摘要
矢量控制的基本原理是建立在异步电机的稳态模型之上,而实际运行中电机的参数变化很大,这就极大的影响了控制系统的性能。文中根据闭环对参数变化具有抵抗作用,在控制策略中设计了转速,电流,磁链等多个闭环,采用了对参数依赖性很小的偏差电压解耦方式,并结合电机的电压模型和电流模型对传统的转子磁链计算进行了补偿和修正。从理论分析可以看出该系统能有效地降低参数变化对系统的影响,能够快速响应电机运行的动态过程。MATLAB仿真结果表明该控制系统精度高,实时性好,受电机参数变化的影响也有很大的降低。
The basic principle of vector control is established based on steady - state model of asynchronous motor, however motor parameters vary greatly in real - time operation, which affects greatly the performance of the control system. Because the closed loop can resist to parameter varication, this paper designs multi - closed loops of the rotational speed, current and flux, adopts deviation voltage decoupling which little depends on parameters, and compensates and corrects the conventional calculation of rotor flux. The theoretical analysis shows that this system effectively reduces the bad effect of the parameters variation, and quickly responds to the dynamic - state process of motor operating. The matlab simulation indicates that this control system has the advantages of high precision, real - time and can reduce the bad effect of the parameters variation.
出处
《计算机仿真》
CSCD
2007年第9期297-300,共4页
Computer Simulation
关键词
参数变化
偏差电压解耦
矢量控制
Parameters variation
Deviation voltage decoupling
Vector control
