Abstract A salient pole rotor construction which has removable pole tips to facilitate assembly and disassembly of the rotor. The removable pole tip is so constructed that centrifugal forces produced during rotation act to seat the pole tip more firmly to the rotor pole. The rotor pole bodies have an arcuate pole tip retaining slot extending along the length of the pole body. The removable pole tip consists of the pole tip portion having a surface which mates with that of the pole surface and an arcuate retaining stem which has the same curvature as the retaining slot in the pole shoe. The rotor is assembled by positioning a preformed field coil over the rotor core and then attaching the salient pole tips by inserting the arcuate stem in the retaining slot to lock the coil in place and retain it in position. By virtue of the arcuate configuration, the centrifugal forces generated by rotation force the arcuate stem of the pole tips firmly against the side of the slots thereby utilizing the centrifugal force to seat the salient pole tips firmly. By virtue of this construction, pre-formed field coils may be used simplifying the assembly of the rotor. Assembly time is reduced, while at the same time, scrap and rework losses are cut down producing highly desirable cost savings.
A process for fabricating a salient pole rotor with removable pole tips comprising the steps of: a. providing a rotor with a plurality of rotor poles having arcuate retaining slots in the pole body, b. positioning preformed windings on each of the pole bodies, c. providing pole tips having a pole tip portion and an arcuate stem portion, said stem portion adapted to frictionally engage the arcuate restraining slots of said pole bodies. d. fastening the removable pole tips to the pole bodies by rotating said arcuate pole tip stem portions in the arcuate pole body slots from the top of the slots thereby securing the pole tips to said pole body solely by means of said pole tips stem portion.
Claim 2
Dependent Claim
121 words
A process for fabricating a salient pole rotor with removable pole tips comprising the steps of: a. providing a rotor with a plurality of rotor poles having arcuate retaining slots in the pole body, b. positioning preformed windings on each of the pole bodies, c. providing pole tips having a pole tip portion and an arcuate stem portion, said stem portion adapted to frictionally engage the arcuate restraining slots of said pole bodies. d. fastening the removable pole tips to the pole bodies by rotating said arcuate pole tip stem portions in the arcuate pole body slots from the top of the slots thereby securing the pole tips to said pole body solely by means of said pole tips stem portion.
Claim 3
Dependent Claim
29 words
The process according to claim 1 in whiCh the rotor is assembled by stacking a plurality of laminations each having a plurality of rotor poles with arcuate retaining slots.