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:
Dec. 22, 2015
Filed:
Apr. 12, 2012
Joachim Denk, Berlin, DE;
Hans-georg Köpken, Erlangen, DE;
Dietmar Stoiber, Fürth, DE;
Frank Viering, Fürth, DE;
Joachim Denk, Berlin, DE;
Hans-Georg Köpken, Erlangen, DE;
Dietmar Stoiber, Fürth, DE;
Frank Viering, Fürth, DE;
SIEMENS AKTIENGESELLSCHAFT, München, DE;
Abstract
In a method for operating a three-phase inverter of a converter-fed magnetic bearing, two coils are connected to respective outputs of the three-phase inverter at one end and are connected to each other and to a third output of the three-phase inverter at the other end. A variable control current is injected into the third output. A constant bias current flows between the respective outputs and thus serially through the two coils. The control current is divided among the two respective outputs so as to flow parallel through the two coils. This arrangement significantly reduces the effective current load of the three-phase inverter and significantly increases the slew rate of the control current.