Dry-pressed anisotropic ferrite radial multi-pole magnet and production method
A technology of dry pressing heterosexual and ferrite, which is applied in the manufacture of inductors/transformers/magnets, magnetic objects, magnets, etc. It can solve the problems of low magnetic strength on the radial multi-pole magnetized surface, save finished products and improve the surface Strength, effect to reduce loss of electricity
Inactive Publication Date: 2015-02-11
宁波市海曙捷欣磁性材料厂
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to overcome the existing defects, and provide a dry-pressed heterosexual ferrite radial multipole magnet and its production method, which solves the problem of low magnetic intensity on the radial multipole magnetized surface, and can Greatly improve the surface magnetic strength of the magnetic ring
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[0025] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0026] Such as figure 1 A dry-pressed heterosexual ferrite radial multipole magnet shown includes a magnet 1, the magnet 1 is cylindrical, and there is a cavity 3 inside the magnet 1; there is an end face 2 at one end of the magnet 1; the end face 2 There is a groove 5 on it; there is a table 4 between the magnet 1 and the cavity 3; the axis line of the magnet 1 and the axis line of the cavity 3 are the same straight line; the end face 2 is "C" type; the The diameter of the magnet 1 is 45-50mm; the diameter of the cavity 3 is 25-35mm.
[0027] A dry-pressed anisotropic ferrite radial multipole magnet also includes its production method, including the following step...
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Abstract
The invention provides a dry-pressed anisotropic ferrite radial multi-pole magnet and a production method. The dry-pressed anisotropic ferrite radial multi-pole magnet comprises a magnet body which is cylindrical, and a cavity exists inside the magnet body; one end of the magnet is provided with an end face which is provided with a groove; a tabletop is formed between the magnet body and the cavity. By the dry-pressed anisotropic ferrite radial multi-pole magnet and the production method, surface strength of a magnet ring can be improved greatly; by applying the magnet produced by the technique to a brushless motor rotor, under the condition of same specification and performance, power of the motor can be increased, and electrical loss is reduced. The dry-pressed anisotropic ferrite radial multi-pole magnet is cheaper than adhesive neodymium iron boron magnetic steel with the same function by 300-400%, and finished products of the motor are saved greatly.
Description
technical field [0001] The invention relates to the field of electronic equipment, in particular to a production method of a multi-pole magnet. Background technique [0002] The relative magnetic permeability of ferrite can be as high as several thousand, the resistivity is 1011 times that of metal, and the eddy current loss is small, which is suitable for making high-frequency electromagnetic devices. There are five types of ferrites: hard magnetic, soft magnetic, moment magnetic, gyromagnetic and piezo magnetic. Formerly known as ferrite or ferrite, its production process and appearance are similar to ceramics, so it is also called magnetic porcelain. Ferrite is a composite oxide of iron and one or more other suitable metal elements. The property belongs to semiconductor and is usually used as a magnetic medium. The most important difference between ferrite magnetic materials and metal or alloy magnetic materials is electrical conductivity. Usually the resistivity of th...
Claims
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IPC IPC(8): H01F7/00H01F41/02
Inventor 李存华
Owner 宁波市海曙捷欣磁性材料厂