电励磁同步电动机磁链观测模型

Flux Estimated Model of Electrical Excitation Synchronous Motor

在对电励磁同步电动机磁链的观测时,电流模型易受电动机参数变化的影响,并且为开环控制,观测不准确;传统电压模型存在直流偏置和积分误差,新电压模型解决了上述两个问题,但低速启动时,定子电阻压降影响较大。针对上述问题,结合电流模型与新电压模型各自的优点,通过仿真分析,得到了适合全程观测的综合磁链模型。使低速时的电流模型和高速时的新电压模型能平稳过渡,从而提高了整个运行范围内磁链观测的准确度。

To observe the flux of the electrical excitation synchronous motor,current model is vulnerable to the impact of motor parameter changes and is an open-loop control,the flux can not be estimated accurately.The DC offset and the integrated error is inevitable in traditional voltage model,these two problems were solved by the new voltage model,but the flux cannot be estimated accurately because of the stator resistance voltage drop at a low speed.A new composite model which is suitable for full time estimated through simulation according to the questions above was presented,and combined with current model and new voltage model for their respective advantages.The model of current at the low speed and the model of voltage at high speed can transit smoothly,thereby increasing the accuracy of flux estimation in the entire operating range.