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| Electric rotating machine for vehicle |
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| Electric motor construction |
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| Molecular vacuum pump with a gas-cooled rotor |
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High temperature super-conducting rotor having a vacuum vessel and electromagnetic shield and an assembly method
| Details |
Inventors: Wang, Yu; Weeber, Konrad Roman; Sivasubramaniam, Kiruba; Nygard, Robert John; Huang, Xianrui;
Assignee: General Electric Company (Schenectady, NY)
Primary Examiner: Le; Dang
Assistant Examiner:
Attorney, Agent or Firm: Nixon & Vanderhye, P.C.
A rotor is disclosed for a super-conducting synchronous machine including: a rotor core; a super-conducting coil extending around at least a portion of the rotor core, said coil having coil side sections on opposite sides of said rotor core; a vacuum housing covering at least one of said coil side sections, and a conductive shield over said vacuum housing and coil side sections. |
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DETAILED DESCRIPTION OF THE INVENTION FIG.
1 shows an exemplary synchronous generator machine 10 having a stator 12 and a rotor 14.
The rotor includes field winding coils that fit inside the cylindrical cavity 16 of the stator.
The rotor fits inside the cavity 16 of the stator.
As the rotor turns within the stator, a magnetic field 18 turns through the stator.
The magnetic field lines are in a plane perpendicular to the section of FIG.
1 (and can therefore not be shown in FIG.
1), generated by the rotor and rotor coils moves and rotates through the stator, and creates an electrical current in the windings of the stator coils 19.
This current is output by the generator as electrical power.
The rotor 14 has a generally longitudinally-extending axis 20 and a generally solid rotor core 22.
The solid core 22 has high magnetic permeability, and is usually made of a ferromagnetic material, such as iron.
In a low power density super-conducting machine, the iron core of the rotor is used to reduce the magnetomotive force, and, thus, minimize the amount of super-conducting (SC) wire needed for the coil winding.
For example, the solid iron rotor core may be magnetically saturated at an air-gap magnetic field strength of about 2 Tesla.
The rotor 14 supports at least one longitudinally-extending, race-track shaped, high-temperature super-conducting (HTS) coil winding 34 (see FIG.
2).
The HTS coil winding may be alternatively a saddle-shape or have some other shape that is suitable for a particular HTS rotor design.
A coil support system is disclosed here for a racetrack SC coil winding.
The coil support system may be adapted for coil configurations other than a racetrack coil mounted on a solid rotor core.
The rotor includes a collector end shaft 24, and a drive end shaft 30.
These end shafts are attached to and support the rotor core, and are themselves supported by bearings 25.
The collector end shaft may include collector rings 78 to provide an external electrical connection to the SC rotor coils
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Generators or Motors 
