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:
Dec. 27, 2022
Filed:
Sep. 09, 2021
Minebea Mitsumi Inc., Nagano, JP;
Hiroyuki Kaidu, Kakegawa, JP;
Masato Aoki, Iwata, JP;
Takahiro Suzuki, Fukuroi, JP;
Tomotaka Sakuma, Nagano, JP;
Yoshihisa Okabuchi, Sapporo, JP;
MINEBEA MITSUMI Inc., Nagano, JP;
Abstract
The degree of flexibility of a speed curve for a target rotational speed of a motor is to be increased. A motor control circuitmeasures a duty cycle of an input speed command signal Sc indicating a target rotational speed of a motorto be driven, sets an inflection point In for each duty cycle obtained by equally dividing a possible duty cycle range assumed by the speed command signal Sc based on resolution informationindicating a resolution of the duty cycle of the speed command signal Sc, calculates a rotational speed corresponding to the measured duty cycle of the speed command signal Sc based on rotational speed informationindicating rotational speeds at the inflection points In on a speed curve and the set inflection points In, and determines the calculated rotational speed as the target rotational speed.