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Backstepping direct torque control of permanent magnet synchronous motor with RLS parameter identification

机译：基于RLS参数辨识的永磁同步电动机的反步直接转矩控制

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Direct torque control (DTC) system of permanent magnet synchronous motor (PMSM) has large torque ripples and inconstant switching frequency, especially at low speed. An improved DTC method of PMSM based on backstepping control with recursive least squares (RLS) parameter identification is proposed in this paper. In this method backstepping controller is designed using PMSM mathematical models and space vector modulation (SVM) produces switching signals of inverter. In order to eliminate the effect of PMSM parameters variations on the control system, PMSM parameters are identified using RLS and are used in the backstepping controller. Simulation results show that compared to the traditional DTC, the proposed DTC based on backstepping control with RLS parameter identification could effectively decrease flux and torque ripples, and make inverters have constant switching frequency and RLS could accurately identify PMSM parameters.
机译：永磁同步电动机（PMSM）的直接转矩控制（DTC）系统具有较大的转矩脉动和不稳定的开关频率，尤其是在低速情况下。提出了一种基于递推最小二乘（RLS）参数辨识的反步控制的PMSM DTC改进方法。该方法采用PMSM数学模型设计反推控制器，空间矢量调制（SVM）产生逆变器的开关信号。为了消除PMSM参数变化对控制系统的影响，使用RLS识别PMSM参数，并将其用于反推控制器中。仿真结果表明，与传统的故障诊断代码相比，所提出的基于反向步距控制的故障诊断代码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，并且RLS可以准确地识别PMSM参数。

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