WO2024209988A1

WO2024209988A1 - Motor for electric compressor, method for manufacturing same, and electric compressor provided with same

Info

Publication number: WO2024209988A1
Application number: PCT/JP2024/011843
Authority: WO
Inventors: 颯一郎林
Original assignee: サンデン株式会社
Priority date: 2023-04-06
Filing date: 2024-03-26
Publication date: 2024-10-10

Abstract

[Problem] To provide a motor for an electric compressor, wherein the number of components can be reduced and an assembly process can be simplified, while improving insulation. [Solution] In this motor for an electric compressor, a core 22 of a stator 21 is formed from an inner core 26 that has a plurality of adjacent teeth 27, and an outer core 28 that is joined to the outside of the inner core 26 to form a magnetic path, and insulators 33, 34 that have been provided with windings 23 are mounted on respective teeth 27. The insulators 33 integrally have winding mounting sections 37 to which the windings 23 are provided, inside wall sections 38 located to the inside of the winding mounting sections 37, and inside insulating sheet sections 41 protruding outward from the inside wall sections 38. The inside insulating sheet sections 41 are positioned between adjacent windings 23 during a condition in which the insulators 33 are mounted on the teeth 27.

Description

Motor for electric compressor, manufacturing method thereof, and electric compressor equipped with the same

The present invention relates to a motor for an electric compressor in which an insulator is disposed between the stator winding and the core, a manufacturing method thereof, and an electric compressor equipped with the same.

Traditionally, motors for driving the compression elements of electric compressors have been composed of a stator and a rotor that rotates inside the stator. The stator is composed of an inner core with multiple adjacent teeth, and an outer core that is connected to the outside of the inner core to form a magnetic path, and an insulator with a winding is attached to each tooth (see, for example, Patent Document 1).

Here, electrical insulation between the windings and the core is achieved by insulators made of insulating materials such as hard synthetic resin, and electrical insulation between the windings is achieved by coating, but to accommodate the high voltage of the power supply, insulating sheets are inserted between adjacent windings.

As a result, the number of parts increases, the assembly process becomes more complicated and time-consuming, and failures occur in which the insulating sheet comes off due to vibrations while the electric compressor is in operation, reducing the insulation. As a result, several structures have been proposed in which the insulating sheet is provided as part of the insulator (see, for example, Patent Document 2).

JP 2020-78208 A JP 2005-137180 A

However, in one conventional structure, an insulating sheet portion (insulating piece) was provided on the outer wall of the insulator (insulating bobbin), and this insulating sheet portion had to be folded before being attached to the teeth, which increased the number of assembly steps. In another structure, the insulator (bobbin) was made up of two parts (one and the other cap-shaped portion), each of which had an insulating sheet portion (insulating piece), but this resulted in a more complex shape, an increased number of parts, and increased assembly steps.

The present invention was made to solve the above-mentioned conventional technical problems, and aims to provide a motor for an electric compressor that can reduce the number of parts and simplify the assembly process while improving insulation, as well as a manufacturing method thereof, and an electric compressor equipped with the same.

In order to solve the above problems, the motor for an electric compressor of the present invention has a stator core composed of an inner core having multiple adjacent teeth and an outer core that is connected to the outside of the inner core to form a magnetic path, and an insulator with a winding is attached to each tooth, and the insulator has a winding part on which the winding is applied, an inner wall part located inside the winding part in the radial direction of the stator, and an inner insulating sheet part that protrudes outward from the inner wall part, and this inner insulating sheet part is located between adjacent windings when the insulator is attached to the teeth.

The motor for an electric compressor according to claim 2 is characterized in that the insulator in the above invention has a winding portion, an inner wall portion, and an inner insulating sheet portion that are integrally formed from hard resin.

