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Anisotropic NdFeB composite magnetic stripe, manufacturing method thereof, external-rotor motor, external-rotor electric generator, variable frequency ceiling fan motor and hub type electric generator

An anisotropic NdFeB and manufacturing method technology, which is applied in the manufacture of inductors/transformers/magnets, magnetic circuit shape/style/structure, circuits, etc., can solve the problem of labor-intensive processing and assembly, shortened tire life, easy tire wear, etc. Problems, to achieve the perfect waveform curve, improve comfort, improve the effect of safety

Active Publication Date: 2014-03-12
NANTONG WANBAO IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One of the disadvantages is that the physical load of the cyclist increases
Second, tires are easy to wear and reduce tire life
But its disadvantages are also obvious: 1. Several segment type magnets must be assembled to form a ring magnet; 2. Since it is composed of several tiles, it is more labor-intensive to process and assemble, and the internal real The roundness is poor, and it may need to be ground if necessary; 3. Because it is composed of several tile-shaped magnets, there will be gaps between the disks, so there will be a cogging phenomenon during operation. But it feels not so smooth; 4. The magnet made of ferrite magnet is only 1800 Gauss magnetic force is not enough, so the material properties of other parts must be changed; 5. Because the sintered ferrite magnet is brittle, it may It will shatter, causing the magnet to stick to the hub, and the bicycle may overturn

Method used

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  • Anisotropic NdFeB composite magnetic stripe, manufacturing method thereof, external-rotor motor, external-rotor electric generator, variable frequency ceiling fan motor and hub type electric generator
  • Anisotropic NdFeB composite magnetic stripe, manufacturing method thereof, external-rotor motor, external-rotor electric generator, variable frequency ceiling fan motor and hub type electric generator
  • Anisotropic NdFeB composite magnetic stripe, manufacturing method thereof, external-rotor motor, external-rotor electric generator, variable frequency ceiling fan motor and hub type electric generator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] see figure 1 and figure 2 , the manufacturing method of the anisotropic NdFeB composite magnetic strip comprises the following steps:

[0041] a. Mixing: put NdFeB anisotropic magnetic powder with a mass ratio of 92%, 6% chlorinated polyethylene, 0.9% vulcanizing agent, 0.3% auxiliary vulcanizing agent and 0.8% heat stabilizer into mixing Carry out kneading in machine 1, the time of kneading is 90 minutes, the temperature of kneading is controlled below 70 ℃;

[0042] b. Batch mixing: Pour more than two batches of mixed magnetic powder into the mixing tank 2, and mix in the mixing tank to form the mixed magnetic powder 10;

[0043] c. Spiral extrusion sheeting and orientation: send the mixed magnetic powder mixed in batches to the screw conveyor 3 for extrusion to form the magnetic sheet 4, and then the magnetic sheet 4 is oriented by the orientation magnetic field 6 generated by the permanent magnet 5, and then The oriented magnetic sheet 4 is demagnetized; while e...

Embodiment 2

[0050] The manufacturing process of the heterosquare NdFeB composite magnetic strip is exactly the same as that of Example 1, except that trihydroxypropane trimethacrylate produced by Nanjing Jihua Lubricating Oil Co., Ltd. is used instead of triallyl isocyanurate. The characteristics of the anisotropic NdFeB composite magnetic strip prepared by this method are basically the same as those in Example 1, but the odor of the vulcanized rubber produced is smaller than that in Example 1. When the mixed magnetic powder is sent to the screw conveyor for extrusion, the extruded mixture needs to pass through a flat die head with a width of 400mm and a thickness of 5mmn, so the extruded disk becomes 400x5mm in size. The length is determined by the feeding of the screw machine.

Embodiment 3

[0052] The anisotropic NdFeB composite magnetic strip has a width of 400 mm and a thickness of 5 mm. Remanence (Br): 7.95~8.25 KG; iHc: 8.2~9.2 Oe; (BH)max: 11.7~13.2 MGOe. The manufacturing method is the same as that of the anisotropic NdFeB composite magnetic strip in Example 1, and will not be described in detail.

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Abstract

The invention discloses a manufacturing method of an anisotropic NdFeB composite magnetic stripe. The manufacturing method includes the work procedures of mixing, batch mixing, flaking and orientation through spiral extruding, demagnetizing, roller calendaring, cutting and the like, and CPE is used as magnetic powder composite material. The invention further discloses an external-rotor motor, an external-rotor electric generator, a variable frequency ceiling fan motor and a hub type electric generator. The manufacturing method is high in production efficiency, and the produced anisotropic NdFeB composite magnetic stripe is good in ductility and particularly suitable for the external-rotor motor or the electric generator.

Description

[0001] technical field [0002] The invention relates to a magnetic material used for an externally rotating motor or generator, in particular to an anisotropic neodymium-iron-boron composite magnetic strip and a manufacturing method thereof, an externally rotating motor, an externally transmitting motor, a A frequency conversion ceiling fan motor, a hub type generator. [0003] Background technique [0004] At present, the anisotropic NdFeB composite magnetic powder is only used in the internal rotation motor or generator. In order to meet the needs of the internal rotation motor or generator, the processing of the anisotropic NdFeB composite magnetic powder is to add epoxy resin to the magnetic powder. Ester is used as a binder, and then compressed into a ring magnet with a press, and then solidified at a temperature of 150~200 degrees Celsius. During the compression process of the press, an alignment magnetic field must be added, because the coercive force of NdFeB mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/20B22F3/24H02K1/06
CPCB22F5/006B22F2998/10C22C2202/02H01F41/02H01F1/08B22F3/20H01F1/057H01F1/0578H01F41/0266B22F1/00B22F3/18B22F3/16
Inventor 周连明
Owner NANTONG WANBAO IND
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