JP2000224794A - Insulating device for coil end connection of motor and method of insulation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a good workability by providing a connection storing section with a guide which is inserted between coil ends of a stator of a motor and another connection storing section which is disposed on the side opposite to the coil ends with respect to the connection storing section with a guide and is formed integrally with the connection storing section with a guide. SOLUTION: A connection 1c between a lead wire 1a of a stator of a motor and a coil end 1b or a connection 1d between coil ends 1b of the stator is inserted into a connection storing section 3 through an opening 3a. Into a connection storing section 4 with a guide, the connection 1c or 1d is inserted through an opening 4a. The connection storing section 3 is disposed on the side opposite to the coil ends with respect to the connection storing section 4 with a guide and is formed integrally with the connection storing section 4 with a guide to form another connection storing section different from the connection storing section 4 with a guide. Because of this structure, a good workability can be obtained in fixing insulating devices and the number of the insulating devices to be used can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulating device for insulating a stator of an electric motor from an electrical connection between a lead wire and a coil end or between coil ends.

[0002]

2. Description of the Related Art FIG.
FIG. 6 is a side view showing an insulating device at a connection point between a coil end and a lead wire of a conventional motor stator disclosed in Japanese Patent Application Publication No. 8 (JP-A-8), and FIG. 6 (b) shows a front view thereof. In FIG. 6, reference numeral 3 denotes a bag-shaped storage portion for a connection portion for inserting the coil end connection portion of the electric motor stator, and three storage portions are formed in a row in a row.
In (a), each right side of the storage section 3 is an opening insertion section. Reference numeral 8 denotes a welding portion, and 9 denotes a pedestal portion. By inserting only the pedestal portion 9 between the coil end of the internal phase coil of the motor stator coil end and the coil end of the external phase coil, the housing 3 is not buried in the coil and the insulating device can be used. Fixed to the end surface. Since the insulating device can be fixed at a fixed position on the surface of the coil end, in the process of lacing and shaping the coil end, the insulating device does not escape from above the coil end, thereby improving workability.

[0003]

Since the conventional insulating device is constructed as described above, it is necessary to insert a pedestal between the coil end of the inner phase coil and the coil end of the outer phase coil of the motor stator. Only, and all connection points between the lead wire and the coil end are arranged on the coil end surface. Depending on the number of phases and the number of poles of the motor, for example, in a three-phase four-pole motor, the total number of connection points between the lead wire and the coil end or between the coil ends may be as large as seven.
Since all of the two connection point storage sections are located on the coil end surface, the total length of the connection point storage sections that are continuously arranged is longer than one round of the coil end surface, and the connection point storage section extends sideways on the coil end surface. There is a problem that a portion fixed in two rows is generated, and the workability of coil end shaping is reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has been made in an operation of shaping a coil end after fixing an insulating device which insulates a coil end connection portion of a motor stator to the coil end. An object of the present invention is to provide an insulating device for obtaining good workability. Another object is to provide an insulating device that can reduce the number of used insulating devices. It is another object of the present invention to provide an insulating device that does not cause insulation failure.

[0005]

According to a first aspect of the present invention, there is provided an insulation device for a coil end connection portion of a motor, wherein insulating paper is formed in a bag shape to insulate and accommodate a coil end connection portion of a stator of the motor. In the insulating device of the coil end connection part of the motor having the connection part storage part, the connection part storage part has a connection part insertion guide part, and the connection with the guide part inserted between the coil ends of the stator of the motor. When the point storage part and the connection part storage part with the guide part are inserted between the coil ends, it is located on the opposite side of the coil end with respect to the connection part storage part with the guide part, and is formed integrally with the connection part storage part with the guide part. And a connection portion storage portion different from the connection portion storage portion with a guide portion.

According to a second aspect of the present invention, there is provided an insulating device for a coil end connection portion of a motor according to the first aspect of the present invention.
A connection portion storage section for insulatingly storing a coil end connection section of a stator of an electric motor by forming insulating paper in a bag shape is formed by laminating a plurality of layers of film-shaped insulating paper.

