Invention Grant
US09449752B2 Dust core, method of manufacturing said dust core, and inductance element and rotary electric machine including said dust core
有权
防尘芯，制造所述防尘芯的方法，以及包括所述防尘芯的电感元件和旋转电机
- Patent Title: Dust core, method of manufacturing said dust core, and inductance element and rotary electric machine including said dust core
- Patent Title (中): 防尘芯，制造所述防尘芯的方法，以及包括所述防尘芯的电感元件和旋转电机
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Application No.: US14522162Application Date: 2014-10-23
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Publication No.: US09449752B2Publication Date: 2016-09-20
- Inventor: Masami Taguchi , Shigeho Tanigawa , Shin Noguchi
- Applicant: Hitachi Metals, Ltd.
- Applicant Address: JP Tokyo
- Assignee: Hitachi Metals, Ltd.
- Current Assignee: Hitachi Metals, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Crowell & Moring LLP
- Priority: JP2013-221938 20131025
- Main IPC: H01F27/02
- IPC: H01F27/02 ; H01F27/255 ; B22F1/02 ; H01F41/02 ; H01F1/153 ; B22F5/10
Abstract:
It is an objective of the invention to provide a dust core made of an Fe-based amorphous metal powder having excellent magnetic properties, in which the dust core has a higher-than-conventional density, excellent magnetic properties and a high mechanical strength. There is provided a dust core including a mixture powder compacted, the mixture powder including: an Fe-based amorphous metal powder having a crystallization temperature Tx (unit: K), the Fe-based amorphous metal powder being plastically deformed, the plastically deformed metal Fe-based amorphous metal powder having a filling factor in the dust core higher than 80% and not higher than 99%; and a resin binder having a melting point Tm (unit: K), in which the Tx and Tm satisfy a relationship of “Tm/Tx≧0.70”.
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