摘要
用变结构控制(VSC)理论设计脉宽调制(PWM)控制系统时,存在的主要困难是VSC的开关频率不恒定.为解决这一问题,提出一种"PWM-准滑动模态"的概念,利用这一概念,可建立起PWM与VSC之间的联系,分析出PWM控制系统的3种运行状态和稳定条件.最后以一个电力电子系统的应用为例,验证了所得结论的正确性.
When variable structure control (VSC) theory is used to design the pulse-width modulation (PWM) control system, the main problem is that the switching frequency of the VSC is inconsistent. To solve the problem, a concept, PWM-quasi-sliding mode, is proposed. By which the connection between PWM and VSC is established, the three operation states and stability conditions of PWM control system are analyzed. An application example in power electronic system proves the correction of the conclusions.
出处
《控制与决策》
EI
CSCD
北大核心
2008年第6期718-720,共3页
Control and Decision
基金
江苏省科技攻关计划项目(BE2005064)
关键词
变结构控制
滑动模态
脉宽调制
功率因素校正
Variable structure control (VSC)
Sliding mode
Pulse-width modulation (PWM)
Power factor correction (PFC)