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1. (WO2017151230) CONTROL TIMING AND SEQUENCING FOR A MULTI-PHASE ELECTRIC MOTOR

Pub. No.:    WO/2017/151230    International Application No.:    PCT/US2017/013695
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Wed Jan 18 00:59:59 CET 2017
IPC: H02P 6/16
H02P 6/182
Applicants: ALLEGRO MICROSYSTEMS, LLC
Inventors: AMBRUSON, Lyndon
STODDARD, Robert
Title: CONTROL TIMING AND SEQUENCING FOR A MULTI-PHASE ELECTRIC MOTOR
Abstract:
Described embodiments provide an electronic circuit for controlling a motor. The electronic circuit includes a magnetic field sensing circuit responsive to magnetic field sensing elements disposed to sense rotation of the motor. The magnetic field sensing elements generate magnetic field signals, each having a state indicative of at least one of the rotational position and a rotation speed of the motor. A position and speed sensing circuit generates a signal representative of the rotational position of the motor and tracks state changes of the magnetic field signals. A gate driver circuit generates motor drive signals that drive the motor based upon the sensed rotational position. The position and speed sensing circuit generates a qualified control signal based upon a determined valid state change of the magnetic field signals. The gate driver circuit generates the motor drive signals based, at least in part, upon the qualified control signal.