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Speed Sensorless Direct Toque Control of Interior Permanent Magnet Synchronous Motor Drive Based on Space Vector Modulation

机译:基于空间矢量调制的永磁同步电机无速度传感器直接转矩控制。

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To solve the problems of large flux and torque ripples and inconstant switching frequency in direct torque control (DTC) for permanent magnet synchronous motors (PMSM) and to eliminate speed sensor since it deteriorates system reliability and increases the cost of system, a novel speed sensorless DTC method based on space vector modulation (SVM) is proposed in this paper. This method is based on the PMSM models in the coordinate of stator flux linkage, flux and torque are controlled through stator voltage components in stator flux linkage coordinate axes and space vector modulation is used to control inverters. The instantaneous stator flux angle and load angle are calculated to estimate the motor speed. Simulation and experiment results verify that this proposed sensorless DTC scheme could effectively decrease flux and torque ripples, make inverters have constant switching frequency and the speed estimation method could accurately track the motor speed and has good dynamic and static performance.
机译:为了解决永磁同步电动机(PMSM)的直接转矩控制(DTC)中磁通和转矩脉动大以及开关频率不稳定的问题,并消除速度传感器,因为它会降低系统可靠性并增加系统成本,因此,一种新型的无速度传感器提出了一种基于空间矢量调制(SVM)的DTC方法。该方法基于PMSM模型中的定子磁链的坐标,通过定子磁链的坐标轴中的定子电压分量控制磁链和转矩,并使用空间矢量调制来控制逆变器。计算瞬时定子磁通角和负载角以估计电动机速度。仿真和实验结果证明,该无传感器故障诊断代码方案可以有效地减小磁通和转矩脉动,使变频器具有恒定的开关频率,速度估计方法可以准确地跟踪电动机的转速,并具有良好的动态和静态性能。

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