JP7397602B2 - stator, rotating electric machine - Google Patents

Description

Embodiments of the present invention relate to a stator and a rotating electric machine including the stator.

BACKGROUND ART Insulation is required between a plurality of coils provided in a stator of a rotating electrical machine, and as disclosed in Patent Document 1, for example, an insulating member is inserted into each coil.

Japanese Patent Application Publication No. 2000-41365

However, when an insulating member is inserted into the coil, the space between adjacent teeth parts, in other words, the space within the slot, becomes smaller due to the insulating member, which limits the flexibility of coil placement. It will be done.

Therefore, the present invention provides a stator that can suppress the amount of insulating member used and effectively utilize the limited space in the slot, and a rotating electric machine equipped with this stator.

The stator according to the present embodiment includes an annular stator main body, a plurality of teeth extending linearly from an inner circumferential surface of the stator main body, and arranged at predetermined intervals from each other. and an insulating member provided on the coil, the coil having a surface facing the other coil adjacent to the coil covered with the insulating member. an insulating member of a first form, which has a non-insulating surface that is not covered, and has an essential part and an additional part added to the essential part as the insulating member; and an insulating member having an essential part and added to the essential part a second type of insulating member having no additional portion, and the first type of insulating member and the second type of insulating member are alternately arranged along the circumferential direction of the stator main body.

A rotating electric machine according to this embodiment includes a stator according to this embodiment and a rotor rotatably provided inside the stator.

A sectional view schematically showing a configuration example of a rotating electric machine according to the present embodiment An enlarged view schematically showing a configuration example of an insulating member and its surrounding parts according to the present embodiment An enlarged view schematically showing a configuration example of an insulating member and its surrounding parts according to a modification of the present embodiment

Hereinafter, one embodiment of a stator and a rotating electrical machine will be described with reference to the drawings. The rotating electric machine 1 illustrated in FIG. 1 includes a stator 100 and a rotor 200. The stator 100 is constructed by stacking a plurality of iron core members punched from electromagnetic steel sheets in the axial direction, and has a substantially annular shape as a whole. The stator 100 includes a plurality of teeth portions 102 inside a stator main body portion 101 formed in a substantially annular shape. A coil 104 is wound around each of the plurality of teeth portions 102 .

The rotor 200 is constructed by stacking a plurality of core materials punched from electromagnetic steel sheets in the axial direction, and has an approximately cylindrical shape as a whole. A shaft 201 is fixed to the center of the rotor 200, and the rotor 200 is provided rotatably around the shaft 201 inside the stator 100. Furthermore, a plurality of permanent magnets (not shown) are embedded in the outer edge of the rotor 200. Note that the permanent magnet may be attached to the surface of the rotor 200.

Next, a configuration example of the stator 100 will be described. As illustrated in FIG. 2, the stator 100 includes a plurality of teeth portions 102 inside a stator main body portion 101 formed in a substantially annular shape. Each of the plurality of teeth portions 102 extends linearly from the inner circumferential surface of the stator main body portion 101 toward the axial center of the stator 100, in other words, toward the axial center of the rotating electrical machine 1. Further, the plurality of teeth portions 102 are arranged along the circumferential direction of the stator main body portion 101 at predetermined intervals. As a result, slots 103 having a predetermined space are formed between teeth portions 102 that are adjacent to each other in the circumferential direction of stator main body portion 101 . Note that the spacing between the plurality of teeth portions 102, in other words, the size of the slot 103 can be changed as appropriate.

Further, a coil 104 is wound around each of the plurality of teeth portions 102 . In this embodiment, the coil 104 is provided on the teeth portion 102 by a so-called concentrated winding method, in which the windings of each phase are wound one phase at a time. Further, in this embodiment, the winding forming the coil 104 is a winding having a rectangular cross-sectional shape, that is, a so-called flat wire.

The plurality of coils 104 are provided with an insulating member having a predetermined cross-sectional shape, in this case, a C-shaped insulating member 105 or an L-shaped insulating member 106. The C-shaped insulating member 105 and the L-shaped insulating member 106 are both examples of insulating members, and are made of well-known insulating materials such as aramid and nylon. Although the C-shaped insulating member 105 and the L-shaped insulating member 106 have different cross-sectional shapes, there is no big difference in their insulation performance, and they have almost or completely the same insulation performance. Although detailed illustrations are omitted, in this embodiment, the C-shaped insulating members 105 and the L-shaped insulating members 106 are alternately arranged along the circumferential direction of the stator 100.

