Ferromagnetic powder for dust core
First Claim
1. A ferromagnetic powder for a magnetic core component comprising a plurality of particles, each of the particles including a central core and a shell coated on the central core, the central core being made of magnetic material and configured for providing magnetic property for the magnetic core component, the shell having a higher electrical resistance than the central core and being configured for reducing an eddy current loss of the magnetic core component and for providing a bonding strength between the plurality of particles of the powder, a material for the shell being one of piezoelectric material and ferroelectric material.
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Accused Products
Abstract
A particle (10) of ferromagnetic powder for use in preparation of soft magnetic core components has a core-shell structure. The particle includes a central core (12) and a shell (14) coated on the central core. The central core is made of magnetic material and is used for providing the necessary magnetic property for the magnetic core components made from the ferromagnetic powder. The shell has a higher electrical resistance than the central core so as to reduce an eddy current loss of the magnetic core component. The shell also functions to provide an excellent bonding strength between particles of the powder.
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Citations
11 Claims
- 1. A ferromagnetic powder for a magnetic core component comprising a plurality of particles, each of the particles including a central core and a shell coated on the central core, the central core being made of magnetic material and configured for providing magnetic property for the magnetic core component, the shell having a higher electrical resistance than the central core and being configured for reducing an eddy current loss of the magnetic core component and for providing a bonding strength between the plurality of particles of the powder, a material for the shell being one of piezoelectric material and ferroelectric material.
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7. A method for forming a stator core of a fan motor comprising:
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preparing ferromagnetic powder comprising a plurality of particles each including at least a magnetic core and at least a shell on an outer surface of the at least a magnetic core, the at least a shell being coated on the at least a magnetic core by diffusion/precipitation mechanism, the at least a shell having a higher electrical resistance than the magnetic core; and forming the ferromagnetic powder into a desired shape of the stator core by mold pressing and heating the powder wherein the shells are heated to diffuse and bond with each other to connect the powder together. - View Dependent Claims (8, 9, 10, 11)
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Specification