阅读说明：本技术 定子、电动机、压缩机及空调装置 (Stator, motor, compressor, and air conditioner ) 是由 石川淳史 矢部浩二 于 2017-05-25 设计创作，主要内容包括：具备定子铁芯和以波状卷绕的方式卷绕于定子铁芯的绕组。绕组具有多条包覆线材的集合体和覆盖该集合体的周围并包含热固性树脂的外侧覆膜。多条包覆线材均具有导体和覆盖导体的周围的绝缘膜。多条包覆线材的线宽为1.5mm以下。(The motor includes a stator core and a winding wound around the stator core in a wave-like winding manner. The winding includes an aggregate of a plurality of coated wires and an outer coating film covering the periphery of the aggregate and containing a thermosetting resin. Each of the plurality of coated wires has a conductor and an insulating film covering the periphery of the conductor. The line width of the plurality of coated wires is 1.5mm or less.)

1. A stator, wherein,

the stator includes a stator core and a winding wound around the stator core in a wave-like winding manner,

the winding comprises an aggregate of a plurality of coated wires and an outer coating film covering the periphery of the aggregate and containing thermosetting resin,

the plurality of coated wires each have a conductor and an insulating film covering the periphery of the conductor,

the line widths of the plurality of coated wires are all below 1.5 mm.

2. The stator according to claim 1,

the thickness of the insulating film is 30 [ mu ] m or more and 50 [ mu ] m or less.

3. The stator according to claim 1 or 2,

the thickness of the outer coating is 0.1mm to 0.2 mm.

4. The stator according to any one of claims 1 to 3,

the overall cross-sectional shape of the winding is quadrilateral or circular.

5. The stator according to any one of claims 1 to 3,

the cross-sectional shape of the conductor is quadrilateral or circular.

6. The stator according to any one of claims 1 to 5,

the plurality of coated wires are two coated wires arranged in one row and two columns, three coated wires arranged in one row and three columns, four coated wires arranged in two rows and two columns, or six coated wires arranged in two rows and three columns.

7. The stator according to claim 6,

the line widths of the plurality of coated wires are all more than 1.0mm and less than 1.5 mm.

8. The stator according to any one of claims 1 to 5,

the plurality of coated wires are eight coated wires arranged in eight places excluding a central portion of the second row and the third column among the three rows and the three columns.

9. The stator according to claim 8,

the line widths of the plurality of coated wires are all more than 0.65mm and less than 1.0 mm.

10. The stator according to claim 8 or 9,

the winding includes a resin portion formed of a thermosetting resin at a central portion of the plurality of coated wires.

11. The stator according to any one of claims 1 to 10,

the outer coating is a coating formed by adding glass fibers to an unsaturated polyester resin.

12. The stator according to any one of claims 1 to 11,

the stator core has:

a yoke portion extending in a circumferential direction centered on an axis; and

teeth extending from the yoke portion toward the axis for the winding to wind,

the yoke portion is provided with a through hole that penetrates the yoke portion in the direction of the axis.

13. An electric motor, wherein the electric motor comprises:

a rotor; and

a stator as claimed in any one of claims 1 to 12 arranged to surround the rotor.

14. The motor according to claim 13, wherein,

the rotor includes a rotor core and a rare earth sintered magnet or a ferrite sintered magnet attached to the rotor core.

15. A compressor having a motor and a compression mechanism driven by the motor,

the motor has a rotor and a stator of any one of claims 1 to 12 arranged to surround the rotor.

16. An air conditioner comprising a compressor, a condenser, a pressure reducing device and an evaporator,

the compressor is provided with a motor and a compression mechanism driven by the motor,

the motor has a rotor and a stator of any one of claims 1 to 12 arranged to surround the rotor.

Technical Field

The invention relates to a stator, a motor, a compressor and an air conditioner.

Background

As a winding method of a winding of a stator in a motor, there are concentrated winding and distributed winding. In general, distributed winding, which is advantageous in terms of noise and vibration suppression as compared with concentrated winding, is used for a motor used in an air conditioner or the like. In distributed winding, concentric winding is generally used, but wave winding is advantageous over concentric winding in that the coil end can be reduced. In the case of wave winding, the winding needs to be folded back at the coil end, and therefore the winding is required to have high strength.

