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:
Apr. 07, 2020
Filed:
Aug. 22, 2018
Sma Solar Technology Ag, Niestetal, DE;
Karl Nesemann, Kaufungen, DE;
Andreas Falk, Kassel, DE;
SMA Solar Technology AG, Niestetal, DE;
Abstract
A circuit for limiting the voltage of a photovoltaic string divided into a first section and a second section of a series circuit of solar modules, includes a first terminal for connection to a first end of the first section, a second terminal for connection to a first end of the second section and a third terminal for connection to a second end of the second section. The circuit also includes a bypass switch, which is connected at one end to the first terminal and at the other end to the third terminal and a disconnect switch, which is connected at one end to the first terminal and at the other end to the second terminal. The circuit has a controller for actuating the bypass switch and the disconnect switch, wherein the controller is configured to determine a first threshold value Uand a second, lower threshold value Udepending on a switch voltage Udropped across the disconnect switch in an open state and taking into account the number of solar modules in the first section and in the second section.