摘要
提出了一种基于模型参数自适应系统(MRAS)的感应电机转子速度估算方法,用电机状态方程构成全阶观测器观测定子电流和转子磁链,利用李雅普诺夫第二法推导出转速估算公式,并在理论上证明了系统的全局渐近稳定性.分析了定子电阻和转子电阻的变化对转速估算的影响,并对严重影响速度估算的定子电阻的变化进行了补偿,从而构成无速度传感器感应电机间接磁场定向控制系统.仿真结果表明,该系统在低速下具有较好的转矩转速特性以及良好的抗干扰性.
According to a model reference adaptive system （MRAS）, a method for estimating the speed of sensorless induction motor （IM） drives was proposed. The adaptive full-order observer based on IM equation was used to estimate stator currents and rotor flux. The motor speed was estimated by a PI adaptive relation deduced from the Lyapunov＇s criterion and the stability of rotor speed estimation was proved by it. The effect of the variation from the stator resistance and the rotor resistance on speed estimation was ana- lyzed and the variation of the stator resistance greatly influenced the speed estimation was compensated. On the basis of the methods mentioned above, the speed sensorless indirect FOC control system was constructed. The simulation results showed that this system could give good torque, speed and good resistance at very low speed.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2005年第12期51-53,共3页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(60274020)
