Patent · US Expired

Electric machine with a rotor with a superconducting field winding

US4309632A · kind A · utility

10Cited by

7References

15Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Otto Muller · Konstanz, DE
Dieter Kullmann · Langenzenn, DE
Erich Weghaupt · Mülheim, DE

Key dates

Filing date	Sep 6, 1979
Grant date	Jan 5, 1982
Priority date	—
Expiry date	Sep 6, 1999

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S505/878
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

In an electric machine with a superconducting exciter winding and a cylindrical shaft end piece in its rotor around which end piece a nonrotating connector head part is arranged, with at least one bearing and at least one sealing device provided between these components, the radial bearing clearance is made so small that the connector head part follows the radial deflections of the shaft end piece from its ideal position relative to the axis of rotation permitting the use of seals with good sealing properties, in particular ferrofluidic seals.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.