SEGMENTAL STATOR, ELECTRIC MOTOR HAVING THE SAME, AND HOUSEHOLD APPLIANCE

• US 20170207674A1
• Filed: 06/25/2015
• Published: 07/20/2017
• Est. Priority Date: 07/31/2014
• Status: Active Grant

• Current Assignee: GD Midea Environment Appliances Manufacturing Company Limited (Midea Group Co., Ltd), Midea Group Co., Ltd
• Original Assignee: GD Midea Environment Appliances Manufacturing Company Limited (Midea Group Co., Ltd), Midea Group Co., Ltd
• Inventors: PENG, Yingqing, HAN, Zhanfei, LI, Jianxiong, WANG, Zhigang
• Granted Patent: US 10,404,122 B2
• Time in Patent Office: Days
• CPC Class Codes: H02K 1/148 Sectional cores H02K1/141 takes precedence
• CPC Class Codes: H02K 17/06 having windings arranged for permitting pole-changing
• CPC Class Codes: H02K 17/08 Motors with auxiliary phase obtained by externally fed auxiliary windings, e.g. capacitor motors
• CPC Class Codes: H02K 2201/15 Sectional machines
• CPC Class Codes: H02K 2203/03 Machines characterised by the wiring boards, i.e. printed circuit boards or similar structures for connecting the winding terminations
• CPC Class Codes: H02K 2203/09 Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations
• CPC Class Codes: H02K 3/18 Windings for salient poles
• CPC Class Codes: H02K 3/28 Layout of windings or of connections between windings windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32
• CPC Class Codes: H02K 3/522 for generally annular cores with salient poles

Abstract

A segmental stator, an electric motor have same and a household appliance are provided. The segmental stator includes: a plurality of main windings, a plurality of secondary windings, a plurality of winding needles and a wiring board. Each of the main winding and the secondary winding includes a core segment and a winding frame, and the winding frames of the main winding and secondary winding are wound with a main winding wire and a secondary winding wire respectively. The main windings include at least one first main winding separately wound with one main winding wire and at least two second main windings continuously wound with one main winding wire. The plurality of secondary windings include at least one or more of the following: at least one first secondary winding separately wound with one secondary winding wire and at least two second secondary windings continuously wound with one secondary winding wire.

Claims

1. A segmental stator, comprising:

a plurality of main windings and a plurality of secondary windings, wherein each of the main winding and the secondary winding comprises a core segment and a winding frame disposed to the core segment, the core segments of the main windings and the core segments of the secondary windings are staggered and connected with one another in a circumferential direction to form an annular shape, the winding frame of the main winding and the winding frame of the secondary winding are wound with a main winding wire and a secondary winding wire respectively, in which the plurality of main windings comprise at least one first main winding and at least two second main windings, each first main winding is separately wound with one main winding wire, and the at least two second main windings are continuously wound with one main winding wire;

the plurality of secondary windings comprise at least one or more of the following;

at least one first secondary winding and at least two second secondary windings, each first secondary winding is separately wound with one secondary winding wire, and the at least two second secondary windings are continuously wound with one secondary winding wire;

a plurality of winding needles disposed on the winding frames respectively to lead out wire heads of corresponding main winding wires or secondary winding wires respectively; and

a wiring board mounted to the plurality of main windings and the plurality of secondary windings that are connected in the annular shape, and an upper end of the winding needle passing through the wiring board.

2. The segmental stator according to claim 1, wherein four main windings are provided, and four secondary windings are provided.

3. The segmental stator according to claim 1, wherein the main windings comprise one first main winding and rest of the main windings are the second main windings, and the secondary windings comprise one first secondary winding and rest of the secondary windings are the second secondary windings.

4. The segmental stator according to claim 1, wherein the main windings comprise one first main winding and rest of the main windings are the second main windings, and the secondary windings only comprise a plurality of second secondary windings.

5. The segmental stator according to claim 4, wherein the plurality of winding needles comprise:

two first winding needles disposed to the winding frame of the first main winding;

two second winding needles respectively disposed to winding frames of two second main windings farthest away from each other among the second main windings; and

two third winding needles respectively disposed to winding frames of two adjacent second secondary windings.

6. The segmental stator according to claim 5, wherein each winding frame comprises:

an upper frame comprising an upper outer arc plate and an upper inner arc plate, in which the upper inner arc plate is disposed at a radially inner side of the upper outer arc plate via a first connecting portion, winding posts are provided at two ends of a top of the upper inner arc plate, and tops of the upper outer arc plate and the upper inner arc plate of the upper frame are respectively provided with two hollow first patch posts spaced apart from each other; and

a lower frame comprising a lower outer arc plate and a lower inner arc plate, in which the lower inner arc plate is disposed at a radially inner side of the lower outer arc plate via a second connecting portion, bottoms of the lower outer arc plate and the lower inner arc plate of the lower frame are provided with two hollow second patch posts spaced apart from each other;

wherein the upper frame is inserted into a top of the lower frame, and a corresponding core segment is fitted over a junction of the upper frame and the lower frame;

wherein the two first winding needles are respectively disposed in the first patch posts on the tops of the upper outer arc plate and the upper inner arc plate of the winding frame of the first main winding;

the two second winding needles are respectively disposed in the first patch posts on tops of upper inner arc plates of winding frames of two second main windings farthest away from each other among the second main windings;

the two third winding needles are respectively disposed in the second patch posts on bottoms of lower inner arc plates of lower frames of two adjacent secondary windings;

wherein after the secondary windings and the main windings are staggered and connected with one another, the first winding needles, the second winding needles and the third winding needles are located on the same plane and all connected to the wiring board.

