SOGI级联SFNF的高频注入无传感器电机控制方法  

High frequency injection sensor-less motor control method with cascade of SOGI and SFNF

作　　者：李东昇 袁杰 王坤东[1] LI Dongsheng;YUAN Jie;WANG Kundong(School of Electronic Information and Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学电子信息与电气工程学院,上海200240

出　　处：《电机与控制学报》2024年第3期24-32,共9页Electric Machines and Control

基　　金：国家重点研发计划(2021YFB3203104)。

摘　　要：针对传统脉振高频电压注入法同时应用带通滤波器和低通滤波器导致相位偏移和位置估计误差大的问题,提出一种级联二阶广义积分器(SOGI)和单频陷波器(SFNF)的改进方法,实现位置误差信号的精确和实时提取。研究了脉振高频电压注入法位置观测闭环传递函数的幅频特性,利用SOGI的选频特性提取高频交轴响应电流,并利用SFNF的陷波特性滤除注入信号二次谐波,替代了传统误差信号提取环节中的带通滤波器和低通滤波器,参数整定简便,具备兼顾滤波精度和带宽的优势。搭建实验平台对传统误差信号提取策略和所提SOGI级联SFNF策略进行对比,实验结果表明,本文所提改进方法的响应速度和位置估计精度相比传统方法均有提高:在转速突变过程中转速估计误差降低5.9 r/min,转子位置误差降低0.11 rad;在突加负载时,转速估计误差降低3 r/min,转子位置误差降低0.08 rad,响应调节时间缩短42%,有效提高了位置观测精度和系统的动态响应性能。In order to solve the problem of phase deviation and position estimation error caused by the simultaneous application of band-pass filter and low-pass filter in traditional high frequency pulsating voltage injection,an improved strategy of cascaded second order generalized integrator(SOGI)and single frequency notch filter(SFNF)was proposed for accurate and real-time extraction of position error signals.The amplitude-frequency characteristics of the position observation closed-loop transfer function were studied.The frequency selection characteristic of SOGI was used to extract the high-frequency cross-axis response current,and the second harmonic of the injected signal was filtered by the notch wave property of SFNF,which replaces the bandpass filter and low pass filter.It has the advantages of both filtering accuracy and bandwidth.An experimental platform was built to compare the traditional error signal extraction strategy with the proposed strategy.The experimental results show that the speed estimation error is reduced by 5.9 r/min and the position error is reduced by 0.11 rad under speed step condition.The speed estimation error is reduced by 3 r/min and the position error is reduced by 0.08 rad when load is suddenly applied,and the response time is shortened by 42%,which effectively improves the position observation accuracy and the dynamic response performance of the system.

关 键 词：高频注入法 无刷直流电机 无传感器控制 矢量控制 二阶广义积分器 陷波器 

分 类 号：TM351[电气工程—电机]