传感器与微系统
傳感器與微繫統
전감기여미계통
TRANSDUCER AND MICROSYSTEM TECHNOLOGY
2015年
6期
61-63
,共3页
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
異步電機%直接轉矩控製%無電壓傳感器%模型參攷自適應繫統
이보전궤%직접전구공제%무전압전감기%모형삼고자괄응계통
induction motor%direct torque control(DTC)%voltage sensorless%model reference adaptive system (MRAS)
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。
為提高繫統的抗榦擾能力,降低運行成本,提齣無電壓傳感器控製策略,通過逆變器的導通狀態和直流側電壓估算三相定子電壓,採用模型參攷自適應繫統( MRAS)方法設計速度觀測器,基于異步電機數學模型得到轉子磁鏈的兩種模型,根據閤適的自適應機構得到精確的實際轉速,實時調節模型參數,該控製方法簡單,保持較高的控製精度。最後通過實驗驗證瞭控製策略的可行性。
위제고계통적항간우능력,강저운행성본,제출무전압전감기공제책략,통과역변기적도통상태화직류측전압고산삼상정자전압,채용모형삼고자괄응계통( MRAS)방법설계속도관측기,기우이보전궤수학모형득도전자자련적량충모형,근거합괄적자괄응궤구득도정학적실제전속,실시조절모형삼수,해공제방법간단,보지교고적공제정도。최후통과실험험증료공제책략적가행성。
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.