直接转矩控制中电压矢量对电磁转矩的影响

Impact of Voltage Space Vector on Torque in DTC

本文分析了直接转矩控制中电压矢量对电磁转矩的影响,提出了当定子磁链幅值和磁通角(定、转子磁链夹角 )变化发生矛盾时,磁通角变化决定转矩变化的传统观点是在一定前提条件下成立的,否则,在某些情况下,转矩的变化与磁通角变化恰恰相反,这导致控制实际效果与开关表设定相反,增大转矩脉动。

In this paper the impact of voltage space vector on torque in Direct Torque Control (DTC) is studied, and the conclusion is given that when the changes of the magnitude of the stator flux and the flux angle (angle between the stator and the rotor flux) are contrary, the traditional viewpoint that impact on the torque is determined by the magnitude of the flux angle has precondition. Or else the change of torque is contrary to the change of the flux angle in some instances, which can lead to the real control result being opposite to the switching table and increase of torque ripple.