电源学报2024，Vol.22Issue(4)：12-19,8.DOI:10.13234/j.issn.2095-2805.2024.4.12
引入负载扰动观测的Boost变换器定频滑模控制
Fixed-frequency Sliding Mode Control with Load Disturbance Observation for Boost Converter
许加柱 1王家禹 1刘裕兴 1曾林俊 1梁志宏 1钟朝峰1
作者信息
- 1. 湖南大学电气与信息工程学院,长沙 410082
- 折叠
摘要
Abstract
The traditional linear control method for a Boost converter has a poor dynamic performance and weak robustness to load disturbance.To solve this problem,a fixed-frequency sliding mode current control method based on power balance is proposed.First,the observed value of load current is used to calculate the input power,which is required to maintain the stability of output voltage.Then,the input power of the converter is adjusted by controlling the inductor current,so that the system's state trajectory is restrained on the sliding mode surface that possesses invariance to load disturbance,thus ensuring the system's large signal stability and improving its dynamic performance.Finally,based on the equivalent control principle,the equivalent sliding mode control is achieved through the PWM technique to avoid problems of chattering and unstable switch frequency.Simulations of the Boost converter under the condition of step load change are carried out in Simulink,and the proposed method is compared with the traditional linear control method.Results show that when using the proposed method,the system's dynamic performance is better and its large signal stability under large load disturbances is guaranteed.关键词
Boost变换器/等效滑模控制/负载扰动/功率平衡/大信号稳定Key words
Boost converter/equivalent sliding mode control/load disturbance/power balance/large signal stability分类
信息技术与安全科学引用本文复制引用
许加柱,王家禹,刘裕兴,曾林俊,梁志宏,钟朝峰..引入负载扰动观测的Boost变换器定频滑模控制[J].电源学报,2024,22(4):12-19,8.
