一种异步电机直接转矩控制技术的转矩脉动最小化方案

A Torque Ripple Minimization Scheme in Direct Torque Control of Induction Motors

传统直接转矩控制的缺点之一是输出转矩脉动较大。将占空比控制技术用于直接转矩控制系统中可以有效地减小转矩脉动。本文提出了一种使用PI控制器的占空比控制技术。所设计的PI控制器输入是实际转矩值与参考转矩值,输出是电压矢量的占空比值。仿真结果表明,所提出的方案能够极大地减小转矩脉动,同时整个算法简单,并容易实现。

One of the disadvantages of conventional direct torque control （DTC） is high torque ripple. Applying duty ratio control technology can effectively reduce the torque ripple. In this paper, a new duty ratio control technology using PI controller is presented. The proposed PI controller has two inputs： actual torque value and reference torque value. Its output is the duty ratio of a voltage vector. Simulation results show that a great reduction of torque ripple is achieved, and the algorithm is simple and easy to implement.