JPS58103111A - Manufacture of wound core type leakage transformer - Google Patents

Abstract

PURPOSE:To permit massproduction with high efficiency and the manufacture of a ultrathin type leakage transformer by a method wherein iron cores applied windings to auxiliary iron cores stacked electromagnetic steel plates rectangularly perforated and leakage iron cores formed in the same way are incorporated between two wound iron cores 2 wound electromagnetic steel plates with the same width. CONSTITUTION:Two wound iron cores 4 are prepared. Two each of auxiliary iron cores 6, 6 and leakage iron cores 7 are held and positioned at the layer faces of the wound iron cores 4 between faced winding laminated faces. The laminated faces and the winding laminated faces of the wound iron cores 4, 4 are connected at right angles. U-shaped holders 8, 8 are engaged with and mounted on the upper and lower faces of the wound iron cores 4, 4, and bent sections 8a, 8a at both ends are locked to each outside winding laminated faces of the wound iron cores 4, 4, and the auxiliary iron cores 6, 6 and the leakage iron cores 7, 7 are held and fixed between two wound iron cores 4, 4 to contrive unitary construction.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a wound core leakage transformer equipped with an auxiliary core.

Conventionally, generally known leakage transformers are made of electromagnetic steel sheets 2'.
- So-called laminated cores were used, which were punched and stacked in E-shaped or U-U shapes.

The most common method for laminating this iron core is to stack steel plates punched into two types of E-shapes in an E-shape and a ■-shape to form a mouth-shape, and stack them in an alternately staggered manner. The core is made by laminating them to the required thickness, and the primary and secondary windings, which were previously wound separately, are assembled into the core.Finally, the leakage core is inserted between the primary and secondary windings. They were integrated together to form a leaky transformer.

In another example, rectangular frame-shaped electromagnetic steel plates with a punched center part are stacked to form an iron core of a desired thickness, and rectangular electromagnetic steel plates are stacked inside the hollow part to form a bar shape, and the iron core is wound with wires. At the same time, rectangular electromagnetic steel plates for leakage were stacked to form a bar and were inserted between the windings to integrate them. In any of the above cases, even if the electromagnetic steel sheets can be punched out mechanically, they must be stacked manually to form the core.1. There were many difficulties in stacking or laminating a complete core, which was a major obstacle in assembly. Even if careful manual correction is required, the voids between each layer due to lamination will have a lower space factor than a machine-wound annular core, and the cross-sectional area of the core will be correspondingly larger. Fundamental defects were unavoidable, such as causing the beat vibration that is most common in iron cores. In addition, it is uneconomical due to loss due to cutting waste associated with punching the steel plate, and it also has disadvantages such as the inability to form the core structure in a shape that takes full advantage of the properties of the electromagnetic steel sheet, compared to a ring-shaped core. The present invention eliminates the above-mentioned conventional drawbacks, is easy to manufacture, and has excellent characteristics. The object of the present invention is to provide a method for manufacturing a wound core leakage transformer that is superior and can be made smaller.

In order to achieve the above-mentioned object, the present invention has an auxiliary core made by laminating strip-shaped electromagnetic steel plates punched between two wound cores each having the same width of electromagnetic steel plates wound therebetween. , attempts to obtain a wound core type leaky transformer by incorporating a similarly formed leaky core.

Hereinafter, details of the present invention will be explained based on embodiments shown in the drawings. As shown in Fig. 1, a steel strip 2 is formed by cutting an electromagnetic steel sheet 1 having a certain thickness into a required width using a slitter, and a tape is wound around a winding shaft 3 as shown in Fig. 2. A wound core 4 is produced by continuously and mechanically winding the steel strip 2 in a tightly wound manner, and then the steel strip 2 is cut into strips as shown in FIG. 3. 6 are laminated by an appropriate method to form a rod-shaped auxiliary core 6 and a leaky core 7.

In this case, the height Ll of the auxiliary core 6 is the same as the height L of the wound core 4. Further, the height Ll of the auxiliary core 6 is made the same as the winding thickness W of the wound core 4.

In addition, the thickness Wl of the auxiliary core 6 is determined so that the relationship between the cross-sectional area w, ×L1 of the auxiliary core 6 and the cross-sectional area WXL of the wound core 4 is determined by the formula %, which is required from electromagnetic theory.
Make auxiliary core 6.