7. The segmental stator according to claim 6, wherein the upper outer arc plate is flush with the lower outer arc plate in an up-and-down direction, and the upper inner arc plate is flush with the lower inner arc plate in the up-and-down direction.

8. The segmental stator according to claim 1, wherein two ends of each core segment is provided with a first positioning portion and a second positioning portion, in which the first positioning portion of one main winding and the second positioning portion of the secondary winding adjacent to a first side of the one main winding are mutually fitted and positioned, and the second positioning portion of the one main winding and the first positioning portion of the secondary winding adjacent to a second side of the one main winding are mutually fitted and positioned.

9. The segmental stator according to claim 1, wherein the first winding needles, the second winding needles and the third winding needles are located within a range of 180 degrees of the wiring board in the circumferential direction.

10. The segmental stator according to claim 1, wherein a top end of the core segment of the main winding is flush with a bottom end of the core segment of the secondary winding adjacent to the main winding.

11. The segmental stator according to claim 1, wherein the wiring board is configured to have a semi-annular shape.

12. An electric motor, comprising:

a rotor assembly comprising a rotor shaft and a rotor core disposed to the rotor shaft; and

a segmental stator comprising;

a plurality of main windings and a plurality of secondary windings, wherein each of the main winding and the secondary winding comprises a core segment and a winding frame disposed to the core segment, the core segments of the main windings and the core segments of the secondary windings are staggered and connected with one another in a circumferential direction to form an annular shape, the winding frame of the main winding and the winding frame of the secondary winding are wound with a main winding wire and a secondary winding wire respectively, in which the plurality of main windings comprise at least one first main winding and at least two second main windings, each first main winding is separately wound with one main winding wire, and the at least two second main windings are continuously wound with one main winding wire;

the plurality of secondary windings comprise at least one or more of the following;

at least one first secondary winding and at least two second secondary windings, each first secondary winding is separately wound with one secondary winding wire, and the at least two second secondary windings are continuously wound with one secondary winding wire;

a plurality of winding needles disposed on the winding frames respectively to lead out wire heads of corresponding main winding wires or secondary winding wires respectively; and

a wiring board mounted to the plurality of main windings and the plurality of secondary windings that are connected in the annular shape, and an upper end of the winding needle passing through the wiring board,

wherein the segmental stator is fitted over the rotor assembly and the rotor assembly is rotatable relative to the segmental stator.

13. A household appliance, comprising an electric motor according to claim 12.

14. The electric motor according to claim 12, wherein the main windings comprise one first main winding and rest of the main windings are the second main windings, and the secondary windings only comprise a plurality of second secondary windings.

15. The electric motor according to claim 14, wherein the plurality of winding needles comprise:

two first winding needles disposed to the winding frame of the first main winding;

two second winding needles respectively disposed to winding frames of two second main windings farthest away from each other among the second main windings; and

two third winding needles respectively disposed to winding frames of two adjacent second secondary windings.

16. The electric motor according to claim 15, wherein each winding frame comprises:

an upper frame comprising an upper outer arc plate and an upper inner arc plate, in which the upper inner arc plate is disposed at a radially inner side of the upper outer arc plate via a first connecting portion, winding posts are provided at two ends of a top of the upper inner arc plate, and tops of the upper outer arc plate and the upper inner arc plate of the upper frame are respectively provided with two hollow first patch posts spaced apart from each other; and

a lower frame comprising a lower outer arc plate and a lower inner arc plate, in which the lower inner arc plate is disposed at a radially inner side of the lower outer arc plate via a second connecting portion, bottoms of the lower outer arc plate and the lower inner arc plate of the lower frame are provided with two hollow second patch posts spaced apart from each other;

wherein the upper frame is inserted into a top of the lower frame, and a corresponding core segment is fitted over a junction of the upper frame and the lower frame;

wherein the two first winding needles are respectively disposed in the first patch posts on the tops of the upper outer arc plate and the upper inner arc plate of the winding frame of the first main winding;

the two second winding needles are respectively disposed in the first patch posts on tops of upper inner arc plates of winding frames of two second main windings farthest away from each other among the second main windings;

the two third winding needles are respectively disposed in the second patch posts on bottoms of lower inner arc plates of lower frames of two adjacent secondary windings;

wherein after the secondary windings and the main windings are staggered and connected with one another, the first winding needles, the second winding needles and the third winding needles are located on the same plane and all connected to the wiring board.

17. The electric motor according to claim 16, wherein the upper outer arc plate is flush with the lower outer arc plate in an up-and-down direction, and the upper inner arc plate is flush with the lower inner arc plate in the up-and-down direction.

18. The electric motor according to claim 12, wherein two ends of each core segment is provided with a first positioning portion and a second positioning portion, in which the first positioning portion of one main winding and the second positioning portion of the secondary winding adjacent to a first side of the one main winding are mutually fitted and positioned, and the second positioning portion of the one main winding and the first positioning portion of the secondary winding adjacent to a second side of the one main winding are mutually fitted and positioned.

19. The electric motor according to claim 12, wherein the first winding needles, the second winding needles and the third winding needles are located within a range of 180 degrees of the wiring board in the circumferential direction.

20. The electric motor according to claim 12, wherein a top end of the core segment of the main winding is flush with a bottom end of the core segment of the secondary winding adjacent to the main winding.