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:
May. 31, 2016
Filed:
Jul. 26, 2013
Applicant:
Semiconductor Components Industries, Llc, Phoenix, AZ (US);
Inventors:
Kosaku Hioki, Gifu, JP;
Kazumasa Takai, Kagamigahara, JP;
Takeshi Naganuma, Inazawa, JP;
Yoshihiro Niwa, Hashima-gun, JP;
Assignee:
SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Phoenix, AZ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05B 19/40 (2006.01); H02P 6/18 (2016.01); H02P 8/12 (2006.01); H02P 8/16 (2006.01); H02P 8/04 (2006.01);
U.S. Cl.
CPC ...
H02P 6/182 (2013.01); G05B 19/40 (2013.01); H02P 6/188 (2013.01); H02P 8/12 (2013.01); H02P 8/16 (2013.01); H02P 6/18 (2013.01); H02P 8/04 (2013.01);
Abstract
An amount of a motor drive current is controlled to an appropriate value. Two coils are provided, and a rotor is rotated by the coils by setting different phases for the supplied currents to the two coils. During a phase where one of the coils is in a high-impedance state, an induced voltage generated in the coil is detected. According to the state of the induced voltage, an output control circuit controls the amounts of the motor drive currents supplied to the two coils.