The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 10, 1981
Filed:
May. 11, 1978
Phillip W Eckels, Pittsburgh, PA (US);
Electric Power Research Institute, Inc., Palo Alto, CA (US);
Abstract
A superconducting generator is disclosed herein and includes a super cooled rotor assembly and two interconnected torque tubes constructed of a material having a thermal coefficient of linear expansion which is negligible at and below a predetermined cryogenic temperature. During normal operation of the generator, predetermined axial sections of these torque tubes are maintained at or below this cryogenic temperature. This minimizes thermal expansion of these sections and eliminates damage therefrom should the generator operate in an abnormal way which causes the torque tube sections to drop significantly in temperature. At the same time, other axial sections of the torque tubes are maintained at temperatures above this cryogenic temperature during normal operation of the generator but are coupled to an external source of heat to minimize any drop in temperature of these sections during abnormal operation.