A Simple Method to Reduce Torque Ripple in Direct Torque-Controlled Permanent-Magnet Synchronous Motor by Using Vectors With Variable Amplitude and Angle
A Simple Method to Reduce Torque Ripple in Direct Torque-Controlled Permanent-Magnet Synchronous Motor by Using Vectors With Variable Amplitude and Angle
复制标题
DOI：
10.1109/tie.2010.2076413
复制
发表时间：
2011-07
影响因子：
7.7
通讯作者：
Yongchang Zhang;Jianguo Zhu;Wei Xu;Youguang Guo
中科院分区：
文献类型：
--
作者：
Yongchang Zhang;Jianguo Zhu;Wei Xu;Youguang Guo
在本文中，一种改进的直接转矩控制（DTC）的永磁同步电机，它使重要的转矩和磁链脉动减少通过使用电压矢量具有可变的幅度和角度，提出了。在提出的直接转矩控制中，转矩和磁链误差的幅值被微分，并用于在线调节输出电压矢量的幅值和角度，最后通过空间矢量调制（SVM）合成。推导了两个简单的公式，仅从转矩和磁链的误差中推导出指令电压矢量的幅值和角度。该方法取消了传统的开关表和滞环控制器，利用支持向量机获得固定的开关频率。定子磁链的估计是从一个改进的电压模型，这是基于一个低通滤波器的幅值和相位补偿。从理论分析、计算机仿真和实验验证三个方面对所提出的直接转矩控制算法与现有的支持向量机直接转矩控制算法进行了比较研究。仿真和实验结果表明，所提出的直接转矩控制方法简单，具有良好的稳态响应和快速的动态性能，对外界干扰和控制参数变化具有较强的鲁棒性。
In this paper, a modified direct torque control (DTC) for permanent-magnet synchronous machines, which enables important torque- and flux-ripple reduction by using voltage vectors with variable amplitude and angle, is proposed. In the proposed DTC, the amplitudes of torque and flux errors are differentiated and employed to regulate the amplitude and angle of the output voltage vectors online, which are finally synthesized by space-vector modulation (SVM). Two simple formulas are developed to derive the amplitude and angle of the commanding voltage vectors from the errors of torque and flux only. The conventional switching table and hysteresis controllers are eliminated, and a fixed switching frequency is obtained with the help of SVM. Stator flux is estimated from an improved voltage model, which is based on a low-pass filter with compensations of the amplitude and phase. The proposed DTC is comparatively investigated with the existing SVM-DTC from the aspects of theory analysis, computer simulation, and experimental validation. The simulation and experimental results prove that the proposed DTC is very simple and provides excellent steady-state response, quick dynamic performance, and strong robustness against external disturbance and control-parameter variations.