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:
Jul. 19, 2022
Filed:
Nov. 15, 2018
Nissan Motor Co., Ltd., Yokohama, JP;
Shou Oono, Kanagawa, JP;
NISSAN MOTOR CO., LTD., Yokohama, JP;
Abstract
A method for controlling an electric vehicle having a field winding type synchronous motor for providing a driving force, the field winding type synchronous motor that has a rotor having a rotor winding and a stator having a stator winding, by controlling a stator current flowing in the stator winding and a rotor current flowing in the rotor winding is provided. The method includes: setting a basic torque command value based on a vehicle information; calculating a d-axis current command value and a first q-axis current command value for the stator current, and a f-axis current command value for the rotor current, based on the basic torque command value and the vehicle information; calculating a magnetic flux estimate value, which is an estimated value of a magnetic flux generated in the rotor, based on the d-axis current command value and the f-axis current command value; calculating a final torque command value, based on the first q-axis current command value and the magnetic flux estimate value; calculating a second q-axis current command value, based on the magnetic flux estimate value and the final torque command value. The method includes further includes controlling the stator current and the rotor current, based on the second q-axis current command value, the d-axis current command value and the f-axis current command value.