SG3525在Buck-Boost直流变换器中的应用  

Application of SG3525 in the Buck-Boost DC-DC converter

作　　者：皇金锋[1] 董锋斌[1] 

机构地区：[1]陕西理工学院电气工程系,陕西汉中723003

出　　处：《电子技术应用》2009年第8期82-84,共3页Application of Electronic Technique

基　　金：陕西省教育厅资助项目(07JK203);陕西理工学院资助项目(SLG0804)

摘　　要：针对基于Buck-Boost直流变换器的非线性、时变、周期性系统,利用状态空间平均法以及欧拉公式建立了该变换器电感电流工作在CCM模式下的小信号模型,得到了相应的交流小信号传递函数。由于传递函数中存在S平面右半平面的零点,系统成为非最小相位系统。利用SG3525组建了闭环控制系统,利用有源超前滞后补偿网络对系统进行了校正,实验结果验证了模型和控制方法的合理性。For the non-linear,time-varying and periodic Buck-Boost DC-DC converter, the small-singal models are set up with state-space average method and Euler formula with the inductor current in the CCM, the AC small-signal transfer funcations are deduced. Transfer funcation exists a zero of right half S surface, the system becomes a non-mininum phase system. The active lead-lag compensation net is made up of SG3525 to correct the closed system. The experimental results show the models and control method are rationality.

关 键 词：SG3525 Buck—Boost直流变换器 非最小相位系统 

分 类 号：TM46[电气工程—电器]