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:
Feb. 02, 2021
Filed:
Dec. 03, 2018
Applicant:
Ford Global Technologies, Llc, Dearborn, MI (US);
Inventors:
Assignee:
Ford Global Technologies, LLC, Dearborn, MI (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P 27/12 (2006.01); H02P 21/18 (2016.01); H02P 21/22 (2016.01);
U.S. Cl.
CPC ...
H02P 27/12 (2013.01); H02P 21/18 (2016.02); H02P 21/22 (2016.02);
Abstract
An electric drive system has a motor including a rotor, an inverter, and a controller. The controller perturbs a position of the rotor via a pulse width modulation (PWM) command to the inverter such that the motor receives an Id current that changes during the perturbing and an Iq current, and responsive to the Iq current settling at zero during the perturbing, alters the PWM command to cause the rotor to rotate.