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:
Aug. 19, 2003
Filed:
Nov. 08, 2001
Applicant:
Inventor:
Klaus Beulich, Sachsenheim, DE;
Assignee:
Robert Bosch GmbH, Stuttgart, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F 1/325 ;
U.S. Cl.
CPC ...
G05F 1/325 ;
Abstract
The electrical machine, especially a three-phase generator, has a stationary stator ( ); a rotatable rotor having an excitation coil ( ), a rotary transformer ( ) having a primary winding ( ) and a secondary winding ( ) on respective soft ferrite cores and magnetically coupled with each other via an air gap ( ) and a control circuit ( ) for loading the primary winding ( ) of the rotary transformer ( ) with an alternating current. The control circuit ( ) includes an input-side current limiting circuit ( ), whereby an integrated temperature control is obtained in cooperation with the soft ferrite cores of the primary and secondary windings according to the Curie effect.