CZ306025B6 - Motor stator - Google Patents

Abstract

In the present invention, there is disclosed a motor stator (100A, 100B) comprising a plurality of stator split cores (66) each being provided with a toothed section, an insulator (7A, 7B) arranged on each of the stator split cores (66), a first electrically-conducting wire (20) arranged on the toothed section of each stator split cores (66) provided with the insulator (7A, 7B), and a second electrically-conducting wire (21) having its first end connected with the first electrically-conducting wire (20). An aluminium wire is used for at least one first electrically-conducting wire (20) or the second electrically-conducting wire (21). The insulator (7A, 7B) is provided with a receiving groove (12A, 12B) for receiving the end connecting section (25) to which the first electrically-conducting wire (20) and the second electrically-conducting wire (21) are connected. The receiving groove (12A, 12B) is covered with a cover (30A, 30B) in a state, in which said end connecting section (25) is received in the receiving groove (12A, 12B).

Description

Engine stator

Field of technology

The invention relates to a stator forming part of a motor used to drive a device such as an air conditioning fan or a sealed compressor.

Prior art

The design of stators in brushless motors has changed widely in recent years.

For example, an arrangement is described (see for example patent literature 1) in which "the insulator 1 is integrally formed with the stator core 2, then the end pin 7 is inserted and pressed into the press-fit hole 8 in the protruding part 3, whereby the connecting end part 7b are and the end connecting portion 7 and the winding wire are formed over the protruding portion 3 as a range, and then the winding wire 4 is wound.

The winding process is completed by winding the winding wire end 5, which is the initial winding portion of the winding wire 4, from the end face side of the end connecting portion 7a and the winding wire at the end pin 7 in the axially projecting portion 3, the winding wire end 5 being arranged in groove portion 6, connecting the winding wire 4 by soldering, and bending and seating the end connecting portion 7a of the winding wire to the groove portion 6.

In this, the connecting portion 10 is formed by fixing the protrusion 9b of the protective member 9 to the recessed portion 3a so that the side of the end connecting portion 7 and the winding wire of the protruding portion 3 is covered by the protective member 9, and then attaching the protective member 9 by ultrasonic welding.

Therefore, the end connecting portion 7 and the winding wire are prevented from being exposed, and since the axial length of the connecting portion 10 is reduced, moisture, such as water droplets, is prevented from the end connecting portion of the winding wire.

An arrangement has also been described (see, for example, patent literature 2), in which the connecting part 11 for the side plates and the receiving part 10 form a receiving space 13 for the terminal 7 around the terminal 7, which is open to the upper side.

Reference numeral 14 denotes a refractory and insulating resin layer which is poured into the storage space 13 from the upper side, surrounds the connecting member 9 and the terminal 1, and is cured.

In this description, Patent Document 1, which is Japanese Published Patent Application 10-201 160 (page 11, Fig. 1, Fig. 2, etc.), and Patent Document 2, which is Japanese Published Utility Model Application 61, are cited as patent literature. -205 250 (page 6, Fig. 2, Fig. 4, etc.).

The technical problem is as follows.

- 1 CZ 306025 B6

Although copper wires are often used as electrically conductive wires, such as winding wire, lead wire, and zero point connecting wire, the frequency of using aluminum wires for electrically conductive wires is increased to further reduce costs.

However, if aluminum wires are used for electrically conductive wires, the following must be taken into account.

The methods used to connect copper wires in connection with electrically conductive wires include methods that can increase the resistance of the connecting portion and thereby impair reliability.

Such methods may include, for example, a method of joining by pressing an aluminum electrically conductive wire onto a U-shaped copper terminal.

Since copper and aluminum have different coefficients of linear expansion, a gap is formed between the U-shaped copper terminal and the aluminum electrically conductive wire in an environment in which the temperature changes repeatedly, as a result of which reliability may be impaired.

Also in the case of an engine stored in a sealed container used for the cooling circuit, appropriate measures against contamination or contamination must be taken into account.

In addition, in the case of the engine used in the atmosphere, the aluminum wire has a low corrosion resistance, as a result of which it can corrode even with a small amount of moisture.

If the corrosion continues, it may lead to a connection failure.

