摘要
针对传统的Boost型DC/DC变换器存在不稳定的零动态问题,Viswanathan K.提出了一种改进拓扑结构的三态Boost型DC/DC变换器。考虑到现有文献均采用小信号模型和相应的线性控制方法,难以发挥该三态Boost变换器的优势,为此,在建立三态Boost型DC/DC变换器大信号状态空间数学模型的基础上,根据其多变量、非线性特点,基于输入/输出反馈线性化提出一种新颖的非线性控制方法。自制的样机实验结果表明:与传统的PI控制方法相比,该新型非线性控制方案具有明显的优势,不仅输出电压的调节范围较宽、稳态偏差小,而且动态性能也明显改善。
In order to cope with unstable zero-dynamics problem in traditional Boost type DC/DC converter,Viswanathan K.proposed a modified topology which is known as tri-state Boost type DC/DC converter(TBDC).However,almost all presented literatures concerned with TBDC only apply small-signal model and corresponding linear control strategies to design its system,which limits its potentials to be fully utilized.This paper proposed a new type of large-signal state-space averaged mathematical model for TBDC.In view of its multi-variable,nonlinear features,a new nonlinear control method was presented for TBDC based on input/output feedback linearization.Experimental results of a self-manufactured prototyped show that this novel nonlinear control method has many advantages over traditional PI controller.It can not only widen the regulation range of output voltage,lower its steady-state error,but also improve the dynamic performance significantly.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2010年第S1期171-177,共7页
Proceedings of the CSEE
基金
山东省自然科学基金项目(ZR2009FZ002)~~
