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:
Oct. 24, 2017
Filed:
Feb. 09, 2015
Applicant:
Nidec Servo Corporation, Kiryu-shi, Gumma, JP;
Inventor:
Masatomo Ishikawa, Kiryu, JP;
Assignee:
Nidec Servo Corporation, Gumma, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P 21/00 (2016.01); F04D 27/00 (2006.01); H02P 21/26 (2016.01); H02P 21/18 (2016.01);
U.S. Cl.
CPC ...
F04D 27/004 (2013.01); H02P 21/18 (2016.02); H02P 21/26 (2016.02);
Abstract
A motor device configured to convey a fluid by driving a fan with a motor includes a position/speed acquirer configured to acquire a current rotation angle and a current rotation speed of the motor, a multiplier configured to calculate a flow-rate-constant target driving current by multiplying the rotation speed and a flow rate coefficient, and a current controller configured or programmed to control a motor driving current by setting, as a control target, the flow-rate-constant target driving current and to control a flow rate of the fluid to be maintained at a constant value which depends on the flow rate coefficient.