This means that a connection method suitable for aluminum wire must be considered, as well as appropriate measures against contamination, contamination and moisture when using aluminum.

The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a motor stator with high reliability while reducing costs by using aluminum wire for at least one of the electrically conductive wires.

The essence of the invention

The solution to the problem is as follows.

According to the present invention, a motor stator has been developed that includes:

a plurality of stator split cores, each of which is provided with a toothed portion, an insulator arranged on each of the stator split cores, a first electrically conductive wire arranged on the toothed portion of each of the stator split cores provided with an insulator, and a second electrically conductive wire having a first end it is connected to a first electrically conductive wire, wherein an aluminum wire is used for at least one first electrically conductive wire or a second electrically conductive wire.

The insulator is provided with a receiving groove for accommodating an end connecting portion to which the first electrically conductive wire and the second electrically conductive wire are connected.

The receiving groove is covered by the cover in a state where the end connecting portion is received in the receiving groove.

The end connecting part is preferably formed by cold pressure welding.

-2GB 306025 B6

The upper side of the receiving groove formed on the outside of the end face of the insulator is preferably open.

The outer peripheral side of the receiving groove formed on the outer side of the end face of the insulator is preferably open.

If the end connecting portion is accommodated in the receiving groove formed on the outside of the end face of the insulator so that the upper side of the receiving groove is open, the end connecting portion is accommodated in the receiving groove in a state in which the end side of the first electrically conductive wire and the end side of the electrically conductive wire are pressed on the parts different from the end connecting part and are deformed.

The insulator and the cover are preferably made of a single resin material.

The housing is preferably arranged on each stator split core or on each plurality of stator split cores.

The advantageous effects of the invention are as follows.

In the case of the motor stator according to the present invention, since aluminum wire is used for at least one of the electrically conductive wires, cost reduction can be achieved.

Since the end connecting part is also accommodated in the receiving groove, and the receiving groove is covered by the cover, reliability can be increased.

Explanation of drawings

The invention will be further elucidated on the basis of examples of its embodiment, the description of which will be given with reference to the accompanying drawings.

Giant. 1 is a schematic diagram for explaining the process structure of an electrically conductive wire connection at a motor stator according to Embodiment 1 of the present invention.

Giant. 2 is a schematic right side view showing the state of the stator of the motor according to Embodiment 1 of the present invention shown in FIG. 1, as viewed from the right side of a sheet of paper.

Giant. 3 shows a schematic flow diagram of a manufacturing process for explaining the process steps of connecting electrically conductive wires at a motor stator according to Embodiment 1 of the present invention.

Giant. 4 is a schematic diagram for explaining the process structure of an electrically conductive wire connection at a motor stator according to Embodiment 2 of the present invention.

Giant. 5 is a schematic diagram for schematically illustrating an arrangement of an area near an insulator groove at a motor stator according to Embodiment 2 of the present invention, as shown in FIG. 4.

Giant. 6 is a schematic illustration for a schematic illustration of an arrangement of an area near a mounting groove of a cover at an insulator at a motor stator according to Embodiment 2 of the present invention, as shown in FIG.

Giant. 7 is a schematic illustration for a schematic illustration of an assembled state of a stator split core and an insulator at a motor stator according to Embodiment 2 of the present invention, as shown in FIG. 4.

-3 CZ 306025 B6

Giant. 8 is a schematic sectional view showing an example of an arrangement of a compressor which is one of the rotary machines according to Embodiment 3 of the present invention.

Examples of embodiments of the invention

Embodiments 1 to 3 of the present invention will now be further described with reference to the drawings.

It should be noted that the relationship between the dimensions of the components in the following drawings, including Fig. 1, may differ from the relationship between the dimensions of the actual components.

It is also believed that the components designated by the same reference numerals used in the following drawings, including FIG. 1, represent the same components or corresponding components.

This is quite common throughout the description.

In addition, the shapes of the components used throughout the description are exemplary only and are not intended to limit the description to these examples.

Embodiment 1

Giant. 1 is a schematic diagram for explaining a process structure of a conductive electric wire connection to a motor stator according to Embodiment 1 of the present invention (hereinafter referred to as stator 100A only).

Giant. 2 is a schematic right side view showing the state of the stator 100A of FIG. 1 when viewed from the right side in the plane of a sheet of paper.

