【作者】 王志民；

【导师】 冯晓云；

【作者基本信息】 西南交通大学 ， 电机与电器， 2006， 硕士

【摘要】 异步电机无速度传感器矢量控制技术提高了交流传动系统的可靠性,降低了系统的实现成本。准确辨识电机转速是实现无速度传感器矢量控制的关键。利用模型参考自适应方法(MRAS)进行转速估计的方法是一种高性能、中等复杂度的转速辨识方法,是公认最有前途的转速估计方法。本文对基于MRAS的无速度传感器矢量控制系统进行了研究。 以异步电机为控制对象,深入研究无速度传感器的矢量控制系统、MRAS的数学模型。论文重点研究了转子磁链MRAS、反电动势MRAS和瞬时无功功率MRAS三种速度估计模型,分析了各种模型的理论基础,从理论上证明了采用瞬时无功功率MRAS转速辨识的速度估计性能最佳。 在理论分析的基础上,利用MATLAB/SIMULINK工具,建立了相应的系统仿真模型,获得了仿真结果。对比结果,可以发现采用瞬时无功功率的MRAS法方法的速度估计性能最好,与理论分析一致。 在基于双DSP(TMS320LF2407和TMS320VC33)的实验平台上,进行了实验研究,完成了开环V/F和有速度传感器转子磁场定向矢量控制实验。对采用瞬时无功功率MRAS的转速辨识算法的无速度传感器矢量控制进行了初步实验,验证了该辨识算法的正确性。更多还原

【Abstract】 The speed sensorless vector control of induction motor technology enhances the reliability of AC driving system, and reduces the realization cost. The key problem is that how we can get the speed of motor accurately. The MRAS based on speed estimation was widely considered as the brightest outlook among high performance speed estimation schemes, because of its medium calculation ability requirement and very high precision. MRAS-based speed sensorless vector control system is studied in the thesis.Speed sensorless vector control of induction motor system and MRAS math model are analysed in the thesis. Three speed estimation model based on the flux MRAS, the emf MRAS and the instantaneous reactive power (IRP) MRAS are analysed especially in the thesis, and compare them each other, the results show that the method based on IRP model MRAS has excellent speed identification performance in theory.The simulation model of system is set up according to the basic theories of the speed sensorless vector control system and MRAS algorithm, at the same time simulate using MATLAB/SIMULINK, and compare the simulation results using the three MRAS speed estimation models mentioned above, the simulation results show that speed identification performance using IRP model MRAS is best, it accord with theory analysis.Some experiments have been done in the test-bed based on the dual DSP.V/F and rotor field-orientation indirect vector control experiment have accomplished. Also the initial experiment of speed sensorless vector control based on IPR MRAS has been done, the results prove that the speed identification algorithm is feasible.更多还原