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:
Mar. 31, 2015
Filed:
Mar. 06, 2013
Applicants:
Wei-hsu Chang, New Taipei, TW;
Jo-yu Wang, New Taipei, TW;
Jen-hung Chi, Taichung, TW;
Inventors:
Assignee:
Richtek Technology Corporation, Chupei, HsinChu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 25/06 (2006.01); H02P 7/29 (2006.01);
U.S. Cl.
CPC ...
H02P 7/29 (2013.01);
Abstract
The present invention provides a motor controller for controlling a DC motor according to a reference signal. The motor controller includes a compensator, a pulse width modulation unit, and a motor driving unit. The compensator generates a control signal according to the reference signal and a sensing signal from the DC motor. The pulse width modulation unit generates a motor control signal by comparing the control signal and a ramp signal having a varying frequency. The motor driving unit receives the motor control signal and drives the DC motor according to the motor control signal.