Abstract：At present, parametric measurement and extraction methods for rare-earth giant magnetostrictive rods (aka "rods") differ widely at home and abroad, and most of them have not considered the prestress change caused by rod elongation during the testing process. This leads to incomparability and inaccuracy of these measurement results. As a result, the simulation design of magnetostrictive transducer is not supported by reliable characteristic parametric data. This paper provides a test platform for rare-earth giant magnetostrictive rods considering the prestress change caused by rod elongation. This platform can be used to test the static and quasi-static characteristics of the rods including magnetostrictive performance, B-H curve, Young's modulus, etc. The pressure- holding device was integrated and optimized to improve the test accuracy. The comparative experiments show that with the proposed pressure-holding device, the rate of prestress change of rods can be reduced from 10.625% to below 1.134%, and the performance is more accurate. In addition, the platform was used to test the B-H curve and curve of the rods. Two important parameters, permeability and Young's modulus, are obtained, and their variations with magnetic field and prestress are analyzed. The platform proposed in this paper provides a reliable measurement method for the parameter extraction of giant magnetostrictive rods.
杜杲娴, 杨鑫, 韦艳飞, 宁倩, 罗安. 稀土超磁致伸缩棒材特性测试平台优化与实验研究[J]. 电工技术学报, 2021, 36(18): 3867-3875.
Du Gaoxian, Yang Xin, Wei Yanfei, Ning Qian, Luo An. Optimization and Experimental Research on the Test Platform of Rare-Earth Gaint Magnetostrictive Rod Characteristics. Transactions of China Electrotechnical Society, 2021, 36(18): 3867-3875.
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