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. 05, 2003
Filed:
Dec. 05, 2001
Applicant:
Inventors:
Felix Franck, Munich, DE;
Helmut Haeusser-Boehm, Munich, DE;
Joachim Muehlschlegel, Groebenzell, DE;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 3/24 ; H02M 5/45 ;
U.S. Cl.
CPC ...
H02M 3/24 ; H02M 5/45 ;
Abstract
Electronic transformers with a self-excited half bridge can be destroyed by high-voltage pulses from the mains supply lead. This can happen by the high-voltage pulse initiating a starting operation which leads to cross currents. This destruction mechanism is suppressed by specifically discharging a starting capacitor.