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. 13, 2002
Filed:
Jun. 04, 2001
Applicant:
Inventors:
Eric Baudelot, Weisendorf, DE;
Manfred Bruckmann, Nürnberg, DE;
Heinz Mitlehner, Uttenreuth, DE;
Benno Weis, Hemhofen, DE;
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 3/335 ;
U.S. Cl.
CPC ...
H02M 3/335 ;
Abstract
The invention provides a method by which losses are reduced during the commutation of a free-running, driven power converter valve (T ) of an invertor phase ( ) to a current-accepting power converter valve (T ) of said invertor phase ( ). The current-accepting power converter valve (T ) is switched on at the beginning of the commutation process and the free-running, driven power converter valve (T ) is rapidly switched off as soon as the value of its drain voltage (U ) is zero.