Measurement Error of the Coercivity Hcj of NdFeB Permanent Magnet Caused by Air Gap

Wen Huan Xu; Ai Zhi Sun; Shen Wu; Jun Yang; Chao Zou; Juan Dong

doi:10.4028/www.scientific.net/AMR.652-654.607

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 652-654Measurement Error of the Coercivity Hcj of NdFeB...

Measurement Error of the Coercivity H_cj of NdFeB Permanent Magnet Caused by Air Gap

Abstract:

Regular rare earth permanent magnet measurement systems are only able to measure standard samples with a fixed size. But NdFeB materials are usually processed into various kinds of shapes. Bonding magnets are even often formed together with the shaft or other parts. So there will be a distinct error in conventional measurement. The magnetic field intensity distribution between two poles of the system was analyzed. Because of the existence of air gap between the magnet and the poles of the measurement system, the measurement magnetic circuit is open in this experiment. By changing the height of the magnet and air gap, the measurement error of the intrinsic coercivity Hcj of NdFeB magnets is researched under this condition.

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Periodical:

Advanced Materials Research (Volumes 652-654)

Pages:

607-611

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.652-654.607

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Online since:

January 2013

Authors:

Wen Huan Xu, Ai Zhi Sun, Shen Wu, Jun Yang, Chao Zou, Juan Dong

Keywords:

Coercivity H_cj, NdFeB, Non-Destructive Measurement, Non-Standard

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