Further, according to a third aspect of the present invention, there is provided a method of insulating a coil end connecting portion of a motor, wherein the insulating paper is formed in a bag shape so that a connecting portion with a connecting portion has a connecting portion insertion guide portion. And the connecting part storage part with the guide part is located on the opposite side of the coil end with respect to the connection part storage part with the guide part when inserted between the coil ends, and is formed integrally with the connection part storage part with the guide part. In addition, an insulation device having a connection part storage part different from the connection part storage part with a guide part is formed, and the coil end and the lead wire of the stator of the electric motor are electrically connected to each other. Forming at least one of the connecting portions, inserting the connecting portion into a connecting portion storing portion with a guiding portion of the insulating device and a connecting portion storing portion different from the connecting portion storing portion with the guiding portion, and connecting portion inserting guide Use the connection At least the guide portion having connecting portion housing portion of the housing portion is to insert fixed between the coil end of the stator of the motor.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, Embodiment 1 will be described with reference to the drawings. FIG. 1A is a side view of the insulation device of the present invention, and FIG. 1B is a front view. In FIG. 1, reference numeral 1a denotes a lead wire of a motor stator;
b is a coil end of the motor stator, 1c is a coil end connection part, a connection point between the lead wire 1a and the coil end 1b, 1d is a coil end connection part, and a connection point between the coil ends 1b. In the connection portion 1c or 1d, the lead wire 1a and the coil end 1b are electrically connected by welding or the like.
Reference numeral 2a denotes an end welded portion obtained by winding a plurality of layers of a film-like insulating paper capable of being welded into a cylindrical shape, and welding one end portion of the entire cylinder.
Is a welded portion substantially perpendicular to the end welded portion 2a and substantially parallel to the central axis of the cylinder, but the outermost insulating paper is not welded. 3
Is a bag-shaped connection point storage part into which the connection point 1c between the lead wire 1a of the motor stator and the coil end 1b or the connection point 1d between the coil ends 1b of the motor stator can be inserted through the opening 3a. It is a bag-shaped connection portion storage portion with a guide portion into which the stator coil end connection portion 1c or 1d can be inserted through the opening 4a, and is insulating paper that is not welded from the outermost periphery of the connection portion storage portion 4 with a guide portion. The connection point insertion guide 4b is exposed. The connection part storage part 3 and the connection part storage part 4 with a guide part are arranged in parallel with the welding part 2b interposed therebetween in a direction substantially perpendicular to the connection part insertion direction. That is, the relation between the connection part storage part 3 and the connection part storage part 4 with the guide part is that the connection part storage part 4 with the guide part is inserted into the coil end surface of the motor stator when the connection part storage part 4 with the guide part is inserted between the coil ends. In a state where the storage unit 4 is brought into contact with the insulation device and the insulating device is positioned, the connection location storage unit 3 is located on the opposite side to the coil end with respect to the connection location storage unit 4 with the guide unit, and is connected to the connection location storage unit 4 with the guide unit. It is formed integrally and forms a connection part storage part different from the connection part storage part 4 with a guide part. FIG. 2 is a cross-sectional view of a portion where the insulating device of this embodiment is fixed to a coil end of the motor stator. In FIG. 2, 5 is a coil end of an internal phase coil of the motor stator, and 6 is a motor stator. Coil end of external phase coil, 7
Is the iron core of the motor stator. FIG. 3 shows an electric circuit of the three-phase motor stator, in which three connection points 1c between the stator lead wire 1a and the coil end 1b, one connection point 1d between the coil ends 1b, and the total number of connection points are four. Here are some examples.

