High-resistance magnetic powder, bonded magnet and preparation method thereof

A technology of bonded magnets and high resistance, applied in the direction of inductance/transformer/magnet manufacturing, magnetic objects, circuits, etc., can solve the problems of motor output power and efficiency limitations, achieve output power and efficiency improvement, easy implementation, simple operation Effect

Inactive Publication Date: 2020-04-17
CHENGDU GALAXY MAGNETAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the problem existing in the prior art: permanent magnets cannot meet the conditions of strong magnetic properties and high resistivity at the same time, so that the output power and efficiency of the motor are limited

Method used

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  • High-resistance magnetic powder, bonded magnet and preparation method thereof
  • High-resistance magnetic powder, bonded magnet and preparation method thereof
  • High-resistance magnetic powder, bonded magnet and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] A high-resistance magnetic powder is made of the following raw materials in parts by mass:

[0072] NdFeB magnetic powder 100g, acrylic resin 1g.

[0073] The insulating resin is used to wrap the surface of the magnetic powder to improve the insulating performance of the magnetic powder. The NdFeB magnetic powder has strong magnetic properties. The permanent magnet prepared with this high-resistance magnetic powder can have strong magnetic properties and high resistance at the same time.

Embodiment 2

[0075] A high-resistance magnetic powder is made of the following raw materials in parts by mass:

[0076] NdFeB magnetic powder 100g, epoxy resin 10g, permanent magnet ferrite powder 5g, CaCO 3 Powder 1g.

[0077] The insulating resin is used to wrap the surface of the magnetic powder to improve the insulating performance of the magnetic powder. The NdFeB magnetic powder has strong magnetic properties. The permanent magnet prepared with this high-resistance magnetic powder can have strong magnetic properties and high resistance at the same time. Adding permanent magnets Oxygen powder can adjust the magnetic properties of permanent magnets according to needs, inorganic insulating powder CaCO 3 Powder can further enhance the insulation treatment of magnetic powder.

Embodiment 3

[0079] A high-resistance magnetic powder is made of the following raw materials in parts by mass:

[0080] NdFeB magnetic powder 80g, SmFeN magnetic powder 20g, phenolic epoxy resin 5g, permanent magnet ferrite powder 30g, CaCO 3 Powder 10g.

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Abstract

The invention discloses high-resistance magnetic powder, and a bonded magnet and a preparation method thereof. The high-resistance magnetic powder is prepared from the following raw materials in partsby weight: 100 parts of magnetic powder and 0.1-10 parts of insulating resin, wherein the magnetic powder is one or a mixture of two of NdFeB magnetic powder and SmFeN magnetic powder, the weight ratio of the insulating resin to the magnetic powder is (0.1-10):100, and the insulating resin wraps the surface of the magnetic powder. The invention also discloses a process method for preparing the bonded magnet. The method comprises the following steps of: uniformly mixing the high-resistance magnetic powder and the binder in proportion to obtain a bonded magnet mixture; and processing and forming the bonded magnet mixture to obtain a magnet blank; and then, completing curing to obtain the bonded magnet. The bonded magnet provided by the invention can meet the conditions that the magnet has relatively the strong magnetic performance and relatively high resistivity at the same time, so that the output power and efficiency of the motor are improved.

Description

technical field [0001] The invention belongs to the field of preparation of permanent magnetic materials, and relates to a high-resistance magnetic powder, a bonded magnet and a preparation method thereof. Background technique [0002] Permanent magnets are used in permanent magnet motors to generate magnetic fields, so that the energized coil windings are subjected to electromagnetic forces in the magnetic fields generated by the magnets, and finally realize the conversion from electrical energy to mechanical energy. [0003] In order to make the motor have higher output power and efficiency, it is not only necessary to improve the magnetic properties of the permanent magnet, but also to meet the larger resistivity of the magnet, so as to avoid the excessive current eddy current induced after the coil is energized in the motor, which will cause the magnet Heat, which eventually leads to a reduction in the performance of the permanent magnet. [0004] In practical applicati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/00H01F41/02
CPCH01F1/00H01F41/02
Inventor 张宇周胜海代华进吴志坚
Owner CHENGDU GALAXY MAGNETAB
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