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:
Mar. 28, 2006
Filed:
Nov. 21, 2001
Günter Ries, Erlangen, DE;
Bernd Wacker, Herzogenaurach, DE;
Günter Ries, Erlangen, DE;
Bernd Wacker, Herzogenaurach, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A boat propulsion system includes at least one propeller, at least one electric motor by which the at least one propeller can be driven, and one converter-fed power supply unit. The at least one electric motor can be supplied with electric power by the power supply unit which includes at least one prime mover and at least one generator powered by the prime mover. The at least one electric motor and the at least one generator of the power supply unit may be embodied as three-phase synchronous machines. In order to reduce the volume and weight of such a boat propulsion system while increasing its effectiveness, at least one of the electric motor and the at least one generator configured as a three-phase synchronous machine, includes a rotating excitation coil made of high-temperature super conductor wire. Each rotating excitation coil made of high-temperature super conductor wire is arranged in a vacuum-tight, insulated cryostat by which the rotating excitation coil made of high-temperature super conductor wire can be chilled to a temperature of 15 to 77 K.