Method for multi-pole magnetizing of sintered neodymium-iron-boron magnet
A multi-pole magnetization, NdFeB technology, applied in the direction of magnetic objects, electrical components, circuits, etc., can solve the problems of no double-sided bipolar magnetization fixture found, no double-sided bipolar magnet structure report found, etc.
Active Publication Date: 2012-08-01
SANVAC BEIJING MAGNETICS +1
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Problems solved by technology
[0009] At present, the inventor has not retrieved any patent literature on the double-sided bipolar magnetization fixture, nor found any structural reports on the fixed-mode double-sided bipolar magnet
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[0026] Such as Figure 4-5 As shown, in the double-sided bipolar magnetized magnet fixture according to the present invention, 1, 1 'represents a pure iron core; 3, 3' represents a group of pole heads; 20 represents a copper wire coil; 2, 2' represent respectively The copper wire connecting the negative and positive poles of the power supply; 5 indicates the shuttle board; 6 indicates the product to be magnetized. The magnetizing power supply is connected outside the fixture to generate pulse current, which can make the magnet multi-pole magnetized at one time.
[0027] Put the product 6 to be charged into the shuttle board 5 and fix it. The material of the shuttle board 5 is any machinable material that is not magnetically conductive. The width of the shuttle board 5 is the same as that of the pure iron core 1, 1'. , 3' close together, discharge according to the pulse magnetizing power supply, and magnetize the body 6 to be magnetized, so as to realize multi-pole magnetizati...
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Abstract
The invention relates to a method for multi-pole magnetizing of a sintered neodymium-iron-boron magnet. The method is characterized in that a pair of conventional magnetizing fixtures is arranged face to face, a shuttle plate is arranged between the pair of magnetizing fixtures, the width of each shuttle plate is the same with that of a pure iron core of each magnetizing fixture, one magnetizing fixture is connected with the anode of a power supply, and the other magnetizing fixture is connected with the cathode of the power supply; a to-be-charged product is put into the shuttle plate made of permeability magnetic material and fixed, and then a group of polar heads is combined and a pulse magnetizing power supply discharges to magnetize the to-be-charged magnet, wherein a magnetizing coil have multiple layers and the number of turns of each layer is less, the number of turns of each layer is adapted to the magnetic saturation voltage of the iron core of the magnetizing coil; a relatively thick copper wire is selected; and the iron core of the magnetizing coil is made of industrial pure iron, and the magnetizing polar head is made of pure iron. According to the invention, the magnetizing effect of the coil is improved on the premise of ensuring the saturated magnetizing of the magnet by setting the key parameters of the magnetizing coil and selecting the material of the magnetizing polar heads.
Description
technical field [0001] The invention relates to a method for multi-pole magnetization of sintered NdFeB magnets. Background technique [0002] Multi-pole magnetization is a method of magnetizing two pairs of magnetic poles on the same sintered NdFeB magnet. This method involves many factors and is a relatively complicated professional technology. related to magnetic properties. At present, the method used to magnetize NdFeB magnets is the pulse magnetic field magnetization method. The principle of this magnetization method is to use a large current for instantaneous discharge to generate a pulsed strong magnetic field, thereby magnetizing the permanent magnet. Considering the continuity of magnetization, the time of the pulse leading edge in the magnetization circuit should be shortened as much as possible. [0003] Generally speaking, when magnetizing a permanent magnet, the magnetic field strength the magnet receives should be greater than the HCJ (intrinsic coercive for...
Claims
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IPC IPC(8): H01F13/00
Inventor 赵玉刚张瑾张来树胡伯平饶晓雷
Owner SANVAC BEIJING MAGNETICS