基于预测电压空间矢量的永磁同步电动机直接转矩控制

Direct Torque Control of Permanent Magnet Synchronous Machine Based on Predictive Voltage Space Vector

为了减小直接转矩控制永磁同步电动机的转矩脉动,以永磁同步电动机的数学模型为基础,分析了基于预测电压空间矢量的永磁同步电动机直接转矩控制的原理并推导了在该直接转矩控制下的数学方程,利用Matlab对传统滞环控制的直接转矩控制和基于预测电压空间矢量的直接转矩控制进行了对比仿真研究。结果表明,文章推导的预测电压控制方法能在降低开关频率的前提下,可以改善电流波动和转矩脉动。最后通过实验验证了所提方法在减小电流波动方面具有较好效果。

In this paper, direct torque control based on the predicted voltage space vector of permanent magnet synchronous motor is analyzed and derived according to the mathematical model of the permanent magnet synchronous motor. Direct torque control using traditional hysteresis control and direct torque control based on the predicted voltage vector have been studied contrastively through simulation. The results show that the current fluctuation and torque ripple has been greatly improved using the deduced method. Finally, it is verified that the proposed method can reduce the current fluctuation on the experimental platform.