The motor for an electric compressor according to the invention of claim 3 is characterized in that in the invention of claim 1, the inner insulating sheet portion protrudes outward integrally from both ends of the inner wall portion in the circumferential direction of the stator, and the insulator has an inner insulating sheet portion and another insulator does not have an inner insulating sheet portion, and the insulator with the inner insulating sheet portion and the insulator without the inner insulating sheet portion are arranged alternately in the circumferential direction of the stator.

The motor for an electric compressor according to claim 4 is characterized in that the insulator having an inner insulating sheet portion in the above invention has an outer wall portion located outside the winding portion in the radial direction of the stator, and an outer insulating sheet portion that protrudes outward from the outer wall portion, and the outer insulating sheet portion protrudes outward integrally from both ends of the outer wall portion in the circumferential direction of the stator, and is located between the winding and the outer core.

The motor for an electric compressor according to claim 5 is characterized in that in the above invention, the outer insulating sheet portion protrudes outward from the outer wall portion to a dimension that is between an insulator having an inner insulating sheet portion and an adjacent insulator that does not have an inner insulating sheet portion.

The electric compressor of the invention of claim 6 is characterized in that it is equipped with an electric compressor motor of each of the above inventions, and that this electric compressor motor and compression element are housed in a container.

The manufacturing method for a motor for an electric compressor according to claim 7 is characterized in that, in the inventions according to claims 3 to 5, an insulator that does not have an inner insulating sheet portion is attached to every other tooth, and then an insulator that has an inner insulating sheet portion is attached to the teeth from the outside in the radial direction of the stator so that the inner insulating sheet portion is bent.

The manufacturing method of the motor for an electric compressor according to the invention of claim 8 is a method for manufacturing a motor for an electric compressor, in which the core of the stator is composed of an inner core having a number of adjacent teeth and an outer core that is connected to the outside of the inner core to form a magnetic path, and an insulator with a winding is attached to each tooth, and is characterized in that the method includes preparing a winding part on which the winding is applied, an inner wall part located inside the winding part in the radial direction of the stator, an insulator having an inner insulating sheet part integrally extending outward from both ends of the inner wall part in the circumferential direction of the stator, and another insulator without an inner insulating sheet part, and attaching the insulator without the inner insulating sheet part to every other tooth, and then attaching the insulator with the inner insulating sheet part to the teeth from the outside in the radial direction of the stator so that the inner insulating sheet part is bent, thereby disposing the inner insulating sheet part between adjacent windings.

According to the invention of claim 1, in a motor for an electric compressor, the stator core is composed of an inner core having a number of adjacent teeth and an outer core that is connected to the outside of this inner core to form a magnetic path, and an insulator with a winding is attached to each tooth, the insulator has a winding part on which the winding is applied, an inner wall part located inside the winding part in the radial direction of the stator, and an inner insulating sheet part that protrudes outward from this inner wall part, and this inner insulating sheet part is configured to be located between adjacent windings when the insulator is attached to the teeth. Therefore, by integrating the insulator on which the winding is applied and the inner insulating sheet part located between the windings, it is possible to reduce the number of parts and simplify the assembly process. Furthermore, by integrating them, it is possible to prevent failures such as the inner insulating sheet part becoming detached due to vibration.

In this case, the inner insulating sheet portion is configured to protrude outward from the inner wall portion, so the winding can be wound around the winding portion without any problems.

In the present invention, the inner insulating sheet portion is integrally formed on the inner wall portion of the insulator, so when the stator is attached to the teeth from the outside in the radial direction, the inner insulating sheet portion is folded by the adjacent insulator and positioned between the adjacent windings. This makes it possible to improve the ease of assembly.

In particular, as in the invention of claim 3, the inner insulating sheet portion is formed so as to protrude outward integrally from both ends of the inner wall portion in the circumferential direction of the stator, and an insulator having such inner insulating sheet portion and another insulator not having an inner insulating sheet portion are prepared, and the insulator having the inner insulating sheet portion and the insulator not having the inner insulating sheet portion are arranged alternately in the circumferential direction of the stator. For example, as in the invention of claim 7 or claim 8, after attaching the insulator not having the inner insulating sheet portion to every other tooth, the insulator having the inner insulating sheet portion is attached to the tooth from the outside in the radial direction of the stator so that the inner insulating sheet portion is folded, thereby making it possible to simultaneously attach the insulator and fold the inner insulating sheet portion.

