两种直接转矩控制速度辨识方案的比较

Comparison between two kinds of speed estimation of direct torque control

在高性能的异步电动机直接转矩控制系统中,转速的闭环控制环节是必不可少的.以电机为模型,构造了两种模型参考自适应辨识转速的方案,得出了两种不同的自适应率,从原理的角度加以比较分析.并将其应用到直接转矩控制系统中,用Matlab软件对这两种方案仿真.仿真结果表明,用反电动势构造的速度辨识方案提高了辨识的速度,大大减小了转矩的波动.

This paper presents two kinds of model reference adaptive schemes based on motor model. Two kinds of different daptive laws are obtained, and the two methods were compared and analyzed in theory . The two methods are applied to direct torque control system and examined by Matlab. Simulation results indicated that the adaptive method with reverse emf quicken the speed estimation and reduce the torque tipple.