A method for multi-pole magnetization of sintered NdFeB magnets
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 magnet structure report, no search of double-sided bipolar magnetization fixtures, etc.
Active Publication Date: 2016-12-14
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
A method for multi-pole magnetization of sintered NdFeB magnets, characterized in that: a pair of traditional magnetization fixtures are arranged face to face, a shuttle plate is arranged between the pair of magnetization fixtures, the width of the shuttle plate is the same as The width of the pure iron core of each magnetizing fixture is the same, one magnetizing fixture is connected to the positive pole of the power supply, and the other magnetizing fixture is connected to the negative pole of the power supply; put the product to be charged into the shuttle plate made of non-magnetic material and fix it , and then, close a group of pole heads, discharge according to the pulse magnetizing power supply, and magnetize the object to be magnetized, the magnetizing coil is a coil with many layers and few turns in each layer, and the number of turns in each layer and the described The iron core of the magnetizing coil is compatible with the magnetization saturation voltage; a relatively thick copper wire is selected; the iron core material of the magnetizing coil is industrial pure iron, and the material of the magnetizing pole head is pure iron. The invention improves the magnetizing effect of the coil under the premise of ensuring the saturation magnetization of the magnet through the setting of the key parameters of the magnetizing coil and the selection of the material of the magnetizing pole head.
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...
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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