If only an insulator having an inner insulating sheet portion is used, it is necessary to first fold the inner insulating sheet portion of the insulator that is attached to the teeth. However, by using a configuration such as that of the invention of

claims

3, 7, and 8, this work becomes unnecessary, and the ease of assembly can be significantly improved through automation.

The insulator's winding portion, inner wall portion, and inner insulating sheet portion may be made by integral molding of hard resin, as in the invention of claim 2.

Furthermore, as in the invention of claim 4, an outer wall portion located outside the winding portion in the radial direction of the stator and an outer insulating sheet portion extending outward from the outer wall portion are integrally formed in an insulator having an inner insulating sheet portion, and the outer insulating sheet portion extends outward from both ends of the outer wall portion in the circumferential direction of the stator. By arranging the outer insulating sheet portion so as to extend outward integrally from both ends of the outer wall portion in the circumferential direction of the stator and to be positioned between the winding and the outer core, insulation between the winding and the outer core is also achieved, and the insulation properties can be further improved.

In that case, as in the invention of claim 5, by configuring the outer insulating sheet portion to protrude outward from the outer wall portion with a dimension that is between an insulator having an inner insulating sheet portion and an adjacent insulator that does not have an inner insulating sheet portion, it is possible to eliminate the inconvenience of interference between the outer insulating sheet portion and the outer core when joining the outer core to the inner core.

In this case, the outer insulating sheet portion also extends outward from the outer wall portion, so the winding can be wound around the winding portion without any problems.

And as in the invention of claim 6, by constructing an electric compressor by housing the electric compressor motor and compression element of the inventions of claims 1 to 5 in a container, it is possible to obtain an electric compressor with stable performance and few breakdowns.

1 is a vertical sectional side view of an electric compressor equipped with a motor for an electric compressor according to an embodiment of the present invention; FIG. 2 is an exploded perspective view of a stator constituting the motor for the electric compressor of FIG. 1 . FIG. 3 is a cross-sectional plan view of the inner core of FIG. 2 . FIG. 3 is a perspective view of the insulator of FIG. 2 . FIG. 3 is a perspective view of another insulator of FIG. 2 . FIG. 3 is a perspective view of the inner core of FIG. 2 .

Below, an embodiment of the present invention will be described in detail with reference to the drawings. Fig. 1 is a longitudinal side view of an electric compressor 1 of an embodiment equipped with an electric compressor motor 4 of the present invention, Fig. 2 is an exploded perspective view of a stator 21 of the electric compressor motor 4, Fig. 3 is a plan sectional view of an inner core 26, Fig. 4 is a perspective view of an insulator 33, Fig. 5 is a perspective view of an insulator 34, and Fig. 6 is a perspective view of an inner core 26. Fig. 2 shows a schematic view of the shapes of the

inner wall portions

38, 43 and the

outer wall portions

39, 44 of the

insulators

33, 34. Fig. 3 also shows half of the inner core 26.

In FIG. 1, the electric compressor 1 of the embodiment is a scroll-type electric compressor that houses a scroll compression element 3 and an electric compressor motor 4 of the present invention in a container 2. The scroll compression element 3 as an embodiment of the compression element is composed of a fixed scroll 6 fixed to the container 2 and a movable scroll 7 that revolves around the fixed scroll 6 without rotating due to a rotating shaft 8 of the electric compressor motor 4, and is arranged so that a spiral wrap 11 formed on the fixed scroll 6 and a spiral wrap 12 formed on the movable scroll 7 mesh with each other.

