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Speed-sensorless sliding-mode direct torque control of induction motors

机译：感应电动机的无速度传感器滑模直接转矩控制

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摘要

An adaptive sliding mode flux observer is presented for speed sensorless sliding-mode direct torque control (SM-DTC) drive of induction motors. The observer detects the rotor flux components in the two-phase stationary reference frame by the motor electrical equations. An adaptive speed estimation is derived from the Lyapunov stability theory. The SM-DTC is established by two sliding surfaces for the torque and the flux, in which the principles of SM control and DTC are combined to ensure high-performance operation, both in the steady state and under transient conditions. Merits of the classic DTC transient behaviour are preserved, while the steady-state operation is significantly improved. Experimental results presented demonstrate the robustness, accuracy, quickness, and low chattering of the drive. Standstill and low speed sensorless operations is demonstrated.
机译：提出了一种自适应滑模磁通观测器，用于感应电动机的无速度滑模直接转矩控制（SM-DTC）驱动。观察者通过电动机电方程检测两相固定参考系中的转子磁通分量。自适应速度估计是从Lyapunov稳定性理论得出的。 SM-DTC由用于扭矩和磁通的两个滑动表面建立，其中将SM控制和DTC的原理结合在一起，以确保在稳态和瞬态条件下均能实现高性能的运行。经典DTC瞬态行为的优点得以保留，而稳态操作得到了显着改善。给出的实验结果证明了该驱动器的鲁棒性，准确性，快速性和低抖动性。演示了静止和低速无传感器操作。

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