This embodiment is configured as described above,
As shown in FIG. 1, after inserting the connection portion 1c or 1d from the opening 3a, 4a into the connection portion storage portion 3 and the connection portion storage portion 4 with the guide portion of the insulating device, the guide is guided to the coil end surface of the motor stator. Positioning the insulating device in a state where the connection part storage part 4 with the part is in contact, and pressing between the connection part storage part 4 with the guide part and the connection part insertion guide part 4b with another, for example, a thin plate-like insertion piece. As a result, at least the connection portion storage section 4 with the guide section is inserted between the coil end 5 of the inner phase coil and the coil end 6 of the outer phase coil as shown in FIG. 2 to fix the insulating device to the coil end. Also,
The connection part storage part 4 with the guide part is inserted between the coil end 5 of the inner phase coil and the coil end 6 of the outer phase coil,
It may be inserted up to the connection part storage part 3. At this time, the connection part storage part 4 with the guide part and the connection part storage part 3 can be easily inserted between the coil ends by the connection part insertion guide part 4b. The cross section of the motor stator coil end shown in FIG. 2 has two layers of the inner phase coil 5 and the outer phase coil 6. As with the layers, the insulating device may be inserted between any coil ends.

[0010] As described above, the connection portion housing portion 4 with the guide portion from which the connection portion insertion guide portion 4b protrudes is always inserted between the inner phase coil end 5 and the outer phase coil end 6 and fixed. Connection part storage part 3 fixed on the surface
Can be smaller than the total number of the stator coil end connection points 1c and 1d of the motor. For this reason, even if the stator coil end connection locations 1c and 1d increase, the connection location storage portions 3 are not fixed side by side in two rows on the coil end surface, and the workability of coil end shaping is reduced. There is no. Also,
Since the insulating device is made by winding a plurality of layers of film-shaped insulating paper into a cylindrical shape, it is easy to follow the shape of the coil end, and even if a protrusion is formed at the stator coil end connection point 1c or 1d of the motor, The stator coil end connection point 1c or 1d does not break through all the plurality of layers of the connection point storage part 3 or the connection part storage part 4 with the guide part of the insulating device, and does not cause insulation failure due to contact with the coil electric wire. Further, since the insulating device can be fixed at a fixed position of the coil end, the workability is improved because the insulating device does not escape from above the coil end in the step of racing and shaping the coil end. That is, according to the present embodiment, two connection part storage parts for inserting the coil end connection part of the motor stator are installed in a direction substantially perpendicular to the connection part insertion direction, and after the connection parts are inserted into the storage part. By inserting and fixing the connection part storage part with the guide part between the coil end of the inner phase coil and the coil end of the outer phase coil, good workability can be obtained in the fixing work of the insulating device, and the number of used insulating devices can be improved. Can be reduced. Further, as the film-shaped insulating paper, for example, a thickness of about 100 μm is appropriate, and the whole laminated as a plurality of layers is appropriately about 500 μm. If the material is made of a material such as PET that can be welded and has refrigerant resistance, The present invention can be applied to an electric motor of a hermetic compressor for compressing a refrigerant gas such as a refrigerating device or an air conditioner.

Next, an example in which the insulating device of the present invention is applied to a three-phase motor will be described with reference to FIG. The three-phase motor stator of the electric circuit shown in FIG.
Since the total number of the coil ends is four, if two insulating devices according to the embodiment of the present invention are used and fixed at diagonal positions of the coil ends, a substantially uniform coil end cross section can be obtained over the entire circumference of the coil end. In addition, the height of the coil end is not partially increased, and the coil end is easily shaped.

Embodiment 2 FIG. Embodiment 2 FIG. 4
A description will be given based on (a), (b), (c), and (d).
Embodiment 2 is different from Embodiment 1 with respect to the insulating device shown in FIG. 1 in that an end weld 2a and a weld 2b substantially perpendicular to the end weld 2a and substantially parallel to the central axis of the cylinder are changed. Things.