The refrigerant is introduced into the container 2 through a refrigerant introduction passage (not shown) and is sucked from the outside into the compression chamber formed between the two

wraps

11, 12. This compression chamber narrows toward the center due to the orbital motion of the movable scroll 7, so the sucked in refrigerant is compressed and discharged from the center through the discharge chamber 14 and a refrigerant discharge passage (not shown). In addition, because the pressure inside the container 2 is low, the refrigerant also passes around the electric compressor motor 4, which is cooled by this refrigerant.

Next, the electric compressor motor 4 of the present invention will be described. The electric compressor motor 4 of the embodiment is a permanent magnet synchronous motor, and is composed of a stator 21 consisting of a core 22 and windings 23, and a magnet-embedded rotor 24 (made of multiple laminated electromagnetic steel sheets) that is fixed to the rotating shaft 8 and rotates inside the stator 21.

The core 22 of the stator 21 is divided into two parts: an inner core 26 having multiple teeth 27 (a number corresponding to the number of poles; 12 in this embodiment) and an outer core 28, and the

tip ends

27A, 27A of

adjacent teeth

27, 27 of the inner core 26 are connected to each other by a bridge portion 29. As a result, the slots 31 between each tooth 27 of the inner core 26 are open toward the outside (outside in the radial direction of the stator 21) and closed toward the center (toward the center in the radial direction of the stator 21).

The inner core 26 and outer core 28 are constructed by stacking and bonding multiple electromagnetic steel sheets. In addition, the outer core 28 has the same number of mating recesses 32 as the teeth 27 of the inner core 26 formed on its inside.

Meanwhile, the winding 23 is pre-wound around insulators (bobbins) 33, 34 made of insulating material, and mounting holes 36 are formed on the inside of these

insulators

33, 34 into which the teeth 27 of the inner core 26 are inserted. In this embodiment, the

insulators

33, 34 are made by injection molding of hard synthetic resin such as PET (polyethylene terephthalate) or PEN (polyethylene naphthalate).

In addition, in this embodiment, two types of insulators are prepared: an insulator 33 having an inner insulating sheet portion 41 and an outer insulating sheet portion 42 described later, and a normal insulator 34 that does not have such insulating sheet portions (41, 42). First, the insulator 33 (insulator having an inner insulating sheet portion) has a winding portion 37 that has the mounting hole 36 on the inside and has the winding 23 applied (wound) on its outer surface. Note that the winding 23 is not shown in FIG. 4), an inner wall portion 38 located at the inner end of the winding portion 37, i.e., the end portion that is on the inside in the radial direction of the stator 21, and an outer wall portion 39 located at the outer end of the winding portion 37, i.e., the end portion that is on the outside in the radial direction of the stator 21.

The inner wall portion 38 and the outer wall portion 39 of the insulator 33 are shaped to protrude outward from the winding portion 37 and prevent the winding 23 from falling off the winding portion 37. Furthermore, thin inner insulating sheet portions 41 are formed to protrude outward from both ends of the inner wall portion 38 of the insulator 33, i.e., both ends of the inner wall portion 38 in the circumferential direction of the stator 21, and thin outer insulating sheet portions 42 are formed to protrude outward from both ends of the outer wall portion 39, i.e., both ends of the outer wall portion 39 in the circumferential direction of the stator 21. The inner insulating sheet portions 41 and the outer insulating sheet portions 42 are molded integrally with the inner wall portion 38 and the outer wall portion 39 during injection molding of the winding portion 37, the inner wall portion 38, and the outer wall portion 39 of the insulator 33.

The inner insulating sheet portion 41 and the outer insulating sheet portion 42 are flexible and have a thickness (thinness) sufficient to ensure insulation, and in particular, the inner insulating sheet portion 41 can be folded toward the outer wall portion 39 starting from the connection portion with the inner wall portion 38. Possible structures that allow this folding include making the sheet thin enough to bend without breaking, or making only the connection portions with both ends of the inner wall portion 38 extremely thin.

