基于定子磁场定向的感应电机无速度传感器控制研究  

Research of Speed Sensorless IM System Based on Stator Flux Orientation

作　　者：张浩[1] 戴先中[1] 

机构地区：[1]东南大学复杂系统测量与控制教育部重点实验室,江苏南京210096

出　　处：《电气传动》2010年第3期20-22,77,共4页Electric Drive

基　　金：国家自然科学基金项目(60574097)

摘　　要：针对定子磁链U-I观测模型在电机低速运行时失效的问题,在感应电机定子磁场定向控制基础上,用一种阈值可变的改进型积分器算法进行定子磁链观测,并对转速进行估算,构成无速度传感器的速度闭环控制。在自行设计构建的dSPACE试验平台上,对所提方案进行了低速空载及负载条件下的实验研究。实验结果表明转速估算值与实际值相一致,系统具有优良的动、静态控制效果。Aiming at the problem of a conventional U -I model at low speed running, a new improved integrator algorithm with alterable threshold for stator flux observer based on the stator flux-oriented control of induction motor was investigated. In addition, a method to estimate exactly speed and form sensorless speed closed-loop control was proposed. The proposed method was verified by experiment at low speed with no and full load on a dSPACE test platform. The experimental results show the estimated speed is true of exactly speed, and good behavior of the drive in both transient and steady state operating conditions.

关 键 词：无速度传感器 定子磁场定向 感应电机 

分 类 号：TM346[电气工程—电机]