基于变磁链幅值的同步磁阻电动机直接转矩控制

Direct torque control of synchronous reluctance motor based on variable magnetic chain amplitude

传统的直接转矩控制,在保持定子磁链幅值恒定的前提下,通过改变定子磁链相位来调节转矩。对于同步磁阻电动机直接转矩控制方案功率因数较低的问题,本文提出变磁链幅值的同步磁阻电动机空间矢量直接转矩控制(SVM-DTC)方案,通过改变定子磁链幅值,调整功率角大小,从而改善功率因数,克服了直接转矩控制功率因数低的缺点。利用Matlab/Simulink搭建了同步磁阻电动机SVM-DTC模型,验证恒定磁链幅值和变磁链幅值两种直接转矩控制方案。研究结果表明,相较于传统的SVM-DTC,该方案能明显改善功率因数。

The traditional direct torque control, under the premise of keeping the stator flux amplitude constant, changes the stator flux phase to adjust the torque. For the synchronous reluctance motor direct torque control scheme and the low power factor, this paper proposes a synchronous magnetic reluctance motor space space vector direct torque control (SVM-DTC) scheme with variable flux linkage amplitude, by changing the flux linkage amplitude. The power angle is adjusted to improve the power factor, and the shortcoming of the direct torque control power factor is overcome. The SVM-DTC model of synchronous reluctance motor was built by Matlab/Simulink, and two direct torque control schemes of constant flux amplitude and variable flux amplitude were verified. The results show that this scheme can significantly improve the power factor compared to the traditional SVM-DTC.