Giant. 3 shows a schematic view of a manufacturing process explaining the process steps of connecting the conductive electric wire of the stator 100A.

The process structure of connecting the conductive electric wire of the stator 100A is described with reference to Figs. 1 to 3.

Giant. 1 and 3 schematically illustrate the state of one stator split core 66 of a plurality of split cores arranged in an annular shape when viewed from the outer peripheral side.

The stator 100A is assembled with a rotor which uses, for example, a permanent magnet, as a result of which a brushless DC motor (synchronous motor) is formed.

The stator 100A is also used for a rotary electrical device for three-phase (UVW-phase) alternating current, for example for a fan mounted in an air-conditioning device which is a heat pump or a compressor which is part of the heat pump.

As shown in Fig. 1, the stator 100A includes a plurality of stator split cores 66 arranged in an annular shape, and an insulator 7A, which is an insulating member disposed on each stator split core 66.

Each of the stator split cores 66 has a toothed portion that projects toward the axis.

The first electrically conductive wire (winding wire) 20 is wound in a concentrated manner around the toothed portion by means of a film-shaped insulating strip or an insulating member which is formed by a resin together with an insulator 7A.

-4GB 306025 B6

One end of the second electrically conductive wire (lead wire) 21 is connected to the terminal (winding end portion) of the first electrically conductive wire 20.

The other end of the second electrically conductive wire 21 is connected to a power supply.

The stator 100A, which is formed by arranging a plurality of stator split cores 66 with electrical wires wound in an annular shape, is mounted, for example, in the resin and on the inside of the sealed container.

As shown in Figs. 1 to 3, the insulator 7A is arranged on at least one of the two end faces in the direction of the axis of rotation of the rotor at the stator split core 66.

The insulator 7A has an inner wall on the inner circumference side and an outer wall on the outer circumference side in the radial direction for holding the first electrically conductive wire 20 and the second electrically conductive wire 2L.

The insulator 7A is provided with a receiving groove 12A. The receiving groove 12A is formed on the outside of the end face (outer wall) of the insulator 7A so that the upper side of the receiving groove 12A is open.

The receiving groove 12A serves to accommodate a cold pressure welded end connector 25, as will be described below.

Insulator 7A is made of resin.

As also shown in Fig. 1 and Fig. 3, the insulator 7A has a guide groove 13A of the electrically conductive wire and a mounting groove 14A of the cover.

The guide grooves 13A of the electrically conductive wire are formed on at least a part of the upper end portion on the outside of the end surface of the insulator 7A.

The guide grooves 13A of the electrically conductive wire serve to accommodate a part of the first electrically conductive wire 20 and a part of the second electrically conductive wire 21.

The fixing grooves 14A of the cover are formed on both sides in the annular direction of the insulator 7A (on the left and right sides of the sheet in Fig. 1).

The mounting grooves 14A of the housing have the function of their jaws 31A of the housing 30A, which will be described below.

First, a part of the first electrically conductive wire 20 and a part of the second electrically conductive wire 21 are arranged on the insulator 7A.

In this case, the first electrically conductive wire 20 is described as a winding wire, and the second electrically conductive wire 21 is described as a supply line wire.

However, the following alternatives are possible.

The first electrically conductive wire 20 may be a lead wire, and the second electrically conductive wire 21 may be a winding wire.

The first electrically conductive wire 20 may be a winding wire, while the second electrically conductive wire 21 may also be a winding wire.

The first electrically conductive wire 20 may be a winding wire, and the second electrically conductive wire 21 may be a zero point connecting wire.

-5GB 306025 B6

The first electrically conductive wire 20 may be a zero point connecting wire, while the second electrically conductive wire 21 may be a winding wire.

The first electrically conductive wire 20 and the second electrically conductive wire 21 are connected, for example, by cold pressure welding.

The part in which the first electrically conductive wire 20 and the second electrically conductive wire 21 are joined by cold pressure welding is called a cold welded end connecting portion 25.

A portion of the first electrically conductive wire 20 and a portion of the second electrically conductive wire 21 are received in the guide grooves 13A of the electrically conductive wire, and the cold pressure welded end connecting portion 25 is received in the receiving groove 12A, and a portion of the first electrically conductive wire 20 conductive wire 21 are arranged on the insulator 7A.

