五相感应电机直接转矩控制研究

在对五相感应电机直接转矩控制中空间电压矢量进行详细分析的基础上,给出了一套系统调速整体控制方案。在该控制系统中,磁链和转矩均是闭环控制,其值在一个微小的滞环内波动,稳态情况下,其指令值与实际值可认为相等。此时,定子电流空间矢量幅值是一定值,该值变化可认为是由定子电阻变化引起的,由此给出了一套简单、易于实施的定子电阻在线辨识算法。仿真结果表明,提出的控制方案在理论上和实际上是可行的。

Study on Direct Torque Control of Five-Phase Induction Motor

A whole direct torque control scheme is presented based on the analysis of space voltage vector on five - phase induction motor.In this system, stator flux and machine torque are both controlled in close - loop method and fluctuate in a minute hysteresis - band, so the command value can replace the actual in steady state. Then, the stator current magnitude is a constant, and is influencedby stator resistance parameter fluctuation. On this foundation, a stator resistance online estimation method is presented which has the characteristics of simple and easy to implement. A simulation experiment is carried out, it verifies that control scheme is right and practical.