JPS5820220B2 - Electric casing - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention comprises a magnetic pole and an excitation winding formed from individual windings belonging to the magnetic pole and arranged to match the inner diameter of the pole casing. The present invention also relates to an electric machine polar casing, in which the individual turns of the excitation winding are insulated from one another by insulating strips.

Electromechanical monthly housings are already known in which the windings are wound on an insulating winding support and covered with plastic.

A winding support holds the windings in shape and insulates them from the pole casing and pole piece, and a plastic coating applied to each winding holds the windings in place.

Such pole casings always have the disadvantage that the plastic sheathing can break or soften, for example due to vibrations or heat, so that it is no longer capable of providing mechanical retention or corrosion protection for the windings, nor is it electrically insulating.

Furthermore, the use of winding supports requires material and manufacturing costs.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an electric machine polar casing in which an excitation winding is embedded in a vibration-proof manner.

Furthermore, it is necessary to arrange the windings with protection against insulation disturbances, such as earth connection and corrosion.

Furthermore, the pole casing is produced simply and in a highly automatic manner and is therefore cheaper to produce than known designs.

In order to solve this problem, the invention provides a pole casing of the type mentioned at the outset, in which each individual winding has a web body made of elastic insulating material applied after its winding, the web body comprising: An individual winding formed as an excitation winding installed in the pole casing in a curved state adapted to the inner diameter of the pole casing is insulated and supported by the pole casing and the magnetic pole, and each individual winding is The parts not surrounded by the web body, the connections between the respective windings and the ends of the windings are surrounded and insulated by an elastic foam material, with the exception of the connection points used for their voltage connection supply; In this case, the elastic foam material is filled into all the hollow spaces remaining in the ring-shaped space between the inner wall of the pole casing and the end face of the pole casing, and the foam material is further packed into the hollow space remaining in the ring-shaped space between the inner wall of the pole casing and the end face of the pole casing. It was designed so that it was also configured as a package.

However, by surrounding the excitation winding with a foam material that fills the hollow space, and by simply protruding only the end portion of the winding for voltage supply from the foam material, the excitation winding can be fixed in a vibration-proof manner. Placed.

Since the excitation winding is embedded in the foam material except at the connection points, erosion and earth connections are prevented.

According to an embodiment of the invention, the sheathing of insulating material is constructed from webs which accommodate or support the excitation winding at a number of locations.

This web body also maintains the shape of the winding and insulates it, and also serves as a spacer that maintains the spacing between the winding and the pole casing and pole piece.

The web body may be made of plastic, rubber, pressboard or paper.

□ It is preferable to use polyurethane as the foam material to fill the intermediate space.

Polyurethane is particularly easy to process.

Furthermore, its elasticity can be adjusted to the required value in each case.

Next, the present invention will be explained in detail using illustrated embodiments.

In the pole casing 1 are two magnetic pole pairs 2, 3 and 4, 5.
is attached, for example, with screws 6.

An excitation winding 8, 9, 10 or 11 is provided on the yoke 7 of each magnetic pole 2-5.

Each excitation winding 8 to 11 consists of a strip of material, the lateral turns being separated from one another by a strip-shaped insulating insert 24.

Each two excitation windings 8, 9 and io, 1i are interconnected via their winding starting ends 12, 13 and 14, 15.

Excitation winding sets 8, 9 and 10, 1 configured in this way
1 are connected in parallel, the winding ends 16 and 17 of the first excitation windings 8, 10 respectively being connected to the lead wire 18.
It is connected to the.

Winding ends 19, 20 of the second excitation windings 9, 11, respectively
are connected to each other and to the connecting body 21.

The bent ends of this connection body 21 form a respective connection point 22 or 23 for a brush (not shown).

The excitation windings 8 to 11, the individual windings of which are insulated from each other by insulating strips 24, are arranged on the yoke 7 at a predetermined distance from the magnetic poles 2 to 5 and the pole casing 1.

In the embodiment of FIGS. 1 to 3, the excitation windings 8 to 11 are supported at a number of points by webs 25 of thermoplastic material, for example polyamide.

The web body 25 connects the pole casing 1 and the excitation winding 8 to
11 and between the excitation windings 8 to 11 and the magnetic poles 2 to 5 and the yoke 7.

Furthermore, the respective winding starting ends 12 to 1 of the excitation windings 8 to 11
5 is insulated and separated from each winding, and is bent and led out from the side of each winding.

The pole casing 1 with the "bare" excitation windings 8 to 11 mounted on the yoke I is filled with a foam material, in particular polyurethane, in the foamed form, i.e. the pole casing 1
All intermediate spaces in the ring chamber in are filled with foam material.

In that case, the outer periphery of the ring chamber is formed by the inner diameter of the pole casing, and the ring chamber diameter is determined by the inner diameters of the magnetic poles 2-5.

Only the lead wire 18 and the connection points 22, 23 still protrude from the foam material.

As a result, the excitation windings 8 to 11 are connected to the winding start ends 12 to 15, the winding end ends 16, 17, 18° 19, and the connection body 2.
1 is embedded in a vibration-resistant manner to prevent corrosion and ground connection.

Furthermore, a winding support is no longer necessary for the excitation windings 8 to 11, which are provided with a coating of insulating material at least in some places.