At least one of either the first electrically conductive wire 20 or the second electrically conductive wire 21 is formed of aluminum wire.

The insulating coating of the electrically conductive wire is usually removed when cold pressure welding is performed.

However, the removal or non-removal of the insulating coatings can be arbitrarily performed when performing cold pressure welding on the first electrically conductive wire 20 and the second electrically conductive wire 21.

Cold pressure welding involves pressing and deforming metallic materials (in this case the metallic materials forming the first electrically conductive wire 20 and the second electrically conductive wire 21) and then atomically joining the two metals.

A portion of the first electrically conductive wire 20 and a portion of the second electrically conductive wire 21 near the cold pressure welded end connector 25 are deformed to optimal shapes so that the cold welded end connector 25 can be received in the receiving groove 12A and can be the excess lengths of the first electrically conductive wire 20 and the second electrically conductive wire 21 are absorbed.

That is, the first electrically conductive wire 20 and the second electrically conductive wire 21 are deformed so as to be bent into a V-shape, and a portion of the first electrically conductive wire 20 and a portion of the second electrically conductive wire 21 include a cold-welded end connector 25. at the bottom on a sheet of paper.

First, as shown in Fig. 3 (a), a first electrically conductive wire 20 and a second electrically conductive wire 21 are provided, comprising a cold-welded end-connecting portion 25, and a stator split core 66 arranged with an insulator 7A.

Then, as shown in Fig. 3 (b), a part of the first electrically conductive wire 20 and a part of the second electrically conductive wire 21, including the cold-welded end connecting portion 25, are accommodated in electrically conductive wire guide grooves 13A formed on the insulator. 7A.

Then, as shown in Fig. 3 (c), by using the clamping means 51, the first electrically conductive wire 20 and the second electrically conductive wire 21 are compressed so that the first electrically conductive wire 20 and the second electrically conductive wire 21 are held so that they cannot be lifted, and the first electrically conductive wire 20 and the second electrically conductive wire 21 are movable in the length direction of the electrically conductive wire.

-6GB 306025 B6

Also, as shown in Fig. 3 (c), by using the jig 50, a portion of the first electrically conductive wire 20 and a portion of the second electrically conductive wire 21 near the terminals are compressed, and the cold pressure welded end connector 25 is not compressed.

The clamping jig 50 has a hollow portion at the distal end (at the distal end at the underside of the sheet of paper of Fig. 3 (c)).

The clamping jig 50 can thus press a part of the first electrically conductive wire 20 and a part of the second electrically conductive wire 21 in the vicinity of the terminals, while the cold-welded end connecting part 25 is not pressed.

According to Fig. 3 (c), the amount of pressing of the clamping jig 50 is set depending on the absorption of excessive lengths of the first electrically conductive wire 20 and the second electrically conductive wire 21, wherein the first electrically conductive wire 20 and the second electrically conductive wire 21 are deformed in a V-shape. in which the cold-welded end connecting portion 25 represents a peak.

Then, as shown in Fig. 3 (d), the cover 30A is mounted from the outside of the end face of the insulator 7A.

Due to the mounting of the cover 30A, the cold-welded end connecting portion 25 housed in the receiving groove 12A is covered, and the first electrically conductive wire 20 and the second electrically conductive wire 21 can be attached.

The cover 30A has its protrusions or jaws 31A and a pressure protrusion 32 of the electrically conductive wire.

The cover 30A is also made of a resin which is the same material as the material of the insulator 7A.

The protrusions or jaws 31A are arranged to hook into the mounting grooves 14A of the cover formed on the insulator 7A.

That is, their protrusions or jaws 31A are formed on the distal end portions at the four corners of the housing 30A and extend toward the stator split core 66 for protruding toward the receiving grooves 12A.

The electrically conductive wire pressure protrusion 32 is formed to extend toward the stator split core 66 in the region between its protrusions or jaws 31A formed on the inner and outer peripheral sides of the cover 30A to close the electrically conductive wire guide grooves 13A from the open side when the cover 30A is attached.

