摘要
分析了磁链观测存在的问题,在定子磁链定向的同步坐标系下,分析了磁链观测的本质,提出了一种新颖的定子磁链观测方案。此方案以估计出的位置角为反馈量,采用闭环双积分结构,分别估计了定子磁链的幅值和相位。采用小信号的方法对其稳定性进行分析。分析结果表明这种结构本质上具有锁相环的功能。因此,它可以从根本上解决电压模型的初始值不准确和积分零漂的问题。仿真和试验结果证明,这方案精度高,对定子电阻变化和直流偏置不敏感,适用于同步电动机、异步电动机和磁阻电机。
The essence of flux observing is analyzed in synchronous frame align with stator flux, based on which a new observe scheme is presented. The amplitude and phase is estimated respectively through a double integrator close-loop, in stead of vector of flux, with angular and speed as feedback. The stability of the system is analyzed by small-signal, the results shows that the double integrator close-loop is a Phase-Locked-Loop （PLL） essentially. So drift and initial error are solved absolutely by the scheme. Simulations and experiments are carried; the result indicates that this scheme has the merit of steady, precision and robust to the stator resistance. And the scheme is so simple that can be achieved easily in spite of synchronous and asynchronous motor.
出处
《微电机》
北大核心
2006年第8期1-5,共5页
Micromotors