Next, configuration examples of the C-shaped insulating member 105 and the L-shaped insulating member 106 will be described. In the following description, for convenience, the teeth portion 102 and the coil 104 on the side where the C-shaped insulating member 105 is provided are referred to as the first teeth portion 102A and the first coil 104A, and the teeth on the side where the L-shaped insulating member 106 is provided are referred to as the first tooth portion 102A and the first coil 104A. The portion 102 and the coil 104 are referred to as a second tooth portion 102B and a second coil 104B.

The C-shaped insulating member 105 has a generally C-shaped cross section when viewed in the axial direction of the stator 100, and includes a main body portion 105a inserted between the first coil 104A and the first teeth portion 102A, and a third insulating member 105. A base end side part 105b inserted between the base end side of the first coil 104A, that is, the surface opposite to the rotor 200, and the inner peripheral surface of the stator main body 101, and the distal end side of the first coil 104A, that is, the rotor. A distal end side portion 105c facing the surface on the 200 side is integrally provided.

The main body portion 105a constitutes most of the C-shaped insulating member 105, and covers the surface of the first coil 104A that faces the first teeth portion 102A. The length of the main body portion 105a constituting one side of the C-shaped insulating member 105 is slightly longer than the length of one side of the first coil 104A that the main body portion 105a faces.

The proximal side portion 105b is folded back from the proximal end of the main body portion 105a toward the first coil 104A side, that is, the side opposite to the first teeth portion 102A, and the proximal side surface of the first coil 104A. In other words, it covers the surface facing the inner circumferential surface of the stator main body portion 101. The length of the proximal side portion 105b constituting one side of the C-shaped insulating member 105 is slightly longer than the length of one side of the first coil 104A that the proximal side portion 105b faces. Note that a slight gap is formed between the first coil 104A and the inner circumferential surface of the stator main body portion 101.

The distal end side portion 105c is folded back from the distal end portion of the main body portion 105a toward the first coil 104A side, that is, the side opposite to the first teeth portion 102A, and is folded back from the distal end portion of the main body portion 105a toward the side opposite to the first teeth portion 102A. For example, the surface facing the rotor 200 is covered. The length of the distal end side portion 105c constituting one side of the C-shaped insulating member 105 is slightly longer than the length of one side of the first coil 104A that the distal end side portion 105c faces.

Further, the base end side portion 105b further integrally includes a base end side folded portion 105d. The proximal folded portion 105d is folded back from the distal end of the proximal side portion 105b toward the distal end of the first coil 104A, in other words, toward the rotor 200 side that is the opposite side to the stator main body 101. .

Further, the distal end side portion 105c further integrally includes a distal end side folded portion 105e. The tip side folded portion 105e is folded back from the tip of the tip side portion 105c toward the base end of the first coil 104A, in other words, toward the side opposite to the rotor 200, which is the stator body portion 101 side.

The distal end of the proximal folded portion 105d and the distal end of the distal folded portion 105e are spaced apart from each other. Note that it is sufficient that the proximal end folded portion 105d and the distal end folded portion 105e are at least several mm thick. Thereby, the corner on the distal end side and the corner on the base end side of the first coil 104A can be sufficiently covered.

The C-shaped insulating member 105 configured as described above covers the surface of the first coil 104A facing the first teeth portion 102A, the surface on the proximal end side, and the surface on the distal end side. ing. That is, the first coil 104A has a surface facing the first tooth portion 102A, a surface on the proximal end side, and a surface on the distal end side as insulating surfaces covered with the C-shaped insulating member 105.

Further, the C-shaped insulating member 105 does not cover most of the surface of the first coil 104A on the side opposite to the first teeth portion 102A. That is, most of the surface of the first coil 104A opposite to the first tooth portion 102A, in other words, most of the surface facing the second coil 104B adjacent to the first coil 104A, is shaped like a C. It is provided as a non-insulating surface that is not covered by the insulating member 105. Note that the first coil 104A may have a configuration in which the entire surface opposite to the first teeth portion 102A is provided as a non-insulating surface.

