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. 28, 2010
Filed:
Jul. 17, 2007
Christian Angerer, Sierning, AT;
Hannes Heigl, Prambachkirchen, AT;
Harald Kreuzer, Linz/Donau, AT;
Fronius International GmbH, Pettenbach, AT;
Abstract
The invention relates to a method for controlling the voltage and power of several HF inverters (), connected in parallel at the output, of an electrically isolated inverter assembly as well as for distributing the load to these HF inverters () each consisting of at least one DC-DC converter (), one intermediate circuit () and one DC-AC converter (), with a command variable (U') being formed for each HF inverter () so as to preset a nominal value for control of an intermediate-circuit voltage (U) at the intermediate circuit () of the HF inverter (). The load of each HF inverter () is determined by a control unit () by measuring the current or power required, an internal resistance of the HF inverter () is simulated via which internal resistance a virtual voltage drop (U) is caused which depends on the load determined and is used for controlling the voltage (U) of the intermediate circuit () so as to produce a purposive change in the output voltage of each HF inverter ().