In addition, when the inner insulating sheet portion 41 is folded toward the outer wall portion 39 starting from the connection point with the inner wall portion 38, it has a dimension (projecting dimension) that allows it to cover the windings 23 wound on the winding portion 37. On the other hand, the outer insulating sheet portion 42 has a shorter dimension (projecting dimension) than the inner insulating sheet portion 41, and is configured so that it can be positioned between the adjacent insulators 34 when the

insulators

33 and 34 are attached to the teeth 27.

On the other hand, the insulator 34 also has the mounting hole 36 on the inside, and a winding portion 37 similar to the insulator 33 on the outside of which the winding 23 is applied (wound), an inner wall portion 43 located at the inner end of the winding portion 37, i.e., the end that is the inner side in the radial direction of the stator 21, and an outer wall portion 44 located at the outer end of the winding portion 37, i.e., the end that is the outer side in the radial direction of the stator 21. However, the inner wall portion 43 and the outer wall portion 44 do not have the inner insulating sheet portion 41 and the outer insulating sheet portion 42 formed thereon, as in the insulator 33. In other words, the insulator 34 is a conventional (normal) insulator.

Next, the assembly procedure (manufacturing method) of the stator 21 will be described. When assembling the stator 21, first, the inner core 26 and the outer core 28 are formed by stacking and bonding electromagnetic steel sheets. Then, the windings 23 are wound around the outer surfaces of the winding portions 37 of the

insulators

33 and 34, and six insulators 33 and six insulators 34 are prepared for a total of 12 insulators.

In this case, as described above, the inner insulating sheet portion 41 of the insulator 33 protrudes outward from both ends of the inner wall portion 38. Also, the outer insulating sheet portion 42 protrudes outward from both ends of the outer wall portion 39 of the insulator 33, so the outer surface of the winding portion 37 is open outward all around. Therefore, even if the inner insulating sheet portion 41 and the outer insulating sheet portion 42 are formed, the winding 23 can be wound (wound) around the outer surface of the winding portion 37 of the insulator 33 without any hindrance.

Of the

insulators

33, 34 with the windings 23 wound around them in this way, the insulator 34 is attached to the teeth 27 from the outside of the inner core 26, i.e., from the outside in the radial direction of the stator 21. At this time, the insulator 34 is attached to the teeth 27 from the outside by inserting the teeth 27 of the inner core 26 into the attachment holes 36 of the insulator 34. A total of six insulators 34 are attached to every other tooth 27.

Next, the insulators 33 with the windings 23 are attached to the teeth 27 from the outside of the inner core 26, i.e., from the outside in the radial direction of the stator 21. At this time, the teeth 27 without the insulators 34 attached are inserted into the attachment holes 36 of the insulators 33, so that a total of six insulators 33 are attached to the teeth 27 from the outside.

When the insulators 33 are attached to the teeth 27 from the outside in this way, as the tips of the teeth 27 begin to enter the mounting holes 36, the inner insulating sheet portions 41 that protrude outward from both ends of the inner wall portion 38 first come into contact with the

adjacent insulators

34, 34 on both sides. Then, as the insulators 33 are further pushed toward the inner core 26 to insert the teeth 27 into the mounting holes 36, the inner insulating sheet portions 41 on both sides are bent toward the outer wall portion 39 starting from the connection points with the inner wall portions 38.

When the insulator 33 is pushed into a specified position, the inner insulating sheet portion 41 is completely bent as shown in Figures 3 and 6, and is positioned between the winding 23 wound around the insulator 33 and the windings 23 wound around the

insulators

34, 34 on either side of it. On the other hand, the outer insulating sheet portion 42 is positioned between the insulator 33 and the

insulators

34, 34 adjacent to it on either side, as shown in Figures 2 and 6.

In this way, the windings 23 are wound around the inner core 26. Next, the inner core 26 with the windings 23 wound around it is fitted into the outer core 28. At this time, the outer ends of each tooth 27 of the inner core 26 are fitted into each fitting recess 32 of the outer core 28, thereby integrating the inner core 26 and the outer core 28.

