摘要
针对牵引电机低速运行下磁场定向控制系统中磁链精度较低的问题,对现有磁链观测模型的优化进行了研究。首先在基于低通-高通滤波的电压磁链观测模型基础上加入误差补偿环节,并提出了先补偿后滤波新型结构的改进型电压模型,解决了观测磁链在直流偏置、幅值和相位的误差问题;为进一步提升模型的动态响应性能和磁链观测精度,通过串入电流模型,并通过中间环节PI控制器形成了基于电压电流混合控制的磁链观测优化模型;最后通过仿真建模分析,验证了所提优化模型在抑制直流偏置误差以及提升动态响应与磁链精度方面的有效性,并通过在电机矢量控制系统中的仿真应用,进一步验证了该模型在牵引电机低速运行时不同工况切换下优良的稳态和动态响应性能。
To address the problem of the low flux precision in flux orientation control system when the traction motor operates in low speed,this paper＇s research focus on optimization model of existing flux observation. First,to compensate the DC offset,amplitude and phase error of voltage model flux observer which series high-pass filter and low-pass filter,this paper proposes an improved voltage model which put the compensation function in front of filter when the compensation function is introduced. For the improvementof the precision and dynamic performance of the model,an optimization model of flux observation based on mixture control of voltage and current modelis proposed,this model consist of improved voltage model and basic current model linked by PI controller. The simulink result of the optimization model verify its advantage in the settlement of DC offset error,dynamic performance and flux accuracy,and the application of the optimization model in the motor vector control system also verify its excellent steady-state and dynamic response performance when the traction motor switch modes in low speed operation.
出处
《机电一体化》
2016年第12期13-17,23,共6页
Mechatronics
关键词
电机低速运行
磁链观测
磁链精度
幅相误差补偿
动态响应
low speed operation of traction motor
flux observer
flux accuracy
compensation of amplitude and phase error
dynamic response
