公开(公告)号：US20220231626A1

公开(公告)日：2022-07-21

申请号：US17154832

申请日：2021-01-21

Applicant: Caterpillar Inc.

Inventor： Jesse Ray Gerdes ,  James Michael Thorne ,  Ahmed Khalil ,  Jackson Wai ,  Sajan Abdul ,  Amara Ashfaq

IPC: H02P25/089 ,  E02F9/20

Abstract: Power based self-sensing of a rotor position of an SR motor at mid to high speeds and low torque is achieved by an SR motor control system by comparing the motor power to an injection maximum power. A position current pulse is injected to a stator pole in response to the motor power being less than the injection maximum power. An actual stator current created by the position current pulse is compared to an estimated stator current, and a stored estimated rotor position in a memory is updated to a new estimated rotor position if the actual stator current is not equal to the estimated stator current.

公开(公告)号：US10193475B2

公开(公告)日：2019-01-29

申请号：US15317487

申请日：2015-05-18

Applicant: Caterpillar Inc.

Inventor： Seok-hee Han ,  Carlos Nino Baron ,  Jackson Wai ,  Ahmed Khalil ,  Ernesto Inoa ,  Jesse Gerdes ,  James Michael Thorne

IPC: H02P25/08 ,  H02P6/18 ,  H02P6/185 ,  H02P25/089 ,  H02P27/06

Abstract: A method for determining rotor position of a switched reluctance (SR) machine having a rotor and a stator is provided. The method may include injecting a test pulse into one or more idle phases of the SR machine, determining a decoupled flux value based at least partially on a total flux value corresponding to the test pulse and a mutual flux value, and determining the rotor position based at least partially on the decoupled flux value.

公开(公告)号：US09800192B1

公开(公告)日：2017-10-24

申请号：US15093477

申请日：2016-04-07

Applicant: Caterpillar Inc.

Inventor： Seok-hee Han ,  Jackson Wai ,  Ahmed Khalil ,  Jesse Gerdes ,  James Michael Thorne ,  Sangameshwar Sonth

IPC: H02P25/08 ,  H02P25/092 ,  H02P23/14

CPC classification number: H02P25/092 ,  H02P23/14 ,  H02P25/089

Abstract: A control system for a multi-phase switched reluctance (SR) machine, having at least two phases, is disclosed. The control system may include a converter circuit and a controller. The controller may include a phase voltage estimator module configured to determine a first phase voltage and a second phase voltage associated with a second phase second phase for the SR machine. The controller may further include a flux estimator module configured to determine first and second estimated fluxes, the first estimated flux associated with the first phase and based on the first phase voltage and an associated first mutual voltage and the second estimated flux the second estimated flux associated with the second phase and based on the second phase voltage and an associated second mutual voltage, and a position observer module configured to determine a rotor position based at least partially on the first estimated flux, the second mutual flux.

公开(公告)号：US20170294858A1

公开(公告)日：2017-10-12

申请号：US15093477

申请日：2016-04-07

Applicant: Caterpillar Inc.

Inventor： Seok-hee Han ,  Jackson Wai ,  Ahmed Khalil ,  Jesse Gerdes ,  James Michael Thorne ,  Sangameshwar Sonth

IPC: H02P25/092 ,  H02P23/14

CPC classification number: H02P25/092 ,  H02P23/14 ,  H02P25/089

Abstract: A control system for a multi-phase switched reluctance (SR) machine, having at least two phases, is disclosed. The control system may include a converter circuit and a controller. The controller may include a phase voltage estimator module configured to determine a first phase voltage and a second phase voltage associated with a second phase second phase for the SR machine. The controller may further include a flux estimator module configured to determine first and second estimated fluxes, the first estimated flux associated with the first phase and based on the first phase voltage and an associated first mutual voltage and the second estimated flux the second estimated flux associated with the second phase and based on the second phase voltage and an associated second mutual voltage, and a position observer module configured to determine a rotor position based at least partially on the first estimated flux, the second mutual flux.