Though the accurate description of the ferromagnetic excitation characteristics is closely related with magnetization model. this paper modifies the unphysical solution in minor loop and equation of loss factor k based on modified J-A model with H as input which is derived from classical J-A static hysteresis model. The Hysteresis loop of iron core is measured through oscilloscope method, and the validation and accuracy of modified J-A model is verified by comparison between the hysteresis loop calculated and the experiments.% 铁磁材料励磁特性描述的准确性与磁化模型密切相关。在重新推导以磁场强度H为输入量的经典J-A磁滞模型基础上，对模型中局部磁滞回线的非物理解进行改进，并基于磁化机理提出损耗系数k的修正方程，形成了改进的J-A磁滞模型。通过示波器法测量铁心的磁滞回线并与其对应的改进J-A磁滞模型的理论值进行对比，验证了模型的有效性和准确性。
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