公开(公告)号：US20190186480A1

公开(公告)日：2019-06-20

申请号：US15844569

申请日：2017-12-17

Applicant: Microchip Technology Incorporated

Inventor： Prasad Kulkarni ,  Debraj Deb ,  Ramesh Kankanala

IPC: F04B39/00 ,  H02P21/18 ,  F04B35/04

CPC classification number: F04B39/0044 ,  F04B35/04 ,  F04B2203/0202 ,  F04B2203/0209 ,  F04B2207/03 ,  F04C2/00 ,  H02P21/04 ,  H02P21/05 ,  H02P21/06 ,  H02P21/18 ,  H02P21/22

Abstract: Embodiments of the present disclosure include a motor controller with a processor and a machine readable medium. The medium includes instructions that, when loaded and executed by the processor, cause the processor to receive an estimated or sensed speed of a motor, extract a mechanical frequency component from the estimated or sensed speed, transform the mechanical frequency into direct quadrature (DQ) domain at the mechanical frequency, control the mechanical frequency to zero, and generate a dampening signal for torque based upon the controlled mechanical frequency.

公开(公告)号：US11499537B2

公开(公告)日：2022-11-15

申请号：US15844569

申请日：2017-12-17

Applicant: Microchip Technology Incorporated

Inventor： Prasad Kulkarni ,  Debraj Deb ,  Ramesh Kankanala

IPC: F04B39/00 ,  H02P21/04 ,  H02P21/05 ,  H02P21/22 ,  H02P21/06 ,  F04C2/00 ,  H02P21/18 ,  F04B35/04

Abstract: Embodiments of the present disclosure include a motor controller with a processor and a machine readable medium. The medium includes instructions that, when loaded and executed by the processor, cause the processor to receive an estimated or sensed speed of a motor, extract a mechanical frequency component from the estimated or sensed speed, transform the mechanical frequency into direct quadrature (DQ) domain at the mechanical frequency, control the mechanical frequency to zero, and generate a dampening signal for torque based upon the controlled mechanical frequency.

公开(公告)号：US10008967B2

公开(公告)日：2018-06-26

申请号：US15333249

申请日：2016-10-25

Applicant: Microchip Technology Incorporated

Inventor： Prasad Kulkarni ,  Ramesh Kankanala ,  Debraj Deb

IPC: H02P21/00 ,  H02P21/14

CPC classification number: H02P21/141 ,  H02P21/0089

Abstract: A closed loop flux weakening method and apparatus are provided. The closed loop flux weakening apparatus may include a difference circuit that obtains a difference between a q-axis reference voltage and a q-axis voltage, a controller that converts the difference between the q-axis reference voltage and the q-axis voltage into a d-axis current of a stator of the motor, and a summation circuit that obtains a d-axis reference current by adding the d-axis current of the stator of the motor and a feed forward d-axis current of the stator of the motor.

公开(公告)号：US20180115267A1

公开(公告)日：2018-04-26

申请号：US15333249

申请日：2016-10-25

Applicant: Microchip Technology Incorporated

Inventor： Prasad Kulkarni ,  Ramesh Kankanala ,  Debraj Deb

IPC: H02P21/14 ,  H02P21/00

CPC classification number: H02P21/141 ,  H02P21/0089

Abstract: A closed loop flux weakening method and apparatus are provided. The closed loop flux weakening apparatus may include a difference circuit that obtains a difference between a q-axis reference voltage and a q-axis voltage, a controller that converts the difference between the q-axis reference voltage and the q-axis voltage into a d-axis current of a stator of the motor, and a summation circuit that obtains a d-axis reference current by adding the d-axis current of the stator of the motor and a feed forward d-axis current of the stator of the motor.