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Research on sensorless DTC of PMSM based on non-singular terminal-sliding-mode observer

机译:基于非奇异终端滑模观测器的永磁同步电机无传感器故障码研究

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A non-singular terminal-sliding-mode (NTSM) observer which contains a high-order sliding mode is introduced into a direct torque control (DTC) system of permanent magnet synchronous motor (PMSM). The proposed system uses the non-singular terminal-sliding-mode observer to obtain the back electromotive force which is used to estimate the rotor position and speed of PMSM for sensorless DTC system. Compared with the conventional sliding mode observer, NTSM observer without the low-pass filter can avoid the problem of speed estimation lag and phase lag, and contains the integral element, decreases ripple, reduces static errors. The numerous simulation results proved that the proposed algorithm improves the speed estimation precision and dynamic performance of system.
机译:包含高阶滑模的非奇异终端滑模(NTSM)观察器被引入永磁同步电动机(PMSM)的直接转矩控制(DTC)系统中。所提出的系统使用非奇异的终端滑模观察器来获得反电动势,该反电动势用于估计无传感器DTC系统的转子位置和PMSM的速度。与传统的滑模观测器相比,不带低通滤波器的NTSM观测器可以避免速度估计滞后和相位滞后的问题,并且包含积分元素,减少了纹波,减少了静态误差。大量的仿真结果证明,该算法提高了系统的速度估计精度和动态性能。

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