The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 05, 2024
Filed:
Jul. 11, 2023
Hangzhou Magmax Technology Co., Ltd., Zhejiang, CN;
Hangzhou Foresee Group Holding Co., Ltd., Zhejiang, CN;
Jinghui Di, Zhejiang, CN;
Huiqiang Liu, Zhejiang, CN;
Xiongfei Wu, Zhejiang, CN;
Shengli Jia, Zhejiang, CN;
Hui Meng, Zhejiang, CN;
Qifeng Wei, Zhejiang, CN;
Hangzhou Magmax Technology Co., Ltd., Hangzhou, CN;
Hangzhou Foresee Group Holding Co., Ltd., Hangzhou, CN;
Abstract
The present application relates to a technical field of determining an irreversible demagnetization of a grain boundary diffusion NdFeB magnet, and more particularly, to a method for identifying an irreversible demagnetization of a grain boundary diffusion NdFeB magnet by magnetic field distribution. After applying a reverse magnetic field to a saturatedly magnetized grain boundary diffusion NdFeB magnet, if a number of magnetic poles on a non-diffusion face of the grain boundary diffusion NdFeB magnet is increased, it is determined that there is an irreversible demagnetization in the grain boundary diffusion NdFeB magnet.