In this way, the outer core 28 is joined to the outside of the inner core 26, forming a magnetic path. In this state, the outer insulating sheet portion 42 is positioned between the windings 23 of each

insulator

33, 34 and the outer core 28, as shown in Figures 2 and 6. The windings 23 of each

insulator

33, 34 are wired to form a specified electrical circuit.

As described above, in the present invention, the insulator 33 integrally comprises the winding portion 37 on which the winding 23 is wound, the inner wall portion 38 located inside the winding portion 37 in the radial direction of the stator 21, and the inner insulating sheet portion 41 protruding outward from the inner wall portion 38, and this inner insulating sheet portion 41 is located between

adjacent windings

23, 23 when the insulator 33 is attached to the teeth 27. Therefore, by integrating the insulator 33 on which the winding 23 is wound and the inner insulating sheet portion 41 located between the windings 23, it is possible to reduce the number of parts and simplify the assembly process. Furthermore, by integrating them, it is possible to prevent failures such as the inner insulating sheet portion 41 becoming detached due to vibration.

In addition, since the inner insulating sheet portion 41 is configured to protrude outward from the inner wall portion 38, the winding 23 can be wound around the winding portion 37 without any problems. In the present invention, the inner insulating sheet portion 41 is integrally formed with the inner wall portion 38 of the insulator 33, so that when the stator 21 is attached to the teeth 27 from the outside in the radial direction, the inner insulating sheet portion 41 is folded by the

adjacent insulators

34, 34 and positioned between the

adjacent windings

23, 23. This makes it possible to improve the ease of assembly.

In particular, in the embodiment, the inner insulating sheet portion 41 is formed so as to protrude outward integrally from both ends of the inner wall portion 38 in the circumferential direction of the stator 21, and an insulator 33 having such inner insulating sheet portion 41 and another insulator 34 not having the inner insulating sheet portion 41 are prepared, and the insulator 33 having the inner insulating sheet portion 41 and the insulator 34 not having the inner insulating sheet portion 41 are arranged alternately in the circumferential direction of the stator 21. Therefore, after the insulators 34 not having the inner insulating sheet portion 41 are attached to the teeth 27 alternately, the insulator 33 having the inner insulating sheet portion 41 is attached to the teeth 27 from the outside in the radial direction of the stator 21 so that the inner insulating sheet portion 41 is folded, thereby making it possible to simultaneously attach the insulator 33 to the teeth 27 and fold the inner insulating sheet portion 41.

If only the insulator 33 having the inner insulating sheet portion 41 is used, it would be necessary to first fold the inner insulating sheet portion 41 of the insulator 33 that is attached to the teeth 27. However, by using the configuration as in the embodiment, this step becomes unnecessary, and the ease of assembly can be significantly improved through automation.

Furthermore, in the embodiment, the insulator 33 having the inner insulating sheet portion 41 is integrally formed with the outer wall portion 39 located outside the winding portion 37 in the radial direction of the stator 21, and the outer insulating sheet portion 42 extending outward from the outer wall portion 39. The outer insulating sheet portion 42 extends outward integrally from both ends of the outer wall portion 39 in the circumferential direction of the stator 21 and is positioned between the winding 23 and the outer core 28, thereby insulating the winding 23 from the outer core 28 and further improving the insulation.

In this case, in the embodiment, the outer insulating sheet portion 42 is configured to protrude outward from the outer wall portion 39 with a dimension that is positioned between the insulator 33 having the inner insulating sheet portion 41 and the adjacent insulator 34 not having the inner insulating sheet portion 41, so that there is no interference between the outer insulating sheet portion 42 and the outer core 28 when joining the inner core 26 to the outer core 28.

