Stator applicable to a single-phase or polyphase motor, motor comprising the stator and compressor comprising the motor or the stator

Patent metadata

Field	Value
Publication number	US-10389216-B2
Application number	US-201615392350-A
Country	US
Kind code	B2
Filing date	Dec 28, 2016
Priority date	Dec 31, 2015
Publication date	Aug 20, 2019
Grant date	Aug 20, 2019

Abstract

A stator, a motor and a compressor are provided. The stator includes a stator iron core and a winding. The stator iron core includes: an annular yoke; multiple stator teeth, near ends of the stator teeth being fixedly adjacent to an inner surface of the yoke and projecting inward towards the center of the stator iron core along a radial direction of the yoke, remote ends of the stator teeth that face inward along the radial direction defining a center hole for accommodating a rotor, and the stator teeth being spaced from each other in a circumferential direction; and multiple stator slots, each stator slot being defined between two neighboring stator teeth. The winding is wound around the stator teeth and operable for generating a rotating magnetic field. The yoke has at least two cut edges at an outer periphery thereof, disposed asymmetrically relative to the center.

First claim

What is claimed is:

1. A stator applicable to a single-phase or polyphase motor, comprising:
a stator iron core, wherein the stator iron core comprises:
an annular yoke,
multiple stator teeth, near ends of the multiple stator teeth being fixedly adjacent to an inner surface of the annular yoke and projecting inward towards a center of the stator iron core along a radial direction of the annular yoke, remote ends of the stator teeth the multiple stator teeth that face inward along the radial direction defining a center hole for accommodating a rotor, and the multiple stator teeth being spaced from each other in a circumferential direction, and
multiple stator slots, each of the multiple stator slots being defined between two neighboring stator teeth; and

a winding, wound on the multiple stator teeth and operable for generating a rotating magnetic field;
wherein the annular yoke of the stator iron core has at least two cut edges at an outer periphery of the stator iron core; wherein a number of the at least two cut edges is an even number; among the even number, every two opposite cut edges are arranged as a pair in parallel on two sides of the center of the stator iron core, and the center of the stator iron core is located in middle of a connecting line between respective center points of the two opposite cut edges in each pair of the two opposite cut edges; and
wherein, on a connecting line between respective center points of at least one pair of the pairs of the two opposite cut edges, respective distances from the center of the stator iron core to the respective center points of the cut edges in said at least one pair are different.

2. The stator according to claim 1 , wherein, on the connecting line between the respective center points of the two opposite cut edges in said each pair of the two opposite cut edges, respective distances from the center of the stator iron core to the respective center points of the two opposite cut edges in said each pair of the two opposite cut edges are different.

3. The motor, comprising a rotor and a stator, wherein the rotor is rotatably disposed in the stator and is spaced apart from the stator by a distance, and the stator is the stator according to claim 2 .

4. The stator according to claim 1 , wherein arc segments between neighboring cut edges are located on the same circle on an outer periphery of the annular yoke, and a center of the circle coincides with the center of the stator iron core.

5. The motor, comprising a rotor and a stator, wherein the rotor is rotatably disposed in the stator and is spaced apart from the stator by a distance, and the stator is the stator according to claim 4 .

6. The stator according to claim 4 , wherein the arc segments between the neighboring cut edges are not evenly distributed in the circumferential direction.

7. The motor, comprising a rotor and a stator, wherein the rotor is rotatably disposed in the stator and is spaced apart from the stator by a distance, and the stator is the stator according to claim 6 .

8. The stator according to claim 1 , wherein the stator iron core is made of a laminated and stamped silicon steel sheet material.

9. The motor, comprising a rotor and a stator, wherein the rotor is rotatably disposed in the stator and is spaced apart from the stator by a distance, and the stator is the stator according to claim 8 .

