Patents by Inventor Karsten Ahnert

Karsten Ahnert 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).

  • Patent number: 10873279
    Abstract: The invention relates to a motor starter (10) for an electric motor (20), wherein the motor starter (10) comprises a first and a second phase (12, 14). Said motor starter and electric motor each have an associated switching apparatus (29, 31) which each have an electromechanical switch (22, 24) and a semiconductor switch (23, 25) connected to form a bypass circuit. The electromechanical switches (22, 24) and the semiconductor switches (23, 25) are designed to be separately operable by a control unit (40), and the first and the second phase (12, 14) are connected to a passive overcurrent protection means (30). The passive overcurrent protection means (30) has a fuse (32, 34, 36) for each phase. According to the invention, a measuring apparatus (42, 44) is arranged in at least one of the phases (12, 14) along the phase direction directly between the passive overcurrent protection means (30) and at least one of the switching apparatuses (29, 31).
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: December 22, 2020
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Karsten Ahnert, Gernot-Dirk Almen, Norbert Fiedler, Bernd Flor, Franz Nagy, Nico Wohlrab, Albrecht Wolf
  • Publication number: 20190115855
    Abstract: The invention relates to a motor starter (10) for an electric motor (20), wherein the motor starter (10) comprises a first and a second phase (12, 14). Said motor starter and electric motor each have an associated switching apparatus (29, 31) which each have an electromechanical switch (22, 24) and a semiconductor switch (23, 25) connected to form a bypass circuit. The electromechanical switches (22, 24) and the semiconductor switches (23, 25) are designed to be separately operable by a control unit (40), and the first and the second phase (12, 14) are connected to a passive overcurrent protection means (30). The passive overcurrent protection means (30) has a fuse (32, 34, 36) for each phase. According to the invention, a measuring apparatus (42, 44) is arranged in at least one of the phases (12, 14) along the phase direction directly between the passive overcurrent protection means (30) and at least one of the switching apparatuses (29, 31).
    Type: Application
    Filed: February 3, 2017
    Publication date: April 18, 2019
    Inventors: Karsten Ahnert, Gernot-Dirk Almen, Norbert Fiedler, Bernd Flor, Franz Nagy, Nico Wohlrab, Albrecht Wolf
  • Patent number: 8933577
    Abstract: A pitch system of a wind energy system includes an emergency energy store for moving a rotor blade into a safety position in the event of the failure of an external energy supply. The emergency energy store can be tested, for example to assess aging, by supplying electrical energy to an actuating device configured to set a pitch angle of a rotor blade even in a normal operating mode of the wind energy system temporarily exclusively from the emergency energy store. This configuration ensures reliable operation of a wind energy system.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: January 13, 2015
    Assignee: Siemens Aktiengesellschaft
    Inventors: Karsten Ahnert, Thomas Demuth, Steffen Hellmich, Markus Mauersberger, Andres Männer