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:
Sep. 11, 1984
Filed:
Sep. 30, 1982
Hans-Peter Schneider, Herzogenaurach, DE;
Hans-Hermann Zander, Erlangen, DE;
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Abstract
Circuitry for, and method of operating, an intermediate-link converter of the type wherein two controlled antiparallel-connected converters are connected via an intermediate link having an impressed voltage to an inverter having a plurality of addressable switches in a three-phase bridge circuit. The polarity of the intermediate-link current is interrogated 30.degree. after every change of the addressing combination of the switches of the inverter. If the interrogated polarity of the intermediate-link voltage is larger than a desired value by a predetermined amount, the converter which is arranged in the feeding-in direction is switched off and the other converter, which is arranged in the feedback direction is switched on. In this manner, a load connected to the inverter can feedback energy into a supply network via the intermediate link and a converter operating as an inverter.