摘要
针对感应电动机在弱磁区的电流控制问题即电流分配与电流解耦控制,为实现最大力矩控制,根据感应电动机全频段运行范围内电流、电压、转矩与转速的关系,提出了一种不依赖于电机参数的电流分配方法。为克服耦合电压在高频区对电流控制的影响,提出了一种解耦过程无需电机参数的电流矢量控制器,实现了高性能电流动态解耦控制。通过实验对比本文方法与传统方法,证明了本文方法在弱磁区能够获得更佳的电流控制效果,增大了输出力矩。
Current assignment and decoupling-control are both presented in order to implement field-weakening control for induction motors. To maximize torque, a current assignment method independence from motor parameters is proposed in accordance with relationships amongst current, voltage and torque in full frequency range. For overcoming the influence of coupled-voltage on current control in field-weakening region, a current vector controller is designed without information of motor parameters. Consequently, high performance current dynamic decoupling-control is carried out. Experimental results demonstrate that both current control performance and output torque are improved compared with conventional method.
出处
《电工技术学报》
EI
CSCD
北大核心
2010年第7期61-66,共6页
Transactions of China Electrotechnical Society
关键词
感应电动机
弱磁控制
电流分配
电流解耦控制
Induction motors
field-weakening control
current assignment
current decouplingcontrol
