Rotor winding improvement

• US 4,063,123 A
• Filed: 06/25/1975
• Issued: 12/13/1977
• Est. Priority Date: 03/22/1974
• Status: Expired due to Term

• Current Assignee: Singer Company (SVP Holdings Ltd.)
• Original Assignee: Singer Company (SVP Holdings Ltd.)
• Inventors: Jaffe, Wolfgang, Herr, John Addison
• Primary Examiner(s): Skudy, R.
• Application Number:
  US05/590,246
• Time in Patent Office: 902 Days
• Field of Search: 310/192, 310/71, 310/193, 310/85, 310/91, 310/194, 310/214, 310/40 MM, 310/208, 310/261, 310/262, 310/263, 310/264, 310/270, 310/271, 310/211, 310/66, 310/233, 310/265 , 310/234, 310/237, 310/236, 310/231, 336/197
• US Class Current: 310/270
• CPC Class Codes: H02K 3/00 Details of windings
• CPC Class Codes: H02K 3/12 arranged in slots
• CPC Class Codes: H02K 3/51 applicable to rotors only

Abstract

A rotor which utilizes winding guide discs to enable the slots of any rotor to be completely filled with wire without thereby increasing the diameter of the rotor by bulging out of the end windings. Winding guide discs having substantially the same cross section as the rotor are spaced a sufficient distance from the ends of the rotor to contain that portion of the end windings which will fill the space between the outside diameter of the rotor shaft and the minimum radial dimension of the slots in the rotor. After this space is filled, further end windings are wound from the rotor slots about corresponding apertures in the winding guide discs within the corresponding space on the disc. In the event that this corresponding space is filled further winding guide discs may be used as required to prevent the bulging of the end windings sought to be avoided. In a preferred construction the rotor core may be eliminated and the winding may be accommodated on winding guide discs; spaced by a stepped shaft, or by an insulated sleeve providing double insulation. Additional winding guide discs may be used, as required, to accommodate the end windings without bulging. The rotor assembly thus constructed may be potted or molded in plastic to provide support for the windings against centrifugal force.

Claims

1. A rotor for an electromechanical device including a cylindrical core formed with lengthwise exterior slots, said slots having a least radial dimension, electrically conductive wire wound in said slots, said electrically conductive wire forming end windings at the ends of said cylindrical core by progressing from one slot to another slot separated therefrom by at least one intervening slot, at least one winding guide disc arranged in axially spaced relation beyond each of the ends of said cylindrical core, each of said discs having substantially the same circular dimensions as said cylindrical core and having a plurality of circumferentially open apertures equal in number and substantially aligned with said slots, a portion of said end windings being accommodated in the space between said cylindrical core and said winding guide discs up to no more than said least radial dimension of said slots, a remaining portion of said end windings being accommodated at the opposite end of said winding guide discs from said cylindrical core by passing from one aperture aligned with said one slot to another aperture aligned with said another slot, said one aperture being separated from said another aperture by at least one intervening aperture aligned with said intervening slot, whereby said end windings by being axially distributed beyond said cylindrical core by said winding guide discs are accommodated within the circular dimension of said core.

2. A rotor for an electromechanical device including a substantially cylindrical member having a plurality of slots extending lengthwise along the periphery of said cylinder, said slots having a least radial dimension;

a supporting shaft extending axially of said cylindrical member;

electrically conductive material wound in said slots in a manner suitable for use in said electromechanical device, said electrically conductive material forming end windings by progressing from one slot to another slot separated therefrom by at least one intervening slot; and

means supported by said shaft for establishing electrical connection with said electrically conductive material;

wherein the improvement comprises at least one winding guide disc at each end of said cylindrical member, each of said discs having substantially the same circular dimensions as said cylindrical member, and having a plurality of circumferentially open apertures equal in number and substantially aligned with said slots, said apertures having a smallest radial dimension, means spacing said winding guide discs from said member for receiving therebetween some portion of said end windings up to no more than said least radial dimension of said slots, a second portion of said end windings being received as end windings between said discs up to no more than said smallest radial dimension of said discs by passing through one aperture aligned with said one slot to another aperture aligned with said another slot, said one aperture and said another aperture being separated by at least one intervening aperture aligned with said at least one intervening slot, a final portion of said end windings being accommodated as end windings at the opposite end of said winding guide disc furthest from said cylindrical member, whereby said end windings by being axially distributed beyond said cylindrical core by said winding guide disc are accommodated within the circular dimension of said core.

3. A rotor as claimed in claim 2 wherein said means spacing said winding guide disc from said ends of said member includes a sleeve integral with said winding guide disc.

