JPH02178904A - Magnetizing device for high coercive force permanent magnet - Google Patents

Abstract

PURPOSE:To make it possible to obtain a magnetizing device for high coercive force permanent magnet which easily enables saturation magnetization of the permanent magnet with high coercive force by using superconductive material for a magnetizing coil wound around a yoke. CONSTITUTION:A magnetizing coil 2a consisting of superconductive material is wound on a yoke 1 one or more times, and the magnetism is maintained in the circumstances at the temperature at which superconductive conditions occur. Also, it is provided with a heater for heeping the yoke 1 in normal temperature circumstance and a heat insulating material 4 for isolating the yoke 1 from the magnetizing coil 2a and insulating heat. By making the use of the property that the electric resistivity of superconductive material is zero, saturation magnetization of a permanent magnet with a high coercive force can be performed without limiting the currents which flow through the magnetizing coil 2a.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a magnetizing device for a high coercive force permanent magnet, which is an energy key conversion material and is mainly used as a conversion medium between electrical energy and mechanical energy in motors, speakers, etc. .

Conventional technology In recent years, magnetizing devices for high coercive force permanent magnets have been required to be larger in scale and have higher capacity as the coercive force of permanent magnets has improved, and ease of magnetization and stability of saturation magnetization are desired. .

The conventional magnetizing device for the above-mentioned high coercivity permanent magnet will be described below.

FIGS. 2(a) and 2(b) are block diagrams of conventional magnetizing devices for high coercive force permanent magnets, where ] is a yoke made of a magnetic material, 2 is a magnetizing coil made of a normally conductive material, and 1 is connected to the yoke 1.
Wrapped once or multiple times.

Generally, a high coercive force permanent magnet is magnetized using a DC pulse power source.

Problems to be Solved by the Invention However, in the above configuration, the larger the coercive force of the permanent magnet, the larger the scale and the higher capacity of the magnetizing device are required. As a result, the current flowing through the magnetizing coil is limited and saturation magnetization cannot be achieved.

Therefore, the grade of the permanent magnet is lowered, the coercive force is lowered,
The problem was that the shape had to be made large and the characteristics had to be maintained. Further, problems similar to those described above also occur when magnetized with multiple poles or when the shape of a permanent magnet is thick in the direction of the magnetic field.

In view of the above problems, the present invention provides a magnetizing device for a high coercive force permanent magnet that can easily saturately magnetize a high coercive force permanent magnet.

Means for Solving the Problems In order to solve the above problems, a magnetizing device for a high coercivity permanent magnet according to the present invention uses a superconducting abrasive in a magnetizing coil.

Effect of the present invention: By utilizing the property of the superconducting material having an electric resistivity of ○, it is possible to saturate magnetize a high coercive force permanent magnet without restricting the current flowing through the magnetizing coil. .

EXAMPLE Hereinafter, a magnetizing device for a high coercivity permanent magnet according to an example of the present invention will be described with reference to the drawings.

FIGS. 1(a) and 1(b) are block diagrams of a magnetizing device for a high coercivity permanent magnet according to the present invention, in which 1 is a yoke made of magnetic material, 2a is a magnetizing coil made of superconducting material, and is different from the conventional example. Similarly, it is wound around the yoke 1 once or multiple times. Note that the magnetizing coil 2a is kept magnetized in an environment at a temperature where a superconducting state occurs. 3 is a heater for keeping the yoke at room temperature, and 4 is a heat insulating material for separating and insulating the yoke 1 and the magnetizing coil 2a.

As described above, according to this embodiment, by using a superconducting material for the magnetizing coil, saturation magnetization of a high coercive force permanent magnet can be easily achieved.

In the above embodiment, the temperature environment of the yoke was set to room temperature, but in consideration of the temperature dependence of a high coercive force permanent magnet, it may be set to a high temperature environment where a decrease in coercive force is observed.

Effects of the Invention As described in Section 2, the present invention uses a superconducting material for the magnetizing coil material, and by utilizing the property of the material having an electrical resistivity of O, it is possible to saturate magnetize a high coercive force permanent magnet. .

[Brief explanation of the drawing]

FIG. 1(a) is a block diagram of a magnetizing device for a high coercive force permanent magnet in an embodiment of the present invention, FIG. 1(b) is a sectional view thereof, and FIG.
a) is a configuration diagram of a conventional magnetizing device for high coercive force permanent magnets,
(b) is a sectional view thereof. 1...Yoke, 2,2a...Magnetizing coil, 3...Heater, 4...Insulating material.

Claims (1)

[Claims] In a magnetizing device that magnetizes a permanent magnet, it has a yoke made of a magnetic material and a magnetizing coil wound around the yoke.
A magnetizing device for high coercive force permanent magnets that uses superconducting material for the magnetizing coil material.