基于软磁复合材料的永磁同步电机铁耗特性研究

发布时间：2018-05-18 15:55

本文选题：软磁复合材料 + 永磁同步电动机　；参考：《沈阳工业大学》2017年硕士论文

【摘要】：软磁复合材料(SMC材料)在最近十几年得到了飞速发展,并且在许多领域得到了应用。和硅钢片材料不同,SMC材料电阻率高,磁、热各向同性,涡流损耗小、可以直接模压成型,但磁滞损耗较大,所以要推广商业应用必须研究SMC材料区别于硅钢片的损耗特性,让它应用在最适合的工况下,才能发挥其优势。本课题来自于国家自然科学基金项目——软磁复合材料的圆筒形直线电机推力波动与材料铁耗特性研究。本文通过理论和实验对SMC材料磁特性,SMC材料永磁同步电机铁耗特性等关键问题展开了深入研究。首先使用BROCKHAUS硅钢测量装置对SMC材料的环形试样的磁特性进行了测量。对SMC材料与DW470磁性能的对比分析,进一步说明了SMC材料的优势与不足,为SMC材料电机的设计提供了参考依据。其次设计出了两台分别以SMC材料和DW470为铁心的永磁同步电机,使用有限元方法计算对比了两台样机空载磁场分布和气隙磁密,分析出了SMC材料磁导率较低对电机磁场带来的影响。然后通过负载试验,得到在同频率下两台样机效率的变化规律。最后,对SMC不同频率下的损耗曲线进行非线性回归分析,得到SMC材料的磁滞损耗、涡流损耗、附加损耗系数。然后通过有限元方法,根据定子铁心不同区域磁场的变化规律,综合考虑电机中交变和旋转磁场的影响,对两台样机的磁滞、涡流损耗以及总的铁耗进行了分析对比,并验证了SMC材料在高频情况下的优越性。
[Abstract]:Soft magnetic composite material (SMC) has been developed rapidly in recent years and has been applied in many fields. Different from silicon steel sheet material, the material has high resistivity, magnetic, thermal isotropy, low eddy current loss, and can be molded directly, but the hysteresis loss is large, so it is necessary to study the loss characteristics of SMC material different from silicon steel sheet in order to promote commercial application. Let it be applied in the most suitable operating conditions, can play its advantages. This topic comes from the research of thrust fluctuation and iron loss characteristics of cylindrical linear motor for soft magnetic composite material, which is a project of National Natural Science Foundation. In this paper, the magnetic properties of SMC materials and the characteristics of iron loss of PMSM are studied in theory and experiment. The magnetic properties of annular samples of SMC materials were measured by BROCKHAUS silicon steel measuring device. The comparative analysis of the magnetic properties of SMC and DW470 further explains the advantages and disadvantages of SMC materials and provides a reference for the design of SMC motors. Secondly, two permanent magnet synchronous motors (PMSM) with SMC and DW470 as the core are designed, and the no-load magnetic field distribution and air-gap magnetic density of the two prototypes are calculated and compared by finite element method. The influence of low permeability of SMC material on the magnetic field of motor is analyzed. Then through the load test, the variation law of efficiency of two prototypes at the same frequency is obtained. Finally, the nonlinear regression analysis of the loss curves at different frequencies of SMC is carried out, and the hysteresis loss, eddy current loss and additional loss coefficient of SMC materials are obtained. Then the hysteresis, eddy current loss and total iron loss of the two prototypes are analyzed and compared by the finite element method, according to the variation rule of magnetic field in different regions of stator core, and considering the influence of alternating and rotating magnetic field in the motor, the magnetic hysteresis, eddy current loss and total iron loss of the two prototypes are analyzed and compared. The superiority of SMC in high frequency is verified.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM341

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