摘要
为提高直接转矩控制系统在电压电流模型磁链观测器中的磁链观测精度以及动态性能,针对传统一阶低通滤波器造成的初始相位直流偏移问题以及幅值偏移和相位畸变,提出一种新型的磁链观测器算法。对低通滤波器后的输出采用高通滤波器解决直流误差问题,同时对滤波器造成的幅值和相位误差进行实时补偿,以提高磁链观测的精度,在此基础上,通过将补偿函数提前改善磁链观测器的动态性能,特别是低速时的动态性能。为进一步验证新型磁链观测器的有效性,建立了异步电机直接转矩控制系统仿真实验平台,大量的仿真和实验结果论证了新型磁链观测器的有效性。
In order to improve the precision and dynamic performance of the DTC system stator flux observer in voltage and current model, in view of the initial phase DC offset and amplitude and phase errors for traditional low-pass-filter（ LPF）, this paper presented a new stator flux estimation method. Removing the initial phase DC Offset by high-pass-filter（HPF） based on the LPF , for improving the precision, compen- sating the amplitude and phase error. By exchanging the compensation function to improving the dynamic performance, especially the low speed performance. In order to verify the effectiveness of new algorithm, an induction motor DTC system was built, lots of simulation and experimental results demonstrate that the new algorithm is effective.
出处
《微电机》
2015年第6期65-68,共4页
Micromotors
关键词
直接转矩
定子磁链观测器
动态性能
direct torque control
stator flux estimation
dynamic performance
