非晶合金永磁同步电机杂散损耗的计算分析

发布时间：2018-02-28 23:32

本文关键词： 非晶合金永磁同步电机杂散损耗损耗测试　出处：《沈阳工业大学》2017年硕士论文　论文类型：学位论文

【摘要】：非晶合金材料是一种新型软磁材料,具有低铁耗、高磁导率的特点,其运用于电机铁心可以显著提高电机的效率。本文主要研究了非晶合金带材试样和非晶合金永磁同步电机的损耗特点,对非晶合金永磁同步样机的空载杂散损耗和负载杂散损耗进行计算分析。首先,在不同频率下对国产和日立公司生产的经过卷绕—浸漆固化—退火加工工艺后的非晶合金环形铁心试样进行损耗测试,经处理可得到各工艺下的磁性能B-H曲线、各个频率下的损耗曲线和因各加工工艺引起的损耗密度增量的修正系数关系式。其次,利用实测的带材损耗数据拟合推导出其修正系数,计算了一台2.1kW非晶合金径向磁通永磁同步电机的空载杂散损耗和负载杂散损耗,通过对比计算值与实验值得出其损耗计算修正系数,在此样例中空载杂散损耗计算修正系数为1.07,负载杂散损耗计算修正系数为1.06。最后,通过对比非晶合金电机与硅钢片电机实验数据,其最主要的优势在于铁耗小于硅钢片电机,但铜耗、杂散损耗均高于硅钢片电机,这导致了非晶合金电机效率优势不明显。以2.1kW非晶合金永磁同步电机与硅钢片电机在3000 r/min时为例,冷态时,额定负载情况下非晶合金电机的总损耗比硅钢片电机高12.3W,占额定功率1.575kW的0.78%;热态时,额定负载情况下非晶合金电机的总损耗比硅钢片电机低10.02W,占额定功率1.575kW的0.64%。非晶合金电机在反电动势低的情况下,其效率仍可以高于硅钢片电机,说明其损耗优势明显,特别是铁耗;非晶合金电机冷态效率低于硅钢片电机,而热态效率高于硅钢片电机,说明该非晶合金电机的磁负荷选取过高。在设计电机时,铁心齿、轭部磁密应小于1.2T。
[Abstract]:Amorphous alloy is a new kind of soft magnetic material with low iron consumption and high permeability. Its application in motor core can significantly improve the efficiency of motor. In this paper, the loss characteristics of amorphous alloy strip sample and amorphous alloy permanent magnet synchronous motor are studied. The no-load stray loss and load stray loss of amorphous alloy permanent magnet synchronous prototype are calculated and analyzed. The magnetic properties B-H curves of amorphous alloy annular core samples produced by domestic and Hitachi were measured at different frequencies after winding, enamelling, curing and annealing, and the magnetic properties of B-H curves were obtained by treatment. The relationship between the loss curve at each frequency and the increment of loss density caused by various processing processes is derived. Secondly, the correction coefficient is derived by fitting the measured strip loss data. The no-load stray loss and load stray loss of a 2.1 kW amorphous alloy radial flux permanent magnet synchronous motor are calculated. In this example, the calculating correction coefficient of no-load stray loss is 1.07, and the correction coefficient of load stray loss is 1.06.Finally, by comparing the experimental data of amorphous alloy motor and silicon steel sheet motor, the most important advantage is that the iron consumption is smaller than that of silicon steel sheet motor. However, copper consumption and stray loss are higher than those of silicon steel plate motor, which leads to the indistinct efficiency advantage of amorphous alloy motor. Taking 2.1 kW amorphous alloy permanent magnet synchronous motor and silicon steel sheet motor for example at 3000 r / min, in cold state, Under rated load, the total loss of amorphous alloy motor is 12.3 W higher than that of silicon steel sheet motor, accounting for 0.78 of rated power of 1.575kW. The total loss of amorphous alloy motor under rated load is 10.02 W lower than that of silicon steel sheet motor, which accounts for 0.64 of the rated power of 1.575kW. The efficiency of amorphous alloy motor can still be higher than that of silicon steel sheet motor when the back EMF is low, which shows that the loss advantage is obvious. The cold efficiency of amorphous alloy motor is lower than that of silicon steel sheet motor, but the hot state efficiency is higher than that of silicon steel sheet motor, which indicates that the magnetic load of the amorphous alloy motor is too high. When designing the motor, the magnetic density of the yoke should be less than 1.2 T.
【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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