshoot voltage 10 / 20.
【作者单位】：东南大学电子科学与工程学院
【基金】：国家自然科学基金资助项目(61201034)
【分类号】：TM571
【正文快照】： 1引言在保证低输入电流谐波、良好的电源质量的前提下,提高输出电压动态响应速度以及电源转换效率逐渐成为PFC技术中的研究热点[1-5]。与传统的模拟PFC控制器相比,数字PFC控制器提供的电源管理功能,以及灵活的的控制算法近来受到越来越多的关注[2,4,5]。并且数字PFC控制技术很

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