JPS58111308A - Shell-type transformer - Google Patents

Abstract

PURPOSE:To obtain a transformer which can be readily assembled, by a method wherein both ends of an I-shaped central iron core wound with a coil are inserted into the central bores of ?-shaped laminated cores, respectively, and I-shaped auxiliary cores are disposed on the end surfaces of the two ?-shaped laminated cores, in the same manner. CONSTITUTION:Both ends of a central iron core 5 are fitted into central bores of ?-shaped laminated cores 1, 2, respectively. Auxiliary iron cores 3, 4 are butted against the upper and lower ends of the cores 1, 2, respectively, to assemble a transformer. The core 5 is wound with a coil 8 constituting primary and secondary windings through an insulating material 7. This transformer is advantageous in cost, since simple punched iron cores having ? and I shapes can be employed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an outer casing type transformer constructed using a laminated iron core of a cross-shaped and an E-shape. They were stacked on top of each other to a predetermined thickness to form a square-shaped core, or E-shaped and E-shaped stacks were stacked and butted together to form a square-shaped core.

This iron core can be obtained by punching, but the stacking requires manual labor and assembly, and gaps tend to form between the E1s, causing an increase in weeping fluid and leakage flux.

In addition, recently, an outer iron type transformer with an Of type core using a wound core of 2gA and one auxiliary core laminated with 1 cedar has been developed, and has been put into practical use. Although the core can be removed, it is necessary to secure the joint between the auxiliary core and the two wound cores with clamps, and due to variations in the strength of the clamps, gears similar to the ElE type layered core,
This method had the disadvantage that it caused a drop. Moreover, since the wound core is more expensive than a general punched core, it is impossible to avoid a rise in manufacturing costs.The present invention eliminates the above-mentioned drawbacks of the conventional method. It is an object of the present invention to provide an inexpensive external iron type transformer that is easy to assemble, generates no slug, no cage flask, and generates little waste. The laminated core has an I-shaped laminated central core, a coil is wound around the central core, and I-shaped laminated auxiliary cores are arranged at both ends of the opening-shaped laminated core.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 3 of the drawings.

1 and 2 are square-shaped laminated cores made by punching out electromagnetic steel plates such as silicon steel plates and laminating them in a predetermined number, and 3 and 4 are I-shaped cores made by punching out electromagnetic steel plates and laminating a predetermined number of them. The auxiliary core 6 can be formed by punching the center hole 60 of the laminated core 1.2 by laminating a predetermined number of sheets punched from electromagnetic steel sheets.

As shown in FIG. 1, these cores are connected to the center holes 6 of the opening-shaped laminated cores 1 and 2 by fitting metal fittings at both ends of the central core 6, and the upper part of the opening-shaped laminated cores 1 and 2 is inserted into the center hole 6 of the opening-shaped laminated cores. Auxiliary core 3 at the end
．． It can be assembled by butting 4 together.

As shown in FIGS. 2 and 3, before the central core 6 is assembled into the square-shaped laminated core 1゜2, the coils 8 constituting the primary and secondary coils are inserted through an insulating material 7, as shown in FIGS. It is wrapped.

As described above, according to the outer iron type transformer of the present invention,
It is possible to use a simple punched iron core in the shape of a square or II as the iron core, which is advantageous in terms of cost.Moreover, the shape of the punching die is simple, so the life of the punching die can be extended. , each core can be easily made into blocks, reducing the number of man-hours in the core and coil assembly process. The inrush current can be reduced and relaxed, and the iron core can be strongly bonded, reducing the generation of whining noise and cage flux.It is extremely superior in terms of performance and quality, and has great industrial value. It is what it is.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an assembled iron core in an embodiment of the outer iron type transformer of the present invention, FIG. 2 is a sectional side view of the same outer iron type transformer, and FIG. 3 is a sectional top view of the same. 1.2...Cuff-shaped laminated core, 3,4...-
...Auxiliary core, 5...Central core, 6...
・Central hole, 7＠・・・Insulation material, 8：Medium・Coil.

Claims (1)

[Claims] Both ends of an E-shaped central core around which a coil is wound through an insulating material are inserted into the center hole of the square-shaped laminated core, and connected, and each end is inserted between the two end faces of the two square-shaped laminated cores. An external iron type transformer with an auxiliary core made of I-cedar.