电工技术学报2019，Vol.34Issue(2)：236-244,9.DOI:10.19595/j.cnki.1000-6753.tces.171527
一种低载波比下内埋式永磁同步电机离散龙贝格观测器
Discrete-Time Luenberger Observer for Interior Permanent Magnet Synchronous Motor with Low-Frequency-Ratio
摘要
Abstract
This paper proposes a design method of discrete-time Luenberger observer in the stationary coordinate system for position sensorless control of interior permanent magnet synchronous motor (IPMSM) drives.This method achieves a low pulse width modulation (PWM) to operating fundamental frequency ratio.Based on extended back-EMF in the stationary coordinate system, a discrete-time complex vector IPMSM model is established to describe the exact mathematical relationship between the applied voltage and the measured current.Consequently, combined with the dynamic characteristics of the back-EMF, a full-order Luenberger observer is constructed.Aiming to the problem that the observer contains pole point in the imaginary axis, a linear trajectory method in discrete domain is used for the design of feedback gain matrix.This method can guarantee the stability of the observer and allow fast convergence.The proposed discrete-time Luenberger observer was verified on the 14 kW IPMSM drive platform, and the experimental results demonstrated the feasibility and effectiveness of this observer in low-frequency-ratio.关键词
内埋式永磁同步电机/无位置控制/低载波比/龙贝格观测器/极点配置Key words
Interior permanent magnet synchronous motor (IPMSM)/sensorless control/low ratios of fundamental-to-switch frequency/Luenberger observer/pole assignment分类
信息技术与安全科学引用本文复制引用
苑国锋,牛泽农,郑春雨,李正熙..一种低载波比下内埋式永磁同步电机离散龙贝格观测器[J].电工技术学报,2019,34(2):236-244,9.基金项目
北方工业大学科研启动基金项目资助 （）
