Permanent magnet magnetization device
A technology of magnetization device and permanent magnet, which is applied in the direction of magnetic objects, circuits, electrical components, etc., and can solve the problem of difficulty in obtaining high magnetization quality.
Active Publication Date: 2012-01-18
MINEBEA CO LTD
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Problems solved by technology
[0007] However, when using this method for actual magnetization, it was found that when preparing the aforementioned annular permanent magnet with a narrow magnetization pitch that is magnetized with multiple poles on an extremely small diameter, although the average surface magnetization of all poles is The flux density peaks are improved to a certain extent, however, the fluctuation between the surface flux density peaks is still significant, making it difficult to obtain high magnetization quality
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Embodiment Construction
[0059] ===First Embodiment===
[0060] figure 1 Shows a magnetizing device according to a first embodiment of the present invention. The magnetizing device 1 includes: a cylindrical heating portion 10 having an inner surface capable of functioning as a heating surface; and a cylindrical magnetizing portion 12 having a of the inner surface. The heating portion 10 and the magnetization portion 12 are independent from each other, and are arranged along the axial direction (direction along the axis). This embodiment employs a vertical arrangement in which the axis extends vertically. Thus, the heating portion 10 and the magnetized portion 12 are arranged vertically, the heating portion 10 is located on the lower side, and the magnetized portion 12 is located on the upper side. The heating portion 10 and the magnetizing portion 12 are supported such that at least one of the portions 10 and 12 can move toward and away from the other. When the heating portion 10 and the magnetiz...
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Abstract
To effectively and rapidly perform intensive magnetization work at a low cost while enhancing the magnetization quality without causing insufficient magnetization even in a case of a ring-shaped permanent magnet having a narrow magnetization pitch such as minute diameter and multiple poles. A permanent magnet magnetization device includes a heating unit (10), a magnetization unit (12) arranged in the axial direction separately from the heating unit (10), and a holding member (22) of an object-to-be-magnetized (20) which can be relatively shifted with respect to the heating unit and the magnetization unit. The object-to-be-magnetized heated by the heating unit is transferred to the magnetization unit so as to be magnetized.
Description
technical field [0001] The invention relates to a device for magnetizing a permanent magnet and a method for magnetizing a permanent magnet. Background technique [0002] Typically, for multi-pole magnetization of a ring-shaped permanent magnet rotor incorporated in, for example, a radial gap type permanent magnet stepping motor, a coil energization type magnetization device is used. Such a magnetizing device, for example, has a structure as follows: The yoke is provided with a magnetized object receiving hole, and an annular permanent magnet—a magnetized object—can be inserted into and from the magnetized object receiving hole. Take out; form a plurality of grooves extending in the axial direction on the inner wall surface of the magnetization object receiving hole; respectively bury insulated and covered wires in the grooves, and connect adjacent insulated and covered wires to form a continuous zigzag coil. In this magnetizing device, magnetization is performed in the fo...
Claims
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IPC IPC(8): H01F13/00
Inventor 幸村治洋北冈干雄大桥郁夫清宫照夫新村佐知子铃木增太郎
Owner MINEBEA CO LTD