Method for measuring and characterizing core loss in a motor
Method for measuring and characterizing core loss in a motor
复制标题
测量和表征电机铁芯损耗的方法
DOI：
10.1109/20.774185
复制
发表时间：
1999
影响因子：
2.1
通讯作者：
D. Lieu
中科院分区：
文献类型：
--
作者：
W. Lorimer;D. Lieu
由于电机齿形铁心形状复杂，磁通密度多变，对其铁心损耗的表征一直很困难。制造商的材料规格表通常只参考基于简单几何形状的正弦变化通量密度的爱泼斯坦测试。本文提出了一种更准确、更直接的铁芯损耗测量方法。该方法在磁场中旋转电机磁芯，然后测量施加在磁芯上的旋转速度和拖动扭矩。该试验成功地表征了小型直流无刷主轴电机的铁芯损耗。考察了车削速度、最大间隙通量、层合材料、层合厚度和去应力退火的影响。根据经验数据的假设形式，为特定的岩心几何形状构建了岩心损耗的数学模型。实际的堆芯损耗比传统的爱泼斯坦测试预测的要高。
Because of the complex shape and variable flux densities of the toothed cores of motors, characterization of their core losses has been difficult. Manufacturers' material specification sheets usually refer only to Epstein tests, based on sinusoidally varying flux densities in simple geometries. Here, a more accurate and direct method for measuring core loss is presented. The method spins the motor core in a magnetic field and then measures the spin speed and drag torque imposed on the core. This test was used to successfully characterize the core loss in a small dc brushless spindle motor. Among the parameters examined were the turning speed, maximum gap flux, lamination material, lamination thickness, and the effects of stress-relief annealing. Mathematical models of the core loss were constructed for specific core geometries based upon an assumed form for the empirical data. The actual core losses were higher than would have been predicted from conventional Epstein tests.