As a winding for distributed winding, a winding in which a flat conductor is covered with a magnetic layer and further covered with an insulating film is known (patent document 1). Also, a group winding in which a plurality of copper wires are bundled and covered with an insulating coating is known (patent document 2). Also, a winding in which a flat conductor is covered with a thermosetting resin coating and the periphery thereof is further covered with a thermoplastic resin coating is known (patent document 3).

Prior art documents

Patent document

Patent document 1: japanese patent No. 5742805 (see FIG. 3)

Patent document 2: japanese patent laid-open publication No. 2016-85846 (see FIG. 3)

Patent document 3: japanese patent laid-open publication No. 2016 and 111732 (see FIG. 1)

Disclosure of Invention

Problems to be solved by the invention

Here, in order to increase the strength of the winding, the cross-sectional area of the winding needs to be increased. When the cross-sectional area of the winding is increased, if the electric frequency is increased according to the rotation speed of the motor, the current may be concentrated on the surface of the conductor due to the skin effect, and the effective resistance (i.e., copper loss) may be increased, thereby decreasing the motor efficiency.

The present invention has been made to solve the above problems, and an object thereof is to improve the strength of a winding and reduce the substantial resistance.

Means for solving the problems

A stator includes a stator core and a winding wound around the stator core in a wave-like winding manner. The winding includes an aggregate of a plurality of coated wires and an outer coating film covering the periphery of the aggregate and containing a thermosetting resin. Each of the plurality of coated wires has a conductor and an insulating film covering the periphery of the conductor. The line widths of the plurality of coated wires are all below 1.5 mm.

Effects of the invention

In the present invention, since the winding is configured by covering a plurality of coated wires having a conductor and an insulating film with an outer coating of a thermosetting resin and having a line width of 1.5mm or less, the strength of the winding can be improved, and the skin effect can be suppressed to reduce the substantial resistance.

Drawings

Fig. 1 is a sectional view showing a motor according to embodiment 1.

Fig. 2 is a perspective view showing the motor in which the winding of embodiment 1 is not wound.

Fig. 3 is a perspective view showing a motor around which a winding of embodiment 1 is wound.

Fig. 4 is a schematic diagram (a) for explaining the dimensions of each part of the motor according to embodiment 1 and a schematic diagram (B) showing the periphery of the teeth in an enlarged manner.

Fig. 5 is a sectional view showing a sectional structure of the winding of embodiment 1.

Fig. 6 is a cross-sectional view showing a winding and a terminal portion in embodiment 1.

Fig. 7 is a perspective view showing a winding of embodiment 1.

Fig. 8 is a schematic diagram showing a part of the winding of embodiment 1 in an enlarged manner.

Fig. 9 is a perspective view showing one winding portion of the winding of embodiment 1.

Fig. 10 is a perspective view showing two winding portions of the winding of embodiment 1.

Fig. 11 is a perspective view showing a winding portion inserted into the same slot of the stator of embodiment 1.

Fig. 12 is a cross-sectional view showing a winding of a comparative example.

Fig. 13 is a graph showing current density distributions of the winding of embodiment 1 and the winding of the comparative example by comparison.

Fig. 14 is a graph showing current density distributions of the winding of embodiment 1 and the winding of the comparative example by comparison.

Fig. 15 is a graph comparing and showing effective resistances of the winding of embodiment 1 and the winding of the comparative example.

Fig. 16 is a sectional view showing a sectional structure of a winding according to a first modification.

Fig. 17 is a sectional view showing a cross-sectional structure of a winding according to a second modification.

Fig. 18 is a sectional view showing a cross-sectional structure of a winding according to a third modification.

Fig. 19 is a cross-sectional view showing a cross-sectional structure of the winding according to the fourth, fifth, and sixth modifications.

Fig. 20 is a longitudinal sectional view showing a compressor to which the motor of embodiment 1 is applied.

Fig. 21 is a diagram showing an air conditioner provided with the compressor of fig. 20.

Detailed Description