公开(公告)号：US20200132009A1

公开(公告)日：2020-04-30

申请号：US16172963

申请日：2018-10-29

Applicant: Caterpillar Inc.

Inventor： Sean C. Landers ,  Sangameshwar Sonth

IPC: F02D41/22 ,  F02D41/24 ,  F02D41/30 ,  G01M15/04 ,  B60L15/20 ,  B60W30/188 ,  B60W10/188 ,  B60W20/40

Abstract: A method for testing power of an electric drive system includes setting the electric motor of the electric drive system to a desired speed and applying a brake load to the system. The method also includes increasing the brake load until an engine of the electric drive system is fully loaded. After the engine is fully loaded, the method includes maintaining the brake load until the acceleration remains between the upper predetermined threshold and the lower predetermined threshold for the predetermined period of time, which indicates that the engine has stabilized at full power. Once the engine is at full power, the commanded power of the electric drive system required for stabilizing the engine at full power is averaged, and the average power is compared to a predetermined pass/fail threshold to determine if the electric drive system has sufficient power.

公开(公告)号：US09899946B2

公开(公告)日：2018-02-20

申请号：US15040795

申请日：2016-02-10

Applicant: Caterpillar Inc.

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

IPC: H02P25/08 ,  H02P25/089 ,  H02P23/14

CPC classification number: H02P25/089 ,  H02P21/141 ,  H02P21/18 ,  H02P21/24 ,  H02P23/14

Abstract: A control system for a switched reluctance (SR) machine having a rotor and a stator is provided. The control system may include a converter circuit in electrical communication between the stator and a common bus, and a controller configured to monitor a bus voltage of the converter circuit and a phase current of the SR machine. The controller may be configured to determine a phase voltage based on one or more of main pulses and any diagnostic pulses, determine an estimated flux based on the phase voltage and an associated mutual voltage, determine a rotor position based at least partially on the estimated flux, and control the SR machine based on the rotor position and a desired torque.

公开(公告)号：US11868114B2

公开(公告)日：2024-01-09

申请号：US18059766

申请日：2022-11-29

Applicant: Caterpillar Inc.

Inventor： Robert Jason McGee ,  Craig L. Koehrsen ,  Paul D Lenzen ,  Clarence Matthew Glover ,  Kyle Hendricks ,  Joshua Struble ,  Justin Peters ,  Sangameshwar Sonth

IPC: G05B19/4155 ,  H04L67/12

CPC classification number: G05B19/4155 ,  H04L67/12 ,  G05B2219/31384

Abstract: A controller may configure the machine to operate in a plurality of modes including a manned control mode, a remote control mode, and an autonomous control mode. The controller may receive a request to cause the machine to perform an action; and determine a requested mode of operation of the machine associated with the request. The requested mode of operation may be one of the plurality of modes. The controller may selectively deny the request or enable the machine to perform the action based on a priority assigned to a current mode of operation of the machine and a priority assigned to the requested mode of operation.

公开(公告)号：US20170351230A1

公开(公告)日：2017-12-07

申请号：US15172224

申请日：2016-06-03

Applicant: Caterpillar Inc.

Inventor： Brian D. Kuras ,  Michael J. Barngrover ,  Sangameshwar Sonth

IPC: G05B15/02 ,  H03K3/037

CPC classification number: H03K3/0377

Abstract: A control system for a machine having at least one control element is disclosed. The control system includes multiple input sensors in communication with the control element. The input sensor generates an input signal based on an input to the control element. The control system includes multiple actuating members to control operations of the machine. The control system includes a controller in communication with the input sensors and the actuating members. The controller receives the input signal from the input sensor and determines an imposed hysteresis level corresponding to the input signal based on a hysteresis input function. The controller is further configured to generate a hysteresis conditioned input signal based on the imposed hysteresis level.

公开(公告)号：US10808641B2

公开(公告)日：2020-10-20

申请号：US16172963

申请日：2018-10-29

Applicant: Caterpillar Inc.

Inventor： Sean C. Landers ,  Sangameshwar Sonth

IPC: G01M15/04 ,  F02D41/22 ,  F02D41/24 ,  F02D41/30 ,  B60L15/20 ,  B60W30/188 ,  B60W20/40 ,  B60W10/188

Abstract: A method for testing power of an electric drive system includes setting the electric motor of the electric drive system to a desired speed and applying a brake load to the system. The method also includes increasing the brake load until an engine of the electric drive system is fully loaded. After the engine is fully loaded, the method includes maintaining the brake load until the acceleration remains between the upper predetermined threshold and the lower predetermined threshold for the predetermined period of time, which indicates that the engine has stabilized at full power. Once the engine is at full power, the commanded power of the electric drive system required for stabilizing the engine at full power is averaged, and the average power is compared to a predetermined pass/fail threshold to determine if the electric drive system has sufficient power.

公开(公告)号：US10404239B2

公开(公告)日：2019-09-03

申请号：US15172224

申请日：2016-06-03

Applicant: Caterpillar Inc.

