摘要
由于永磁同步电机在低速运行时,电机反电动势较小,因此采样通道的非线性导致的采样电压和电流中包含的直流偏置对电机反电动势观测的影响更为严重。针对这个问题,提出了一种基于超螺旋滑模观测器的永磁同步电机无速度传感器控制方法。首先,基于等效反馈的概念,设计了一种新的超螺旋滑模观测器,以提高低速时的无速度传感器控制精度;其次,详细分析了直流偏置对无速度传感器控制的影响,并且设计了一种基于二阶广义积分器的直流偏置抑制方法,从而进一步提高了无速度传感器控制精度;最后,通过6.6 kW永磁同步电机无速度传感器控制系统验证了所提控制策略的有效性。
As the back electromotive force of permanent magnet synchronous motor is small at low speed,the influence of the DC bias contained in the sampled voltage and current caused by the nonlinearity of sampling channel is more serious. To solve the problems,a super-twisting sliding mode observer based speed-sensorless control method is proposed for permanent magnet synchronous motors. Firstly,based on the concept of the equivalent feedback,a new super-twisting sliding mode observer is designed to improve the speed-sensorless control accuracy at low speed region. Secondly,the effects of the DC offset on the speedsensorless control are analyzed in detail,and a second-order generalized integrator based DC offset elimination method is designed to further improve the speed-sensorless control accuracy. Finally,the effectiveness of the proposed control strategy is verified by a 6.6 kW permanent magnet synchronous motor speed-sensorless control system.
作者
郭磊磊
王华清
代林旺
曹玲芝
章凯旋
罗魁
GUO Leilei;WANG Huaqing;DAI Linwang;CAO Lingzhi;ZHANG Kaixuan;LUO Kui(School of Electrical and Information Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China;State Key Laboratory of Operation and Control of Renewable Energy&Storage Systems,China Electric Power Research Institute Co.,Ltd.,Beijing 100192,China)
出处
《电力自动化设备》
EI
CSCD
北大核心
2020年第2期21-27,34,共8页
Electric Power Automation Equipment
基金
国家自然科学基金资助项目(51707176)
新能源与储能运行控制国家重点实验室(中国电力科学研究院有限公司)开放基金资助项目
河南省高等学校重点科研项目(18A470020)~~
关键词
永磁同步电机
等效反馈
无速度传感器
超螺旋滑模观测器
二阶广义积分器
permanent magnet synchronous motor
equivalent feedback
speed-sensorless
super-twisting sliding mode observer
second-order general integrator
