Stator

• US 20020135259A1
• Filed: 04/29/2002
• Published: 09/26/2002
• Est. Priority Date: 05/25/2000
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Schmitz, Matthias, Eggers, Wolf-Joachim, Riehl, Guenther, Pfetzer, Johannes
• Granted Patent: US 6,888,284 B2
• Time in Patent Office: Days
• US Class Current: 310/216
• CPC Class Codes: H01L 21/02 Manufacture or treatment of semiconductor devices or of parts thereof
• CPC Class Codes: H02K 1/148 Sectional cores H02K1/141 takes precedence
• CPC Class Codes: H02K 2203/12 Machines characterised by the bobbins for supporting the windings
• CPC Class Codes: H02K 3/325 for windings on salient poles, such as claw-shaped poles
• CPC Class Codes: H02K 3/522 for generally annular cores with salient poles
• CPC Class Codes: H02K 5/128 using air-gap sleeves or air-gap discs

Abstract

A stator according to the prior art is formed out of a laminated stack that is insulated by means of a plastic coating, and stator pole teeth are connected to each other in permeable fashion.

A stator (20) according to the invention comprises separate permeable stacks of individual laminations (16) that are held together by means of a plastic coating.

The return ring (30) is joined with play on the stack of individual laminations (18, 16, 1) and installed on the stack via bayonet coupling.

Claims

1. A stator (20) comprising at least one stack of individual laminations (16) that comprises at least one lamination (1), and an at least partially present plastic coating (22),

wherein the stator (20) comprises at least one core ring (70) that forms a watertight inner channel (27) and extends along a centerline (3), at least one stack of individual laminations (16) is located on the core ring (70), and the at least one stack of individual laminations (16) is held together by means of the plastic coating (22).

2. A stator according to claim 1,

wherein the core ring (70) has at least one hook-shaped projection (77) for each stack of individual laminations (16) that extends in the direction of the centerline (3) of the stator (20) on an outer surface of the core ring (70), and the hook-shaped projection (77) at least partially encompasses the stack of individual laminations (16) and forms a positive connection.

3. A stator according to claim 1 or 2,

wherein the core ring (70) has at least one protuberance (74) that extends in the direction of the centerline (3) on an outer surface of the core ring (70), and the protuberance (74) catches in a groove (58) of the stack of individual laminations (16).

4. A stator according to claim 1,

wherein the plastic coating (22) of the stator (20) is produced by means of injection molding.

5. A stator according to claim 1 or 2,

wherein at least one stack of individual laminations (16) has at least one projection (5) extending radially outward, on which an electrical winding (45) is located.

6. A stator according to claim 5,

wherein a coil form (34) is integrally molded onto at least one projection (5) of the lamination (1).

7. A stator according to claim 6,

wherein the electrical winding (45) is located on the coil form (34), the electrical winding (45) is composed of at least one coil wire, and at least one receptacle (38) is located on the plastic coating (22) that serves as an insulation displacement connection having a coil wire (48).

8. A stator according to claim 7,

wherein the at least one receptacle (38) is located on the coil form (34).

9. A stator according to one or more of the claims 6 through 8,

wherein a winding is wound in at least one plane on the coil form (34), there is a lowermost winding plane (51) of a coil form (34) that is closest to the centerline (3), and the lowermost winding plane (51) touches the plastic coating (22) only at the respective coil form (34).

10. A stator according to one or more of the claims 6 through 9,

wherein the coil form (34) has at least one winding support point (54) for a winding procedure of the coil form (34) having a winding (45).

11. A stator according to one or both of the claim 5 or 6,

wherein an external member (30) is slid onto the projections (5) of the stack of individual laminations (18).

12. A stator according to claim 11,

wherein the external member (30) is formed out of individual sheet metal layers.

13. A stator according to one or both of the claim 11 or 12,

wherein the external member (30) forms a bayonet coupling (64) with the at least one stack of individual laminations (18).

14. A stator according to one or more of the preceding claims,

wherein the stack of individual laminations (18) forms a laminated stack.