永磁同步电机转子温度场计算与测量

发布时间：2018-04-09 12:45

本文选题：永磁同步电机　切入点：转子温度场计算　出处：《浙江大学》2017年硕士论文

【摘要】：永磁同步电机具有功率密度大,效率和功率因素高等优点,近年来,其商用化的产品已经在工业生产和生活的各个领域得到广泛的应用。永磁同步电机运行时,尤其是高扭矩密度和大功率密度的永磁同步电机,其转子中会有大量的涡流损耗,因而存在转子永磁体温升过高而发生永久性退磁等故障的隐患。因此,对永磁同步电机转子温度场的计算和测量,对优化永磁同步电机的设计和保障电机安全运行具有重大意义。本文围绕永磁同步电机转子温度场的计算和测量的要求,设计并制造实验用永磁同步电机。基于实验电机开展损耗分析,通过实验测量和电磁场有限元计算相结合的方法计算实验电机运行时的各项损耗。基于实验电机的结构尺寸,建立电机三维温度场和流体场仿真模型,分析并计算电机在三种不同工况下的仿真参数,采用计算流体力学软件Fluent计算各种工况下的电机整机稳态温升,并重点分析转子和永磁体的稳态温升分布特点,建立一套电机的温度场仿真分析方法。采用反电势法和温度传感器两种测温方案设计实验测量永磁同步电机转子永磁体的温度。反电势法基于永磁材料随着温度升高出现可逆退磁的特性,在电机定子槽上设置测量线圈,推导测量线圈的磁通和电机转子永磁体温度之间的关系,通过实验记录线圈的磁通值可计算得到转子永磁体的温度。温度传感器测量转子永磁体的温度,采用滑环作为信号传递装置,高性能模块化的滑环提高了接触式测温的准确性和可靠性。对比仿真和实验结果,研究仿真和两种测温方法的精度以及误差来源。在此基础上分析两种测温方法的优势和不足,作为永磁同步电机转子温度测量的方法,随着技术的进步,展望其应用前景。
[Abstract]:Permanent magnet synchronous motor has high power density, high efficiency and power factor advantages, in recent years, the commercial products have been widely applied in various fields of industrial production and life. Permanent magnet synchronous motor, especially the permanent magnet synchronous motor with high torque density and high power density, the rotor will be there are a lot of eddy current loss, so there is a rotor permanent magnet high temperature and permanent demagnetization fault risk. Therefore, the calculation and measurement of permanent magnet synchronous motor rotor temperature field, is of great significance for the optimal design of permanent magnet synchronous motor and ensure the safe operation of the motor. The permanent magnet synchronous motor rotor the temperature field calculation and measurement requirements, the permanent magnet synchronous motor is designed and manufactured by experiments. Experiments based on motor loss analysis method, by both experimental measurement and finite element calculation. Is the loss of motor run. The structure size of motor based on the establishment of the motor, the three-dimensional temperature field and fluid field simulation model, analysis and calculation of the motor in three different conditions, the simulation parameters, using CFD software Fluent to calculate the motor steady-state temperature under various conditions, and focuses on the analysis of steady-state rotor temperature the permanent magnet rise distribution characteristics, analysis method of temperature field simulation to establish a motor. The back EMF method and two kinds of temperature sensor temperature measurement scheme design experiment of permanent magnet synchronous motor rotor permanent magnet temperature. The back EMF method of permanent magnetic material with temperature characteristic based on reversible demagnetization coil in the stator, measuring set depending on the relationship between the flux and the derivation of coils for measuring temperature of permanent magnet motor rotor, permanent magnet rotor can be calculated through the experimental value of recording coil flux Body temperature. The temperature of the permanent magnet rotor temperature sensor, the slip ring as a signal transmission device, high performance modular ring to improve the accuracy and reliability of the contact temperature. Comparing the results of simulation and experiment, the simulation and study of two kinds of temperature measurement accuracy and error source. Based on the analysis of two kinds of temperature measurement method the advantages and disadvantages, as a method of permanent magnet synchronous motor rotor temperature measurement, with the progress of technology, its application prospect.

【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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