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. 13, 1977
Filed:
Mar. 22, 1976
Gerhard Donig, Erlangen, DT;
Manfred Muller, Nurnberg, DT;
Siemens Aktiengesellschaft, Berlin and Munich, DT;
Abstract
A protection arrangement for an inverter having fuses connected in series with its d-c inputs is disclosed. In particular, in one form of the arrangement, an electronic voltage monitoring device is provided for monitoring the input d-c voltage to the inverter at the connection points of the inverter inputs and the fuses. If the voltage monitored by the monitoring device falls below a predetermined level, the monitoring device delivers a protection signal to the control unit of the inverter directing the latter to release firing pulses for extinguishing the valves in the valves branches of the inverter. In another form of the arrangement, the voltage monitoring device monitors the voltage across each of the fuses at the d-c inputs of the inverter, and, if a monitored voltage exceeds a predetermined value, delivers a protection signal to the control unit of the inverter. Additionally, where the inverter being protected is included in a cycloconverter, provision is made for ensuring that a protection signal is not delivered before sufficient time has elapsed for the intermediate d-c link voltage of the converter to reach a predetermined value.