초록 ▼

A permanent magnet rotor for use on an electrical generator comprises a hub having an outer peripheral surface and an inner peripheral bore centered on an axis. The inner peripheral bore is provided with a screw thread at least over a portion of an axial dimension. Permanent magnets are mounted on t

A permanent magnet rotor for use on an electrical generator comprises a hub having an outer peripheral surface and an inner peripheral bore centered on an axis. The inner peripheral bore is provided with a screw thread at least over a portion of an axial dimension. Permanent magnets are mounted on the outer peripheral surface of the hub. A containment band is positioned radially outwardly of the magnets, holding the magnets and the hub together. The hub, a generator rotor incorporating the permanent magnet rotor, and a generator incorporating the permanent magnet rotor are also disclosed and claimed in this application.

대표청구항 ▼

1. A hub for being part of a permanent magnet rotor in an electrical generator, the hub comprising: a hub body having an outer peripheral surface and an inner peripheral bore centered on an axis, said inner peripheral bore being provided with a screw thread over a portion of an axial dimension from

1. A hub for being part of a permanent magnet rotor in an electrical generator, the hub comprising: a hub body having an outer peripheral surface and an inner peripheral bore centered on an axis, said inner peripheral bore being provided with a screw thread over a portion of an axial dimension from adjacent a first end;a piloting diameter on the inner peripheral bore being of a diameter larger than a diameter of a tip of said screw thread, said piloting diameter for piloting on a shaft that is to receive said hub; andsaid hub outer peripheral surface having a polygonal shape, said polygonal shape being defined by a plurality of outer facets, and a plane can be defined perpendicular to said axis, and said plane extending through said threads on said inner peripheral bore, and through said facets. 2. The hub as set forth in claim 1, wherein torque tool holes for receiving a torque tool to drive said hub onto a rotor shaft are included in said hub. 3. The hub as set forth in claim 1, wherein a ratio of said diameter to said piloting diameter compared to the diameter to the tip of said screw threads being between 1.07 and 1.08. 4. A permanent magnet rotor for use on an electrical generator comprising: a hub having an outer peripheral surface and an inner peripheral bore centered on an axis, said inner peripheral bore being provided with a screw thread at least over a portion of an axial dimension;permanent magnets mounted on said outer peripheral surface of said hub;a containment band positioned radially outwardly of said magnets, and holding said magnets and said hub together; anda plane can be defined that is perpendicular to said axis, said plane extending through said threads on said inner peripheral bore, and through said permanent magnets. 5. The permanent magnet rotor as set forth in claim 4, wherein said inner peripheral bore also includes a piloting surface at an end beyond said threads, said piloting surface having a diameter larger than a diameter of a tip of said screw thread. 6. The permanent magnet rotor as set forth in claim 5, wherein a ratio of a diameter to said piloting surface compared to a diameter to an inner peripheral tip of said screw threads being between 1.07 and 1.08. 7. The permanent magnet rotor as set forth in claim 4, wherein said hub has torque tool holes for receiving a torque tool to drive said permanent magnet rotor onto a rotor shaft which will receive said permanent magnet rotor. 8. A generator rotor comprising: a main winding rotor mounted on a rotor shaft;a permanent magnet rotor including a hub having an outer peripheral surface and an inner peripheral cylindrical bore centered on an axis, said inner peripheral bore being provided with a screw thread at least over a portion of an axial dimension, permanent magnets mounted on said outer peripheral surface of said hub, a containment band positioned radially outwardly of said magnets, and holding said magnets and said hub together, said rotor shaft having threads received on said threads on said inner peripheral bore; anda plane can be defined that is perpendicular to said axis, said plane extending through said threads on said rotor shaft, said threads on said inner peripheral bore of said rotor hub, and through said permanent magnets. 9. The generator rotor as set forth in claim 8, wherein said inner peripheral bore of said hub includes a piloting surface at an end of said hub beyond said threads, and said rotor shaft further being provided with a mating piloting surface, said piloting surface on said inner peripheral bore of said hub having a diameter that is larger than a diameter of a tip of said screw thread on said inner peripheral bore of said hub. 10. The generator rotor as set forth in claim 9, wherein a ratio of a diameter to said piloting surface compared to a diameter to an inner peripheral tip of said screw threads on said hub being between 1.07 and 1.08. 11. The generator rotor as set forth in claim 8, wherein said hub has torque tool holes for receiving a torque tool to drive said permanent magnet rotor onto said rotor shaft. 12. A generator comprising: a main winding stator, and a stator for a permanent magnet rotor;a main winding rotor mounted on a rotor shaft;a permanent magnet rotor including a hub having an outer peripheral surface and an inner peripheral cylindrical bore centered on an axis, said inner peripheral bore being provided with a screw thread at least over a portion of an axial dimension, permanent magnets mounted on said outer peripheral surface of said hub, a containment band positioned radially outwardly of said magnets, and holding said magnets and said hub together, said rotor shaft having threads received on said threads on said inner peripheral bore; anda plane can be defined that is perpendicular to said axis, said plane extending through said threads on said rotor shaft, said threads on said inner peripheral bore of said rotor hub, and through said permanent magnets. 13. The generator as set forth in claim 12, wherein said inner peripheral bore of said hub includes a piloting surface at an end of said hub beyond said threads, and said rotor shaft further being provided with a mating piloting surface, said piloting surface on said inner peripheral bore of said hub having a diameter that is larger than a diameter of a tip of said screw thread on said inner peripheral bore of said hub. 14. The generator as set forth in claim 13, wherein a ratio of a diameter to said piloting surface compared to a diameter to an inner peripheral tip of said screw threads on said hub being between 1.07 and 1.08. 15. The generator as set forth in claim 12, wherein said hub has torque tool holes for receiving a torque tool to drive said permanent magnet rotor onto said rotor shaft.