前缘调制Buck型DC-DC变换器的周期借用数字电流控制  

Digital Cycle-borrowing Current Control for Buck DC-DC Converters with Front-edge Modulation

作　　者：史学[1] 魏廷存[1] 李峰[1] 

机构地区：[1]西北工业大学计算机学院,陕西西安710072

出　　处：《微电子学与计算机》2013年第6期66-70,共5页Microelectronics & Computer

基　　金：陕西省科技统筹创新工程计划项目(2011KTCQ01-22)

摘　　要：为了解决数字电流控制环路带宽和硬件处理速度之间的矛盾,提出了基于前缘调制Buck型DC-DC变换器的周期借用数字电流控制方法.针对谷值、平均值和峰值电流控制方法分别建立了相应的控制律;分析了它们可能存在的次谐振荡,并提出了相应的解决方案;分析了周期借用数字电流控制变换器的鲁棒性.仿真结果表明,基于前缘调制的周期借用数字电流控制达到了与无拍差电流控制相同的瞬态响应性能,同时更好地匹配了硬件处理速度.In this paper digital cycle-borrowing current control method for buck DC-DC converters with front-edge modulation is proposed to solve the contradiction between the processing speed of hardware and loop bandwidth in the current control mode. The corresponding control laws for the valley, average and peak current control methods have been established. The sub-harmonic oscillation possibly existed has been analyzed, and the corresponding solutions are provided. The robustness of buck DC-DC converters with digital cycle-borrowing current control is also given. The simulation results show that the digital cycle-borrowing current control for buck DC-DC converters with front-edge modulation achieved the same transient response performances as the no beat current control, and also it matched the hardware processing speed better.

关 键 词：前缘调制 Buck型DC-DC变换器 次谐振荡 数字电流控制 

分 类 号：TN4[电子电信—微电子学与固体电子学]