Stator

Abstract

To provide a stator which attains an increased insulation of slot paper and a fixation function of a coil and a stator core at the same time.SOLUTION: A stator 10 according to the present disclosure has a piece of multilayered slot paper 110 and an assembly-type coil 100. The coil has an insulation part 101 as a covered range and a naked electric part 102 as a non-covered range. The slot paper includes an insulation layer 112 having a first region 110A in contact with an insulation part and a second region 110B in contact with the naked electric part. The first region has two resin layers 111 in which the insulation layer is inserted, and the second region has no resin layer.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a stator, and particularly to a stator including a multilayer slot paper and having an assembled coil.

Background Art

[0002] Patent Document 1 discloses a stator coil that connects the tip of an upper conductor segment inserted into a slot from above a stator core and the tip of a lower conductor segment inserted into the slot from below the stator core within the slot via a coupling member.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] A configuration diagram and a cross-sectional view of a stator having an assembled coil are shown in FIG. 3. In the coil 100 within the stator 10, there are an insulating portion 101 which is the coated range and a bare electric portion 102 which is the non-coated range. When the area occupied by the bare electric portion 102 increases, it will lead to a decrease in the insulation between the stator cores 11.

[0005] As a countermeasure to this problem, there is a method of increasing the thickness of the slot paper having an insulating function and an adhesive function, but a separate problem is the deterioration of performance due to a decrease in the occupation ratio.

[0006] The present disclosure has been made to solve such problems, and an object thereof is to provide a stator capable of enhancing the insulation of the slot paper while achieving both the fixing function of the coil and the stator core.

Means for Solving the Problems

[0007] The stator according to the present disclosure has slot paper with a multilayer structure and has an assembled coil. The coil has an insulating portion that is a covered range and a bare electrical portion that is an uncovered range. The slot includes an insulating layer having a first region that contacts the insulating portion and a second region adjacent to the bare electrical portion. In the first region, a resin layer includes two resin layers sandwiching the insulating layer, and in the second region, there is no resin layer. Thereby, it is possible to provide a stator capable of enhancing the insulation property of the slot paper while achieving both the fixing function of the coil and the stator core.

[0008] Further, the insulating layer may have a configuration in which two first insulating layers sandwich a second insulating layer. Thereby, the insulation property of the slot paper can be enhanced.

[0009] Further, in the insulating layer, the thickness of the second region may be made larger than the thickness of the first region. Thereby, the insulation property of the slot paper can be enhanced.

Advantages of the Invention

[0010] According to the present disclosure, it is possible to provide a stator capable of enhancing the insulation property of the slot paper while achieving both the fixing function of the coil and the stator core.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Modes for Carrying Out the Invention

[0012] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. FIG. 1 shows a coil 100 and a slot paper 110 according to this embodiment. The coil 100 is an assembled coil to be incorporated into a stator core 11 shown in FIG. 3, and has an insulating portion 101 which is a coated range and a bare electric portion 102 which is an uncoated range.

[0013] The slot paper 110 has a multilayer structure, and each layer is composed of insulating paper, and has a first region 110A which is an adhesive part in contact with the insulating portion 101 and a second region 110B which is an insulation strengthening part adjacent to the bare electric portion 102.

[0014] The first region 110A has, for example, a three-layer type and a five-layer type. The three-layer type slot paper 110 has a configuration in which two resin layers 111 sandwich an insulating layer 112. The five-layer type slot paper 110 has a configuration in which two resin layers 111 sandwich two insulating layers 113, and a configuration in which the two insulating layers 113 sandwich an insulating layer 114.

[0015] The slot paper 110 has, in the first region 110A, a structure of, for example, a three-layer type and a five-layer type. The three-layer type slot paper 110 has a configuration in which two resin layers 111 sandwich an insulating layer 112. The five-layer type slot paper 110 has a configuration in which two resin layers 111 sandwich two insulating layers 113, and a configuration in which the two insulating layers 113 sandwich an insulating layer 114.

[0016] The slot paper 110 does not have the resin layer 111 in the second region 110B. Also, in the second region 110B, the thicknesses of the insulating layers 112 to 114 may be increased by the thickness of the resin layer 111. Thereby, it becomes possible to enhance the insulation property of the slot paper 110 without changing the overall thickness of the slot paper 110.

[0017] The three-layer type slot paper 110 has a configuration of three insulating layers 112 in the second region 110B. The three insulating layers 112 may be composed of the same material or different materials.

[0018] The 5-layer type slot paper 110 has a structure in the second region 110B where two insulating layers 113 sandwich the insulating layer 114, similar to the structure in the first region 110A. Also, the insulating layers 113 and 114 are preferably made thicker than these insulating layers in the first region 110A. This makes it possible to enhance the insulation property of the slot paper 110.

[0019] The resin layer 111 contains a foaming adhesive having an adhesive function. The insulating layers 112 and 113 can use a polyimide film or the like. Also, the insulating layer 114 can use an aramid nonwoven fabric or the like.

[0020] A configuration example of the 5-layer type slot paper 110 will be described with reference to FIG. 2. FIG. 2 is a cross-sectional view of the 5-layer type slot paper 110 in the first region 110A. The two insulating layers 113 sandwich the insulating layer 114 via the adhesive layer 115. The adhesive layer 115 can use a resin-based material or the like.

[0021] In this way, it is possible to provide a stator that can achieve both the function of enhancing the insulation property of the slot paper and the function of fixing the coil and the stator core.

[0022] Note that the present disclosure is not limited to the above-described embodiments, and can be appropriately modified without departing from the gist.

Explanation of Reference Numerals

[0023] 10 Stator 11 Stator Core 100 Coil 101 Insulating Portion 102 Bare Electric Portion 110 Slot Paper 110A First Region 110B Second Region 111 Resin Layer 112 Insulating Layer 113 Insulating Layer 114 Insulating Layer 115 Adhesive Layer

Claims

1. A stator having a multi-layer slot paper and a modular coil, wherein the coil has an insulated portion which is a covered range and a bare electrical portion which is an uncovered range, the slot paper includes an insulating layer having a first region in contact with the insulated portion and a second region adjacent to the bare electrical portion, in the first region, a resin layer is provided with two resin layers sandwiching the insulating layer, in the second region, without the resin layer stator.

2. The insulating layer has a configuration in which two first insulating layers sandwich a second insulating layer The stator according to claim 1.

3. In the insulating layer, the thickness of the second region is larger than the thickness of the first region The stator according to claim 1 or 2.

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