摘要
提出了一种基于改进PLL的PMSM无传感器控制方法,解决了传统控制方法在动态工况下的局限性。该方法改进了滑模观测器的滤波部分,采用适应转速的二阶广义积分器(SOGI)结构结合单频陷波器(SFNF)进行滤波,解决了传统滑模观测器因抖振产生相移误差的问题并且消除系统中高次谐波的影响,同时在角度解析时,在传统正交锁相环基础上增加补偿回路,克服了传统二阶锁相环对于电机加减速工况下频率斜升信号容易失锁的缺点。并且,在锁相环鉴相器(PD)环节引入了符号函数来构造误差信号,解决了误差信号受电机正反转工况影响从而导致角度误差过大的问题。最后应用MATLAB/Simulink,搭建仿真模型,验证所提方法在电机变速工况和正反转切换工况下准确跟踪角度的可行性。
A sensorless control method for PMSM based on improved PLL is proposed,which solves the limitations of traditional control methods in dynamic working conditions.This method improves the filtering part of the sliding mode observer by using a second-order generalized integrator(SOGI)structure adapted to the speed combined with a single frequency notch filter(SFNF)for filtering,which solves the problem of phase shift error caused by chattering in traditional sliding mode observers and eliminates the influence of high-order harmonics in the system.At the same time,in angle analysis,a compensation loop is added on the basis of the traditional orthogonal phase-locked loop,overcoming the disadvantage of the traditional second-order phase-locked loop that is prone to losing lock of the frequency ramp up signal under motor acceleration and deceleration conditions.Moreover,a sign function is introduced in the phase-locked loop phase detector(PD)stage to construct the error signal,which solves the problem of excessive angle error caused by the influence of motor forward and reverse operating conditions on the error signal.Finally,MATLAB/Simulink was applied to build a simulation model and verify the feasibility of the proposed method in accurately tracking angles under motor variable speed and forward/reverse switching conditions.
作者
张传圳
魏海峰
张懿
ZHANG Chuanzhen;WEI Haifeng;ZHANG Yi(School of Automation,Jiangsu University of Science and Technology,Zhenjiang 212000,China)
出处
《组合机床与自动化加工技术》
北大核心
2025年第8期116-120,共5页
Modular Machine Tool & Automatic Manufacturing Technique
基金
国家自然基金科学基金项目(51977101)
镇江市产业前瞻性与共性关键技术重点研发项目(GY2023003)。
