电机组件、压缩机及制冷设备

Abstract

本实用新型公开了电机组件、压缩机及制冷设备，涉及压缩机技术领域，电机组件包括转子总成和定子铁芯，定子铁芯包括定子冲片，定子冲片包括环状的定子轭部和多个定子齿，多个定子齿连接于定子轭部的内周壁并沿定子轭部的周向间隔布置，定子齿包括齿身和齿顶，齿身的一端与定子轭部连接，齿顶连接于齿身的另一端，齿顶朝向定子冲片的中心轴线的一侧壁面设有凹槽，定子齿的径向中心线穿过凹槽，凹槽的深度沿周向先增大后减小；其中，定子冲片的最小内径为D，凹槽的槽壁与定子冲片的中心轴线的最大距离为L，满足：。本实用新型的电机组件能够降低径向电磁力密度并减少谐波，从而实现减少振动并降低噪音。

Claims

1. A motor assembly, characterized in that, include: Rotor assembly; A stator core is arranged around the outer periphery of the rotor assembly. The stator core includes stator laminations, each stator lamination including an annular stator yoke and a plurality of stator teeth. The plurality of stator teeth are connected to the inner peripheral wall of the stator yoke and are arranged at intervals along the circumferential direction of the stator yoke. A winding groove is defined between two adjacent stator teeth. Each stator tooth includes a tooth body and a tooth tip. One end of the tooth body is connected to the stator yoke, and the tooth tip is connected to the other end of the tooth body. A groove is provided on one side wall of the tooth tip facing the central axis of the stator lamination. The radial center line of the stator tooth passes through the groove, and the depth of the groove first increases and then decreases along the circumferential direction. Wherein, the minimum inner diameter of the stator lamination is D, the maximum distance between the slot wall of the recess and the central axis of the stator lamination is L, and the following is satisfied: .

2. The electric machine assembly of claim 1, wherein: The maximum depth of the groove is located behind the radial centerline of the stator teeth along the rotation direction of the rotor assembly.

3. An electric machine assembly according to claim 1 or 2, characterized in that: The groove has a first end and a second end at its two ends along the circumferential direction. The second end and the first end are arranged sequentially along the rotation direction of the rotor assembly. The angle between the line connecting the first end to the center of the stator lamination and the radial center line of the stator tooth is α. The angle between the line connecting the second end to the center of the stator lamination and the radial center line of the stator tooth is β. The number of winding slots is Q, the number of pole pairs of the motor assembly is p, and the greatest common divisor of the number of winding slots Q and the number of pole pairs p is G, satisfying: ,and .

4. An electric machine assembly according to claim 1 or 2, characterized in that: The groove has a first end and a second end at its two ends along the circumferential direction. The second end and the first end are arranged sequentially along the rotation direction of the rotor assembly. The angle between the line connecting the first end and the center of the stator lamination and the radial center line of the stator tooth is α. The angle between the line connecting the second end and the center of the stator lamination and the radial center line of the stator tooth is β. The angle between the lines connecting the two ends of the tooth tip along the circumferential direction and the center of the stator lamination is γ, satisfying: .

5. The electric machine assembly of claim 1 or 2, wherein: The number of winding slots is Q, the number of pole pairs of the motor assembly is p, and the greatest common divisor of the number of winding slots Q and the number of pole pairs p is G, satisfying: 3≤G≤6.

6. The electric machine assembly of claim 5, wherein: The number Q of the stator teeth and the number p of the pole pairs satisfy: , and 2≤p≤6, 6≤Q≤18.

7. The electric machine assembly of claim 1, wherein: On a projection plane perpendicular to the central axis of the stator lamination, the projected outline of the groove wall includes arc segments and / or straight segments.

8. The electric machine assembly of claim 1, wherein: The maximum outer diameter of the stator lamination is φ, satisfying: .

9. The electric machine assembly of claim 1, wherein: The thickness of the stator lamination is 0.2 mm to 0.5 mm.

10. Compressor, characterized in that Includes the motor assembly as described in any one of claims 1 to 9.

11. A refrigeration appliance characterised in that, Includes the compressor as described in claim 10.

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