JPH01185180A - How to form the coil part of a linear motor coil that has no internal connection part - Google Patents

Abstract

PURPOSE:To enable forming a linear motor coil part without an interconnection by using an elliptical or circular drum-shaped bobbin having a spiral stepped face and by line-winding a cable and winding along said stepped face. CONSTITUTION:Left and right bobbins 1, 2 are successively formed on the left and right into a spiral shape, where respectively elliptical stepped faces 1b-1d and 2b-2d are continuous round a central shaft hole 1a, 2a. A shaft 3 is fitted through the central shaft hole 1a, 2a of said left and right bobbins 1, 2 so that stepped faces 1b-1d, 2b-2d face each other, to form an integral bobbin. A winding 4 is wound round said integral bobbin in the manner of commencing to be wound, for example, from the large diameter part 1d of the right bobbin 1 and being successively wound round the stepped faces 1b-1d and further wound along the stepped faces 2b-2d of the left bobbin 2. Then, the shaft 3 is drawn out so that the bobbins 1, 2 are separated and taken out.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method of winding a coil for a linear motor, and more particularly to a method of forming a coil portion of a coil for a linear motor, which enables automation of coil winding.

[Prior Art] A large number of coils for a linear motor for a magnetically levitated vehicle are required for both propulsion S and levitation coils not only in the vehicle but also on the track. These coils must not only be weather resistant, but also have excellent mechanical strength since a large electromagnetic force is applied when a vehicle passes by, and they must also have excellent voltage resistance characteristics since a voltage of approximately 6,000 volts or more must be applied. There is.

These coils for linear motors are formed by winding a rectangular wire or rectangular enameled wire insulated with glass tape or paper tape to form a coil portion, and then impregnating the wire with varnish to form a coil. In addition, for outdoor use, in order to obtain sufficient weather resistance, the entire structure is molded with epoxy resin filled with glass fibers and subjected to insulation treatment.

In this way, in conventional coils, one conductor, for example, two
The coil part is formed by winding 0 turns (10 stages x 2 layers), but to make this, first wind the cable and winding wire to make a 1-layer coil part, and then combine the two to form a 2-layer coil part. The layered coil portion is formed by welding and connecting the cables and windings between the layers.

[Problems to be solved by the invention] By the way, as mentioned above, there is always one cable and winding conductor connection part in the middle of the coil part.
This connection is exposed to high temperatures for welding and
It is necessary to perform complete insulation treatment. This is a major obstacle to the automation of manufacturing coils for near motors.

The present invention has been made in view of these points, and an object of the present invention is to provide a method for producing a two-layer winding near motor coil without a connecting portion in the middle. Furthermore, by eliminating any intermediate connecting portions, it is possible to make the coil winding extremely advantageous for automation of manufacturing.

[Means and effects for solving the problem] In this invention, an elliptical or circular drum-shaped winding frame having a spiral stepped surface is used, and the cable and the winding are wire-wound along the stepped surface. This makes it possible to form a linear motor coil portion without an intermediate connection portion.

After the wire winding is completed, this hourglass-shaped winding frame can be divided into two parts and easily removed. The removed cable and winding are pressed in parallel from both sides to form a two-layered flat coil section.

[Example] The present invention will be described in detail below based on one drawing. Second
Figures (A) and (B) are front and side views showing the right winding frame of the linear motor coil, and Figures 2 (C) and (D) are
It is a front view and a side view which show a left winding frame. i.e. left,
The right winding frames 1, 2 have elliptical stepped surfaces 1b, lc, ld and 2b, 2c around the center shaft holes 1a, 2a, respectively.
, 2d are sequentially formed in a continuous spiral on the left and right sides. As shown in FIG. 1, the left and right winding frames 1 and 2 are formed into an integrated winding frame by inserting the shafts 3 into the respective center shaft holes 1a and 2a so that the stepped surfaces face each other. .

For example, the winding 4 is attached to the large diameter portion 1 on the right winding frame.
Start winding from d, wind the open stepped surfaces 1b, lc, and ld, and then continue to wind the stepped surfaces 2b, 2 of the left winding frame 2.
c and finally wind it along the large diameter portion 2d. Next, the left and right oval drum-shaped winding frames 1 and 2 are separated into two parts by removing the shaft 3, and taken out as left and right parts, respectively. The cable and winding 4 wound in an oval shape are pressed in parallel from both left and right sides to form a linear motor coil portion having a two-layer, eight-turn configuration. In the above example, an eight-turn coil was described, but it goes without saying that a coil portion having a plurality of turns can be formed using a winding frame having a plurality of stepped surfaces. Further, although an example in which an elliptical coil is formed has been described, the coil may be circular.

Therefore, a coil portion for a linear motor having a two-layer, multi-turn structure without a connecting portion at the transition between the first layer and the second layer can be easily formed.

Next, the coil portion thus formed is placed in a mold, filled with an insulator, and integrally molded to form the linear motor coil 5 shown in FIG. 3. In addition, code 6
indicates power supply terminals connected to both ends of the cable and winding 4.

[Effects of the Invention] As explained above, since the coil formed by the method for forming the coil portion of the linear motor coil of the present invention has no intermediate connection portion, no special insulation treatment is required for that portion. becomes. Therefore, the conductor connection and insulation treatment steps can be eliminated, making automation of coil winding extremely advantageous.

[Brief explanation of the drawing]

1(A) and (B) are front and side views of an oval drum-shaped winding frame applied to the method of forming a coil portion according to an embodiment of the present invention; FIGS. 2(A), (B), and (C) are ) and (D) are a front view and a side view respectively showing the left and right winding frames of the oval drum-shaped winding frame. FIG. 3 is a front view of the linear motor coil. 1.2...Spiral stepped oval drum-shaped winding frame 3...Shaft 4...Cable or winding

Claims (1)

[Claims] By using a spiral stepped oval drum-shaped winding frame that can be separated into two at the center and winding two layers of coils with a single cable or winding, a two-layer multi-turn structure with no connection at the transition between layers can be created. A method for forming a coil portion of a linear motor coil having no internal connection portion, the method comprising forming a coil portion.