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:
Jun. 02, 2015
Filed:
Mar. 21, 2012
Christian Seel, Kassel, DE;
Lars Bethke, Goettingen, DE;
Christian Seel, Kassel, DE;
Lars Bethke, Goettingen, DE;
SMA Solar Technology AG, Niestetal, DE;
Abstract
During startup of a DC/DC converter having a high-frequency transformer whose primary winding is supplied with current from an input-side DC link via an inverter bridge having pulsed switches and whose secondary winding is used to charge an output-side DC link via a rectifier bridge. The switches of the inverter bridge are operated to load the output-side DC link, in a manner that deviates from a normal operation of the switches in order to limit the currents that flow in the DC/DC converter during startup of the DC/DC converter. Particularly, the switches of the inverter bridge are operated during startup of the DC/DC converter at a pulse width that is fixed during each of a limited number of stages of the startup, and have a duty cycle that is not more than 5 percent during each of the stages of the startup.