Patents by Inventor Tyler Nils Grendahl

Tyler Nils Grendahl 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).

  • Electric motor rotor discharge protection
    Patent number: 11757320
    Abstract: An electric motor includes a case, a stator having stator windings, a rotor having a rotor shaft, and at least one main rotor bearing coupling the rotor shaft to the case. Common mode charge builds up on the rotor due to imbalances of the stator. The at least one main rotor bearing has a first electrical resistance between the rotor shaft and the case. The electric motor further includes a rotor discharge bearing coupling the rotor shaft to the case. The rotor discharge bearing has a second electrical resistance between the rotor shaft and the case that is less than the first electrical resistance, causing the common mode charge to discharge through the rotor discharge bearing. In a differing embodiment, a rotor discharge brush coupled between the case and the rotor shaft along the longitudinal axis of the rotor shaft discharges the common mode charge.
    Type: Grant
    Filed: August 5, 2021
    Date of Patent: September 12, 2023
    Assignee: Tesla, Inc.
    Inventors: Scott Michael Graves, Diego Alberto Silva Rodriguez, Tyler Nils Grendahl, Alexander Hain
  • ELECTRIC MOTOR ROTOR DISCHARGE PROTECTION
    Publication number: 20210367467
    Abstract: An electric motor includes a case, a stator having stator windings, a rotor having a rotor shaft, and at least one main rotor bearing coupling the rotor shaft to the case. Common mode charge builds up on the rotor due to imbalances of the stator. The at least one main rotor bearing has a first electrical resistance between the rotor shaft and the case. The electric motor further includes a rotor discharge bearing coupling the rotor shaft to the case. The rotor discharge bearing has a second electrical resistance between the rotor shaft and the case that is less than the first electrical resistance, causing the common mode charge to discharge through the rotor discharge bearing. In a differing embodiment, a rotor discharge brush coupled between the case and the rotor shaft along the longitudinal axis of the rotor shaft discharges the common mode charge.
    Type: Application
    Filed: August 5, 2021
    Publication date: November 25, 2021
    Inventors: Scott Michael Graves, Diego Alberto Silva Rodriguez, Tyler Nils Grendahl, Alexander Hain
  • Electric motor rotor discharge protection
    Patent number: 11088582
    Abstract: An electric motor includes a case, a stator having stator windings, a rotor having a rotor shaft, and at least one main rotor bearing coupling the rotor shaft to the case. Common mode charge builds up on the rotor due to imbalances of the stator. The at least one main rotor bearing has a first electrical resistance between the rotor shaft and the case. The electric motor further includes a rotor discharge bearing coupling the rotor shaft to the case. The rotor discharge bearing has a second electrical resistance between the rotor shaft and the case that is less than the first electrical resistance, causing the common mode charge to discharge through the rotor discharge bearing. In a differing embodiment, a rotor discharge brush coupled between the case and the rotor shaft along the longitudinal axis of the rotor shaft discharges the common mode charge.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: August 10, 2021
    Assignee: Tesla, Inc.
    Inventors: Scott Michael Graves, Diego Alberto Silva Rodriguez, Tyler Nils Grendahl, Alexander Hain
  • ELECTRIC MOTOR ROTOR DISCHARGE PROTECTION
    Publication number: 20180083515
    Abstract: An electric motor includes a case, a stator having stator windings, a rotor having a rotor shaft, and at least one main rotor bearing coupling the rotor shaft to the case. Common mode charge builds up on the rotor due to imbalances of the stator. The at least one main rotor bearing has a first electrical resistance between the rotor shaft and the case. The electric motor further includes a rotor discharge bearing coupling the rotor shaft to the case. The rotor discharge bearing has a second electrical resistance between the rotor shaft and the case that is less than the first electrical resistance, causing the common mode charge to discharge through the rotor discharge bearing. In a differing embodiment, a rotor discharge brush coupled between the case and the rotor shaft along the longitudinal axis of the rotor shaft discharges the common mode charge.
    Type: Application
    Filed: November 30, 2017
    Publication date: March 22, 2018
    Applicant: Tesla, Inc.
    Inventors: Scott Michael Graves, Diego Alberto Silva Rodriguez, Tyler Nils Grendahl, Alexander Hain