In FIG. 4 (a), reference numeral 2c denotes an end welded portion obtained by winding a plurality of layers of insulable film-shaped insulating paper into a cylindrical shape, and separately welding the two opposite ends of the cylinder. The welded portion is substantially parallel to the central axis and substantially perpendicular to the end welded portion 2c. Reference numeral 3 denotes a bag-shaped connection point storage section in which a connection point of the motor stator can be inserted through the opening 3a, and reference numeral 4 denotes a bag-shaped connection point storage section with a guide section in which the connection point can be inserted through the opening 4a. And 4a have the same size of the opening, and are open on the opposite side. For this reason, since the connection point of the motor stator can be inserted from a different direction, useless routing of the connection point to the insulating device can be omitted, and the cost can be reduced.

In FIG. 4 (b), reference numeral 2d denotes a central welded portion obtained by winding a plurality of layers of insulable film-shaped insulating paper into a cylindrical shape and welding the central portion of the cylindrical shape in a direction substantially perpendicular to the central axis of the cylindrical shape.
Reference numeral 2b denotes a welded portion substantially parallel to the central axis of the cylinder and substantially perpendicular to the central welded portion 2d. By the welded parts 2b and 2d, two connection part storage parts 3 and two connection part storage parts 4 with guide parts are formed, and the connection part of the four motor stators can be insulated by one insulating device, as shown in FIG. This is equivalent to connecting the two insulating devices connected by the end welding portions 2a, and the number of used insulating devices can be reduced.

FIG. 4 (c) is a view in which the position of the welding portion 2b substantially parallel to the central axis of the cylinder in FIG. 1 is changed from the center portion to the connection portion insertion guide portion 4b side. The part 3 is larger than the connection part storage part 4 with a guide part. For this reason, a connection portion which is thickened due to the electrical connection of a large number of coil ends, such as a neutral point (1d in FIG. 3) of the three-phase motor, is inserted into the connection portion storage portion 3 to insulate the connection portion. be able to.

FIG. 4 (d) shows a configuration in which a plurality of welding portions 2b are provided substantially parallel to the center axis of the cylinder in FIG. 1, and as a result, a plurality of connection portion storage portions 3 and one connection portion with a guide portion are provided. The storage part 4 is formed, and three or more stator coil end connection points 1c or 1d of the motor (or three or more stator coil end connection points 1c and 1d in total of the motor) are insulated by one insulating device. As a result, the number of used insulating devices can be reduced. In this case, what is inserted between the coil ends is up to the connection part storage part 4 with the guide part, up to the connection part storage part 3 on the side of the connection part storage part 4 with the guide part, and in some cases, the connection part storage part. May be inserted as described above.

It is to be noted that the end welding portions 2c formed by welding different sides of both ends of the cylinder described with reference to FIG. 4A are provided in a direction substantially perpendicular to the center axis of the cylinder described with reference to FIG. Providing a central welded portion 2d obtained by welding the central portion of the cylinder, FIG.
The position change of the welding portion 2b substantially parallel to the center axis of the cylinder described in (c), the installation of a plurality of welding portions 2b substantially parallel to the center axis of the cylinder described in FIG. With such a structure, it is possible to have the above-mentioned functions and effects in combination, and it is possible to meet various requirements for the coil end connection portion of the motor stator. For example, it is possible to simultaneously reduce the cost and the number of insulating devices to be used because unnecessary routing of the connection portion to the insulating device can be omitted. In addition, the relationship between the connection part storage part 3 of this embodiment and the connection part storage part 4 with a guide part is the same as that described in the first embodiment. In other words, when the connection part storage part 4 with the guide part is inserted between the coil ends, the connection part storage part 3 with the guide part is brought into contact with the coil end surface of the motor stator and the insulating device is positioned. Is located on the opposite side of the coil end with respect to the connection part storage part 4 with the guide part, is formed integrally with the connection part storage part 4 with the guide part, and is connected separately from the connection part storage part 4 with the guide part. Form a location storage section.

