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. 17, 2017
Filed:
Apr. 08, 2016
Marvell International Ltd., Hamilton, BM;
Yichao Wang, Singapore, SG;
MARVELL INTERNATIONAL LTD., Hamilton, BM;
Abstract
A method includes measuring a speed of a motor, determining a phase angle of a motor voltage relative to a motor current based on the measured speed of the motor, adjusting a profile of the motor voltage by the determined phase angle, and generating a profile of a drive voltage based on the adjusted profile of the motor voltage and a back-EMF profile. An apparatus includes a motor, and a driver circuit. The driver circuit measures a speed of the motor, determines a phase angle of a motor voltage relative to a motor current based on the measured speed of the motor, adjusts a profile of the motor voltage by the determined phase angle, and generates a profile of a drive voltage based on the adjusted profile of the motor voltage and a back-EMF profile.