4. A rotor as claimed in claim 3 wherein said circular member and said winding guide discs are fashioned from a substantially electrically non conductive material, and said winding guide disc includes a second integral sleeve opposite said spacing sleeve whereby said electrically conductive material is doubly insulated from said supporting shaft.

5. A rotor for an electromechanical device including a cylindrical core formed with lengthwise exterior slots, said slots having a least radial dimension, electrically conductive wire accommodated in said slots and forming end windings at the ends of said cylindrical core by progressing from one slot to another slot separated therefrom by at least one intervening slot, a commutator spaced from said core providing electrically conductive connection to said electrically conductive wire, at least one winding guide disc arranged in axially spaced relation beyond each of the ends of said cylindrical core, each of said discs having substantially the same circular dimensions as said cylindrical core, and having a plurality of circumferentially open apertures equal in number and substantially aligned with said slots, a portion of said end windings being accommodated as end windings in the space between said cylindrical core and said winding guide disc up to no more than said least radial dimension, a remaining portion of said end windings being accommodated as end windings at the opposite end of said winding guide discs from said cylindrical core by passing through one aperture aligned with said one slot to another aperture aligned with said another slot, said one aperture and said another aperture being separated by at least one intervening aperture aligned with said at least one intervening slot, whereby said end windings by being axially distributed beyond said cylindrical core by said winding guide discs are accommodated within the circular dimension of said core.

6. A rotor for an electromechanical device including a substantially cylindrical member having a plurality of slots extending lengthwise along the periphery of said cylinder, said slots having a least radial dimension;

a supporting shaft extending axially of said cylindrical member;

electrically conductive material wound in said slots in a manner suitable for use in said electricalmechanical device, said electrically conductive material forming end windings by progressing from one slot to another slot separted therefrom by at least one intervening slot; and

a commutator supported on said shaft spaced from said member and providing electrically conductive connection to said electrically conductive wire;

wherein the improvement comprises at least one winding guide disc at each end of said cylindrical member, each of said discs having substantially the same circular dimensions as said cylindrical member and having a plurality of circumferentially open apertures equal in number and substantially aligned with said slots, said apertures having a smallest radial dimension, means spacing said winding guide discs from said member for receiving therebetween a first portion of said end windings up to no more than said least radial dimension of said slots, a second portion of said end windings being received as end windings between said discs up to no more than said smallest radial dimension of said discs by passing through one aperture aligned with said one slot to another aperture aligned with said another slot, said one aperture and said another aperture being separated by at least one intervening aperture aligned with said intervening slot, a final portion of said end windings being accommodated at the opposite end of said winding guide disc furthest from said cylindrical member, whereby said end windings by being axially distributed beyond said cylindrical member by said winding guide discs are accommodated within the circular dimension of said core.

7. A rotor for an electromechanical device, said rotor comprising:

a supporting shaft;

a first and a second substantially circular winding guide disc supported by said supporting shaft, each of said discs being formed with a plurality of radial apertures;

means spacing said first of said discs from said second of said discs on said shaft;

electrically conductive wire wound from said radial apertures on said first disc to said radial apertures on said second disc spanning said space, said wire progressing from one radial aperture to another radial aperture on each of said discs opposite said space in the formation of end windings.

8. A rotor for an electromechanical device, said rotor comprising:

a supporting shaft;

a first and second plurality of substantially circular winding guide discs supported by said supporting shaft, each of said discs being formed with a plurality of radial apertures;

means spacing said first plurality of discs from said second plurality of discs on said shaft;

means separating said discs within said first and second pluralities from each other;

electrically conductive wire wound in said radial apertures of discs in said first and second plurality of discs closest to each other spanning said space, a portion of said wire progressing from one radial aperture to another radial aperture on said discs closest to each other on the sides of the discs away from said space in the formation of end windings, said end windings being accommodated in the separation between said closest discs and next closest discs in the first and second plurality of discs, a remaining portion of said wire passing through corresponding radial apertures in the next closest discs to be accommodated as end windings in the separation between discs in said first and second plurality of discs.

9. A rotor as claimed in claim 8 wherein said means separating said discs within said first and second pluralities from each other includes a sleeve integral with said winding guide disc.

10. A rotor as claimed in claim 9 wherein said means spacing said first plurality of discs from said second plurality of discs on said shaft includes a sleeve supported by said shaft.

11. A rotor as claimed in claim 10 wherein said separating means and said spacing means are fashioned from a substantially electrically non conductive material whereby said electrically conductive wire is doubly insulated from said supporting shaft.

12. A rotor as claimed in claim 8 wherein said first and second plurality of substantially circular winding guide discs, said spacing means, said separating means and said electrically conductive wire are encased in an electrically non conductive material.