JPS62193234A - Earth system of electromagnetic apparatus winding - Google Patents

Abstract

PURPOSE:To enable the automatic positioning of an earth connection piece against a laminated iron core by providing the earth connection piece which is electrically connected to the laminated iron core by joining an earth lead wire connected to the insulator of a secondary coil and projected from the side of the secondary coil to the surface of the laminated iron core. CONSTITUTION:An insulating material 22 and an insulator 23 are attached to an outside and an inside, a secondary coil 13 which connects an earth lead wire 13a to an earth connection piece 26 is provided on the central leg of a laminated iron core 15, the earth connection piece 26 is joined to the side 15b of the laminated iron core 15 and the earth connection hole 28 of the earth connection piece 26 is faced to a ribet hole 15c. Accordingly, the earth connection piece 26 is positioned against the laminated iron core 15 at the position which coincides with the ribet hole 15c, the earth connection piece 26 is fixed by inserting a ribet 30 in the ribet hole 15c through the earth connection hole 28 and the earth lead wire 13a and the laminated iron core 15 can electrically be connected. This enables the automatic positioning of the earth connection piece against the laminated iron core.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Field of Application) The present invention relates to a grounding device for electromagnetic equipment windings, and a structure for electrically connecting a ground lead wire of a secondary coil to a laminated core. Regarding.

(Prior Art) Some electromagnetic devices employ a structure in which a winding start lead wire of a secondary coil is connected to an iron core as a ground lead wire to be grounded. - As shown in FIGS. 6 and 7, this electric appliance, for example, a microwave oven transformer, has a primary coil 1, a secondary coil 2, a bus core 3, etc. fitted on the outside of the central leg of a laminated iron core 4. has been done. The laminated core 4 includes an E-type laminated core 5 and an I-type laminated core 6 joined to the E-type laminated core 5.
and an E-type laminated core 5 and an I-type laminated core 6.
The outer side of the circle of the joint with
, b) are bonded and fixed, and [shaped laminated bolt core 5
Approximately the center of the side opposite to the side to which the I-type laminated core 6 is welded along the lamination direction (weld part C), and
Welding (
Welds d, e) are made.

Then, the ground lead wire 2 is the beginning of winding of the secondary coil 2.
In order to electrically connect a to the laminated core 4, the drawer a2
After wrapping and soldering the earth connection piece 8 around the earth connection piece 8, connect the earth connection hole 8a of the earth connection piece 8 to the laminated iron core 40gI.
By driving a rivet 9 into the rivet hole 4a, which is aligned with the rivet hole 4a provided on the outside in the layer direction, the ground lead wire 2a is connected to the laminated core 4 via the ground connection piece 8 and the rivet 9. electrically connected.

(Problems to be Solved by the Invention) In the conventional grounding device for electric wire PI windings, when connecting the ground connection piece to the laminated core, the ground connection hole of the ground connection piece must be aligned with the rivet hole of the laminated core. Since the rivets are driven in using the rivets, it is difficult to automatically position and match the ground connection hole of the ground connection piece and the rivet hole of the laminated core using an automatic assembly machine, etc., and therefore manual labor is required. There was a problem that required it.

The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a grounding device for an electromagnetic device winding that can automatically position a ground connection with respect to a laminated core.

[Structure of the invention]

(Means for Solving the Problems) A grounding device for an electromagnetic device winding according to the present invention has a primary coil and a secondary coil, and a ground lead wire of the secondary coil is connected to a laminated core to which both coils are attached. In the electromagnetic device winding to be connected, a ground lead wire is connected to the insulator of the secondary coil, and also protrudes from the side of the secondary coil and is bonded to the surface of the GI layer core to be electrically connected to the laminated core. A ground connection is installed.

(Function) In the lightning l1t1 device winding grounding device of the present invention, by attaching the secondary coil to the laminated core, the ground connection piece attached to the insulator of the secondary coil is positioned with respect to the laminated core. It is also bonded to the surface of the laminated core for electrical connection.

(Example) Hereinafter, the configuration of an example of the present invention will be described with reference to the drawings.

In FIGS. 1 and 3, 11 is a transformer, and the transformer 11 has a primary coil 12, a secondary coil 13, a bus core 14, etc. fitted to the outside of the central leg of the laminated iron core 15.

The primary coil 12 and the secondary coil 13 are each surrounded by insulating paper 16, 16, and the outer surface of the primary coil 12 is provided with terminals to which the winding start and winding ends of the primary coil 12 are connected. 17.17 is provided, and a terminal 18 is provided on the outer surface of the secondary coil 13 to which the end of the winding of the secondary coil 13 is connected.
A ground lead wire 13a at the beginning of winding is drawn out from the innermost layer of No.3.

The VI layer core 15 is composed of an E-type laminated core 19 and an R-type laminated core 20 joined to the E-type laminated core 19,
Both joints of the E-type laminated core 19 and the L-type laminated core 20 are welded along the VI layer direction (weld parts a, b) and fixed, and the I-type of the E-type laminated core 19 is fixed. Approximately the center of the side surface 15a opposite to the side surface to which the laminated core 20 is joined is welded (welded portion C) along the lamination direction. In addition, mounting metal fittings 21 are fixed to the lower surface of the FI layer core 15 by welding (welding portions d and e) to both corners of the lower end of the GI layer core 15 along the stacking direction.