Since the mounting grooves 14A of the cover are formed on both sides in the annular direction of the insulator 7A, and the clamping protrusions or jaws 31A are formed on the cover 30A, work on mounting the cover 30A is performed efficiently, and manufacturing costs can be reduced.

That is, by simple operation in attaching the cover 30A to the isolates 7A, the first electrically conductive wire 20 and the second electrically conductive wire 21 can be attached without requiring a complicated arrangement.

In such a case, the insulator 7A and the cover 30A may preferably be hermetically sealed by ultrasonic welding or the like.

Next, a method of connecting the winding wires at the stator 100A will be briefly described.

-7EN 306025 B6

The first electrically conductive wire 20 is wound around the toothed portion of the stator split core 66.

For simplicity, it describes the first phase called the U phase, the second phase it is called the V phase, and the third phase is called the W phase.

The motor comprising the stator 100A is driven by arranging the first electrically conductive wires 20 of the respective phases in the order U phase, V phase and W phase, and by supplying alternating current with the phases shifted by 120 ° relative to the first electrically conductive wires 20.

The first electrically conductive wire 20 for each phase is formed, for example, by three or four coils. The winding directions of the first electrically conductive wires 20 are the same.

The initial winding positions of the first electrically conductive wires 20 of the respective phases are connected to the respective second electrically conductive wires 21.

Conversely, the end portions of the windings of the first electrically conductive wires 20 of the respective phases are connected to the terminals of the zero point (s).

Also, the first electrically conductive wires 20 of the stator 100A are connected to a single Y.

That is, the U phase coils are connected in series, the V phase coils are connected in series, and the W phase coils are connected in series.

Also the ends of the coils of the windings of the respective phases are connected to the zero points.

The stator 100B according to Embodiment 2 is connected similarly.

As described above, by the stator 100A, although cold pressure welding has been applied to the joint between the first electrically conductive wire 20 and the second electrically conductive wire 21, even though both electrically conductive wires are made of aluminum wires or one of the electrically conductive wires. It is made of aluminum wire, so the reliability of the connection can be ensured.

Therefore, an electrically conductive wire formed of aluminum wire can be used, and this approach is cost-effective as compared with an electrically conductive wire formed of copper wire.

Also, since the cold-welded end connecting portion 25 is housed in the receiving groove 12A of the insulator 7A and is covered by the cover 30A, it is possible to prevent the frayed portion from being dispersed by the cold-pressure-welded portion.

Thus, if the stator 100A is applied to a compressor, reliability against contamination of the compressor and the refrigeration system can be ensured.

Since the insulator 7A and the cover 30A are hermetically sealed by ultrasonic welding or the like, the reliability of the connecting structure can be further increased.

Since the stator 100A is formed of a plurality of stator divided cores 66 arranged in an annular shape, the covers 30A must usually be formed in the same number as the number of divisions.

However, since the insulator 7A of the same shape can be used for each of the stator split cores 66, the first electrically conductive wire 20 and the second electrically conductive wire 21 can be fixed in about three positions.

That is, the cover 30A may be disposed in each plurality of stator split cores 66.

-8EN 306025 B6

For example, in the case of nine split cores, if one cover 30A is arranged for each of the three split cores, then by forming three covers 30A, these three covers 30A can correspond to a single stator 100A.

Therefore, it may be an advantageous method in terms of reducing the number of components.

In Embodiment 1, an example has been described in which the first electrically conductive wire 20 and the second electrically conductive wire 21 are connected to each other by cold pressure welding.

However, other connections may be used.

For example, the first electrically conductive wire 20 and the second electrically conductive wire 21 may be joined by soldering.

In the case of soldering, if a bundle of two or three electrically conductive wires is connected by soldering, the connection is accommodated in the receiving groove 12A of the insulator 7A, the connection being covered by the cover 30A, similar advantages can be obtained as in cold pressure welding is used.

Embodiment 2

Giant. 4 is a schematic diagram for explaining the process structure of an electrically conductive wire connection at a motor stator according to Embodiment 2 of the present invention (hereinafter referred to as stator 100B only).

Giant. 5 shows a schematic illustration for a schematic illustration of the arrangement of the area near the receiving groove 12B of the insulator 7B of the stator 100B according to FIG. 4.