Further, the insulating device described in the second embodiment has a connection portion insertion guide portion 4b which is a characteristic component in the first embodiment, and is provided from the outermost periphery of the connection portion storage portion 4 with a guide portion. Is out. For this reason, by pushing between the connection part storage part 4 with a guide part and the connection part insertion guide part 4b with another thin plate-like insertion piece or the like, at least the connection part storage part 4 with a guide part is shown in FIG. As described above, the coil end 5 of the inner phase coil and the coil end 6 of the outer phase coil
The insulation device can be fixed to the coil end by being inserted between them, and the workability is improved because the insulation device does not escape from above the coil end in the step of racing and shaping the coil end.

Next, an example in which the insulation device of each of the first and second embodiments is applied to a three-phase motor and a single-phase motor will be described with reference to the drawings. FIG. 5A shows an electric circuit of the three-phase motor stator, in which the connection 1c between the lead wire 1a of the stator and the coil end 1b is three.
And the coil end 1b, there are four connecting places 1d between the connecting parts, and the total number of connecting places is seven. FIG. 5 (b) shows an electric circuit of the stator of the single-phase motor, and the lead wire 1a of the stator and the coil end 1b are shown.
There are three connection points 1c.

For example, in the three-phase motor shown in FIG. 5A, since the total number of connection points at the coil ends is seven, two insulating devices shown in FIG. 1A and two insulating devices shown in FIG. If one of the shown insulating devices is used and fixed to the coil end at equal intervals, a substantially uniform coil end cross section can be obtained over the entire circumference of the coil end, so that the height of the coil end is partially increased. In addition, coil end shaping becomes easy.

In the single-phase motor of FIG. 5B, the total number of connection points at the coil end is three. Therefore, if one insulating device shown in FIG. Since only one insulating device is used, the number of used insulating devices can be reduced.

In each of the above embodiments, the insulating device is provided with the connecting portion insertion guiding portion 4b. However, this is not always necessary. The effects described in the above embodiments can be similarly obtained. The insulating device is formed by winding a thin insulating paper a plurality of times.
It may be wound, and the effects described in the above embodiments are similarly obtained. However, it is necessary to select a material in order to easily follow the shape of the coil end.

[0023]

As described above, the insulating device for the coil end connection portion of the motor according to the first invention of the present invention forms the insulating paper in a bag shape to insulate the coil end connection portion of the motor stator. In an insulating device for a coil end connection part of a motor having a connection part storage part to be stored, a connection part insertion guide part is provided as a connection part storage part, and a guide part inserted between coil ends of a stator of the motor is provided. When the connection part storage part and the connection part storage part with the guide part are inserted between the coil ends, it is located on the opposite side to the coil end with respect to the connection part storage part with the guide part, and is integrated with the connection part storage part with the guide part. It is formed and has a connection point storage part different from the connection point storage part with a guide part, so even if the number of coil end connection parts increases, the connection point storage parts are arranged in two rows horizontally on the coil end surface. Without being fixed side by side With obtain good workability in the isolator fixing work, it is possible to reduce the number of use of isolators.

According to a second aspect of the present invention, there is provided an insulating device for a coil end connection portion of a motor according to the first aspect of the present invention.
Since the connecting portion storage portion for insulatingly storing the coil end connection portion of the stator of the motor by forming the insulating paper into a bag shape is formed by laminating a plurality of layers of the film-shaped insulating paper, the effect of the first invention is achieved. In addition, the insulating device easily conforms to the shape of the coil end, and even if a protrusion is formed at the coil end connection portion, the insulation paper does not break through all of the plurality of layers of the insulating paper in the connection portion storage portion.

