摘要
针对异步电机转子磁场定向RFO矢量控制系统对转子侧参数的过度依赖问题,提出了一种基于定子磁场定向SFO的无速度传感器矢量控制算法。该算法采用转差频率ωs经PI调节器直接控制定子电流的转矩分量isq,通过一种具有饱和限幅的改进积分器观测定子磁链ψs,运用模型参考自适应MRAS估计电机转速,实现对电机的双闭环控制。通过Matlab/Simulink对该控制算法进行大中小容量电机的低速空载及负载条件下的实验研究。实验结果表明该算法在参数整定合适的前提下适用于各种容量的交流电机,转速的估计值与实测值一致,系统具有良好的静动态性能。
This paper presents a speed sensorless vector control algorithm based on the stator flux orientation SFO , which aims at eliminating the excessive dependence of the rotor field oriented RFOvector control system＇ s rotor parameters about AC induction motors. The algorithm uses the slip frequency to, to directly control the torque component of the stator current i,q through PI regulator, observes the stator flux ψ, by a kind of saturation limiter improved integrator and evaluates the rotor speed by means of model reference adaptive MRASto achieve double-loop control of the motor. This paper carries out experiments under the conditions of low-speed, no load and load on large, medium and small capacity motor. Results show that the proposed control algorithm is suitable for a variety of capacity AC motor and the estimated rotor speed is consistent with the measured value, the system has good static and dynamic performance.
出处
《组合机床与自动化加工技术》
北大核心
2014年第5期100-102,106,共4页
Modular Machine Tool & Automatic Manufacturing Technique
