KR-102962477-B1 - MAGNETIZING APPARATUS AND METHOD OF PERMANENT MAGNET USING SUPERCONDUCTING MAGNET

KR102962477B1KR 102962477 B1KR102962477 B1KR 102962477B1KR-102962477-B1

Abstract

The present invention relates to a permanent magnet magnetization device using a superconducting magnet, comprising a vacuum chamber having an internal space, a superconducting wire induction coil formed by winding a superconducting wire into a cylindrical shape and provided within the vacuum chamber, and a superconducting bulk magnet disposed inside the superconducting wire induction coil, wherein the superconducting wire induction coil forms a magnetic field by a current applied through cables connected to both ends, and magnetizes a permanent magnet to be magnetized disposed above the vacuum chamber. According to the present invention, a permanent magnet can be magnetized more efficiently using a superconducting magnet.

Inventors

이후담
최경식
민병호
이태규

Assignees

현대자동차주식회사
기아 주식회사

Dates

Publication Date: 20260508
Application Date: 20220204

Claims (13)

Vacuum chamber with an internal space formed; A superconducting wire induction coil provided within the above vacuum chamber and formed by winding a superconducting wire into a cylindrical shape; A superconducting bulk magnet disposed inside the superconducting wire induction coil; and It includes a position control permanent magnet disposed in the lower direction of the vacuum chamber and arranged parallel to the superconducting bulk magnet in a vertical direction, and The above-described superconducting wire induction coil is characterized by forming a magnetic field by a current applied through cables connected to both ends, and The above superconducting bulk magnet is characterized by being levitized by an upward magnetic field formed inside the superconducting wire induction coil, and Characterized by magnetizing a permanent magnet to be magnetized, which is positioned above the vacuum chamber. Permanent magnet magnetization device using a superconducting magnet.
In claim 1, The above vacuum chamber is characterized by having a cooling valve formed therein, wherein the entry and exit of a refrigerant through the cooling valve can be controlled. Permanent magnet magnetization device using a superconducting magnet.
In claim 1, Characterized that the diameter of the superconducting bulk magnet is at least 1 cm smaller than the diameter of the superconducting wire induction coil. Permanent magnet magnetization device using a superconducting magnet.
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In claim 1, A yoke further comprising a yoke disposed outside the vacuum chamber and including an upper portion spaced apart from the upper surface of the vacuum chamber and a side portion spaced apart from the side of the vacuum chamber. Permanent magnet magnetization device using a superconducting magnet.
In claim 5, The above yoke is formed by being divided into a first yoke and a second yoke, and Characterized by the first yoke and the second yoke being combined to block the magnetic field produced by the superconducting bulk magnet. Permanent magnet magnetization device using a superconducting magnet.
In claim 6, The first yoke and the second yoke are characterized by being capable of moving in a direction away from each other. Permanent magnet magnetization device using a superconducting magnet.
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In claim 1, A position control means further comprising a position control means for raising and lowering the above-mentioned permanent magnet for position control, Permanent magnet magnetization device using a superconducting magnet.
A step of cooling the inside of the vacuum chamber of the permanent magnet magnetization device using the superconducting magnet of claim 6; A step of applying current to the superconducting wire induction coil; and A step comprising moving the first yoke and the second yoke in a direction away from each other. Permanent magnet magnetization method using a superconducting magnet.
In claim 10, After the step of applying current to the superconducting wire induction coil, the method further comprises the step of placing a position-controlling permanent magnet in the lower direction of the vacuum chamber to levitize the superconducting bulk magnet upward. Permanent magnet magnetization method using a superconducting magnet.
In claim 10, Prior to the step of moving the first yoke and the second yoke in a direction away from each other, the method further comprises the step of arranging the magnetization target permanent magnet in a vertical direction parallel to the superconducting bulk magnet in the upper direction of the vacuum chamber. Permanent magnet magnetization method using a superconducting magnet.
In claim 10, A step of measuring the magnetic field of the superconducting bulk magnet after applying current to the superconducting wire induction coil; and The method further includes the step of cutting off the current applied to the superconducting wire induction coil when the measured magnetic field of the superconducting bulk magnet satisfies a set magnetic field. Permanent magnet magnetization method using a superconducting magnet.