Giant. 6 shows a schematic illustration for a schematic illustration of the arrangement of the area near the mounting grooves 14B of the insulator cover 7B of the stator 100B according to FIG. 4.

Giant. 7 shows a schematic illustration for a schematic illustration of the assembled state of the stator split core 66 and the stator insulator 7B 100B.

The process of connecting the electrically conductive wire of the stator 100B will be described with reference to Figs. 4 to 7.

In Embodiment 1, an example has been described in which the connecting portion (cold pressure welded end connecting portion 25) of two electrically conductive wires is disposed on the end face side of the insulator 7A.

However, in Embodiment 2, an example will be described in which the connecting portion (cold pressure welded end connecting portion 25) of the two electrically conductive wires is arranged on the outer side surface of the insulator 7B.

Also, Fig. 4 schematically shows the state of one stator split core 66 of a plurality of split cores arranged in an annular shape, as viewed from the outer peripheral side.

In addition, Fig. 5 and Fig. 6 show a state where the cover 3OB is attached.

In particular, features other than Embodiment 1 will be described in Embodiment 2.

The same reference numerals are used for the same components in Embodiment 1, so their description will be omitted.

-9EN 306025 B6

In Embodiment 2, the letter "B" is added to the end of each reference numeral to distinguish it from the members described in Embodiment 1.

This is for the sake of clarity of the description, the basic functions being the same as described in embodiment 1.

As shown in Figs. 4 to 7, the insulator 7B is arranged on both end faces in the direction of the axis of rotation of the rotor at the stator split core 66.

The insulator 7B is provided with a receiving groove 12B.

The receiving groove 12B is formed on the outer side of the end face (outer peripheral side) of the insulator 7B so that the outer peripheral side of the receiving groove 12B is open.

The receiving groove 12B has a function for accommodating a cold pressure welded end connecting portion 25, which will be described later.

Insulator 7B is made of a resin that is similar to that of insulator 7A.

As shown in Fig. 4 and Fig. 7, the insulator 7B also has four guide grooves 13B of the electrically conductive wire and mounting grooves 14B of the cover.

The guide grooves 13B of the electrically conductive wire are formed so as to be arranged vertically on the outer peripheral side wall of the insulator 7B.

The guide grooves 13B of the electrically conductive wire have a function for accommodating a part of the first electrically conductive wire 20 and a part of the second electrically conductive wire 21.

The mounting grooves 14B of the cover are formed on the end face (the end face on the upper side of the sheet of paper according to Fig. 4) and on the lower part of the outer periphery of the insulator 7B.

The mounting grooves 14B of the housing have the function of clamping projections or jaws 31B of the housing 30B, which will be described later.

The first electrically conductive wire 20 and the second electrically conductive wire 21 are arranged on the insulator 7B.

The first electrically conductive wire 20 and the second electrically conductive wire 21 are similar to the case of Embodiment 1.

A portion of the first electrically conductive wire 20 and a portion of the second electrically conductive wire 21 are received in the guide grooves 13B of the electrically conductive wire, and the cold pressure welded end connecting portion 25 is received in the receiving groove 12B, and a portion of the first electrically conductive wire 20 conductive wire 21 are arranged on the insulator 7B.

However, in Embodiment 2, the first electrically conductive wire 20 and the second electrically conductive wire 21 are arranged on a straight line, i.e. in a straight line.

The cover 30B is arranged on a part of the upper end surface and on the outer peripheral side of the insulator 7B. By the arrangement of the cover 3OB, the cold-welded end connecting portion 25 housed in the receiving groove 12B is covered, and the first electrically conductive wire 20 and the second electrically conductive wire 21 can be attached.

The cover 3OB has its protrusions or jaws 31B.

-10GB 306025 B6

The cover 30B is also made of a resin which is the same material as the material of the insulator 7B.

The protrusions or jaws 31B are arranged to hook into the mounting grooves 14B of the cover formed on the insulator 7B.

That is, one of the clamping protrusions or jaws 31B is formed on a portion of the distal end portion extending from the upper end surface of the housing 3OB to the inner portion for protruding toward the stator split core 66.

The second projection or jaw 31B is formed on a portion of the distal end portion extending from the lower end surface of the housing 3OB toward the stator split core 66 for protruding to the inner side.

