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:
Jan. 23, 2018
Filed:
Jun. 11, 2014
Applicant:
Sanyo Denki Co., Ltd., Tokyo, JP;
Inventors:
Assignee:
Sanyo Denki Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04D 27/00 (2006.01); H02P 6/15 (2016.01);
U.S. Cl.
CPC ...
F04D 27/001 (2013.01); F04D 27/008 (2013.01); H02P 6/15 (2016.02);
Abstract
A fan motor control unit includes sensor units that each detect a rotational position of the fan motor, a switching unit that selectively connects each of stator coils of the fan motor to a rectifier circuit, a current sensor that detects a current flowing in the fan motor, and a switching control unit that advances, in the case where the current detected by the current sensor exceeds a threshold, a energization timing from the rectifier circuit to the stator coils with respect to the energization timing applied while the current detected by the current sensor is lower than the threshold, on the basis of the rotational position detected by the sensor units.