Description

Magnetizing apparatus and method of permanent magnet using superconducting magnet The present invention relates to an apparatus and method for magnetizing a permanent magnet, and in particular to an apparatus and method for magnetizing using a superconducting magnet. Generally, to magnetize permanent magnets, a capacitor-type magnetization power supply (pulse power supply) is often used, which generates a strong magnetic field by instantaneously discharging the charge stored in a large-capacity capacitor. Alternatively, there is a method of magnetization in a static magnetic field combining a DC power source and an electromagnet, or within a magnetic field of a magnetic circuit composed of powerful magnets. Recently, a method of magnetization using superconducting magnets is being researched and is described in Korean Patent Publication No. 10-2013-0138473, etc. In the case of rare-earth permanent magnets, the coercive force exceeds 30 kOe (Oersteds), so a high magnetic field form of 10 T or more, which is 3 to 4 times greater than the saturation magnetic field, is required. On the other hand, since the magnetic field strength of the magnetic forming device used in conventional permanent magnet manufacturing methods is only 3 to 5 T, it is difficult to magnetize a permanent magnet in a single step, so magnetization is carried out by repeatedly applying a magnetic field through a pulsed magnetic field. This method has the problem that not only is the amount of power consumed for magnetization high, but the process time is also prolonged. In a prior patent, to minimize this, a patent was proposed for a process that can magnetize at once without a pulsed magnetic field when a magnetic force of 10T or more is applied. The matters described in the background technology above are intended to aid in understanding the background of the invention and may include matters that are not prior art already known to those skilled in the art to which this technology belongs. Figure 1 schematically illustrates a permanent magnet magnetization device using a superconducting magnet of the present invention. Figures 2 to 4 sequentially illustrate the magnetization of a superconducting bulk magnet and the state of a permanent magnet. Figures 5 and 6 illustrate the magnetization process using a permanent magnet magnetization device utilizing a superconducting magnet of the present invention. In order to fully understand the present invention, the operational advantages of the present invention, and the objectives achieved by the implementation of the present invention, reference must be made to the accompanying drawings illustrating preferred embodiments of the present invention and the contents described in the accompanying drawings. In describing preferred embodiments of the present invention, known technologies or repetitive descriptions that may unnecessarily obscure the essence of the invention will be shortened or omitted. Figure 1 schematically illustrates a permanent magnet magnetization device using a superconducting magnet of the present invention. Hereinafter, with reference to FIG. 1, a permanent magnet magnetization device and a magnetization method using a superconducting magnet according to an embodiment of the present invention will be described. The present invention relates to an apparatus and method for magnetizing a permanent magnet using a superconducting magnet, wherein the apparatus is installed in the downward direction of a permanent magnet (10) to be magnetized, which is transported by a conveyor belt (C), to magnetize the permanent magnet (10). To this end, it includes a yoke (111, 112), a vacuum chamber (120), a superconducting wire induction coil (130), and a superconducting bulk magnet (140). Superconducting materials can be NdFeB, Ferrite, FeCo, MnBi, AlniCo, etc. The yoke is composed of an upper surface covering the top of the vacuum chamber (120) and a side surface covering the side of the vacuum chamber (120), and accommodates the vacuum chamber (120) inside. That is, the upper surface is spaced apart from the upper surface of the vacuum chamber (120), and the side surface is spaced apart from the side of the vacuum chamber (120). The yoke is intended to block the high magnetic field coming from the superconducting magnet to be described later, and is divided into a first yoke (111) and a second yoke (112), and as shown in FIG. 5, the upper surfaces come into contact with each other before operation to block the superconducting magnet and the permanent magnet (10) to be magnetized. In other words, because the magnetic flux coming from a superconducting magnet is very high, a yoke is required to confine the magnetic flux, and because the magnetic flux coming from the superconducting magnet is not constant, especially because the magnetic flux inside the magnet is non-uniform, the yoke acts as an aperture to allow a constant magnetic flux to come out. As shown in FIG. 1, the first yoke (111) and th