Cooling of stator by corrugated hose in an electric machine

• US 6,822,352 B2
• Filed: 10/24/2003
• Issued: 11/23/2004
• Est. Priority Date: 01/25/2001
• Status: Expired due to Term

• Current Assignee: Baumüller Nürnberg GmbH
• Original Assignee: Baumueller Nuernberg Gmbh
• Inventors: Nimz, Detlef, Meister, Rudolf
• Primary Examiner(s): Waks, Joseph
• Application Number:
  US10/466,844
• Publication Number:
  US 20040130223A1
• Time in Patent Office: 396 Days
• Field of Search: 310/58, 310/64, 310/54, 310/16, 295/96
• US Class Current: 310/58
• CPC Class Codes: H02K 1/20 with channels or ducts for flow of cooling medium
• CPC Class Codes: H02K 3/24 with channels or ducts for cooling medium between the conductors
• CPC Class Codes: H02K 41/02 Linear motors; Sectional motors
• CPC Class Codes: H02K 5/203 specially adapted for liquids, e.g. cooling jackets

Abstract

A cooled stator for an electric machine including a rotating rotor wherein the stator comprises an electric sheet metal stack and one or more flexible, deformable cooling channels for guiding the flowing cooling medium in a liquid or gas form, reacting with the stacks. The one or more cooling channels being formed from one or more flexible corrugated hoses made of metal.

Claims

1. An improved cooled stator for an electric machine with a rotating rotor, which stator is formed with a magnetic laminated core and comprises at least one flexibly deformable cooling channel, which acts on the laminated core, for flowing cooling medium in a fluid state, wherein the improvement comprises the cooling channel formed with at least one flexible corrugated metal hose.

3. A stator according to claim 1 or 2, wherein winding slots are provided at the stator laminated core, wherein the corrugated hose is in the winding slots and is in contact with electrically conducting winding parts.

4. A stator according to claim 3 wherein the corrugated hose is in the laminated core under tensile stress.

5. A stator according to claim 3 wherein at least one bore is formed in the laminated core to form the cooling channel, wherein the corrugated hose is in the bore.

6. A stator according to claim 3 wherein the corrugated hose is secured to the laminated core by a casting with a heat-conductive material.

7. A stator according to claim 6, wherein the casting is a plastics material, selected from the group consisting of aluminium, tin, lead, zinc, an alloy with aluminium and an alloy with zinc.

8. A stator according to claim 3 wherein at least a portion of the corrugated hose is parallel to a rotational axis.

9. A stator according to claim 8, wherein the corrugated hose is in the region of stator shields which are attached in order to form windings extending in meander-like fashion.

10. A stator according to claim 3 wherein a corrugated hose extends parallel and transversely to a stator longitudinal direction.

11. A stator according to claim 10, wherein a single corrugated hose extends in a meander-like path and has transverse portions connected together by bent portions.

2. An improved cooled stator for an electric linear motor which is formed with a magnetic laminated core and comprises at least one flexibly deformable cooling channel, which acts on the laminated core, for flowing cooling medium, wherein the improvement comprises the cooling channel formed with at least one flexible corrugated metal hose.