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:
Nov. 03, 2020
Filed:
Jun. 11, 2018
Applicant:
Rohm Co., Ltd., Kyoto, JP;
Inventor:
Yuki Gohara, Kyoto, JP;
Assignee:
ROHM CO., LTD., Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K 7/14 (2006.01); H02P 23/00 (2016.01); H02P 27/08 (2006.01); H05K 7/20 (2006.01); G06F 1/20 (2006.01); G01P 3/489 (2006.01);
U.S. Cl.
CPC ...
H02P 23/0004 (2013.01); G06F 1/206 (2013.01); H02P 23/0027 (2013.01); H02P 27/085 (2013.01); H05K 7/20136 (2013.01); H05K 7/20209 (2013.01); G01P 3/489 (2013.01);
Abstract
A control circuit includes: a cycle counter configured to measure a cycle of revolutions per minute (RPM) signal indicating an RPM of a motor to be driven to generate a digital measurement value; and a controller configured to generate a control command based on a digital target value corresponding to a target cycle of the RPM signal and the measurement value, wherein the controller switches between a first mode in which the control command is monotonously changed and a second mode in which the control command is generated based on proportional-integral (PI) control.