Magnet assembly and preparing method thereof

A technology of magnet components and magnetic sheets, which is applied in the direction of magnetic objects, inductance/transformer/magnet manufacturing, magnetic materials, etc., can solve the problems of difficult control of glue output, low viscosity of glue, long time, etc., and achieve favorable glue output The effect of controlling, ensuring insulation and uniform thickness

Active Publication Date: 2018-01-12
TIANJIN SANHUAN LUCKY NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no filler in the adhesive layer, the viscosity of the colloid is small and the speed is fast, and it is difficult to control the amount of glue.
And in its actual operation, there are many steps for mass production, long time and high cost

Method used

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  • Magnet assembly and preparing method thereof
  • Magnet assembly and preparing method thereof
  • Magnet assembly and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The magnet assembly prepared in this embodiment includes 4 magnet pieces, and the magnet piece to be glued is a phosphating surface-treated product with a size of 30×24.5×2mm, wherein the 2mm length direction is the orientation direction of the magnet piece. The magnet assembly preparation process is as follows:

[0047] 1. Mix epoxy resin glue and irregularly shaped quartz sand particles evenly to obtain adhesive glue. The particle size D50 of the irregularly shaped quartz sand particles is controlled to be 10 μm, and its mass is 8 wt% of the mass of the epoxy resin glue. Vacuumize and stir in a closed container at a stirring speed of 200 rpm for 1 h.

[0048] 2. Pour the glue into the rubber cylinder of the automatic glue dispenser, and spray it onto the upper surface of the magnetic sheet through the glue dispenser.

[0049] 3. Superimpose the glued magnetic pieces in sequence. The fourth magnetic piece is not glued, but placed directly on the glued surface of the t...

Embodiment 2

[0069] The magnet assembly prepared in this embodiment includes 4 magnet pieces, and the magnet piece to be glued is a phosphating surface-treated product with a size of 30×24.5×2mm, wherein the 2mm length direction is the orientation direction of the magnet piece. The preparation process is as follows:

[0070] 1. Mix epoxy resin glue and irregularly shaped quartz sand particles evenly to obtain adhesive glue. The particle size D50 of the irregularly shaped quartz sand particles is controlled to be 20 μm, and its mass is 3 wt % of the mass of the epoxy resin glue. Vacuumize and stir in a closed container at a stirring speed of 200 rpm for 1 h.

[0071] 2. Pour adhesive glue into the rubber cartridge of the glue dispenser, and spray it onto the upper surface of the magnetic sheet through the glue dispenser.

[0072] 3. Superimpose the glued magnetic pieces in sequence. The fourth magnetic piece is not glued, but placed directly on the glued surface of the third magnetic piece...

Embodiment 3

[0078] The magnet assembly prepared in this embodiment includes 4 magnet pieces, and the magnet piece to be glued is a phosphating surface-treated product with a size of 30×24.5×2mm, wherein the 2mm length direction is the orientation direction of the magnet piece. The preparation process is as follows:

[0079] 1. Mix epoxy resin glue and irregularly shaped quartz sand particles evenly to obtain adhesive glue. The particle size D50 of the irregularly shaped quartz sand particles is controlled to be 14 μm, and its mass is 10 wt% of the mass of the epoxy resin glue. Vacuumize and stir in a closed container at a stirring speed of 200 rpm for 1 hour.

[0080] 2. Pour adhesive glue into the rubber cartridge of the glue dispenser, and spray it onto the upper surface of the magnetic sheet through the glue dispenser.

[0081] 3. Superimpose the glued magnetic pieces in sequence. The fourth magnetic piece is not glued, but placed directly on the glued surface of the third magnetic pi...

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Abstract

The invention discloses a magnet assembly and a preparing method thereof. The magnet assembly is formed by overlapping and attaching a plurality of magnetic pieces which are made of a rare earth permanent magnet material. Attaching layers are arranged between the magnetic pieces. The magnet assembly is characterized in that each attaching layer comprises epoxy resin glue and irregular-shaped particles evenly distributed in epoxy resin glue, and the thickness of each attaching layer is 80-200 micron. The preparing method of the magnet assembly includes the steps of glue mixing, glue dispersing,pressurizing, baking and the like. By means of the magnet assembly and the preparing method, by adding the irregular-shaped particles to the attaching layers, the thickness uniformity of the attaching layers is greatly improved, and the performance of the magnet assembly is improved.

Description

technical field [0001] The invention belongs to the technical field of rare earth magnets, and in particular relates to a magnet assembly and a preparation method thereof. Background technique [0002] NdFeB permanent magnets are widely used in industrial motors, automotive motors, wind power, generators and other fields. For permanent magnet motors operating at high speeds, the rotor magnet loss has become a key factor affecting its reliable operation. During high-speed rotation, the eddy current losses generated by the magnets will increase the temperature of the rotor, which will lead to demagnetization of the permanent magnets. In order to reduce the eddy current loss of the magnetic steel, multiple pieces of permanent magnet NdFeB magnetic steel are bonded together to reduce the eddy current loss of the magnetic steel. [0003] NdFeB permanent magnets are generally fixed with glue in a certain order, and under the guarantee of tooling, the NdFeB permanent magnets are g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F7/02H01F1/057H01F41/02C08L63/00C08K3/36
CPCC08K3/36C08L63/00H01F1/057H01F7/02H01F41/02
Inventor 白晓刚王聪翀王浩颉王谚潘广麾
Owner TIANJIN SANHUAN LUCKY NEW MATERIAL CO LTD
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