基于改进闭环磁链观测器的感应电机无速度矢量控制  

Speed Sensorless Vector Control with Improved Closed-Loop Flux Observer for Induction Machines

作　　者：陆文斌[1] 姚文熙[1] 吕征宇[1] 

机构地区：[1]浙江大学电力电子国家专业实验室,杭州310027

出　　处：《电工技术学报》2013年第3期148-153,共6页Transactions of China Electrotechnical Society

摘　　要：在无速度传感器感应电机矢量控制系统中,准确的磁链和转速信息至关重要。本文改进了基于电压、电流模型的闭环磁链观测器,在不需要转速的条件下可以准确观测转子磁链的幅值及角度,并且可以稳定运行在发电模式。在模型参考自适应系统(MRAS)理论基础上,以改进闭环磁链观测器为参考模型,电流模型为可调模型,实现了电机转速的估算。最后将改进的磁链观测器用于转子磁场定向矢量控制系统中,并在DSP实验平台上验证了方案的可行性。In the speed sensorless vector control system of induction machine, accurate flux and speed information is very important. In this paper, the closed-loop flux observer which combines voltage model and current model is improved. It can obtain accurate magnitude and angle of the rotor flux and it can run in generating mode without speed information. On the basis of model reference adaptive system（MRAS） theory, it realizes the estimation of motor speed with the improved closed-loop flux observer as the reference model and current model as the adaptive model. Finally, the improved flux observer is used in a rotor field oriented vector control system and the feasibility of the proposed scheme is verified on the DSP experiment platform.

关 键 词：改进闭环磁链观测器 无速度传感器 发电模式 模型参考自适应系统 矢量控制 

分 类 号：TM343.3[电气工程—电机]