采用MRAS速度观测器的异步电机无电压传感器DTC研究  

Research on voltage sensorless DTC for induction motor with MRAS speed observer

作　　者：李瀛[1] 胡立坤[1] 梁冰红[1] 

机构地区：[1]广西大学电气工程学院,广西南宁530004

出　　处：《传感器与微系统》2015年第6期61-63,共3页Transducer and Microsystem Technologies

基　　金：国家自然科学基金资助项目(51177018);南宁市科学研究与技术开发计划资助项目(20141049)

摘　　要：为提高系统的抗干扰能力,降低运行成本,提出无电压传感器控制策略,通过逆变器的导通状态和直流侧电压估算三相定子电压,采用模型参考自适应系统(MRAS)方法设计速度观测器,基于异步电机数学模型得到转子磁链的两种模型,根据合适的自适应机构得到精确的实际转速,实时调节模型参数,该控制方法简单,保持较高的控制精度。最后通过实验验证了控制策略的可行性。In order to improve capacity of resisting disturbance and reduce cost of operation control strategy of voltage sensorless is proposed. Three-phase stator voltages are estimated by conducting state of inverter and DC voltage,speed observer is designed by model reference adaptive system（ MRAS）. Based on mathematical model of asynchronous motor,two kinds of rotor flux observation models are obtained. According to the suitable adaptive institutions to get accurate actual rotating speed,adjust model parameters in real time. This control method is simple and has high control precision. Finally,experiments prove the feasibility of the control strategy.

关 键 词：异步电机 直接转矩控制 无电压传感器 模型参考自适应系统 

分 类 号：TM343[电气工程—电机]