基于q轴磁链的机车牵引电机转子磁场校正技术

Rotor Flux Orientation Real-time Correction for Locomotive Traction Motor Based on q-Axis Flux

为提高整个机车交流传动系统的稳态和动态性能,利用牵引电动机间接磁场定向控制技术实现转矩和励磁解耦独立控制的磁场准确定向技术,对"和谐"型电力机车牵引电动机矢量控制过程中的磁场定向方式进行了演绎,以观测转子q轴磁链为模型,分析了转子磁链大小、位置,并利用MRAS理论通过自适应调节实现转子磁场定向实时校正。在实际应用中证明了理论分析的正确性和磁场准确定向校正策略的有效性。

To improve locomotive AC drive system static and dynamic perlbrmance, and achieve accurate flux orientation with indirect field oriented control technology implementing independent and decoupling control of torque and excitation, flux accurate orie^ltation of vector control for Harmonic Locomotive traction motor was deducted. By using rotor q-axis flux observer model, rotor flux magnitude and position was analyzed, and with MRAS theory, rotor magnetic field oriented real-time correction through the adaptive adjustment was realized. Experimental results verified that the theoretical analysis was correct and the correction strategy for accurate field orientation was effective.