METHODS AND SYSTEM FOR CREATING SPACING BETWEEN INSULATED COILS OF ELECTRODYNAMIC MACHINES

• US 20180019631A1
• Filed: 07/14/2016
• Published: 01/18/2018
• Est. Priority Date: 07/14/2016
• Status: Active Grant

• Current Assignee: Siemens Large Drives LLC (Siemens AG)
• Original Assignee: Siemens Industry Incorporated (Siemens AG)
• Inventors: Lamberson, Ross Patrick, Beatty, Timothy David
• Granted Patent: US 10,418,874 B2
• Time in Patent Office: Days
• CPC Class Codes: H02K 15/0031 Shaping or compacting conductors in slots or around salient poles H02K15/005 takes precedence
• CPC Class Codes: H02K 15/0037 Shaping or compacting winding heads H02K15/005, H02K15/0087 and H02K15/0428 take precedence
• 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

Abstract

Methods and system for creating spacing between insulated stator coils include a spacing device with an expandable container. The expandable container is positioned and expanded between stator coil end portions in order to create a space between the insulated stator coil end portions. Insulating elements are placed in the space created between the stator coil end portions, and the expandable container removed.

Claims

1. A method for creating spacing between insulated stator coils comprising:

positioning an expandable container between stator coil end portions;

inflating the expandable container between the stator coil end portions thereby creating a space between the stator coil end portions; and

placing an insulating element in the space between the stator coil end portions.

2. The method of claim 1, further comprising:

deflating the expandable container after the placing of the insulating element, wherein the expandable container is deflated at least partially.

3. The method of claim 2, further comprising:

moving the expandable container between the stator coil end portions, repeating the steps of positioning and inflating the expandable container, and placing one or more insulating elements between the stator coil end portions.

4. The method of claim 1, further comprising:

removing the expandable container from the stator coil end portions.

5. The method of claim 1, wherein the insulating element is permanently placed between the stator coil end portions.

6. The method of claim 1, wherein the insulating element is designed as a wedge or block.

7. The method of claim 3, wherein the one or more insulating elements each comprise a defined thickness, the defined thicknesses being equal or different from each other.

8. The method of claim 1, further comprising:

coupling the expandable container to a fluid supply, wherein the fluid supply comprises compressed air or gas for the inflating of the expandable container.

9. A system for creating spacing between insulated stator coils comprising:

a spacing device comprising an expandable container, a regulator and a measuring device, the spacing device being adapted for creating spaces between insulated stator coil end portions,

wherein the expandable container is positioned and expanded between the stator coil end portions in order to create a space between the insulated stator coil end portions.

10. The system of claim 9, further comprising:

a fluid supply, wherein the spacing device is operably coupled to the fluid supply.

11. The system of claim 10, wherein the fluid supply comprises compressed air or liquid.

12. The system of claim 11, wherein the expandable container is expanded by inflation using the compressed air of the fluid supply.

13. The system of claim 9, wherein one or more insulating elements are placed in the space created between the insulated stator coil end portions.

14. The system of claim 9, wherein the expandable container comprises a shape selected from the group consisting of rectilinear, round, oval, square, rectangle, trapezoid, pentagram, and a combination thereof.

15. The system of claim 9, wherein the insulated stator coil end portions are part of a stator winding of an AC induction machine.

16. The system of claim 15, wherein insulating elements are placed between all stator coil end portions of the stator winding using the spacing device.

17. A method for creating spacing between insulated coils comprising:

providing a spacing device comprising an expandable container;

positioning the expandable container between coil end portions of insulated coils;

expanding the expandable container between the coil end portions and creating a space between the coil end portions; and

placing an insulating element in the space created between the coil end portions.

18. The method of claim 17, further comprising:

contracting the expandable container between the coil end portions, and removing the expandable container from the coil end portions.

19. The method of claim 17, wherein the spacing device further comprises a regulator and a measuring device used for the expanding of the expandable container to a predefined pressure.

20. The method of claim 17, further comprising:

providing a fluid supply; and

operably coupling the fluid supply to the spacing device, wherein the expandable container of the spacing device is expanded by a fluid provided by the fluid supply.