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. 19, 2019
Filed:
Jun. 02, 2014
Ford Global Technologies, Llc, Dearborn, MI (US);
Craig B. Rogers, Melvindale, MI (US);
FORD GLOBAL TECHNOLOGIES, LLC, Dearborn, MI (US);
Abstract
A method is provided for controlling a traction motor for an electrified vehicle, wherein the motor is driven by a pulse-width modulated inverter. A drive command from a driver of the vehicle is converted into a demanded torque. A substantially fixed DC link voltage is maintained from a DC power source. An input voltage for supplying to the inverter is calculated that causes the motor to deliver the demanded torque at a transition point between a constant-torque region and a field-weakening region of torque production. The voltage from the DC link is converted to the determined input voltage at an input to the inverter. By lowering the voltage applied to the inverter, switching losses and harmonic losses are reduced.