基于扩张滑模-锁相环的感应电机无速度传感器矢量控制  

Senseless Vector Control Method for Induction Motor Based on Extended Sliding Mode and Phase Locked Loop

作　　者：赵琨 宋宝[1] 唐小琦[1] 周向东[1] ZHAO Kun;SONG Bao;TANG Xiaoqi;ZHOU Xiangdong(School of Mechanical Science and Engineer,Huazhong University of Science and Technology,Wuhan 430074,Hubei Province,China)

机构地区：[1]华中科技大学机械科学与工程学院,湖北省武汉市430074

出　　处：《中国电机工程学报》2024年第20期8270-8278,I0029,共10页PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING

基　　金：国家重点研发计划项目(2020YFB1711300);东莞市重点领域研发项目(20201200300082)。

摘　　要：在高性能感应电机无速度传感器矢量控制系统中,需要对转子磁链与转速进行准确的估计,而电动势项包含直流偏置,影响了转子磁链的准确估计。而且传统的正交锁相环方法在加减速工况下,转速估计难以收敛至实际值。该文针对这两个问题,首先,设计一种以定子电流与电动势为状态变量的Super-Twisting滑模观测器,结合可编程滤波器来估计转子磁链,以提升转子磁链估计精度;其次,提出一种基于扩张滑模锁相环的速度估计方法,提高加减速工况下的转速估计性能;最后,通过1.5 kW感应电机测试平台验证所提方法的有效性。In high-performance sensorless vector control systems for induction motors,accurate estimation of rotor flux and speed is required.However,the back emf which includes DC offset affects the accurate estimation of rotor flux.Moreover,speed estimation cannot converge to actual value by conventional quadrature phase-locked loop method under acceleration and deceleration.To solve these two problems,a super-twisting sliding mode observer is proposed to estimate emf.Then,an extended sliding mode phase-locked loop method is proposed to improve the speed estimation performance under acceleration conditions.Effectiveness of the proposed method is verified through a 1.5 kW induction motor testing platform.

关 键 词：感应电机 无速度传感器控制 扩张滑模观测器 锁相环 

分 类 号：TM346[电气工程—电机]