| 王宁,张鹏宁,李坤诚,程红,王聪,张荐.基于磁环自升温的纳米晶材料磁热特性测量方法研究[J].电子测量与仪器学报,2025,39(6):78-87 |
| 基于磁环自升温的纳米晶材料磁热特性测量方法研究 |
| Research on measurement methods for magnetic and thermal properties ofnanocrystalline materials based on magnetic ring self-heating |
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| DOI： |
| 中文关键词: 纳米晶 温升 磁环 自升温 去磁 磁热特性 |
| 英文关键词:nanocrystalline temperature rise magnetic ring self-heating demagnetization magnetic and thermal property measurement |
| 基金项目:国家自然科学基金（52007192）、国家电网公司总部攻关项目（SGAHDK00SPJS2200430）、中央高校基本科研业务费专项资金资助(2023ZKPYJD09)项目 |
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| Author | Institution |
| Wang Ning | School of Mechanical and Electrical Engineering, China University of Mining and Technology(Beijing), Beijing 100083,China |
| Zhang Pengning | School of Mechanical and Electrical Engineering, China University of Mining and Technology(Beijing), Beijing 100083,China |
| Li Kuncheng | School of Mechanical and Electrical Engineering, China University of Mining and Technology(Beijing), Beijing 100083,China |
| Cheng Hong | School of Mechanical and Electrical Engineering, China University of Mining and Technology(Beijing), Beijing 100083,China |
| Wang Cong | School of Mechanical and Electrical Engineering, China University of Mining and Technology(Beijing), Beijing 100083,China |
| Zhang Jian | China Electric Power Research Institute, Beijing 100192,China |
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| 摘要点击次数: 9 |
| 全文下载次数: 5 |
| 中文摘要: |
| 温度对软磁材料的磁特性存在一定的影响，高频变压器优化设计需重点考虑温升参量，但目前软磁材料在不同温度下磁特性测试，变温时间依赖实验者主观判断，加热时间不足，测试精度较低，加热时间过长，效率较低。因此，提出一种磁环自升温的磁特性测量方法，旨在保证磁特性测量精度的同时提高测量效率。以高频变压器的优选材料即纳米晶材料为研究对象，研究了纳米晶磁环温升的影响因素，并据此设计激励电路使磁环快速升温，当磁环温度达到指定温度后，使用低频交流衰减激励对纳米晶磁环进行去剩磁处理，以满足指定温度的测试条件，并通过励磁和测量电路得到其磁特性参数。最终，设计并搭建了纳米晶磁环的传统恒温箱和自升温磁热特性测试系统，通过两种方法的测量结果对比验证了所提方法在保证精度的前提下提高了测量效率。所提测量方法可模拟磁性材料实际温升变化，将升温时间缩短90%以上，且可对磁环温度进行定值改变，具有变温准确、可控、快速等优点，为高频变压器的多物理场耦合和优化设计提供了实验和数据基础。 |
| 英文摘要: |
| Temperature has a certain impact on the magnetic properties of soft magnetic materials, and temperature rise parameters are crucial considerations in high-frequency transformer design optimization. However, in magnetic characteristics test of soft magnetic materials at different temperatures, the temperature variation time relies on subjective judgment of experimenters. If the heating time is insufficient, the testing accuracy is relatively low, while excessive heating results in low efficiency. Therefore, a self-heating magnetic property measurement method for magnetic rings was proposed, aiming to ensure the measurement accuracy while improving efficiency. Nanocrystalline materials, preferred materials for high-frequency transformers, are used as the study object in this paper, aiming to investigate factors influencing temperature rises of nanocrystalline magnetic rings, and an excitation circuit is subsequently designed to rapidly heat the magnetic rings. Once the magnetic rings reach the target temperatures, they are demagnetized through low-frequency AC attenuating excitations to meet the testing conditions at designated temperatures. The magnetic property parameters are then obtained by using the excitation and measurement circuit. Finally, a traditional constant temperature box of nanocrystalline magnetic rings and a self-heating magnetocaloric characteristic testing system are designed and built. The comparison between measurement results from the two methods validates the improved efficiency of the proposed method on the premise of ensuring the accuracy. By simulating actual temperature rises of magnetic materials, the proposed measurement method reduces the heating time by over 90%, and changes the temperature of the magnetic rings by a constant value, thus achieving advantages of precise, controlled, and rapid temperature changes. This method provides an experimental and data foundation for multi-physics coupling and design optimization in high-frequency transformers. |
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