The use of conventional insulating tapes is eliminated, since the polyurethane foam material embeds the excitation winding in a vibration-proof manner and prevents corrosion and earth connections.

Polyethylene foam materials and polystyrene foam materials are also suitable, particularly in view of their cost.

Thermoplastic foam materials and thermosetting foam materials are also suitable.

Excitation windings 8 to 1 using presspod or paper as an insulator and spacer instead of plastic forming the web body
It can also be used for the storage and support of 1.

A mask consisting of presspods is applied in the form of webs 25 in a manner not shown to the excitation winding and its extensions around this excitation winding.

Instead of the usual seals on the end faces 26, 27 of the pole casing 1, a foamed protruding seal ring 2 is provided.
8.29 can also be used, in which case the sealing ring seals the pole housing 1 with respect to the non-illustrated electromechanical parts assembled together with the pole housing.

Similarly, a foamed molded product is used as the insulation coating 30 of the lead wire 18.

Incidentally, how the pole casing is assembled will be briefly explained with reference to the illustrated embodiment.

The web body 25 is shaped so as to wrap around the individual windings 8 to 11.

The individual windings 8 to 11 arranged to match the shape (inner diameter) of the inner wall of the pole casing 1 are interconnected to form an excitation winding.

That is, the electrical attachment of the excitation winding is performed by assembly.

The magnetic poles 2 to 5 are then inserted into the associated individual windings 8 to 11.

The excitation windings 8 to 11 with the magnetic poles 2 to 5 mounted thereon are then mounted in the pole casing 1.

The magnetic poles 2 to 5 are attached to the pole casing 1 by screws 6.

In this case, the excitation winding is connected to the pole casing 1 by the yokes 7 of the magnetic poles 2 to 5 assigned to it (each individual winding 8 to 11).
held within.

In other words, the installation is "mechanically assembled."

In this way, the inner wall of the casing, the magnetic poles 2 to 5, and the yoke 7
The excitation winding held between the casing 1, the magnetic poles 2 to 5, and the yoke 7 of the magnetic pole by the web body 25,
Supported insulated.

In other words, the magnetic pole windings 8 to 11 themselves do not come into contact with the magnetic pole, the yoke of the magnetic pole, and the inner wall of the casing.

The rough web body 25 compensates for dimensional deviations between the casing, the poles and the windings.

The individual windings 8 to 11, which serve as excitation windings, are formed by winding uninsulated flat wires.

In this case, the lateral windings are insulated from one another, preferably by means of insulation strips inserted between each winding.

However, for the narrow sides of the flat wire, the outermost turns and the innermost turns of each individual winding 8 to 11, only the area surrounded by the web body 25 is insulated.

Therefore, the excitation winding is placed under a bare condition.

The reason for this is that, as described above, the winding main body and the winding connection parts 12 to 15.21 are not insulated.

Furthermore, neither the flat wire itself nor the excitation winding formed from the individual windings 8 to 11 are coated with an insulating layer.

The mounting is installed inside the pole casing 1 as described above.
The bare "excitation windings" are surrounded and insulated by filling with elastic foam material as specified in the claims, whereby the excitation windings 8 to 11 are For the first time, it is insulated to the required extent, with an additional effect of corrosion protection and vibration resistance of the excitation winding in the housing.

In addition to being used as a spacer, the web body 25 is also used to compensate (adjust) dimensional deviations between the magnetic poles 2 to 5 with the excitation windings 8 to 11, the pole casing 1 and the yoke 7.

[Brief explanation of the drawing]

Figure 1 is a longitudinal section showing the pole casing with one half installed and the other half ready for installation; Figure 2 shows the pole casing ready for installation. A cross-sectional view showing the casing taken along the line ■--■ in FIG. 1, and FIG. 3 a route diagram of the excitation winding having insulating material coatings at several locations. 1...Pole casing, 2-5...Magnetic pole, 6...Screw, 8-11...Excitation winding, 12-15... ... Winding start end, 25...
ring pleasure

Claims (1)

[Claims] 1 magnetic poles 2 to 5, 7 and individual windings 8 belonging to the magnetic poles 2 to 5, 7 and arranged to match the inner diameter of the pole casing 1
In an electromechanical monthly casing having excitation windings 8 to 11 formed from . 8 to 11 have a web body 25 made of an elastic insulating material installed after the winding thereof, and the web body 25 is an excitation coil installed in the pole casing 1 in a curved state adapted to the inner diameter of the pole casing 1. The individual windings 8 to 11 formed as windings are insulated and supported by the pole casing 1 and the magnetic poles 2 to 5, 7, and each of the individual windings 8 to 11 is supported by the web body 25. Unencircled parts, connections 12 to 15 between each winding and winding ends 16.17
, 19, 20° 21 are surrounded and insulated by an elastic foam material, with the exception of the connection points 22, 23 used for supplying their voltage connections, the elastic foam material being connected to the inner wall of the pole casing 1 and the magnetic poles. All hollow spaces remaining in the ring-shaped space between the end faces 2 to 5 and 7 are filled with the foamed material, and the foam material is further packed into the packings at the end faces 2, 6, and 27 of the pole casing 1. Pole casing for an electrical machine, characterized in that it is also configured as 28.29.