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. 24, 2019
Filed:
Mar. 16, 2017
Applicant:
Rohm Co., Ltd., Kyoto, JP;
Inventor:
Tetsuo Yamato, Kyoto, JP;
Assignee:
Rohm Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 29/024 (2016.01); H02P 29/032 (2016.01); B60L 3/00 (2019.01); H02P 6/16 (2016.01);
U.S. Cl.
CPC ...
H02P 29/024 (2013.01); B60L 3/0061 (2013.01); B60L 3/0076 (2013.01); H02P 6/16 (2013.01); H02P 29/0241 (2016.02); H02P 29/032 (2016.02);
Abstract
A motor driving device includes an abnormality detecting portion arranged to detect an abnormality of one of a plurality of position detection signals based on outputs from a plurality of Hall sensors arranged to detect a rotor position of a brushless DC motor, a measuring portion arranged to measure time between neighboring edges of a normal position detection signal when the abnormality detecting portion detects an abnormality, and a drive control portion arranged to control a drive signal for driving the brushless DC motor based on a latest time measurement result of the measuring portion.