10. The stator according to claim 8 , wherein the stator iron core is an integral unit manufactured by any process selected from the following:
directly stamping a silicon steel sheet on which the at least two cut edges, the multiple stator teeth, and the multiple stator slots have been machined; and
stamping a silicon steel sheet and performing edge-cutting on an outer periphery of the stamped silicon steel sheet.

11. The motor, comprising a rotor and a stator, wherein the rotor is rotatably disposed in the stator and is spaced apart from the stator by a distance, and the stator is the stator according to claim 10 .

12. A motor, comprising a rotor and a stator, wherein the rotor is rotatably disposed in the stator and is spaced apart from the stator by a distance, and the stator is the stator according to claim 1 .

13. The motor according to claim 12 , wherein an operating voltage of the motor is 200V to 575V or an operating voltage of a driver for the motor is 200V to 575V.

14. The motor according to claim 12 , wherein the motor is a fixed-frequency motor or a variable-frequency motor.

15. The motor according to claim 14 , wherein the motor is a three-phase induction motor.

16. A compressor, comprising the stator according to claim 1 or a motor, comprising a rotor and a stator, wherein the rotor is rotatably disposed in the stator and is spaced apart from the stator by a distance.

17. The compressor according to claim 16 , wherein the compressor is a scroll compressor.

18. The compressor according to claim 16 , wherein a suction port for gas suction in the compressor is configured to be close to a cut edge whose center point is closer to a center of a stator iron core than other cut edge belonging to the same pair of the two opposite cut edges.

19. A stator for a single-phase or polyphase motor, comprising:
a stator iron core, wherein the stator iron core comprises:
an annular yoke,
multiple stator teeth, near ends of the multiple stator teeth being fixedly adjacent to an inner surface of the annular yoke and projecting inward towards a center of the stator iron core along a radial direction of the annular yoke, remote ends of the multiple stator teeth that face inward along the radial direction defining a center hole for accommodating a rotor, and the multiple stator teeth being spaced from each other in a circumferential direction, and
multiple stator slots, each of the multiple stator slots being defined between two neighboring stator teeth; and

a winding, wound on the multiple stator teeth and operable for generating a rotating magnetic field;
wherein the annular yoke of the stator iron core has at least two cut edges at an outer periphery of the stator iron core, and distances from center points of neighboring cut edges to a center of the stator iron core are not all the same;
wherein a number of the at least two cut edges is an even number; among the even number, every two opposite cut edges are arranged as a pair on two sides of the center of the stator iron core; and wherein two opposite cut edges in at least one pair of the pairs of the two opposite cut edges are arranged to form an angle between the two opposite cut edges.

20. A stator for a single-phase or polyphase motor, the stator comprising:
a stator iron core, wherein the stator iron core comprises:
an annular yoke,
multiple stator teeth, near ends of the multiple stator teeth being fixedly adjacent to an inner surface of the annular yoke and projecting inward towards a center of the stator iron core along a radial direction of the annular yoke, remote ends of the stator teeth the multiple stator teeth that face inward along the radial direction defining a center hole for accommodating a rotor, and the multiple stator teeth being spaced from each other in a circumferential direction, and
multiple stator slots, each of the multiple stator slots being defined between two neighboring stator teeth; and

a winding, wound on the multiple stator teeth and operable for generating a rotating magnetic field;
wherein the annular yoke of the stator iron core has at least two cut edges at an outer periphery of the stator iron cor

Assignees

• Danfoss Tianjin Ltd

Inventors

• Tang Weiping
• Yao Li
• Liu Wanzhen
• Liu Guangqiang
• Lin Yan
• Wang Zhenyu
• Wang Meng

Classifications

• H02K9/08

  by gaseous cooling medium circulating wholly within the machine casing (H02K9/10 takes precedence) · CPC title

• F04C23/008

  Hermetic pumps · CPC title

• H02K1/14 Primary

  Stator cores with salient poles · CPC title

• H02K3/18

  Windings for salient poles · CPC title

• H02K1/165

  Shape, form or location of the slots · CPC title