异步电动机调速系统的滑模直接转矩控制方法

A Sliding-Mode Direct Torque Control of Induction Motor Drives

在交流调速技术中,直接转矩控制技术的特点是具有快速的动态响应特性和很强的鲁棒性,这种控制方法存在的问题是在稳态运行时会出现转矩和磁链的脉动。为了降低转矩和磁链的脉动,本文基于滑模控制方法介绍了一种新的直接转矩控制方法,其特点是继承了直接转矩控制方法的优点,同时降低了稳态时转矩和磁链脉动,改善了调速系统的低速性能。最后对整个调速系统进行了实验研究,实验的结果表明了这种控制方法的有效性。

Direct Torque Control（DTC）is known to produce the rapid dynamic response and strength robust control in ac adjustable-speed drives, however, in the steady-state operation, notable torque and flux pulsation occur. In order to reduce pulsation, a novel direct torque and flux control strategy is proposed for induction motor drives. In the proposed drive system, the DTC＇s merits are preserved, The steady-state behavior is improved by reducing the torque and flux pulsations. In the proposed drive system,the low-speed performances are also be improved. Finally, The experiments have been carried out. Experimental results proved the validity of the control strategy.