摘要
在电感电流连续导通的模式下,提出一种基于反步法的Buck变换器并联系统的均流控制方法.该方法在Buck变换器并联系统状态方程的基础上,引入一个表示电感电流间误差积分的状态量,然后拓展状态向量,得到拓展后的状态方程.针对该状态方程,根据反步法的原理,设计了Buck变换器并联系统的反步均流控制律.仿真结果表明,与未采用均流控制方法相比,基于反步法的均流控制律可以实现良好的均流效果,同时具有较强的鲁棒性.
Based on the backstepping method in the continuous conduction mode of inductor current, a current sharing control method of the paralleled Buck converter system is proposed. On the basis of a state equation of the paralleled Buck converter system, a state which expresses the integration of errors between inductor currents is introduced and then the state vector is expanded and finally the expanded state equation is obtained. For the proposed state equation, according to the principle of the backstepping method, the backstepping current sharing control law of the paralleled Buck converter system is designed. The simulation results show that compared with the method without any current sharing control, the current sharing control law based on the backstepping method can achieve good current sharing effect and has strong robustness.
出处
《云南民族大学学报（自然科学版）》
CAS
2009年第3期255-259,共5页
Journal of Yunnan Minzu University:Natural Sciences Edition
关键词
BUCK变换器
连续导通模式
反步法
均流控制
鲁棒性
Buck converter
continuous conduction mode
backstepping method
current sharing control
robustness
