JPH03235636A - Stator for motor - Google Patents

Abstract

PURPOSE:To shorten assembling time of the stator of motor by forming a section, for containing the joint of a stator winding and a lead wire, at the superposed part at the opposite ends of a layer insulation paper. CONSTITUTION:Sections 10 for independently containing three joints 8 of stator windings 1, 2 and lead wires 3 are provided at superposed parts at the opposite ends of a layer insulation paper stripe 9. Main and auxiliary windings 1, 2 are inserted into a stator core 7, the layer insulation paper 9 is contained between a main winding coil end 1a and an auxiliary winding coil end 2a, and a soldered joint 8 of lead wire is contained in the containing section 10. Furthermore, the coil ends are pressure molded and laced with a binding string thus assembling a stator. According to this method, assembling time of the stator of motor can be shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention mainly relates to a stator for an induction motor, and more particularly to the structure of an insulating section that insulates a connection between a stator winding and a lead wire. .

2. Description of the Related Art In general, the stator of an electric motor mainly consists of an iron core part and a winding part, and this winding part is made up of a stator wire, which is a covered WI wire, and a lead wire connected to the stator wire. There is.

The stator winding and lead wires are usually connected by soldering, welding, crimp terminals, etc., and this connection is covered with a thick tube or multiple wraps of film tube, etc., and connected to the coil end of the stator winding. The binding is fixed with string, etc.

The configuration will be described below with reference to FIGS. 3 to 6.

FIG. 3 shows the wiring of a single-phase induction motor, where 1 is a stator main winding made of coated copper wire, 2 is a stator auxiliary winding, and 3 is a lead wire having a terminal at its tip.

Figure 4 shows the connection between the stator windings 1 and 2 and the lead wire 3, and 8 shows the state in which the copper wire from which the insulation coating of the windings has been removed and the core wire of the lead wire 3 are twisted. This is a soldered connection. 4 is an insulating tube made by wrapping a film 3 to 5 times and welding the ends to cover the connection part. FIG. 5 is a cross-sectional front view of the stator, where 1a is the main winding coil end, 2a is the auxiliary winding coil end, and 5 is the phase gap that insulates the main winding coil end 1a and the auxiliary winding coil end 2a. It is an insulating paper that is divided into 3 or 4 sheets. 4 is the above-mentioned insulating tube, which is embedded between the main winding coil end 1a and the auxiliary winding coil end 2a with the connection part 8 of the stator windings 1, 2 and the lead wire 3 inserted therein; 6 together with both coil ends 1a and 2a.

7 is a stator iron core. FIG. 6 is a plan view of the stator seen from above, and as shown in the figure, connection parts 8 covered with insulating tubes 4 are embedded in three places between the main winding coil end 1a and the auxiliary winding coil end 2a. ing.

A method for assembling the stator constructed as described above will be described below.

Coil end portion 1a of stator main winding 1 and coil end portion 2a of stator auxiliary winding 2 inserted into stator iron core 7
An interphase insulating paper 5 is inserted between them. Then, the insulating coatings on the tips of the stator main winding 1 and the stator main winding A2 are removed, and they are twisted and connected to the tips of the lead wires 3 and soldered. Next, the insulating tube 4 is placed over the connecting portion 8 and embedded between the main winding coil end 1a and the auxiliary winding coil end 2a for fixation. Then, after the entire coil end is pressure-formed, lacing is performed with a binding thread 6 to complete the coil end. The connection portion is embedded and fixed in order to facilitate pressure molding and lacing operations.

Problems to be Solved by the Invention However, with this assembly method, it is especially troublesome to embed the connecting portions 8 covered with the insulating tubes 4 at three locations between the main winding coil end 1a and the auxiliary winding coil end 2a. It took a lot of time and a lot of work time. In particular, in recent years, energy saving has required higher efficiency motors, and the amount of copper in the stator strings 1.2 has also increased, requiring a great deal of labor to embed them. Since the insulating tube 4 uses a film wound three to five times, it is expensive.

The present invention solves the above-mentioned problems, and therefore aims to provide a motor stator that does not require much labor, can shorten assembly time, and has low material costs.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention forms a storage portion for storing the connecting portion between the stator winding and the lead wire in a portion where both ends of a band-shaped interphase insulating paper overlap. It is what it is.

