Rotor for a dynamoelectric machine

Claim 2

A rotor for a dynamoelectric machine, the rotor comprising: a. a rotor body having axial slots therein; b. a rotor spindle coaxial with, and having a smaller diameter than, said rotor body; c. a plurality of coilS each having side portions, offset portions and arcuate end portions; i. said side portions being appropriately disposed in said axial slots, ii. each of said offset portions including: A. a downset portion extending axially along said rotor spindle, said downset portion having an outside edge at a predetermined radial distance from the axis of the spindle, and B. means for providing a current path between said respective side portions and said respective downset portions, and iii. each of said arcuate end portions extending circumferentially along said rotor spindle to provide a current path between respective downset portions, and each of said arcuate end portions having an outer radius substantially equal to said predetermined radial distance to the outside edge of said downset portions; and d. a plurality of circumferentially directed flanges on said rotor spindle, said flanges providing circumferentially directed slots through which said respective arcuate end portions extend, and said respective flanges having an outer radius substantially equal to the outer radius of said arcuate end portions; and e. inner retaining ring means encircling said rotor spindle and overlying said circumferentially directed flanges.

Claim 3

The rotor recited in claim 1 further including an outer ring encircling said rotor and overlying a portion of said rotor body and a portion of said inner retaining ring means.

Claim 4

The rotor recited in claim 1 wherein said inner retaining ring means is comprised of a plurality of ring members, each ring member overlying only one of said circumferentially directed flanges.

Claim 5

The rotor recited in claim 3 further including an outer ring encircling said rotor and overlying a portion of said rotor body and one of said inner retaining ring members.

Claim 6

The rotor recited in claim 1 wherein: a. the rotor is a two-pole rotor; and b. each said circumferentially directed flange extends in a 30* arc to either side of the circumferential location of the respective pole axes.

Claim 7

The rotor recited in claim 1 wherein: a. said circumferentially directed flanges have axial cooling-gas passages therethrough; b. said arcuate end portions comprise a plurality of conductors, each said conductor being rectangular in cross section and being disposed in said circumferentially directed slots with the longer side of said rectangular cross section disposed in a generally radial direction; and c. said inner retaining ring means include fan means for drawing cooling gas through said cooling-gas passages in said circumferentially directed flanges, into said circumferentially directed slots, and over said arcuate end portions disposed in said circumferentially directed slots.

Claim 8

The rotor recited in claim 4 wherein: a. said circumferentially directed flanges have axial cooling-gas passages therethrough; b. said arcuate end portions comprise a plurality of conductors, each said conductor being rectangular in cross section and being disposed in said circumferentially directed slots with the longer side of the rectangular cross section disposed in a generally radial direction; and c. said ring members each include fan means for drawing cooling gas through said cooling-gas passages in said circumferentially directed flanges, into said circumferentially directed slots, and over said arcuate end portions disposed in said circumferentially directed slots.

Claim 9

The rotor recited in claim 7 wherein: a. the rotor is a two-pole rotor; and b. each said circumferentially directed flange extends in a 30* arc to either side of the circumferential location of the respective pole axes.

Claim 10

A rotor for a dynamoelectric machine, the rotor comprising: a. a rotor body having at least two pole axes, said rotor body having a plurality of axial slots therein, said axial slots closest to said pole axes being angularly displaced a minor arc therefrom; b. a rotor spindle Coaxial with said rotor body; c. a plurality of circumferentially directed flanges on said rotor spindle, wherein: i. said circumferentially directed flanges define circumferentially directed slots therebetween, ii. said circumferentially directed flanges are centered on respective pole axes and extend to either side thereof an angular distance no greater than said minor arc to define axial recesses along said rotor spindle, and iii. said circumferentially directed flanges have an outer radius smaller than the radius of said rotor body; d. a plurality of inner retaining ring members, each said inner retaining ring member encircling said rotor spindle and overlying one of said circumferentially directed flanges; e. an outer ring encircling said rotor and overlying the end portion of said rotor body and one of said inner retaining ring members; f. a plurality of coils, each having side portions appropriately disposed in said axial slots, offset portions including downset portions disposed in said axial recesses and radially directed portions providing a current path between said respective side portions and respective downset portion, said radially directed portions being held against radial movement by said outer ring, and arcuate end portions at least partially disposed in said circumferentially directed slots, said arcuate end portions providing a current path between respective downset portions, said arcuate end portion and said downset portions being held against radial movement by said inner retaining ring members.

Claim 11

A rotor for a dynamoelectric machine, the rotor comprising: a. a rotor body having at least two pole axes, said rotor body having a plurality of axial slots therein, said axial slots closest to said pole axes being angularly displaced a minor arc therefrom; b. a rotor spindle Coaxial with said rotor body; c. a plurality of circumferentially directed flanges on said rotor spindle, wherein: i. said circumferentially directed flanges define circumferentially directed slots therebetween, ii. said circumferentially directed flanges are centered on respective pole axes and extend to either side thereof an angular distance no greater than said minor arc to define axial recesses along said rotor spindle, and iii. said circumferentially directed flanges have an outer radius smaller than the radius of said rotor body; d. a plurality of inner retaining ring members, each said inner retaining ring member encircling said rotor spindle and overlying one of said circumferentially directed flanges; e. an outer ring encircling said rotor and overlying the end portion of said rotor body and one of said inner retaining ring members; f. a plurality of coils, each having side portions appropriately disposed in said axial slots, offset portions including downset portions disposed in said axial recesses and radially directed portions providing a current path between said respective side portions and respective downset portion, said radially directed portions being held against radial movement by said outer ring, and arcuate end portions at least partially disposed in said circumferentially directed slots, said arcuate end portions providing a current path between respective downset portions, said arcuate end portion and said downset portions being held against radial movement by said inner retaining ring members.

Claim 12

The rotor recited in claim 9 wherein said minor arc is substantially equal to 30*.

Claim 13

The rotor recited in claim 9 wherein: a. said circumferentially directed flanges have axial cooling-gas passages therethrough; b. said arcuate end portions comprise a plurality of conductors, each said conductor being rectangular in cross section and being disposed in said circumferentially directed slots with the longer side of the rectangular cross section disposed in a generally radial direction; and c. said inner retaining ring members each include fan means for drawing cooling gas through said axial cooling-gas passages in said circumferentially directed flanges, into said circumferentially directed slots, and over said arcuate end portions disposed in said circumferentially directed slots.