公开(公告)号：US11387756B1

公开(公告)日：2022-07-12

申请号：US17161780

申请日：2021-01-29

Applicant: Allegro MicroSystems, LLC

Inventor： Kamyar Khosravi ,  Masahira Kurihara ,  Andrew Adib

IPC: H02P21/14 ,  H02P21/10 ,  H02P27/12 ,  H02P21/22 ,  H02P21/13

Abstract: A motor control system for controlling operation of a motor having a plurality of windings includes a gate driver to provide a control signal to one or more switching elements controlling a voltage applied to the plurality of windings and a Field Oriented Control (FOC) controller configured to generate a PWM signal for coupling to the gate driver, wherein the FOC controller comprises a d-axis control loop configured to generate an applied d-axis voltage and a q-axis control loop configured to generate an applied q-axis voltage. A stall detector is configured to calculate an estimate of the q-axis voltage and compare the applied q-axis voltage to a threshold based on the estimate in order to detect a stall condition of the motor.

公开(公告)号：US10819257B1

公开(公告)日：2020-10-27

申请号：US16561334

申请日：2019-09-05

Applicant: Allegro MicroSystems, LLC

Inventor： Kamyar Khosravi ,  Masahira Kurihara ,  Andrew Adib ,  Robert D. Christie

IPC: H02P6/15

Abstract: Systems and methods for computing an average supply current to a motor include a current sensor that is configured to sense a current through the motor. A converter is configured to sample the output of the current sensor at times that are established by a trigger signal and convert the samples into digital current values. A trigger signal generator generates the trigger signal based on one or more pulse width modulated (PWM) motor control signals within a PWM cycle. An average supply current value that indicates the average supply current to the motor is computed by a controller using the digital current values received from the converter.

公开(公告)号：US20220247336A1

公开(公告)日：2022-08-04

申请号：US17161780

申请日：2021-01-29

Applicant: Allegro MicroSystems, LLC

Inventor： Kamyar Khosravi ,  Masahira Kurihara ,  Andrew Adib

IPC: H02P21/14 ,  H02P21/10 ,  H02P21/13 ,  H02P21/22 ,  H02P27/12

Abstract: A motor control system for controlling operation of a motor having a plurality of windings includes a gate driver to provide a control signal to one or more switching elements controlling a voltage applied to the plurality of windings and a Field Oriented Control (FOC) controller configured to generate a PWM signal for coupling to the gate driver, wherein the FOC controller comprises a d-axis control loop configured to generate an applied d-axis voltage and a q-axis control loop configured to generate an applied q-axis voltage. A stall detector is configured to calculate an estimate of the q-axis voltage and compare the applied q-axis voltage to a threshold based on the estimate in order to detect a stall condition of the motor.