Patents by Inventor Ralf Andrae

Ralf Andrae has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Inverter with monitoring of the moisture state and method for operating an inverter
    Patent number: 9351342
    Abstract: An inverter for converting electrical power from a DC voltage generator is disclosed. The inverter includes a moisture sensor inside a housing of the inverter, and a control unit for controlling the inverter connected to the moisture sensor for receiving a moisture value from the moisture sensor. The inverter also includes a heating element connected to the control unit. The control unit is configured to control the inverter based on the moisture value such that, in the case where a limit value for the moisture is exceeded, the voltage at an input of the converter unit lies below an arc-avoiding voltage value and electrical power is fed to the heating element. Furthermore, a method for operating an inverter of this type is disclosed.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: May 24, 2016
    Assignee: SMA SOLAR TECHNOLOGY AG
    Inventor: Ralf Andrae
  • INVERTER WITH MONITORING OF THE MOISTURE STATE AND METHOD FOR OPERATING AN INVERTER
    Publication number: 20140166635
    Abstract: An inverter for converting electrical power from a DC voltage generator is disclosed. The inverter includes a moisture sensor inside a housing of the inverter, and a control unit for controlling the inverter connected to the moisture sensor for receiving a moisture value from the moisture sensor. The inverter also includes a heating element connected to the control unit. The control unit is configured to control the inverter based on the moisture value such that, in the case where a limit value for the moisture is exceeded, the voltage at an input of the converter unit lies below an arc-avoiding voltage value and electrical power is fed to the heating element. Furthermore, a method for operating an inverter of this type is disclosed.
    Type: Application
    Filed: December 16, 2013
    Publication date: June 19, 2014
    Applicant: SMA Solar Technology AG
    Inventor: Ralf Andrae
  • Inverter comprising a casing
    Patent number: 7817406
    Abstract: The invention is directed to an inverter including a casing (1) with at least two chambers (2, 3), the one chamber (3) comprising the display (11) of a communication unit, said display (11) being pivotally disposed in the chamber (3).
    Type: Grant
    Filed: May 7, 2008
    Date of Patent: October 19, 2010
    Assignee: SMA Solar Technologie AG
    Inventors: Sven Bremicker, Andreas Donth, Ralf Andrae, Johannes Häde, Yasar Nafiz, Matthias Victor
  • Inverter comprising a casing
    Publication number: 20080304220
    Abstract: The invention is directed to an inverter including a casing (1) with at least two chambers (2, 3), the one chamber (3) comprising the display (11) of a communication unit, said display (11) being pivotally disposed in the chamber (3).
    Type: Application
    Filed: May 7, 2008
    Publication date: December 11, 2008
    Applicant: SMA Technologie AG
    Inventors: Sven Bremicker, Andreas Donth, Ralf Andrae, Johannes Hade, Yasar Nafiz, Matthias Victor