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. 21, 2020
Filed:
Mar. 15, 2019
Omron Corporation, Kyoto, JP;
Masahito Tanaka, Kyoto, JP;
Yasushi Ono, Kyoto, JP;
OMRON Corporation, Kyoto, JP;
Abstract
Provided is a motor control device having a function of estimating inductance and resistance of a motor for which inductance and resistance thereof are unknown. The motor control device includes a power converter, a current controller which calculates the voltage command input to the power converter using a detection result of a current value of a drive current of the motor, a current command generation unit which specifies a frequency for motor constant calculation on the basis of an electrical time constant of the motor, generates a sine wave of the frequency for motor constant calculation, and inputs the sine wave to the current controller as the current command, and a motor constant calculation unit which obtains a frequency response while the sine wave is input to the current controller as the current command, and calculates resistance and inductance of the motor from the obtained frequency response.