摘要
提出一种新颖的PWM变换器非线性控制新策略,通过引入一个非线性积分器,并采用等间隔反向线性复位法,强制被控开关变量平均值在每一个完整的开关周期中严格等于控制基准,彻底解决了因电力电子器件开关时间导致的开关误差,实现变换器在输入电源变化时的零稳态误差。利用带自动积分限幅功能的控制器,在电感电流连续或不连续模式、以及临界状态下,系统均能稳定可靠的工作。利用带双前馈补偿的控制器,变换器对负载扰动的抑制能力显著改善,系统动态响应实现了工程最优动态响应。新策略具有良好的通用性,适用于各种硬开关或软开关方式的Buck、Cuk、半桥或全桥变换器,以及由他们派生出来的其他变换器。
A new nonlinear control method is proposed to control switch-mode power converters. The controller can correct switching errors thoroughly with linear resetting technique reversely. There is no steady-state error when the power source voltage is perturbed. The converter can operate steadily with automatic limited integration output under the condition of discontinuous conduction or critical condition. The double feed-forward compensation provides optimizing transient response for load disturbance. The proposed method can get excellent performance in power source perturbation rejection, following the reference and load disturbance rejection. The proposed method is very general and applicable to most types of resonant based, or soft-switched PWM converters.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2003年第12期133-139,共7页
Proceedings of the CSEE