Further, the first coil 104A is in a state in which the insulating surface covered by the C-shaped insulating member 105 is larger than the non-insulating surface not covered by the C-shaped insulating member 105. Further, the corner portion of the first coil 104A is covered with a C-shaped insulating member 105. In this case, the first coil 104A has four corners when viewed in the axial direction of the stator 100, and all of the corners are covered with the C-shaped insulating member 105.

The L-shaped insulating member 106 has a generally L-shaped cross section when viewed in the axial direction of the stator 100, and includes a main body portion 106a inserted between the second coil 104B and the second teeth portion 102B, and a It is integrally provided with a base end side portion 106b inserted between the base end side of the single coil 104A, that is, the surface opposite to the rotor 200, and the inner circumferential surface of the stator main body portion 101. That is, the L-shaped insulating member 106 does not have a portion corresponding to the tip side portion 105c of the C-shaped insulating member 105.

The main body portion 106a constitutes most of the L-shaped insulating member 106, and covers the surface of the second coil 104B that faces the second teeth portion 102B. The length of the main body portion 106a constituting one side of the L-shaped insulating member 106 is slightly longer than the length of one side of the second coil 104B that the main body portion 106a faces.

The proximal end portion 106b is folded back from the proximal end of the main body portion 106a toward the second coil 104B, that is, the side opposite to the second teeth portion 102B, and the proximal end side surface of the second coil 104B In other words, it covers the surface facing the inner circumferential surface of the stator main body portion 101. The length of the proximal side portion 106b constituting one side of the L-shaped insulating member 106 is slightly longer than the length of one side of the second coil 104B that the proximal side portion 106b faces. Note that a slight gap is formed between the second coil 104B and the inner peripheral surface of the stator main body portion 101.

Further, the L-shaped insulating member 106 does not have a portion corresponding to the tip side portion 105c of the C-shaped insulating member 105. Therefore, the surface of the second coil 104B on the tip side, in other words, the surface facing the rotor 200 is not covered by the L-shaped insulating member 106 and is exposed.

Further, the proximal end portion 106b further integrally includes a proximal end folded portion 106d. The proximal folded portion 106d is folded back from the distal end of the proximal side portion 106b toward the distal end of the second coil 104B, in other words, toward the rotor 200 side which is the opposite side to the stator main body 101. . Note that it is sufficient to ensure that the proximal end folded portion 106d is at least several mm long. Thereby, the corner portion on the proximal end side of the second coil 104B can be sufficiently covered.

The L-shaped insulating member 106 configured as described above covers the surface of the second coil 104B that faces the second teeth portion 102B and the surface on the base end side. That is, the second coil 104B has a surface facing the second tooth portion 102B and a surface on the base end side as insulating surfaces covered with the L-shaped insulating member 106.

Further, the L-shaped insulating member 106 does not cover most of the surface of the second coil 104B opposite to the second tooth portion 102B and the surface on the tip side. That is, the second coil 104B has a large part of the surface opposite to the second tooth part 102B, in other words, a large part of the surface opposite to the first coil 104A adjacent to the second coil 104B, and the tip. The side surface is provided as a non-insulating surface that is not covered by the L-shaped insulating member 106. Note that the second coil 104B may have a configuration in which the entire surface opposite to the second tooth portion 102B is provided as a non-insulating surface.

Further, the second coil 104B is in a state where the insulating surface covered by the L-shaped insulating member 106 is larger than the non-insulating surface not covered by the L-shaped insulating member 106. Furthermore, the corners of the second coil 104B are covered with an L-shaped insulating member 106. In this case, the second coil 104B has four corners when viewed in the axial direction of the stator 100, and the three corners on the base end side are covered with the L-shaped insulating member 106. It becomes.

The reason why the L-shaped insulating member 106 does not have a portion corresponding to the tip side portion 105c of the C-shaped insulating member 105 is as follows. That is, in the first coil 104A adjacent to the second coil 104B provided with the L-shaped insulating member 106, the corner on the second coil 104B side on the distal end side is connected to the distal end side portion 105c of the C-shaped insulating member 105 and the distal end fold. It is in a state covered by the portion 105e. Therefore, even if the first coil 104A and the second coil 104B come close to each other, the C-shaped insulating member 105 can prevent the first coil 104A and the second coil 104B from coming into direct contact. . In this way, direct contact between the first coil 104A and the second coil 104B can be prevented without providing a portion corresponding to the tip side portion 105c of the C-shaped insulating member 105 in the L-shaped insulating member 106. . Therefore, in this embodiment, the L-shaped insulating member 106 does not have a portion corresponding to the tip side portion 105c of the C-shaped insulating member 105.

