电工软磁材料旋转磁滞损耗测量及建模

Measurement and Modeling of Rotational Hysteresis Loss of Electric Soft Magnetic Material

电力变压器和电机中存在旋转铁心损耗是其损耗预测不准的主要原因之一。针对该问题,提出电工软磁材料旋转磁滞损耗测量及建模方法。首先,矢量磁滞损耗分解为切向损耗和法向损耗两部分,分别根据圆形旋转损耗和交变损耗建模。其次,对软磁复合材料和无取向电工钢片进行模型参数辨识,并比较两种材料的损耗特性和模型参数。最后,利用三维磁特性测量装置进行多种励磁模式下的损耗测量,并对比实验结果与模型预测值。结果表明,在旋转复杂激励下,所提出的模型比传统的Steinmetz模型有更高的精度。

The rotational flux in the core of power transformer and motor causes the inaccuracy efficiency computation of magnetic apparatus. In order to address the problem, this work focuses on magnetic measurement of rotational magnetization and its hysteresis loss modeling. Firstly, the vector hysteresis loss is decomposed into the transverse and radial components which are defined based on rotational loss and alternating loss, respectively. Secondly, the model parameters of soft magnetic composites and non-oriented silicon steel are identified. Their magnetic properties and model parameters are compared and analyzed. Finally, a series of complex excitation magnetization experiments on non-oriented silicon steel are carried out. The measurement results are compared with the predicted values by the model. It shows that the proposed model gives more exact predicted results than the traditional Steinmetz method.