JPS5935410A - Manufacture of wound core - Google Patents

Abstract

PURPOSE:To prevent deformation of a wound core by a method wherein an amorphous magnetic steel belt is wound, while an electromagnetic steel belt is wound at the outermost periphery, an insulating tape is wound at both inner and outer peripheries and annealed, and then resin is coated and hardened. CONSTITUTION:An amorphous magnetic steel belt 4 is wound through a tension roll 5 with its starting end being fixed to a bobbin 3, and it is then removed out of the bobbing after preventing return thereof by a tape 6. A glass tape 9 is wound to surround both the steel belt 4 and an electromagnetic steel plate 8, and then subjected to predetermined annealing after fixing. Next, resin of high viscosity is coated on the surface of the glass tape 9 using a brush 10 and then heated to be hardened for completion. By so doing, the electromagnetic steel plate serves to hold the strength to prevent changes in the shape, and rigidity can be improved due to both the presence of the glass tape wound at the inner and outer peripheries of a wound core and hardening of the impregnated resin. Thus, the shape will not be changed and magnetic characteristics can be also improved.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a method for manufacturing a wound core used in electromagnetic equipment, etc.
In particular, it relates to a method of manufacturing a wound core using a thin amorphous magnetic material.

[Technical background of the invention]

Generally, grain-oriented silicon steel sheets are often used as the magnetic material for wound cores used in transformers, etc., but in recent years, consideration has been given to using amorphous magnetic materials instead of the grain-oriented silicon steel strips. It's here.

This amorphous magnetic material is characterized by the fact that the manufacturing process of the copper strip is different from that of grain-oriented silicon steel strip, and that the metal is rapidly cooled from a liquid state, and an amorphous state with disordered atomic arrangement is obtained during this rapid cooling. It exhibits excellent magnetic properties with significantly lower iron loss and excitation force than grain-oriented silicon steel strips. However, the thickness of the copper strip made of this amorphous magnetic material cannot be increased to 20 to 50 microns due to manufacturing reasons.

A conventional method for manufacturing a wound core using a copper strip of this amorphous magnetic material will be explained with reference to the drawings.

FIG. 1 is a perspective view showing the state in which a copper strip is wound. Seven flange 1 is attached to the drive shaft of a winder (not shown). A rectangular winding shaft 2 is placed in the center of the flange 1, and the winding frame 3 is set at 72 inches by fitting the winding shaft 2 into the square hole in the center of the winding frame 3 and fixing it with thumbscrews, etc. Fix it.

Next, the steel strip 4 made of amorphous magnetic material is unwound from the unillustrated ancoir 2, and the beginning of the winding of the steel strip 4 is fixed to the winding frame 3 via a tension roll 5 with adhesive tape or the like. Subsequently, the drive shaft of the winder is rotated to wind the cloth to a predetermined thickness, and the end of the winding is temporarily fixed with adhesive tape 6 to produce a wound core 7. This wound core 7 is removed from the 7 flange 1 together with the winding frame 3 and annealed with the winding frame 3 attached.

[Problems with background technology]

However, in this method of manufacturing a wound core, since the steel strip 4 is thin, the rigidity of the wound core 7 formed by winding becomes weak, and when the winding frame 3 is removed from the wound core 7 after annealing, the winding becomes difficult. iron core 7
The shape deforms freely, making it difficult to maintain a predetermined shape as shown in FIG. In particular, since the steel strip 4 itself becomes brittle due to annealing, it is easily damaged during handling, and if the shape of the core is deformed after annealing, the magnetic properties will be adversely affected.

Furthermore, in order to strengthen the rigidity of the wound core using the steel strip 4, if a resin or the like is impregnated and hardened between the wound copper strips 4 after annealing, the magnetic properties will be significantly lowered.

[Purpose of the invention]

The present invention improves the above-mentioned drawbacks, and provides a method for manufacturing a wound core using a copper strip of amorphous magnetic material, which increases rigidity without degrading magnetic properties and can be formed into a predetermined core shape. With the goal.

[Summary of the invention]

The present invention relates to a method for manufacturing a wound core for electromagnetic equipment, which is formed by winding a copper strip made of an amorphous magnetic material, in which an electromagnetic steel strip is wound around the outermost circumference of the steel strip, and the inner and outer circumferences are heat-resistant insulated. The tape is wound and annealed, and a resin is applied to the surface of the heat-resistant insulating tape and hardened. As a result, the heat-resistant insulating tape wound around the core is held in place by the hardening of the applied resin, so that the rigidity of the core does not change significantly. Furthermore, the magnetic properties of the wound core are improved because resin is not impregnated between the wound copper strips.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 3 is a perspective view showing a state in which a steel strip made of an amorphous magnetic material is wound according to an embodiment of the present invention. In this case, a rectangular winding shaft 2 is fitted into a rectangular hole in the center of the reed winding frame 3, and the reed winding frame 3 is fixed to the flange 1 by thumbscrews or the like. First, the beginning of the winding of the steel strip 4 made of amorphous magnetic material is fixed to the winding frame 3 via the tension/four 5 with adhesive tape or the like. Then, the drive shaft of the winder is rotated to wind the film to a predetermined thickness. Next, from above, the beginning of winding of an electromagnetic steel plate 8 such as a grain-oriented silicon steel plate is fixed to the wound steel strip 4 via a tension roll 5 with an adhesive tape 6, wound one to several times, and cut with adhesive tape. After locking the return screw in step 6, remove the reel from the winding frame. Next, a heat-resistant insulating tape, such as glass tape 9, is wrapped and fixed around the wound steel strip 4 and the electromagnetic steel plate 8 as shown in FIG. . Then, as shown in FIG.
The wound core 11 is manufactured by coating with 0 and curing the resin in a curing furnace.

In the wound core constructed in this manner, resin is not impregnated between the wound steel strips 4 of amorphous magnetic material, so deterioration of magnetic properties can be prevented. In addition, since a magnetic steel plate such as a grain-oriented silicon steel strip is wound around the outermost circumference of the wound copper strip, even if the core is removed from the winding frame, the strength of the core is maintained by the magnetic steel plate, so there is no change in shape. It can be prevented. Furthermore, since the glass tape wound around the inner and outer peripheries of the wound core is impregnated with a resin and hardened to hold it, the rigidity of the wound core is improved and deformation can be prevented, resulting in improved magnetic properties.

[Brief explanation of drawings]

Figure 1 is a perspective view showing the state of a conventional magnetic steel strip when it is wound;
FIG. 2 is a perspective view of a conventional wound core, and FIGS. 3 to 5 are perspective views showing a method of manufacturing a wound core according to the present invention. 3... Winding frame 4... Steel strip of amorphous magnetic material 6... Adhesive tape 7, 11... Wound core 8.
...Electromagnetic steel strip 9...Glass tape 10.
...Brush (7317) Representative Patent Attorney Nori Chika Isuke (and 1 others)
Figure 1 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] In a method for manufacturing a wound core for electromagnetic equipment, which is formed by winding a copper strip made of an amorphous magnetic material, an electromagnetic steel strip is wound around the outermost circumference of the steel strip, and the inner and outer circumferences are wrapped with heat-resistant insulating tape. A method for manufacturing a wound core, characterized in that the heat-resistant insulating tape is rolled and annealed, and a resin is applied to the surface of the heat-resistant insulating tape and cured.