永磁同步伺服电动机的动态参数

动态参数是影响伺服电动机动态性能最主要的因素之一.动态参数的高低直接决定伺服电动机动态及稳态性能的好坏.对传统的伺服电动机而言,几个主要的动态参数都有较清晰的定义和概念,长期以来在工程实践中广泛使用.但对正弦波驱动的永磁伺服电动机来说,电机的力矩常数Kt、反电势常数Ke、电气时间常数τe、机械时间常数τm和阻尼因数D等都有了新的变化,实践中常引起误解和混淆.文中主要分析永磁同步伺服电动机几个动态参数的含义以及和传统参数之间的差异,并从控制系统的要求出发,对几个最基本的动态参数和参数之间的相互关系进行分析,得出了一些实用的结论.

Dynamic Parameter Analysis of PM Synchronous Servo Motor

The dynamic parameter is one of the main factors of influencing dynamic performance of servo motor. The level of the dynamic parameter determines the trends and steady state performance of servo motor directly. To traditional servo motor,several main dynamic parameters all have clearer definition and coneept.extensive applied in project practiee for a lotime. But for permanent magnet servo motor driving with sinusoidal wave,the weveral daily parameters all have new changes,often cause misunderstand and obscure in practice. Mainly analyzing several dynamic parameter meaning and difference with traditional parameter from requirement of the control system of permanent magnet synchronous servo motor, also analyze interreaetion between several most basic dynamic parameters,have drawn some practical conclusions.