2. Also, overlapping portions of band-shaped interphase insulating paper are formed at a predetermined interval in a bonded portion and a non-bonded portion, and the non-bonded portion is expanded into a cylindrical shape to form a storage portion.

Effect/The present invention has the above-described configuration to form a cylindrical space at the overlapping portion of both ends of the strip-shaped insulating paper, and this space is used as a housing portion for the connection portion, so that the connection portion can be fixed. This eliminates the need for embedding work and reduces the number of parts, resulting in lower material costs.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIGS. 1 and 2. Note that the same numbers are given to the same components as in the conventional example.

In FIG. 1, the overlapping portions 11 at both ends of the band-shaped interphase insulating paper 9 accommodate three connecting portions 8 where the stator windings 1 and 2 and the lead wires 3 are connected so that they can be stored separately. Part 1
0 is formed. This storage section 10 includes an overlapping section 1
1 are joined by welding, adhesion, etc. at a predetermined interval to form a joint part 12 and a non-joint part 13, and the non-joint part 13 is expanded into a cylindrical shape. FIG. 2 shows the assembled state of the winding coil ends la and 2a, and the connection part 8 is connected to the storage part 1o of the interphase insulating paper 9 inserted between the main winding coil end la and the auxiliary winding coil end 2a. It is assembled by inserting. In addition, 3 is a lead wire, 6 is a binding thread, and 7 is a stator core.

〆The operation in the above configuration will be explained.

After the main winding 1 and the auxiliary winding 2 are inserted into the stator core 7, an interphase insulating paper 9 is placed between the main winding coil end 1a and the auxiliary winding coil end 2a, and then soldered. The lead wire connection portion 8 is inserted as it is into the storage portion 10 of the interphase insulating paper 9, and after the coil end is pressure-formed, lacing is performed with the tying string 6 to assemble the stator.

Effects of the Invention As described above, according to the electric motor stator of the embodiment of the present invention,
A storage area is formed in the overlapping part of the interphase insulating paper to store the connecting parts of the lead wires and stator wires, so the lead wire connecting parts, which are done before pressure forming and lacing work, can be used to connect the main winding coil end and the auxiliary winding coil end. Assembling time can be shortened because embedding work for fixing between the winding coil ends is unnecessary. Furthermore, although a plurality of insulating tubes have conventionally been used to insulate the connecting portion, by forming a storage portion for the connecting portion in the interphase insulating paper, the insulating tube can be made unnecessary.

2.Furthermore, interphase insulating paper needs to be overlapped for its purpose, but by forming the storage area using the overlapping part, the material cost is lower than if the storage area was formed outside of the overlapping part. It is possible to save on.

Due to the advantages mentioned above, the cost can be lower than that of conventional electric motor stators.

[Brief explanation of drawings]

Fig. 1 is a perspective view of phase insulating paper of a motor stator according to an embodiment of the present invention, Fig. 2 is a sectional side view of main parts of a motor stator using insulating paper between phases, and Fig. 3 is a single phase induction A schematic diagram of the wiring of the electric motor, Fig. 4 is an enlarged front view of the conventional lead wire connection part, Fig. 5 is a side sectional view of the stator of the motor, and Fig. 6 is a plan view of Fig. 5 viewed from the direction of the arrow. It is. 1...Main winding, 1a...Coil end of main winding, 2...Auxiliary winding, 2a...
Coil end of auxiliary winding, 3...Lead wire, 7
...Stator core, 8...Connection part, 9.
・・・・・・Interphase insulating paper, 10... Storage part, 11
...Overlapping part, 12...Joining part, 1
3...Non-joint part.

Claims (2)

[Claims] (1) A stator for an electric motor in which windings of multiple phases are wound around slots of a stator core, and a band-shaped interphase insulating paper is inserted between the coil ends of these windings over the entire circumference,
A stator for an electric motor, wherein a storage part for storing a connecting part between a stator winding and a lead wire is formed in the overlapping part of both ends of the interphase insulating paper. (2) An overlapping portion of band-shaped interphase insulating paper is formed into a bonded portion and a non-bonded portion with a predetermined interval, and the non-bonded portion is expanded into a cylindrical shape to form a storage portion. Stator of the motor mentioned.