摘要
传统的MRAS系统中的电压模型采用对反电动势直接积分得到转子磁链，由于直流偏差等误差会造成磁链估算不准，尤其在低速时严重影响系统精度。本文在详细分析误差各组成部分的基础上，提出一种改进型电压模型，通过高通滤波器对直流偏差等进行过滤，并通过补偿装置对相位误差进行补偿。利用simulink搭建仿真模型进行实验，证明该模型在全速范围内均可获得较好的效果。
The rotor flux linkage is the pure integral for back electromotive force （back-EMF） in the traditional voltage model of MRAS system. The flux linkage estimation is inaccurate because of error such as dc error. It seriously affects the system precision at low speeds. This paper analyzes the composition of the error, and proposes an improved voltage model. In the model, the high-pass filter dc offset and the compensation part compensate flux linkage error. The system is simulated in Simulink, and the result shows that the model has highly valid in full speed range.
出处
《湖南铁路科技职业技术学院学报》
2016年第1期43-46,共4页
Vocational Education Research on Rail Transit
