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Sheet bonding material and magnetic workpiece and preparation method and application thereof

A bonding material and sheet-like technology, which is applied in the direction of film/sheet-like adhesives, magnetic objects, inductors/transformers/magnets, etc., can solve the problem of motor temperature rise, energy loss, and low service life of motor magnets And other issues

Inactive Publication Date: 2019-04-26
ZHEJIANG PANGOOD POWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the continuous improvement and improvement of the new energy industry, the development and application of magnetic material motors has entered a new stage. Since the whole piece of magnetic material magnet steel will generate eddy current internal friction during the high-speed motion of the motor, eddy currents are prone to generate heat, which not only makes the The temperature of the motor rises, causing energy loss, and the magnet steel is easy to demagnetize after the temperature rises, causing the motor to fail to work. In order to solve the above-mentioned problems of low service life and high energy consumption of the motor magnet steel, the magnetic material magnet steel is usually divided into pieces Then glued into a whole magnetic steel
[0003] In the prior art, the magnetic steel is bonded with a mixture of glass beads and a binder after being divided into pieces, but the addition of glass beads reduces the bonding performance of the binder; and the glass beads and the binder are easily mixed unevenly, and the glass beads Air bubbles are often generated during the process of mixing with the adhesive. Applying the mixture of glass beads containing air bubbles and the adhesive to the magnetic material after pressure curing and baking will cause the air bubbles to burst, and many holes will be formed in the bonding gap, which will affect the insulation of the product. In terms of effect and appearance, the mixture of glass beads and binder cannot be guaranteed to be evenly applied to the magnetic material, so that the consistency of the bonding gap cannot be guaranteed after the product is cured and baked, and the glass beads are easy to overlap during pressure curing. It is also easy to break after being squeezed by force, resulting in unsatisfactory insulation effect of the product

Method used

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  • Sheet bonding material and magnetic workpiece and preparation method and application thereof
  • Sheet bonding material and magnetic workpiece and preparation method and application thereof
  • Sheet bonding material and magnetic workpiece and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-7

[0095] In the magnetic workpieces of Examples 1-7, the insulating layer of the sheet-like bonding material is glass fiber woven fabric, and the glue layer is epoxy resin glue. The difference is that the thickness and content of the insulating layer and the glue layer are different. For details, refer to the table 1:

[0096] Table 1

[0097]

[0098]

[0099] The result that utilizes the magnetic workpiece of embodiment 1-7 to test can refer to table 2:

[0100] Table 2

[0101]

Embodiment 8

[0103] In this embodiment, the structure of the magnetic workpiece is the same as in Embodiment 4, except that the thickness of the insulating layer is 0.01 mm.

[0104] The shear strength of the magnetic workpiece of this embodiment is 57.4P / MPa. When the insulation effect of the adhesive layer is tested with a digital multimeter, there is a beeping sound, which shows that the magnetic workpiece is conductive. The main reason is that the thickness of the insulating layer is not enough, and the prepared The adhesive layer is easy to be squeezed out when the workpiece is magnetic, and it is difficult to ensure that the thickness of the adhesive layer is consistent.

Embodiment 9

[0106] In this embodiment, the structure of the magnetic workpiece is the same as in Embodiment 4, except that the content of the glue layer is 60 wt%.

[0107] The shear strength of the magnetic workpiece in this embodiment is 60.4P / MPa, and the insulation effect test result is infinite / no sound. However, because the cost of the glue is relatively high, the content of the glue layer is too high, it is partially extruded during the pressure curing process, and the thickness of the adhesive layer is thick, the consistency of the magnetic properties of the product becomes poor, resulting in a relatively large increase in cost.

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Abstract

The invention provides a sheet bonding material and a magnetic workpiece and a preparation method and application thereof, and relates to the field of magnetic material bonding. The sheet bonding material comprises an insulating layer and glue layers disposed on the two opposite surfaces of the insulating layer. The inventor finds that the sheet bonding material has a simple structure, a uniform thickness, easy control of the thickness of the sheet bonding material, no bubbles and excellent bonding and insulating effects.

Description

technical field [0001] The invention relates to the field of magnetic material bonding, in particular to a sheet-shaped bonding material, a magnetic workpiece, a preparation method and an application thereof. Background technique [0002] With the continuous improvement and improvement of the new energy industry, the development and application of magnetic material motors has entered a new stage. Since the whole piece of magnetic material magnet steel will generate eddy current internal friction during the high-speed motion of the motor, eddy currents are prone to generate heat, which not only makes the The temperature of the motor rises, causing energy loss, and the magnet steel is easy to demagnetize after the temperature rises, causing the motor to fail to work. In order to solve the above-mentioned problems of low service life and high energy consumption of the motor magnet steel, the magnetic material magnet steel is usually divided into pieces And then glued into a who...

Claims

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Application Information

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IPC IPC(8): H01F7/02H01F41/02C09J7/21
CPCC09J7/21C09J2301/124C09J2301/312C09J2400/10C09J2400/123C09J2400/143C09J2400/263C09J2423/046C09J2461/00C09J2463/00C09J2467/006C09J2477/006C09J2479/08H01F7/0215H01F41/0253
Inventor 严建新王智博胡佳俊
Owner ZHEJIANG PANGOOD POWER TECH CO LTD
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