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:
Mar. 31, 2020
Filed:
Feb. 22, 2019
Determination of demagnetized torque capability in real-time for electric motor in propulsion system
GM Global Technology Operations Llc, Detroit, MI (US);
Dwarakanath V. Simili, Oakland Township, MI (US);
Siddharth Ballal, Shelby Township, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A propulsion system for a device having an electric motor configured to selectively provide a first torque contribution to propel the device. At least one sensor is configured to obtain a respective signal related to the electric motor. A controller is in communication with the sensors and configured to determine a magnet flux linkage (λ) based in part on the respective signal. The controller has a processor and tangible, non-transitory memory on which instructions are recorded for a method of determining a demagnetized torque capability (T) for the electric motor in real-time. In the event of a threshold level of demagnetization of the electric motor, the method estimates the torque capability in real time of the electric motor, taking the demagnetization level into account. At least one operating parameter of the device is controlled based at least partially on the demagnetized torque capability (T).