Patents by Inventor Christopher REEK

Christopher REEK 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).

  • Method and apparatus for operating a dual rotor electrical machine
    Patent number: 11670995
    Abstract: There is provided a system including a dual rotor electrical machine. The dual rotor electrical machine comprises a stator, an inner rotor including a first number of permanent magnet pole pairs, and a modulator including a second number of modulating segments. The system includes a controller configured to execute non-transitory machine readable instructions that, when executed by the controller, cause the system to determine a virtual position of an electromagnetic field of the stator based on a weighted sum of an angular position of the inner rotor and an angular position of the modulator, wherein weights in the weighted sum are based on the first number and the second number.
    Type: Grant
    Filed: August 25, 2020
    Date of Patent: June 6, 2023
    Assignee: Deere & Company
    Inventors: Matthias Lang, Chris J. Tremel, Christopher Reek
  • METHOD AND APPARATUS FOR OPERATING A DUAL ROTOR ELECTRICAL MACHINE
    Publication number: 20210242761
    Abstract: There is provided a system including a dual rotor electrical machine. The dual rotor electrical machine comprises a stator, an inner rotor including a first number of permanent magnet pole pairs, and a modulator including a second number of modulating segments. The system includes a controller configured to execute non-transitory machine readable instructions that, when executed by the controller, cause the system to determine a virtual position of an electromagnetic field of the stator based on a weighted sum of an angular position of the inner rotor and an angular position of the modulator, wherein weights in the weighted sum are based on the first number and the second number.
    Type: Application
    Filed: August 25, 2020
    Publication date: August 5, 2021
    Applicant: Deere & Company
    Inventors: Matthias LANG, Chris J. TREMEL, Christopher REEK