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. 16, 2005
Filed:
Nov. 04, 2002
Andreas Fritsch, Kümmersbruck, DE;
Gerd Griepentrog, Gutenstetten, DE;
Diethard Runggaldier, Stegaurach, DE;
Johann Seitz, Amberg, DE;
Andreas Fritsch, Kümmersbruck, DE;
Gerd Griepentrog, Gutenstetten, DE;
Diethard Runggaldier, Stegaurach, DE;
Johann Seitz, Amberg, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A method with which the load current and thus the load moment of an asynchronous motor that is controlled via a phase-controlled two-phase thyristor power controller, can be easily influenced so as to allow a smooth starting operation. According to a first embodiment, the ignition point is determined in the controlled phase in order to adapt the flow angles of the subsequent current half waves. According to a second embodiment, the ignition point of the subsequent current half waves is brought forward in both controlled phases.