摘要
针对游标电机的无位置控制,本文通过对磁场进行分析,指出游标电机经过调制作用产生多个工作次谐波,需根据合成反电势,采用矢量控制。同时,由于游标电机转子为多极对数的结构,使其在运行时,对于位置信号的准确性要求更为严苛,较小的位置信号误差便会引起较大的控制角度的差距,如何保证游标电机在无位置传感器控制时的观测精度,对其运行性能起着至关重要的作用。本文以一台外转子分裂齿游标电机为对象,分析其运行原理,建立基于合成反电势的数学模型,并采用基于改进超螺旋滑模观测器的无位置控制策略,保证了游标电机无传感器控制的稳态及动态性能。
For the position sensorless control of a vernier motor,this article analyzed the magnetic field and points out that the vernier motor generates multiple working harmonics through modulation,which required vector control based on the synthesized back EMF.Meanwhile,due to the multipole structure of the rotor,the accuracy requirements for position signals are more stringent during operation.Small position signal errors can cause significant control angle differences.How to ensure the observation accuracy of the vernier motor in sensorless control plays a crucial role in its operational performance.This article took an external rotor split tooth vernier motor as the object,analyzed its operating principle,established a mathematical model based on synthetic back EMF,and adopted a position free control strategy based on an improved super-twisiting sliding mode observer to ensure the steady-state and dynamic performance of the sensorless control of the vernier motor.
作者
熊凯
章玮
XIONG Kai;ZHANG Wei(College of Electrical Engineering,Zhejiang University,Hangzhou 310007,China)
出处
《微电机》
2024年第2期18-24,40,共8页
Micromotors
基金
浙江省自然科学基金(LY19E070005)。
