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:
Aug. 04, 2026
Filed:
Feb. 25, 2021
Kone Corporation, Helsinki, FI;
KONE CORPORATION, Helsinki, FI;
Abstract
A method for identifying parameters, such as a magnetization-axis and torque-axis inductances, of a permanent magnet motor of an elevator includes applying, such as by a brake controller, at least one hoisting machinery brake to prevent rotation of a rotor of the permanent magnet motor, determining, by a first method, a mean value of motor inductance, as well as the magnetization-axis inductance and the torque-axis inductance as relative inductance values based on the mean value, determining, by a second method, being different than the first method, a mean value of motor main inductances, and determining absolute values of the magnetization-axis and the torque axis inductances based on the motor main inductance obtained by the second method and the relative inductance values obtained by the first method.