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. 28, 2017
Filed:
Jun. 02, 2016
Applicant:
Riso Kagaku Corporation, Tokyo, JP;
Inventor:
Masao Suzuki, Ibaraki, JP;
Assignee:
RISO KAGAKU CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 1/46 (2006.01); H02P 27/08 (2006.01); H02P 3/22 (2006.01); H02P 3/12 (2006.01); H02P 7/29 (2016.01); H02P 7/03 (2016.01);
U.S. Cl.
CPC ...
H02P 27/08 (2013.01); H02P 3/12 (2013.01); H02P 3/22 (2013.01); H02P 7/04 (2016.02); H02P 7/29 (2013.01);
Abstract
A drive control device includes: a driver including a circuit and configured to drive a motor; and a controller configured to control the driver. The controller is configured to: in a period other than a stop period during driving of the motor, control the driver by a PWM control of a synchronous rectification type, the stop period lasting for a specified time or longer during the driving of the motor; and in the stop period during the driving of the motor, suspend the PWM control of the synchronous rectification type and control the driver such that the motor is set to a short-circuit brake state or a disconnected state.