Inventor： Brian D. Kuras ,  Michael J. Barngrover ,  Sangameshwar Sonth

IPC: H03K3/037

Abstract: A control system for a machine having at least one control element is disclosed. The control system includes multiple input sensors in communication with the control element. The input sensor generates an input signal based on an input to the control element. The control system includes multiple actuating members to control operations of the machine. The control system includes a controller in communication with the input sensors and the actuating members. The controller receives the input signal from the input sensor and determines an imposed hysteresis level corresponding to the input signal based on a hysteresis input function. The controller is further configured to generate a hysteresis conditioned input signal based on the imposed hysteresis level.

公开(公告)号：US20170229992A1

公开(公告)日：2017-08-10

申请号：US15040795

申请日：2016-02-10

Applicant: Caterpillar Inc.

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

IPC: H02P25/089 ,  H02P23/14

CPC classification number: H02P25/089 ,  H02P21/141 ,  H02P21/18 ,  H02P21/24 ,  H02P23/14

Abstract: A control system for a switched reluctance (SR) machine having a rotor and a stator is provided. The control system may include a converter circuit in electrical communication between the stator and a common bus, and a controller configured to monitor a bus voltage of the converter circuit and a phase current of the SR machine. The controller may be configured to determine a phase voltage based on one or more of main pulses and any diagnostic pulses, determine an estimated flux based on the phase voltage and an associated mutual voltage, determine a rotor position based at least partially on the estimated flux, and control the SR machine based on the rotor position and a desired torque.

公开(公告)号：US11513498B2

公开(公告)日：2022-11-29

申请号：US16947480

申请日：2020-08-03

Applicant: Caterpillar Inc.

Inventor： Robert Jason McGee ,  Craig L. Koehrsen ,  Paul D. Lenzen ,  Clarence Matthew Glover ,  Kyle Hendricks ,  Joshua Struble ,  Justin Peters ,  Sangameshwar Sonth

IPC: G05B19/4155 ,  H04L67/12

Abstract: A controller may configure the machine to operate in a plurality of modes including a manned control mode, a remote control mode, and an autonomous control mode. The controller may receive a request to cause the machine to perform an action; and determine a requested mode of operation of the machine associated with the request. The requested mode of operation may be one of the plurality of modes. The controller may selectively deny the request or enable the machine to perform the action based on a priority assigned to a current mode of operation of the machine and a priority assigned to the requested mode of operation.

公开(公告)号：US10464565B2

公开(公告)日：2019-11-05

申请号：US15837535

申请日：2017-12-11

Applicant: CATERPILLAR INC.

Inventor： Brian Dean Kuras ,  Sean Cameron Landers ,  Sangameshwar Sonth ,  Ankit Sharma

IPC: B60W30/18 ,  B60W30/188 ,  B60W10/06 ,  E02F9/22 ,  F16H47/04 ,  F16H61/06 ,  F16H61/662 ,  F16H37/08

Abstract: A propulsion control system provides different levels of jerk as a function of operator inputs and actual measured operational parameters in a machine. The system includes a power source, a continuously variable transmission (CVT) coupled to an output of the power source, a plurality of input/output devices, a plurality of sensors configured to generate signals indicative of operational parameters of the machine, and a controller communicatively coupled with the power source, the CVT, the input/output devices, and the sensors. The controller includes a database stored in a memory with a plurality of jerk values mapped to different operations of the machine selected from at least one of activation of a brake by an operator for an aggressive stop, a directional shift request from an operator to select one of forward, reverse, or neutral, and a set of operating conditions of the machine indicative of a blade load shedding mode. A jerk selection module is programmed to select at least one of a jerk value, an acceleration limit value, and a deceleration limit value based on a current operation of the machine. A speed command generating device is programmed to integrate a selected jerk value twice to generate a desired speed command. A proportional-integral-derivative (PID) control device is configured to continuously calculate a control error between the desired speed command and an actual speed of the machine. An output command control module is configured to output a control command for implementing a change in an output torque to at least one of the power source and the CVT to reduce the control error.

公开(公告)号：US10079566B1

公开(公告)日：2018-09-18

申请号：US15649778

申请日：2017-07-14

Applicant: Caterpillar Inc.

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

IPC: H02P6/00 ,  H02P25/08 ,  H02P6/18

CPC classification number: H02P25/08 ,  H02P6/18 ,  H02P6/183

Abstract: A system and method for estimating a position and a speed of a rotor of a Switched Reluctance (SR) machine is provided. The SR machine comprises the rotor, a stator and at least one winding. The method includes generating a diagnostic pulse having a trapezoidal shape. The method further includes injecting a diagnostic pulse into the at least one winding of the SR machine. The method further includes measuring an actual stator current flowing through the at least one winding of the SR machine. The method further includes computing an estimated stator current flowing through the at least one winding using observer-based estimation technique. The estimated stator current is compared with the actual stator current to compute an error signal. At least one of the position and the speed of the rotor is estimated based on the error signal.