永磁同步电机在变频空调的应用研究

发布时间：2018-04-21 07:55

本文选题：变频空调 + 永磁同步电机　；参考：《华南理工大学》2014年硕士论文

【摘要】：本文研究对象是家用变频空调器的压缩机用调速永磁同步电机。本研究工作拟采用磁路解析法与有限元分析法结合形式。取得达到在尽量降低电机转矩波动，减低电磁噪音的基础上，实现电机在各个频率下，在较宽的转矩范围内保持较高的效率。首先采用路的方法确定电机的结构尺寸，永磁体所在槽的位置，转子极数等。然后采用磁场有限元法来分析电机的性能。根据分析结果对电机的结构尺寸进行优化。本文还采用不均匀气隙的方式，，达到气隙磁密的正弦化分布，反电动势波形的正弦化；分析反电动势的谐波含量，研究含量较大的低次谐波对电机的噪音和振动的影响，以及对控制器的影响。同时校核了空调使用过程中，电动机启动过程时，永磁体的退磁程度。并通过软件提供的计算工具，得到较高精度的交直轴电感值，并用于驱动器的参数设定，使得电动机运行良好，性能表现优异。本文还制作了工程样机，并进行了性能测试，将电动机的设计值与实际测试值进行了对比，通过测试变频压缩机和对应空调器的性能，以验证是否满足工程需要。
[Abstract]:The research object of this paper is the speed-regulating permanent magnet synchronous motor used in the compressor of the household frequency conversion air conditioner. In this study, the magnetic circuit analysis method and finite element analysis method are adopted. On the basis of reducing the torque ripple and reducing the electromagnetic noise, the motor can maintain a high efficiency in a wide torque range at various frequencies. Firstly, the structure size of the motor, the position of the permanent magnet slot, the number of rotor poles and so on are determined by the method of path. Then the magnetic field finite element method is used to analyze the performance of the motor. According to the analysis results, the structure size of the motor is optimized. In this paper, the inhomogeneous air gap is used to achieve the sinusoidal distribution of the air gap magnetic density and the sinusoidal wave of the backEMF wave, and the harmonic content of the backEMF is analyzed to study the influence of the lower harmonic wave on the noise and vibration of the motor. And the effect on the controller. At the same time, check the demagnetization degree of permanent magnet during the operation of air conditioning. Through the calculation tools provided by the software, a high precision AC straight axis inductance is obtained, and it is used to set the parameters of the driver, which makes the motor run well and the performance is excellent. The design value of motor is compared with the actual test value, and the performance of frequency conversion compressor and corresponding air conditioner is tested to verify whether it meets the engineering needs.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM925.12;TM341

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