1. State Key Laboratory of Reliability and Interlligence of Electrical Equipment Hebei University of Technology Tianjian 300130 China;
2. Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province Hebei University of Technology Tianjian 300130 China
The giant magnetostrictive material TbDyFe alloy has temperature-sensitive characteristics. In this paper, the dynamic magnetic characteristic curves of TbDyFe alloy are measured under variable temperature conditions at different frequencies f and magnetic density amplitude Bm. When the frequency f and magnetic density amplitude Bm are fixed, with the increase of the ambient temperature (from 10℃ to 80℃), the amplitude permeability gradually increases, the dynamic hysteresis loop becomes narrower laterally, the required magnetic field strength decreases, and the magnetic energy loss gradually decreases. Since the existing loss calculation model cannot effectively characterize the temperature effect that leads to errors in the loss calculation results, a high-frequency loss calculation model for magnetostrictive materials under variable temperature conditions is proposed. The model corrects the loss coefficients by introducing temperature-related terms. Considering the influence of high-frequency hysteresis characteristics and skin effect, the loss additional magnetic flux density terms and loss additional frequency terms are introduced. Accordingly, an improved loss calculation model that can effectively consider the temperature effect is established. The comparison of measured and calculated results verifies the accuracy and feasibility of the model.
黄文美, 夏志玉, 郭萍萍, 翁玲. 变温条件下TbDyFe合金高频磁特性和损耗特性分析[J]. 电工技术学报, 2022, 37(1): 133-140.
Huang Wenmei, Xia Zhiyu, Guo Pingping, Weng Ling. Analysis of High Frequency Magnetic Properties and Loss Characteristics of TbDyFe Alloy under Variable Temperature. Transactions of China Electrotechnical Society, 2022, 37(1): 133-140.
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2022, Vol. 37 