Since the mounting grooves 14B of the cover are formed on a portion of the upper end surface and a portion of the outer peripheral surface of the insulator 7B, and their protrusions or jaws 31B are formed on the cover 30B, work on mounting the cover 3OB is performed efficiently, and manufacturing costs can be reduced.

That is, by simple operation in attaching the cover 3OB to the insulator 7B, the first electrically conductive wire 20 and the second electrically conductive wire 21 can be attached without requiring a complicated arrangement.

In such a case, the insulator 7B and the cover 3B may preferably be hermetically sealed by ultrasonic welding or the like.

As already described above, since in the case of the stator 100B, cold pressure welding is performed at the connection between the first electrically conductive wire 20 and the second electrically conductive wire 21, even if the electrically conductive wires are both formed of aluminum wires or one of the electrically conductive wires. wire is made of aluminum wire, the reliability of the connection can be ensured.

Therefore, the electrically conductive wire formed as an aluminum wire can be successfully used, which is cost-effective compared to the electrically conductive wire formed as a copper wire.

Also, since the cold-welded end connector 25 is received in the receiving groove 12B of the insulator 7B and is covered by the cover 30B, it is possible to prevent the frayed portion from being dispersed by the cold-welded end connector 25.

Thus, if the stator 100B is applied to a compressor, reliability can be ensured against contamination of the compressor and the refrigeration system.

Since the insulator 7B and the cover 3OB are hermetically sealed by ultrasonic welding or the like, the reliability of the connecting structure can be further increased.

Also in the case of the stator 100B, in addition to the advantages obtained by the stator 100A according to Embodiment 1, since four guide grooves 13B of the electrically conductive wire are formed on the insulator 7B, the arrangement of the electrically conductive wires connected in the stator can be fixed. further limited if the arrangement can be fixed without an additional part.

Since the stator 100B is formed of a plurality of stator divided cores 66 arranged in an annular shape, the covers 3OB are usually formed in the same number as the number of divisions.

- 11 CZ 306025 B6

However, since the insulator 7B of the same shape can be used for each of the stator split cores 66, the first electrically conductive wire 20 and the second electrically conductive wire 21 can be fixed in about three positions.

For example, in the case of nine split cores, if one cover 30B is arranged for each of the three split cores, then by forming three covers 3OB, these three covers 30B can correspond to a single stator 100B.

It can therefore be an advantageous way in terms of reducing the number of components.

In Embodiment 2, an example has been described in which the first electrically conductive wire 20 and the second electrically conductive wire 21 are connected to each other by cold pressure welding.

However, other connections may be used.

For example, the first electrically conductive wire 20 and the second electrically conductive wire 21 may be joined by soldering.

In the case of soldering, if a bundle of two or three electrically conductive wires is connected by soldering, the connection is accommodated in the receiving groove 12B of the insulator 7B, the connection being covered by the cover 3OB, similar advantages can be obtained as in the case of cold pressure welding.

Embodiment 3

Giant. 8 is a schematic sectional view showing an example of an arrangement of a compressor A, which is one of the rotary machines, according to Embodiment 3 of the present invention.

Compressor A is described with reference to Fig. 8.

Compressor A is, for example, designed as a rotary compressor.

For example, compressor A forms part of a refrigeration cycle (heat pump cycle), such as a refrigeration plant, a refrigeration plant, a vending machine, an air conditioner or a water heater.

Compressor A also includes a motor having a stator according to Embodiment 1 or Embodiment 2.

In Embodiment 3, a case in which the stator 100A according to Embodiment 1 is used will be representative.

Compressor A sucks in the refrigerant which circulates in the refrigeration cycle, compresses this refrigerant and expels the refrigerant in a state of high temperature and high pressure.

Compressor A can be divided into a compressor part 3 and a motor part 2.

The compressor part 3 and the motor part 2 are housed in a sealed vessel (housing) L. This sealed vessel 1 is formed by a pressure vessel.

As shown in Fig. 8, the compressor part 3 is arranged in the lower part of the sealed container 1, while the motor part 2 is arranged in the upper part of the sealed container 1.

