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Permanent magnet generator rotor

A technology for permanent magnet generators and rotors, applied to magnetic circuit rotating parts, manufacturing stator/rotor body, magnetic circuit shape/style/structure, etc., can solve the problem of reducing generator output, increasing reluctance, and reducing the effectiveness of permanent magnets Magnetic flux and other issues, achieve the effect of reducing weight and moment of inertia, convenient installation and disassembly, and reducing the amount of magnets

Inactive Publication Date: 2010-02-03
深圳市煜亚磁性器材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the poor mechanical strength of NdFeB in the past, time-consuming drilling and low yield, these patents (for example, Chinese Patent Publication No. CN2586284, publication date 2003.11. CN201146415, open day 2008.11.05, the title of the invention is "insert type rare earth permanent magnet generator rotor, etc.), most of them adopt the embedding method or the insertion method to install the magnet into the yoke, but this makes a large part of the magnetic force lines be magnetized. The yoke is short-circuited, significantly reducing the effective flux (main flux) of the permanent magnets
In addition, since the magnet and the stator silicon steel sheet are separated by the protective layer of the permanent magnet, especially when the protective layer is a non-magnetic material, the effective air gap between the rotor and the stator increases, the magnetic resistance is increased, and the air gap is reduced. The magnetic flux density in the, which reduces the output of the generator

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] figure 1 This is a cross-sectional view of the structure of Example 1. The tile-shaped permanent magnet 3 and the yoke base 2 made of silicon steel sheets are fixed with stainless steel bolts 16 on the cylindrical yoke 1 made of silicon steel sheets (see Figure 7 ). The magnet 3 has a countersunk hole 9 (see figure 2 ), so that the mounting bolt head sinks into the magnet. There are through holes 8 on the yoke table (see image 3 ) To allow the bolt 16 to pass through. The yoke 1 is mounted on the spokes 5 with the shaft 4 to form the overall rotor. The function of the yoke table is to reduce the self-short circuit of the magnetic field lines, so that more magnetic field lines enter the stator and participate in power generation. In the present invention, the magnetic lines of force start from the N pole of the first magnet, pass through the air gap 11, the stator 12, and then through the air gap 11, enter the S pole of the adjacent permanent magnet, and pass throu...

Embodiment 2

[0028] Stamping silicon steel sheet into Figure 5 shape. After stacking, use axial bolts (not shown) to pierce firmly, so that the yoke base and the cylindrical yoke become one body, which is called the toothed yoke 7. The rest of Embodiment 2 is the same as Embodiment 1.

Embodiment 3

[0030] In the yoke made of laminated silicon steel sheets in Example 1, a 3-15 mm thick ring-shaped iron plate 10 with the same shape as the silicon steel sheet is sandwiched. The position of the iron plate is such that the yoke base is installed The hole 8 coincides with the mounting hole 15 on the iron plate. This is to avoid the difficulty of drilling holes parallel to the surface in the silicon steel sheet stack.

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PUM

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Abstract

The invention discloses a permanent magnet generator rotor which comprises a barrel-shaped magnet yoke, a magnet yoke table, tegular permanent magnets, a wheel spoke and a rotating shaft, wherein thepermanent magnets and the magnet yoke are fastened on the barrel-shaped magnet yoke by non-magnetic stainless steel bolts, the permanent magnets are arranged at the outermost edge of the rotor, and the polarities of the permanent magnets are alternatively arranged along the circumference. The magnet yoke table reduces the magnetic-flux leakage between the adjacent magnets and improves the utilization ratio of the permanent magnets. The rotor has reasonable magnetic circuit design, simple structure, convenient installation and less permanent magnet consumption, and is especially suitable for large-size wind-driven generators with low rotating speeds.

Description

Technical field [0001] The invention relates to a generator rotor, in particular to a permanent magnet generator rotor. Background technique [0002] Since the rotor of the permanent magnet generator does not require an excitation power source, carbon brushes and flow guide rings are omitted, which not only saves the energy consumption of excitation, but also reduces the number of maintenance and prolongs the service life. Therefore, after the invention of the high-performance magnet neodymium iron boron, permanent magnet rotor generators have been used in more and more applications, especially in occasions where the output waveform is not high, such as wind generators. [0003] From the 1990s to the present, more than 20 permanent magnet generator rotors have applied for Chinese patents. Due to the poor mechanical strength of NdFeB, the time-consuming perforation, and the low yield rate, these patents (for example, Chinese Patent Publication No. CN2586284, publication date 2003.1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27H02K1/28H02K15/03
Inventor 陆美娟
Owner 深圳市煜亚磁性器材有限公司
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