Furthermore, when comparing the configuration of the C-shaped insulating member 105 and the configuration of the L-shaped insulating member 106, the difference between the two is the presence or absence of portions corresponding to the distal end side portion 105c and the distal end side folded portion 105e. That is, by attaching the C-shaped insulating member 105 to one of the two adjacent coils 104, the insulating member attached to the other coil 104 corresponds to the tip side portion 105c and the tip side folded portion 105e. parts can be made unnecessary.

According to the C-shaped insulating member 105 and the L-shaped insulating member 106 configured as described above, each part can be defined as follows. That is, at least the main body portion 105a and the proximal side portion 105b of the C-shaped insulating member 105 are attached to the adjacent coils 104. It can be defined as an example of an essential part that is mandatory regardless of the situation. Further, at least the tip side portion 105c of the C-shaped insulating member 105 may be unnecessary if the type of insulating member attached to the adjacent coil 104 is a specific type, in this case, the C-shaped insulating member 105. It can be defined not as an essential part but as an example of an additional part added to an essential part.

Note that the proximal end folded portion 105d and the distal end folded portion 105e of the C-shaped insulating member 105 are components that can be arbitrarily provided on the C-shaped insulating member 105. That is, the C-shaped insulating member 105 may be configured without the proximal folded portion 105d and the distal folded portion 105e. Therefore, the proximal end folded portion 105d and the distal end folded portion 105e can also be defined as an example of an additional portion rather than an essential portion.

Further, at least the main body portion 106a and the proximal side portion 106b of the L-shaped insulating member 106 are attached to the adjacent coils 104, and the type of the insulating member is either the C-shaped insulating member 105 or the L-shaped insulating member 106. It can be defined as an example of an essential part that is mandatory regardless of the situation. Note that the proximal folded portion 106d of the L-shaped insulating member 106 is a component that can be arbitrarily provided on the L-shaped insulating member 106. That is, the L-shaped insulating member 106 may be configured without the proximal folded portion 106d. Therefore, the proximal folded portion 106d can be defined as an example of an additional portion rather than an essential portion.

According to the embodiment illustrated above, the first coil 104A has a non-insulating surface that is not covered by the C-shaped insulating member 105 on the surface facing the second coil 104B adjacent to the first coil 104A. are doing. Further, the second coil 104B has a non-insulating surface that is not covered by the L-shaped insulating member 106 on a surface that faces the first coil 104A adjacent to the second coil 104B. In this way, by configuring one coil 104 to have a non-insulating surface that is not covered by the insulating members 105 and 106 on the surface facing the other coil 104 adjacent to the one coil 104, the insulating member The usage amount of 105 and 106 can be suppressed as much as possible. Moreover, by suppressing the usage of the insulating members 105 and 106 to the necessary minimum in this way, the limited space within the slot 103 can be effectively utilized. Therefore, for example, it is possible to form the coil 104 in a large size.

Further, according to the present embodiment, the insulating surface of the coil 104 covered by the insulating members 105 and 106 is larger than the non-insulating surface. According to this configuration, while suppressing the amount of insulating members 105 and 106 used by forming a non-insulating surface, it is possible to secure a sufficient insulating surface, thereby preventing insufficient insulation of the coil 104. can be avoided. That is, this embodiment does not simply try to suppress the usage amount of the insulating members 105, 106, but is an embodiment in which the usage amount of the insulating members 105, 106 is suppressed as much as possible while maintaining the insulation performance of the coil 104. It is.

Further, according to this embodiment, the corners of the coil 104 are covered with insulating members 105 and 106. According to this configuration, it is possible to prevent the corners of adjacent coils 104 from coming into direct contact with each other, and the insulation of the coils 104 can be more reliably performed.

Further, according to this embodiment, the length of one side of the insulating members 105 and 106 is longer than the length of one side of the corresponding coil 104. According to this configuration, the portions of the coil 104 that should be insulated can be reliably covered with the insulating members 105 and 106, and the coil 104 can be insulated even more reliably.