Note that the stacking thickness of the leaky core 7 is determined for each product so that the cross-sectional area allows appropriate leakage of magnetic flux.

Then, 2 pieces of the wound core 4 manufactured in the above manner are dosed, and the two wound iron cores 4, 4 are prepared as shown in FIGS. 4 and 6.
On the layer surface of the wound core 4 between the opposing winding layer surfaces,
Auxiliary core 6,6. Two leaky cores 7 are interposed and arranged,
The laminated surfaces and the winding layered surfaces of the wound cores 4, 4 are joined in a perpendicular manner, and U-shaped clamps 8, 8 are fitted on the upper and lower surfaces of the wound cores 4, 4, and the bent portions aa, sa at both ends are fitted. is locked across each outer winding layered surface of the wound cores 4, 4, and auxiliary cores 6, 6 and leakage cores 7, 7 are interposed and fixed between the two wound cores 4, 4 to achieve integration.

At this time, before interposing and fixing the auxiliary core 6 6 between the two wound cores 4, 4, windings 9, 1, 0 are mechanically applied to the auxiliary core 6 via an insulating material, For example, the winding 9 is the primary wire 1, the wire 1o is the secondary rose ring 4M, and the secondary side tabs 9B, 9b and the secondary side tap 1 are connected respectively.
oa and 1ob are derived.

At this time, since the leaky core 7 is interposed between the primary wire 9 and the secondary wire 10, the magnetic flux generated from the negative wire 9 leaks through the leaky core 7, resulting in so-called leakage transformation. Configure the vessel.

Note that by adjusting the laminated thickness of the leaky core 7, the degree of leakage can be freely changed.

As described above, the method for manufacturing a wound core leakage transformer of the present invention involves cutting a thick electromagnetic steel sheet into a desired width, and then winding the copper strip continuously and mechanically tightly in a ring shape to achieve the desired width. A winding core of the same thickness is made, and separately, an auxiliary core is made by laminating electromagnetic steel sheet pieces cut into strips with the same width as the winding core so that the cross-sectional area is twice that of the winding core. Further, the electromagnetic steel sheet pieces described above are laminated to form a leaky core, and two auxiliary cores and two leaky cores are interposed on the layer surface of the wound core between the layered surfaces of the two wound cores that are opposite to each other. place,
Before joining the winding layered surface and the laminated surface orthogonally and fixing them with clamps, the auxiliary core is wound with wire through an insulating material to form the primary and secondary wire rings. A leaky transformer is obtained by interposing and fixing two auxiliary cores between the wound cores and a leaky core between the primary and secondary wire rings, and the auxiliary core and the leaky core are configured. By making the width of the electromagnetic steel sheet piece and the width of the winding core the same, it is possible to make the auxiliary core and the leakage core by using the same shredded electromagnetic steel sheet, making it possible to mass-produce with extremely high efficiency. By reducing the width of the electromagnetic steel sheet piece, it is possible to create a so-called ultra-thin leaky transformer with an extremely low height, which has great industrial value.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an electromagnetic steel sheet in the method of manufacturing a wound core leakage transformer of the present invention, Fig. 2 is a perspective view of the process of manufacturing the wound core, and Fig. 3 is a perspective view of the auxiliary core and leaky core. 4 is a perspective view of a wound core type leaky transformer obtained by the same method, and FIG. 6 is a sectional view of the same. 1...Electromagnetic steel plate, 2...Steel strip, 3.
... Winding shaft, 4... Winding core, 6...
・Electromagnetic steel plate piece, 6...Auxiliary core, 7...
...Leaking core, 8...Holder, 9,1o...
...winding wire. Name of agent: Patent attorney Toshio Nakao and 1 other base,
Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] A copper strip formed by cutting a thick electromagnetic steel sheet to the required width is continuously and mechanically tightly wound in a ring shape to create a wound core of the required thickness, and the same copper strip as above is used for winding. Make an auxiliary core laminated to a thickness that is twice the cross-sectional area of the core, prepare two wound cores, two auxiliary cores, and two leakage cores, and place the two wound cores facing each other. Between the winding layers, each of the auxiliary cores is wound with an insulating material intervening to form a primary and secondary wire, and the auxiliary core and the above-mentioned secondary and secondary wires are wound between the two wound cores. A method for manufacturing a wound core type leaky transformer, characterized in that a leaky core is interposed between the coil and the wire and fixed by a clamping tool.