稀土超磁致伸缩棒材特性测试平台优化与实验研究

doi:10.19595/j.cnki.1000-6753.tces.200918

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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.

Key words： Rare-earth giant magnetostrictive materials prestress magnetostrictive performance permeability Young's modulus

Received: 24 July 2020

PACS:	TM271
	TN712+.2

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	Du Gaoxian
	Yang Xin
	Wei Yanfei
	Ning Qian
	Luo An

Cite this article:

Du Gaoxian,Yang Xin,Wei Yanfei等. Optimization and Experimental Research on the Test Platform of Rare-Earth Gaint Magnetostrictive Rod Characteristics[J]. Transactions of China Electrotechnical Society, 2021, 36(18): 3867-3875.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.200918 OR https://dgjsxb.ces-transaction.com/EN/Y2021/V36/I18/3867

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