Boost APFC电路反馈补偿网络的优化设计  

Optimal Design of Boost APFC Feedback Compensation Network

作　　者：刘霞[1] 

机构地区：[1]西安文理学院,陕西西安710065

出　　处：《现代电子技术》2009年第15期184-186,190,共4页Modern Electronics Technique

摘　　要：采用电流注入法建立了Boost APFC电路的完整的小信号模型。在此基础上求出电流环和电压环的开环传递函数,讨论了反馈补偿网络优化设计数学模型的建立和求解问题。建立的优化数学模型,其电流环以其传递函数的开环穿越频率最大为优化目标,电压环以线纹波电压增益最小为优化目标,给出一个优化设计实例,它采用遗传算法对优化模型进行求解。结果表明,优化后电流环的开关噪声抑制能力和电压环的纹波抑制能力远远优于优化前。The whole small signal model of a Boost active power factor correction circuit is introduced using the current injected equivalent circuit approach. Open transfer functions of both the current loop and the voltage loop are deduced based on it. Modeling and solving the optimal design of feedback compensation networks are discussed. The optimal mathematical mo - dels are built on the objectives to maximize the cross - over frequency for the current loop and to minimize the gain of line ripple voltage for the voltage loop. An example of the optimal design is provided and correspondent mathematical models are solved using Genetic Algorithms. As a result, both the capability of suppressing the switching noise of the current loop and restraining the ripple of the voltage loop are far better than the originals.

关 键 词：功率因数校正 小信号模型 反馈补偿网络 优化设计 遗传算法 

分 类 号：TN72[电子电信—电路与系统]