JPS6025208A - electromagnetic core - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention is aimed at minimizing the deterioration of magnetic properties when manufacturing an electromagnetic core entirely using magnetic ribbons, and making the manufacturing process more convenient.
f, (relating to the shielding core.

Conventional IM configurations and their problems Conventional IM configurations (The shielding core is a magnetic ribbon, which is wound around an amorphous alloy core, then annealed and removed, so that the shape of the magnetic core does not deform. The electromagnetic core is supported by metal fittings on the fc.A perspective view and a half-cut sectional view 1 of the electromagnetic core are shown in Fig. 1(A).
Shown in (B). 1 is a magnetic ribbon, Fes+ B15,
5 Sis, s 02, Feya B+5 5i9F
Iron-based materials such as e79 1316 Sis are widely used. However, the magnetic ribbon 1 has a sheet thickness of about 2
o~30μ, and the magnetostriction constant is an extremely large value of 27~30×10. Therefore, significant property deterioration occurred due to the small stress during work.

%, the amount of strain for a given stress increases, causing a serious problem in deterioration of properties during millet production.

Purpose of the Invention The present invention eliminates the drawbacks of the conventional electromagnetic core, minimizes deterioration of magnetic properties due to processing such as winding of magnetic ribbon, resin impregnation, and cutting, and further improves the workability of manufacturing the magnetic core. The overall purpose is to provide a good electromagnetic core.

As a configuration for achieving the invention (l'6), the present invention*, g! A magnetic ribbon having a smaller coefficient of thermal expansion and negative magnetostriction is coated with an insulating inorganic layer having a coefficient of thermal expansion larger than that of the magnetic ribbon.

DESCRIPTION OF THE EMBODIMENTS The following is a description of the embodiments of the present invention as shown in Figures 2(u) and (B) of the drawings.
) and FIG. 3.

1 is a magnetic ribbon, which is a predominantly amorphous alloy ribbon produced by an ultra-quenching method, a silicon-iron alloy ribbon similarly produced by an ultra-quenching method, or a mechanical method, etc. The plate thickness is relatively thin. The thinner the plate thickness is, the thinner the insulating inorganic layer 2 formed on the end face of the magnetic core can be.

Furthermore, if the magnetic ribbon 1 is an amorphous alloy of F, B, s1 threads, such as Fe79B+68is, the magnetostriction of this material is 27X10, and the expansion coefficient is approximately 100X10. Aron ceramic D (alumina type) having a coefficient of thermal expansion of 90.times.10@-7 is used as the inorganic layer 2 formed on the end face of the magnetic core, and then impregnated with resin as necessary.

The magnetic core obtained in this way has a characteristic of 13+o of 1°K.
G or more, the iron loss value at 20 K l (z is about 1710 compared to the conventional one.In addition, the end face of the magnetic ribbon 1 has a 11Q material whose coefficient of thermal expansion is larger than that of the magnetic ribbon 1.
× When using low melting point glass of 10-7′℃, B+o
is almost zero, making it impossible to put it to practical use as a magnetic core, which proves that the effect of this example is remarkable.

When using a 6.5 to 6.7% silicon-iron alloy ribbon as the thin magnetic ribbon 1, this phase is a low-melting glass whose non-expansion coefficient is larger than that of the magnetic ribbon 1 because the magnetostriction is negative. By using , we were able to improve the magnetic properties.

Also, Fig. 2 (A), CB) shows the wound core, but the third
The above principle is similarly applied to a punched laminated core as shown in the figure. However, in this case, the inorganic material 15η is not formed in the abutting portion with the other magnetic core. Note that 1r” layer D:
:, By making the thickness of the inorganic layer 2 formed on the i-plane thicker than the thickness of the magnetic ribbon 1, excellent characteristics can be obtained. Further, the inorganic layer 2 should be an electrically insulating phase so as not to form a short circuit due to a magnetic field.

-1: None (although it has been described that two geometric layers are formed on the end face of the magnetic core, the effect of this embodiment is not lost even if one or more geometric layers are formed on the entire surface of the magnetic core).

Effects of the Invention According to the present invention? Since the magnetic properties are completely prevented from deteriorating during the manufacture of the magnetic core using the AT raw thin ribbon, and the magnetic 1.9 bands are firmly fixed to each other, the fixing of the magnetic core becomes difficult and the manufacturing process 14 (second It has excellent effects on both sides.

4. Simple Explanation of Drawings" Figures 1 (A) and (B) are schematic perspective views and half-cut sectional views of the conventional wound core, and Figures 2 (A) and (B) are of the present invention. Schematic perspective view and half-cut “1” of an electromagnetic core according to an embodiment
1 and 3 are schematic perspective views of laminated magnetic cores showing other embodiments. FIG.

1... (Magnetic ribbon, 2... Inorganic layer.

Claims (1)

[Claims] Value 1! :The laminated end face of the magnetic core formed by lE ribbons is a magnetic thin strip with a thermal expansion coefficient smaller than the thermal expansion coefficient of the magnetic ribbon with a positive magnetostriction. An electromagnetic core coated with an insulating inorganic layer with a coefficient of thermal expansion greater than that of the band.