According to a third aspect of the present invention, there is provided a method of insulating a coil end connecting portion of a motor, wherein the insulating paper is formed in a bag shape so that a connecting portion with a connecting portion has a connecting portion insertion guiding portion. And the connecting part storage part with the guide part is located on the opposite side of the coil end with respect to the connection part storage part with the guide part when inserted between the coil ends, and is formed integrally with the connection part storage part with the guide part. In addition, an insulation device having a connection part storage part different from the connection part storage part with a guide part is formed, and the coil end and the lead wire of the stator of the electric motor are electrically connected to each other. Forming at least one of the connecting portions, inserting the connecting portion into a connecting portion storing portion with a guiding portion of the insulating device and a connecting portion storing portion different from the connecting portion storing portion with the guiding portion, and connecting portion inserting guide Use the connection Since at least the connection part storage part with the guide part of the storage part is inserted and fixed between the coil ends of the stator of the electric motor, even if the number of coil end connection parts is large, the connection part storage part is laterally two on the coil end surface. It is possible to obtain good workability in the work of fixing the insulating device without being fixed in a line, and to reduce the number of used insulating devices.

[Brief description of the drawings]

FIG. 1 is a front view and a side view showing an insulating device according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a state in which the insulating device according to the first embodiment of the present invention is fixed to a coil end.

FIG. 3 is an electric circuit of a three-phase motor stator having four coil end connection points.

FIG. 4 is a side view showing an insulating device according to a second embodiment of the present invention.

FIG. 5 is an electric circuit of a three-phase motor stator having seven coil end connection points and a single-phase motor stator having three coil end connection points.

FIG. 6 is a front view and a side view showing a conventional insulating device.

[Explanation of symbols]

1a Lead wire of motor stator, 1b Coil end of motor stator, 1c Connection between coil lead and coil end (coil end connection), 1d Connection between coil ends, coil end connection), 3 connection storage Part, connection part storage part with connection part (connection part storage part), 4b connection part insertion guide part, 5 coil end of internal phase coil of motor stator,
6 Coil end of external phase coil of motor stator.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tomoaki Oikawa 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Inside Mitsubishi Electric Corporation (72) Inventor Takashi Yamamoto 2-6-1, Otemachi, Chiyoda-ku, Tokyo (72) Inventor Hideaki Maeyama 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Corporation (72) Inventor Fumihiko Ishizono 2-6-2, Otemachi, Chiyoda-ku, Tokyo F term in Ryo Electric Co., Ltd. (reference) 5H604 AA05 AA08 BB01 BB14 CC01 CC05 CC13 CC16 PB03 PC01 PC05 QB01 QB15

Claims (3)

[Claims] 1. An insulating device for a coil end connection part of a motor, comprising a connection part storage part for insulatingly storing a coil end connection part of a stator of a motor by forming insulating paper in a bag shape, wherein the connection part storage part is provided. A connection portion storage portion with a guide portion inserted between the coil ends of the stator of the electric motor, and the connection portion storage portion with the guide portion inserted between the coil ends. A connection portion storage portion that is located on the opposite side to the coil end with respect to the connection portion storage portion with the portion, is formed integrally with the connection portion storage portion with the guide portion, and is different from the connection portion storage portion with the guide portion. An insulation device for a coil end connection part of a motor, comprising: 2. A connection place housing for insulatingly storing a coil end connection part of a stator of a motor by forming the insulating paper in a bag shape, wherein a plurality of layers of film-shaped insulating paper are laminated. The insulation device for a coil end connection part of a motor according to claim 1. 3. A connection part storage part with a guide part having a connection part insertion guide part by forming the insulating paper in a bag shape, and the guide part when the connection part storage part with the guide part is inserted between the coil ends. A connection portion storage portion that is located on the opposite side to the coil end with respect to the connection portion storage portion with the portion, is formed integrally with the connection portion storage portion with the guide portion, and is different from the connection portion storage portion with the guide portion. And at least one of a connecting portion for electrically connecting the coil end of the stator of the motor and the lead wire and a connecting portion for electrically connecting the coil ends to each other. Formed, and inserts the connection part into a connection part storage part with a guide part of the insulating device and a connection part storage part different from the connection part storage part with the guide part, using the connection part insertion guide part. , Of the two connection point storage sections Insulation treatment method of the coil end connecting portions of the motor, characterized in that the insert fixed between the coil end of the stator of the Chi at least the guiding part having connecting portions accommodating portion an electric motor.