The suction pipe 9 for sucking in the gaseous refrigerant and the discharge pipe 10 for expelling the refrigerant gas are connected to the sealed container 1.

- 12GB 306025 B6

The motor part 2 comprises a rotor 5 mounted on a shaft 8 and a stator 100A mounted in a sealed container J.

The motor part 2 performs the function of rotating the shaft 8 so that the compressor part 3 compresses the refrigerant gas.

Also, the outer peripheral surface of the stator 100A is fixed to the sealed container 1 and is supported by the hot-fit fit or the like.

That is, the rotor 5 and the stator 100A form a "motor" according to an embodiment of the present invention.

The stator 100A is formed by mounting a multi-phase winding wire (not shown) on the stator split cores 66, as described in Embodiment 1 and Embodiment 2.

The shaft 8 rotates by rotating the rotor 5.

The compressor part 3 comprises a cylinder which forms a compression chamber, a rolling piston which rotates in the cylinder by means of an eccentric shaft part 8, a vane which contacts the rolling piston and divides the cylinder interior into a high-pressure and a low-pressure side, and an upper bearing and a lower bearing they seal the cylinder holes.

The compressor part 3 performs the function of compressing the refrigerant gas sucked in by the suction pipe 9.

In the compressor A arranged as described above, the refrigerant flowing into the cylinder is compressed in cooperation with the rolling piston and the vane which forms the compressor part 3 is supplied to the upper part of the engine part 2 through an air gap (not shown) of the engine part. 2, is turned by rotating the rotor 5, and is extruded to the outside of the sealed container 1 from the discharge tube W.

As described above, since the compressor A has a motor including a stator according to Embodiment 1 or Embodiment 2, the compressor A is cost-effective, and its reliability can be increased.

Since the motor according to this embodiment also includes a stator according to Embodiment 1 or Embodiment 2, the motor is cost-effective, and its reliability can be increased.

In Embodiment 3, an example has been described in which an engine according to an embodiment of the present invention is mounted in a compressor A.

However, the invention is not limited to such a case.

For example, a motor according to an embodiment of the present invention may be used for a rotary machine, such as a fan.

Claims (7)

PATENT CLAIMS An engine stator (100A, 100B), comprising: a plurality of stator split cores (66) each provided with a toothed portion, an insulator (7A, 7B) disposed on each of the stator split cores (66), a first electrically conductive wire (20) disposed on the toothed portion of each of the stator split cores (66) provided with an insulator (7A, 7B), and a second electrically conductive wire (21), the first end of which is connected to the first electrically conductive wire (20), for at least one first electrically conductive wire (20) or a second electrically conductive wire (20); The conductive wire (21) is an aluminum wire, characterized in that the insulator (7A, 7B) is provided with a receiving groove (12A, 12B) for accommodating the end connecting portion (25) to which the first electrically conductive wire (20) is located, and the second electrically conductive wire (21) is connected, wherein the receiving groove (12A, 12B) is covered by the cover (30A, 30B) in a state where the end connecting portion (25) is received in the receiving groove (12A, 12B). Motor stator according to Claim 1, characterized in that the end connecting part (25) is formed by cold pressure welding. Motor stator according to Claim 1 or 2, characterized in that the upper side of the receiving groove (12A, 12B) formed on the outside of the end face of the insulator (7A, 7B) is open. Motor stator according to Claim 1 or 2, characterized in that the outer circumferential side of the bearing groove (12A, 12B) formed on the outer side of the end face of the insulator (7A, 7B) is open. Motor stator according to claim 3, characterized in that if the end connecting part (25) is accommodated in a receiving groove (12A, 12B) formed on the outside of the end face of the insulator (7A, 7B) such that the upper side of the receiving groove (12A, 12B) is open, the end connecting portion (25) is received in the receiving groove (12A, 12B) in a state in which the end side of the first electrically conductive wire (20) and the end side of the second electrically conductive wire (21) are pressed on parts different from the end connecting part (25) and are deformed. Motor stator according to any one of claims 1 to 5, characterized in that the insulator (7A, 7B) and the cover (30A, 30B) are made of a single resin material. The motor stator according to any one of claims 1 to 6, characterized in that the cover (30A, 30B) is arranged on each stator split core (66) or on each plurality of stator split cores (66).