Note that this embodiment is not limited to the one embodiment described above, and various extensions and changes can be made without departing from the gist thereof. For example, as illustrated in FIG. 3, the C-shaped insulating member 105 has a thickness of at least a main body part 105a and a proximal side part 105b, which are examples of essential parts, a distal side part 105c, which is an example of an additional part, and a proximal end. The side folded portion 105d and the distal end folded portion 105e may have different thicknesses. In this case, the thickness of the main body portion 105a and the proximal side portion 105b is thicker than the thickness of the distal side portion 105c, the proximal side folded portion 105d, and the distal side folded portion 105e. Further, the L-shaped insulating member 106 has a structure in which the thickness of at least the main body part 106a and the proximal side part 106b, which are examples of essential parts, and the thickness of the proximal side folded part 106d, which is an example of an additional part, are different. Good too. In this case, the thickness of the main body portion 106a and the proximal side portion 106b is thicker than the thickness of the proximal side folded portion 106d.

In this way, by reducing the thickness of the non-essential parts of the insulating members 105 and 106, the amount of insulating material used can be further suppressed. Further, by reducing the thickness of non-essential parts of the insulating members 105 and 106, it is possible to suppress the amount of insulating material used and to minimize the deterioration in the insulation performance of the insulating members 105 and 106. can.

Further, the winding wire forming the coil 104 is not limited to a so-called rectangular wire, and may be a winding wire having a round cross-sectional shape, for example. Note that, using a flat wire, the winding wire can be wound in an orderly manner, and the shape and dimensions of the formed coil 104 can be adjusted with high precision. Therefore, the distance between adjacent coils 104 can be adjusted with high precision, and in turn, the amount of reduction in insulating material can be adjusted with high precision.

Further, the shape of the insulating member is not limited to a C-shaped cross section or an L-shaped cross section, and various shapes can be used as long as the shape can suppress the amount of insulating material used while ensuring insulation of the coil 104. Can be applied.

Further, in the present embodiment, a configuration example in which the C-shaped insulating members 105 and the L-shaped insulating members 106 are arranged alternately along the circumferential direction of the stator 100 has been shown, but the present invention is not limited to this. Therefore, in the stator 100, for example, all insulating members may be C-shaped insulating members 105, or all insulating members may be L-shaped insulating members 106. Furthermore, the stator 100 may have a configuration in which several C-shaped insulating members 105 are arranged in succession, and then several L-shaped insulating members 105 are arranged in succession. Furthermore, in the case where the stator 100 includes C-type insulating members 105 and L-type insulating members 106, the number of C-type insulating members 105 and the number of L-type insulating members 106 may be the same or different. Good too.

Although one embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. This novel embodiment can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. This embodiment and its modifications are included within the scope and gist of the invention, as well as within the scope of the invention described in the claims and its equivalents.

In the drawings, 1 is a rotating electric machine, 100 is a stator, 101 is a stator main body, 102 is a teeth portion, 104 is a coil, 105 is a C-shaped insulating member (insulating member), 106 is an L-shaped insulating member (insulating member), 105a , 106a is the main body part (essential part), 105b, 106b is the proximal side part (essential part), 105c is the distal side part (additional part), 105d, 106d is the proximal folded part (additional part), 105e is the distal end The side folded portion (additional portion) 200 indicates a rotor.

Claims (6)

an annular stator body;
a plurality of teeth extending linearly from the inner circumferential surface of the stator main body and arranged at predetermined intervals;
a coil wound around each of the plurality of teeth portions;
an insulating member provided on the coil;
Equipped with
The coil has a non-insulating surface that is not covered by the insulating member on a surface facing the other coil adjacent to the coil,
As the insulating member,
an insulating member of a first form having an essential part and an additional part added to the essential part;
an insulating member of a second form that has an essential part and does not have an additional part added to the essential part;
Equipped with
A stator in which the first type of insulating member and the second type of insulating member are alternately arranged along the circumferential direction of the stator main body . The stator according to claim 1, wherein the coil has an insulating surface covered by the insulating member larger than the non-insulating surface. The stator according to claim 1 or 2, wherein a corner of the coil is covered with the insulating member. The stator according to any one of claims 1 to 3, wherein the length of one side of the insulating member is longer than the length of one side of the coil. The stator according to any one of claims 1 to 4, wherein the thickness of the essential part and the thickness of the additional part are different. A stator according to any one of claims 1 to 5,
a rotor rotatably provided inside the stator;
A rotating electrical machine equipped with

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