BUCK变换器的模糊滑模积分控制  

Fuzzy Sliding Mode Integral Control for Buck Converter

作　　者：王素娥[1] 周超红 郝鹏飞[1] 张路[1] WANG Sue;ZHOU Chaohong;HAO Pengfei;ZHANG Lu(School of Electrical and Control Engineering,Shaanxi University of Science and Technology,Xi'an Shaanxi 710021,China)

机构地区：[1]陕西科技大学电气与控制工程学院,陕西西安710021

出　　处：《电子器件》2022年第1期45-50,共6页Chinese Journal of Electron Devices

基　　金：西安市科技计划项目(2020KJRC0001)。

摘　　要：由于BUCK变换器的非线性,多用模糊滑模对其控制,但传统模糊滑模控制器输出存在稳态误差,且滑模控制结构切换过快造成开关管损耗增加。基于此,在模糊滑模控制的基础上引入积分环节。滑模控制器输出控制率,模糊控制器柔化滑模控制器输出,削弱系统抖振。积分环节对模糊控制器输出和滑模控制器切换项输出之差进行积分,减小模糊滑模控制器输出的稳态误差,并使开关频率固定化,降低开关管损耗。仿真及实验结果表明,引入积分环节的模糊滑模控制器稳态误差降低,开关管开关频率固定,系统损耗得到有效降低。Due to the nonlinearity of DC/DC converter, fuzzy sliding mode is often used to control it. The traditional fuzzy sliding mode control has steady-state error and the switching of sliding mode control structure is too fast, resulting in the increase of switch loss. In view of this, an integral link is introduced on the basis of fuzzy sliding mode control. The sliding mode controller output the control rate, and the fuzzy controlled softens the output of sliding mode controller and weakens the chattering of the system. The integral part integrates the difference of fuzzy control output and the switching term output of sliding mode control, so as to fix the switching frequency, reduce the switch tube loss and eliminate the steady-state error. The simulation and experimental results show that the steady-state error of the fuzzy sliding mode control with integral link is minimal, and the switching frequency of the switch tube is fixed, which effectively reduces the system loss.

关 键 词：BUCK变换器 滑模控制 模糊控制 积分环节 

分 类 号：TM46[电气工程—电器]