End winding support for an electric generator

Patent metadata

Field	Value
Publication number	US-9893584-B2
Application number	US-201514748857-A
Country	US
Kind code	B2
Filing date	Jun 24, 2015
Priority date	Jun 24, 2015
Publication date	Feb 13, 2018
Grant date	Feb 13, 2018

Abstract

An end winding support for an electric generator includes a pair of winding lead supports formed on opposite sides of a winding slot and separated by an upper slot width. Each of the winding lead supports includes a winding channel routed between a lead coupling port and the winding slot. The winding slot includes a base support and a pair of alignment members that define a transition between the base support and the winding lead supports. A lower slot width is defined along the base support between the alignment members and a ratio of the upper slot width to the lower slot width is between 1.024 and 1.053.

First claim

What is claimed is:

1. An end winding support for an electric generator, the end winding support comprising:
a pair of winding lead supports formed on opposite sides of a winding slot and separated by an upper slot width, each of the winding lead supports comprising a winding channel routed between a lead coupling port and the winding slot, wherein each of the winding lead supports further comprises a shim support groove having a shim support width and a shim support depth to install at least one shim between a main field wound assembly and a housing of a rotor assembly of the electric generator, and a ratio of the shim support width to the shim support depth is between 32.94 and 48.34; and
the winding slot comprising a base support and a pair of alignment members that define a transition between the base support and the winding lead supports, wherein a lower slot width is defined along the base support between the alignment members and a ratio of the upper slot width to the lower slot width is between 1.024 and 1.053.

2. The end winding support of claim 1 , wherein the base support further comprises a plurality of grooves aligned along an edge of the base support between the winding lead supports, the grooves establishing a spacing constraint for a first layer of winding.

3. The end winding support of claim 2 , wherein the grooves have an arcuate cross-section corresponding to a wire radius of the first layer of winding, and a ratio of a distance between each of the grooves and a radius of each of the grooves is between 1.54 and 2.66.

4. The end winding support of claim 1 , wherein the shim support width is defined orthogonal to the upper slot width and the lower slot width.

5. The end winding support of claim 4 , wherein a ratio of an end winding lead support width to the shim support width is between 1.88 and 1.92.

6. The end winding support of claim 1 , wherein a ratio of a total width of the end support winding to the upper slot width is between 2.05 and 2.09, and a ratio of the total width of the end support winding to the lower slot width is between 2.13 and 2.17.

7. A main field wound assembly for an electric generator, the main field wound assembly comprising:
a rotor core assembly;
a first end winding support coupled to a first end of the rotor core assembly;
a second end winding support coupled to a second end of the rotor core assembly axially aligned and opposite the first end of the rotor core assembly, the first and second end winding supports each comprising a pair of winding lead supports formed on opposite sides of a winding slot and separated by an upper slot width, each of the winding lead supports comprising a winding channel routed between a lead coupling port and the winding slot, the winding slot comprising a base support and a pair of alignment members that define a transition between the base support and the winding lead supports, wherein a lower slot width is defined along the base support between the alignment members and a ratio of the upper slot width to the lower slot width is between 1.024 and 1.053, wherein each of the winding lead supports further comprises a shim support groove having a shim support width and a shim support depth to install the at least one shim between the main field wound assembly and a housing of a rotor assembly of the electric generator, and a ratio of the shim support width to the shim support depth is between 32.94 and 48.34; and
a coil of wire repeatedly wound about the first end winding support, the rotor core assembly, and the second end winding support.

8. The main field wound assembly of claim 7 , wherein the base support of each of the first and second end winding supports further comprises a plurality of grooves aligned along an edge of the base support between the winding lead supports, the grooves establishing a spacing constraint for a first layer of winding the coil of wire.

9. The main field wound assembly of claim 8 , wherein the grooves have an arcuate cross-section corresponding to a wire radius of the first layer of winding, and a ratio of a distance between each of the grooves and a radius of each of the grooves is between 1.54 and 2.66 on each of the first and second end winding supports.

10. The main field wound assembly of claim 7 , wherein the shim support width is defined orthogonal to the upper slot width and the lower slot width on each of the first and second end winding supports.

11. The main field wound assembly of claim 10 , wherein a ratio of an end winding lead support width to the shim support width is between 1.88 and 1.92.

12. The main field wound assembly of claim 7 , wherein a ratio of a total width the first end winding support to the upper slot width is between 2.05 and 2.09, and a ratio of the total width of the first end winding support to the lower slot width is between 2.13 and 2.17.

13. A method of installing a main field wound assembly in an electric generator, the method comprising:
inserting the main field wound assembly into a rotor assembly of the electric generator, the main field wound assembly comprising:
a rotor core assembly;
a first end winding support coupled to a first end of the rotor core assembly;
a second end winding support coupled to a second end of the rotor core assembly axially aligned and opposite the first end of the rotor core assembly, the first and second end winding supports each comprising a pair of winding lead supports formed on opposite sides of a winding slot and separated by an upper slot width, each of the winding lead supports comprising a winding channel routed between a lead coupling port and the winding slot, the winding slot comprising a base support and a pair of alignment members that define a transition between the base support and the winding lead supports, wherein a lower slot width is defined along the base support between the alignment members and a ratio of the upper slot width to the lower slot width is between 1.024 and 1.053, each of the winding lead supports further comprises a shim support groove having a shim support width and a shim support depth to install at least one shim, and a ratio of the shim support width to the shim support depth is between 32.94 and 48.34; and
a coil of wire repeatedly wound about the first end winding support, the rotor core assembly, and the second end winding support; and

installing the at least one shim in the shim support groove between the main field wound assembly and a housing of the rotor assembly.

14. The method of claim 13 , wherein the base support further comprises a plurality of grooves aligned along an edge of the base support between the winding lead supports, the grooves establishing a spacing constraint for a first layer of winding, the grooves having an arcuate cross-section corresponding to a wire radius of the first layer of winding, and further comprising:
connecting a rotor excitation current source to the coil of wire through the lead coupling ports of the first or second end winding supports, and a ratio of a distance between each of the grooves and a radius of each of the grooves is between 1.54 and 2.66 on each of the first and second end winding supports.

15. The method of claim 13 , wherein the shim support width is defined orthogonal to the upper slot width and the lower slot width on each of the first and second end winding supports.

16. The method of claim 15 , wherein a ratio of an end winding lead support width to the shim support width is between 1.88 and 1.92.

17. The method of claim 13 , wherein a ratio of a total width the first end winding support to the uppe

Assignees

• Hamilton Sundstrand Corp

Inventors

• Koenig Andreas C
• Franklin Mark J
• Pfaffinger David

Classifications

• H02K2213/03

  Machines characterised by numerical values, ranges, mathematical expressions or similar information · CPC title

• H02K3/527 Primary

  applicable to rotors only · CPC title

• H02K15/08

  Forming windings by laying conductors into or around core parts · CPC title

• H02K1/24

  Rotor cores with salient poles {; Variable reluctance rotors} · CPC title

• H02K3/38 Primary

  around winding heads, equalising connectors, or connections thereto · CPC title