Electrical generator or motor structure – Dynamoelectric – Rotary
Utility Patent
1997-07-21
2001-01-02
Enad, Elvin (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S090500
Utility Patent
active
06169352
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates generally to a superconducting motor generator. More particularly, the invention relates to a motor generator having a high temperature superconductor rotor comprised of segments of high temperature superconductor material and in selected embodiments, the stator can include a coil composed of high temperature superconductor material.
The efficiency and power of conventional motor generator systems are quite low. In addition, the demagnetization is very inefficient in conventional permanent magnet systems because an entire domain must be switched. Furthermore, magnetic fields present in a conventional motor generator cannot be too large or demagnetization takes place very readily. Such low field sensitivity drastically limits the applications and efficiency of conventional motor generators. Further, conventional motor generators can be constructed to have an internal-dipole with an arrangement of magnetized permanent magnets disposed around the perimeter of a circle to create an internal dipole magnetic field. However, such systems are difficult to energize because the magnetic field arising from the permanent magnets can be removed only by raising the temperature to almost 100° C., which is quite a slow process. Typically, such magnetic arrays are constructed with the magnetic pieces already magnetized.
It is therefore an object of the invention to provide an improved motor generator.
It is another object of the invention to provide a novel superconducting motor generator.
It is a further object of the invention to provide an improved motor generator having a superconducting rotor.
It is also an object of the invention to provide a novel motor generator having a superconducting stator.
It is yet another object of the invention to provide an improved motor generator having a multipole stator of superconducting material.
It is an additional object of the invention to provide a novel motor generator having a superconducting rotor composed of a plurality of superconductor segments having each segment's c-axis oriented to optimize magnetization efficiency.
It is yet a further object of the invention to provide an improved motor generator having a rotor composed of a magnetized high temperature superconductor with substantially uniform current density therein.
It is still another object of the invention to provide a novel motor generator having a rotor composed of a high temperature superconductor rotor with a magnetization along the c-axis direction of the superconductor material.
It is also another object of the invention to provide an improved motor generator having a stator composed of a high temperature superconductor which can withstand large magnetic fields without demagnetization of the rotor.
Other advantages and features of the invention, together with the organization and the manner of operation thereof, will become apparent from the detailed description when taken in conjunction with the accompanying drawings, wherein like elements have like numerals throughout the drawings.
REFERENCES:
patent: 4086508 (1978-04-01), Masumoto et al.
patent: 5479059 (1995-12-01), Weinberger
Enad Elvin
Foley & Lardner
Rechtin Michael D.
University of Chicago
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