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:
Dec. 22, 2020
Filed:
Dec. 09, 2016
Applicant:
Allegro Microsystems, Llc, Manchester, NH (US);
Inventors:
Yisong Lu, Shrewsbury, MA (US);
Lyndon Ambruson, Warren, MA (US);
Assignee:
Allegro MicroSystems, LLC, Manchester, NH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 6/16 (2016.01); H02P 6/22 (2006.01);
U.S. Cl.
CPC ...
H02P 6/16 (2013.01); H02P 6/22 (2013.01);
Abstract
Methods and apparatus for controlling a three-phase motor and providing sinusoidal phase currents during startup. In embodiments, differential outputs from a magnetic field sensing element are used to generate a polarity signal used to provide a motor direction drive signal. An amplitude signal derived from the magnetic field sensing element and a measured motor current are used to generate a current amplitude signal. A PWM module generates signals for driving the motor with sinusoidal phase currents from the current amplitude signal and the motor direction drive signal.