Further, on the outside of the primary coil 12 and secondary coil 13 attached to the laminated core 15, insulating materials 22 and 22 interposed between the side legs of the laminated core 15 are folded and attached to surround the primary coil 12 and the secondary coil 13. An insulator 23 (the insulator of the primary coil 12 is not shown) is attached to the inside of the coil 12 and the secondary coil 13 and interposed between the center leg of the TAS core 15.

The insulator 23 of the secondary coil 13 is, as shown in FIG.
It is folded into a rectangular shape along the inner shape of the secondary coil 13, that is, the outer shape of the central leg of the laminated core 15, and the other end piece 25 is stacked on the outside of one end piece 24.

Further, on the outside of one end piece 24 of this insulator 23, a ground connection piece 2G is provided on both sides protrudingly.
The tip of this ground connection piece 26 protrudes laterally from the side of the insulator 23 and the secondary coil 13, and extends to one side surface 151 of the g1 layer core 15 in the stacking direction.
(as shown in FIGS. 1 and 3), a ground connection hole 28 is formed at the edge of the tip, and a leader wire fixing piece 29 is cut and formed at the rear of the ground connection hole 28. There is. Then, the lead wire fixing piece 2 of the grounding connection piece 26
A grounding lead wire 13a is attached to the terminal 9 and connected and fixed by soldering or welding, and a grounding connection piece 26 is attached to a rivet hole 15c provided on the side surface 15b of the laminated iron core 15 corresponding to the position of the grounding connection hole 28. Rivet 3 through
0 is driven in, and the ground connection piece 26 is connected and fixed to the laminated iron core 15.

Next, the operation of this embodiment will be explained.

By attaching the secondary coil 13 to the center leg of the laminated core 15, which has the insulators 22, 22 and the insulator 23 attached to the outer and inner sides and the ground lead wire 13a connected to the ground connection piece 26, the ground connection piece 26 is joined to the side surface 15b of the laminated iron core 15, and the ground connection hole 28 of the ground connection piece 26 faces the rivet hole 15c. Therefore, the ground connection piece 26 is positioned relative to the laminated core 15 at a position where the ground connection hole 28 coincides with the rivet hole 15C, and the 7-base connection hole 26 is passed through the rivet hole 15c, and the rivet 30 is inserted using an automatic assembly machine or the like. The earth connection piece 26 can be fixed by driving the earth connection piece 26, and the earth lead-out wire 13a and the laminated iron core 15 can be electrically connected.

In the above embodiment, the ground connection piece 26 is connected to the laminated iron core 1.
5, the tip edge of the ground connection piece 26 may be spot welded to the side surface 15b of the fJ layer core 15, and in this case, the rivet 30 is not required. The number of parts can be reduced, and as shown in FIG.
A welding part C in which the tip of the earth connection piece 26 is made to protrude from the side surface 15b to the side surface 15a of the laminated core 15, and the tip of the ground connection piece 26 is welded to the side surface 15a of the laminated core 15 along the lamination direction.
The rivets 30 may also be welded together to connect and fix them to the laminated core 15, and in this case, the rivets 30 are not required.
The number of parts can be reduced, and the rivet driving process or spot welding process can also be reduced.

Further, as shown in FIG. 5, when the secondary coil 13 is wound around a synthetic resin coil bobbin 31 serving as an insulator 23 and attached to the laminated iron core 15, the laminated iron core 15
An earth connection piece 26, which covers the outside of the center leg side of the laminated iron core 15 with an insulating material 32, is attached to the inner surface facing the side surface 15b.

〔Effect of the invention〕

According to the present invention, the ground lead wire is connected to the insulator of the secondary coil, and is also bonded to the surface of the laminated core.
Since we have provided a ground connection that connects electrically to the layered core,
For attaching the secondary coil to the laminated core, the ground connection piece attached to the insulator of the secondary coil can be positioned relative to the laminated core, making it easy to automate the connection between the ground connection piece and the laminated core. be.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an electromagnetic device showing an embodiment of a grounding device for an electromagnetic device winding according to the present invention, and FIG. 2 is a perspective view of the main parts thereof.
FIG. 3 is a partial bottom view of the connected state of the ground connecting piece, FIG. 4 is a partial bottom view of the connected state of the ground connecting piece showing another embodiment of the invention, and FIG. 5 is a partial bottom view of the connected state of the ground connecting piece. FIG. 6 is a perspective view of a main part showing another embodiment, FIG. 6 is a perspective view showing a conventional electric wire t, aiz, and FIG. 7 is a partial side view showing a state in which the grounding connection piece is connected. 12...Primary coil, 13...Secondary coil, 13a...
Earth leader wire, 15... Laminated core, 15c... Rivet hole, 23... Insulator, 26... Earth connection piece, 28...
・Earth connection hole.

Claims (3)

[Claims] (1) In an electromagnetic equipment winding that has a primary coil and a secondary coil and connects the ground lead wire of the secondary coil to the laminated iron core to which both coils are attached, the ground lead wire is connected to the insulator of the secondary coil. A grounding device for a winding of an electromagnetic device, characterized in that a wire is connected thereto, and a grounding connection piece is attached that protrudes from the side surface of the secondary coil, joins to the surface of the laminated core, and electrically connects to the laminated core. (2) The earth connection piece is connected by a rivet fixed to a rivet hole in the laminated iron core whose hole position coincides with the earth connection hole provided in the earth connection piece. Grounding device for electromagnetic equipment windings. (3) A grounding device for an electromagnetic device winding according to claim 1, wherein the grounding connection piece is connected to the laminated core by welding.