JPH041709Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Technical field to which the idea belongs]

This invention relates to the structure of the molded winding that is concentrically wound around the core leg and arranged inside, and particularly relates to the connection position between the coil sections. Since such a winding is limited on the inside by the core leg and on the outside by the outer winding, how can connections between coil sections or lead wires at the end of the winding be made without taking up space or man-hours? becomes a problem.

[Prior art and its problems]

3 and 4 are structural diagrams of a conventional resin molded winding of this type, in which a plurality of spirally wound coil sections 31 are stacked at intervals d, and the surroundings and the The inner winding 33 is formed by integrally molding the interval with resin 32, and is arranged around the core leg 34. In order to reduce the voltage applied between the coil sections and reduce the interval d to make the winding smaller, the coil section 31
The end of the outer diameter winding of the adjacent coil section 31 and the beginning of the inner diameter winding of the adjacent coil section 31 are sequentially connected in a so-called N connection.
Conventionally, this connection was made by connecting lead wire 3 on the inner diameter side.
This is done via 5. Further, the winding end lead wire 36 connected to the winding end end of the lowest coil section 31 is also led out through the resin 32a on the inner diameter side, and the axial end surface of the winding wire 33 is connected to the same wire as the winding start lead wire 37. The terminals 38 are connected to respective terminals 38 protruding from the terminals 38 . Therefore, in order to embed the lead wires 35 and 36, the resin 32a portion is bulged in the direction of the core leg 34. In the above conventional inner winding, each section 3
Since the connection between the coil sections 1 and 1 is made in a narrow space on the inner diameter side of the winding, the workability is poor, and in this method, the coil sections are individually wound one by one and then stacked, and then the lead wire 35 is connected. However, since it must then be placed in an inner mold for resin casting (not shown) and molded, a complicated process is required, which requires more man-hours and is expensive.

[Purpose of invention]

This idea was made in view of the above-mentioned drawbacks of the conventional resin molded winding, and aims to provide a molded winding structure that requires less man-hours.

[Summary of the invention] According to this invention, the above object is achieved by configuring the resin molded winding as follows. That is, in a concentrically arranged inner winding formed by stacking a plurality of coil sections wound around a core leg made of laminated magnetic plates and integrally molded with resin, the lamination direction of the coil sections is A part of the inner diameter side is deformed in the direction of the core legs, and the other part is formed to have a circular cross section, and at least the connection between the coil sections is made within the resin at the outer periphery of the deformed part. It is desirable that the lead wire connected to the end of the winding of the coil section is also formed in this section. In this structure, the connection between the coil sections is made in a wide area around the outer periphery, which greatly improves the work.In addition, the inner mold for casting can not only be used as a winding former for the winding wire, but also can be used as a winding former. A plurality of coil sections can be wound continuously on top, further saving man-hours.

[Example of idea]

Figures 1 and 2 show the magnetic plate 3 of the embodiment of this invention.
4a is a structural diagram of a resin molded winding 1 wound around a core leg 34 formed by laminating 4a, in which a part on the inner diameter side in the lamination direction is deformed in the direction of the core leg 34, and the other part is spirally wound with a circular cross section. A coil section 2 is formed in a shape. A plurality of coil sections 2 are stacked and integrally molded with resin 3 such as epoxy resin. The inner diameter end of the coil section 2 and the outer diameter end of the adjacent coil section 2 are sequentially connected to each other at the outer diameter side 2a of the deformed portion of the coil section 2 via a connecting lead wire 35. The winding end lead wire 36 connected to the winding end of the lowermost coil section 2 is inserted into the resin 3b between the outer periphery 2a of the deformed part of the coil section 2 and the resin outer periphery 3a of this part, which has a circular cross section. is derived through the And the top coil section 2
Similarly to the lead wires 37 connected at the beginning of the winding, they are connected to respective terminals 38 protruding from the end face of the resin molded winding 1. Further, in FIGS. 1 and 2, both the winding start and winding end terminals 38 of the winding 1 are projected from the upper part of the winding, but the winding end terminal may be provided at the lower part of the winding. This method is convenient for connecting the neutral point of star-shaped wires, and in this case, the lead wire 3 at the end of the winding
6 is pulled out at the bottom, the resin 3b only needs to have a space for connecting the connecting lead 35 between the coil sections 2. Therefore, the coil section only needs to be slightly deformed compared to the case where the lead wire 36 is passed through at the end of the winding, and the core leg diameter and winding diameter can be reduced accordingly, contributing to the miniaturization and weight reduction of electric appliances. The coil section 2 may be formed as a so-called continuous winding using an inner mold for molding (not shown) whose outer periphery is the inner diameter side of the resin 3. By doing so, the winding former can be saved, and the connection lead wire 35 and its connection process can also be saved, which is a great effect.

[Effect of the idea]

As is clear from the above explanation, according to this invention, in the resin molded inner winding, a part of the inner diameter side of the coil section is deformed in the direction of the core leg, and the outer periphery of the deformed part and this part are made of resin. By making the connection between the coil sections on the outer periphery, the connection work can be done from outside the coil section where there is a large space, thereby significantly improving work efficiency. Furthermore, since the inner mold for molding can be used as a winding die, each coil section can be wound continuously, and the winding manufacturing process can be significantly shortened.

[Brief explanation of the drawing]

1 and 2 are a cross-sectional plan view and a longitudinal cross-sectional view of the resin molded winding wire according to the embodiment of this invention, and FIG. 3 and FIG. 4 are cross-sectional plan views and longitudinal cross-sectional views of the conventional resin molded winding wire. . DESCRIPTION OF SYMBOLS 1...Resin mold winding, 2...Coil section, 2a...Coil section deformed outer periphery, 3
... Resin, 3b ... Deformed outer peripheral resin, 34 ... Iron core leg, 34a ... Magnetic plate.

Claims (1)

[Scope of utility model registration request] A concentric inner winding formed by stacking a plurality of coil sections wound around a core leg made of laminated magnetic plates and integrally molded with resin, the lamination direction of the coil sections A part of the inner diameter side of the coil section is deformed in the direction of the core leg, and the other part is formed to have a circular cross section, and at least the connection between the coil sections is made within the resin at the outer periphery of the deformed part. Resin molded inner winding.