In this case, the outer insulating sheet portion 42 also projects outward from the outer wall portion 39, so the winding 23 can be wound around the winding portion 37 without any problems. And by constructing the electric compressor 1 by storing the electric compressor motor 4 and scroll compression element 3 of the present invention in the container 2, it is possible to obtain an electric compressor 1 with stable performance and few breakdowns.

In the embodiment, the present invention is applied to a scroll electric compressor, but the motor 4 of the present invention is suitable for various electric compressors such as rotary electric compressors.

1 Electric compressor 2 Container 3 Scroll compression element (compression element)
Reference Signs List 4 Motor for electric compressor 8 Rotating shaft 21 Stator 22 Core 23 Winding 24 Rotor 26 Inner core 27 Teeth 28

Outer core

33, 34 Insulator 36 Mounting hole 37 Winding portion 38 Inner wall portion 39 Outer wall portion 41 Inner insulating sheet portion 42 Outer insulating sheet portion

Claims

A motor for an electric compressor, in which a stator core is composed of an inner core having a plurality of adjacent teeth and an outer core which is joined to the outside of the inner core to form a magnetic path, and insulators with windings are attached to each of the teeth,
the insulator integrally includes a winding portion on which the winding is wound, an inner wall portion located inside the winding portion in a radial direction of the stator, and an inner insulating sheet portion protruding outward from the inner wall portion,
The motor for an electric compressor is characterized in that the inner insulating sheet portion is positioned between adjacent windings when the insulator is attached to the teeth.
The motor for an electric compressor according to claim 1, characterized in that the insulator is constructed by integral molding of the winding portion, the inner wall portion, and the inner insulating sheet portion of a hard resin.
The inner insulating sheet portion protrudes outward integrally from both ends of the inner wall portion in the circumferential direction of the stator, and
the insulator has the inner insulating sheet portion, and another insulator does not have the inner insulating sheet portion,
2. The motor for an electric compressor according to claim 1, wherein an insulator having the inner insulating sheet portion and an insulator not having the inner insulating sheet portion are arranged alternately in the circumferential direction of the stator.
the insulator having the inner insulating sheet portion integrally includes an outer wall portion located outside the winding portion in a radial direction of the stator, and an outer insulating sheet portion protruding outward from the outer wall portion,
4. The motor for an electric compressor according to claim 3, wherein the outer insulating sheet portion protrudes outward integrally from both ends of the outer wall portion in the circumferential direction of the stator and is positioned between the winding and the outer core.
The motor for an electric compressor according to claim 4, characterized in that the outer insulating sheet portion protrudes outward from the outer wall portion with a dimension that is between an insulator having the inner insulating sheet portion and an adjacent insulator that does not have the inner insulating sheet portion.
An electric compressor comprising the electric compressor motor according to any one of claims 1 to 5, the electric compressor motor and a compression element being housed in a container.
After attaching the insulators not having the inner insulating sheet portion to every other tooth,
A manufacturing method for a motor for an electric compressor as described in any one of claims 3 to 5, characterized in that an insulator having the inner insulating sheet portion is attached to the teeth from the radial outside of the stator so that the inner insulating sheet portion is bent.
A method for manufacturing a motor for an electric compressor, the method comprising the steps of: a stator core including an inner core having a plurality of adjacent teeth; and an outer core that is connected to the outside of the inner core to form a magnetic path; and mounting an insulator having a winding on each of the teeth, the method comprising the steps of:
preparing an insulator having integrally therewith a winding portion on which the winding is wound, an inner wall portion located inside the winding portion in the radial direction of the stator, and an inner insulating sheet portion protruding outward from both ends of the inner wall portion in the circumferential direction of the stator, and another insulator not having the inner insulating sheet portion;
After attaching the insulators not having the inner insulating sheet portion to every other tooth,
A manufacturing method for a motor for an electric compressor, characterized in that an insulator having an inner insulating sheet portion is attached to the teeth from the radial outside of the stator so that the inner insulating sheet portion is bent, thereby positioning the inner insulating sheet portion between adjacent windings.