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:
Jul. 07, 1992
Filed:
Feb. 07, 1991
Georg Heinle, Erlangen, DE;
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Abstract
A control process and trigger equipment damps resonant oscillations of a parallel-resonant circuit for a pulse-controlled inverter of a current-source inverter. The pulse-controlled inverter contains turn-off current-converter switches and is linked to an inductive and to a capacitive load. This inductive and capacitive load forms a parallel-resonant circuit. A modulation mode is selected from several stored modulation modes from the system frequency (f.sub.1) of the converter current (I.sub.R). Depending upon a calculated factor (f.sub.1 /f.sub.res) and the selected modulation mode, switching angles (.alpha..sub.1, .alpha..sub.2, . . . , .alpha..sub.n) are determined depending upon system frequency by means of stored, pre-set switching angles. From these switching angles the control times for the pulse-controlled inverter are then generated. Thus, the pulse edges of a selected modulation mode can be adjusted with the system frequency as a function of frequency, enabling the resonant oscillations to be adequately damped over the entire system frequency range.