永磁同步电动机全转速范围基于模型参考自适应的无传感器控制

发布时间：2018-10-17 20:42

【摘要】：针对永磁同步电动机单一无位置传感器控制方法难以满足全转速范围运行要求、且起动阶段特殊等缺点,本文提出了一种基于分段PI调节器的模型参考自适应控制方法(MRAS)。利用该方法,电机可以在全转速范围条件下得到较好的控制效果。此外,本文利用PWM驱动信号占空比与直流母线电压重构定子三相反电势,可以使电机在任意转子初始位置闭环起动并能稳定运行在低转速下。本文以风机负载的1.5kW内置式永磁同步电动机为研究对象,开展了 Matlab仿真研究,并且根据仿真搭建了基于STM32F407单片机的实验平台。经过详细的实验,并对实验数据进行分析比较后,证明了基于分段PI调节器的MRAS无传感器控制系统能够在电机全转速范围获得良好的控制效果。并与传统的基于固定PI调节器的MRAS系统进行比较,证明了分段PI调节器MRAS系统有更好的观测精度与稳定性。
[Abstract]:In view of the disadvantages of single sensorless control method of permanent magnet synchronous motor (PMSM), which is difficult to meet the requirements of full speed range operation and special starting stage, a model reference adaptive control method based on piecewise PI regulator (MRAS).) is proposed in this paper. By using this method, the motor can obtain better control effect under the condition of full speed range. In addition, using the duty cycle of PWM drive signal and DC bus voltage to reconstruct the stator three opposite potential, the motor can be started in closed loop at any rotor initial position and can run stably at low speed. In this paper, the 1.5kW built-in permanent magnet synchronous motor loaded by fan is taken as the research object, the Matlab simulation research is carried out, and the experimental platform based on STM32F407 single chip microcomputer is built according to the simulation. After detailed experiments and analysis and comparison of the experimental data, it is proved that the MRAS sensorless control system based on the piecewise PI regulator can obtain good control effect in the full speed range of the motor. Compared with the traditional MRAS system based on fixed PI regulator, it is proved that the piecewise PI regulator MRAS system has better observation accuracy and stability.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM341

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