公开(公告)号：US10897217B2

公开(公告)日：2021-01-19

申请号：US16107623

申请日：2018-08-21

申请人： Caterpillar Inc.

发明人： Ahmed Khalil ,  Sam Han ,  James Thorne ,  Jesse Gerdes ,  Jackson Wai ,  Carlos Nino Baron ,  Sajan Abdul

IPC分类号： H02P6/182 ,  H02P25/089 ,  H02P25/092

摘要： A device may receive a current measurement of a motor identifying a plurality of component currents associated with a plurality of phases. The device may determine a position estimate for the motor based on the plurality of component currents associated with the plurality of phases. The device may control the motor based on the plurality of component currents.

公开(公告)号：US09899946B2

公开(公告)日：2018-02-20

申请号：US15040795

申请日：2016-02-10

申请人： Caterpillar Inc.

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

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

CPC分类号： H02P25/089 ,  H02P21/141 ,  H02P21/18 ,  H02P21/24 ,  H02P23/14

摘要： 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：US09647595B2

公开(公告)日：2017-05-09

申请号：US14266110

申请日：2014-04-30

申请人： Caterpillar Inc

发明人： Jackson Wai ,  Carlos Nino Baron ,  Jesse Gerdes ,  Ernesto Inoa ,  Ahmed Khalil

IPC分类号： H02K29/06 ,  H02P6/10 ,  H02P25/098 ,  B62D5/04 ,  H02P6/14 ,  H02K29/08

CPC分类号： H02P25/098 ,  B62D5/046 ,  H02K29/08 ,  H02P6/10 ,  H02P6/14 ,  Y02T10/7258

摘要： A method of controlling an electric motor may include determining a desired torque at the electric motor. A current at a first phase of the electric motor may be calculated at a controller. The calculated current may be a current that results in supplying the desired torque at the electric motor. The controller may compare the calculated current to a predetermined threshold current, and when the calculated current is greater than the predetermined threshold current, the controller may reduce the calculated current to the predetermined threshold current and adjust a current in a second phase adjacent to the first phase of the electric motor to continue to supply the desired torque at the electric motor.

公开(公告)号：US20160248362A1

公开(公告)日：2016-08-25

申请号：US14626635

申请日：2015-02-19

申请人： CATERPILLAR INC.

发明人： Carlos Nino Baron ,  Ernesto Inoa ,  Jackson Wai ,  Jesse Gerdes ,  Ahmed Khalil

IPC分类号： H02P25/08

CPC分类号： H02P25/08 ,  H02P25/089

摘要： A method of regulating a phase current of an electric motor is provided. The method may include selectively enabling one or more switches of each phase of the electric motor according to one of at least a soft chopping motoring routine and a soft chopping generating routine, monitoring the phase current relative to a first hysteresis band, controlling the switches according to the soft chopping motoring routine when the phase current exceeds the first hysteresis band while operating according to the soft chopping generating routine, and controlling the switches according to the soft chopping generating routine when the phase current exceeds the first hysteresis band while operating according to the soft chopping motoring routine.

摘要翻译： 提供一种调节电动机的相电流的方法。 该方法可以包括根据至少软斩波电动程序和软斩波产生程序中的至少一个选择性地启用电动机的每个相的一个或多个开关，监测相对于第一滞后带的相电流，根据 根据软斩波产生程序在相电流超过第一滞后频带的同时，根据软斩波产生程序在相电流超过第一滞后频带时控制开关，同时根据 软斩动作程序。

公开(公告)号：US11545922B2

公开(公告)日：2023-01-03

申请号：US17154832

申请日：2021-01-21

申请人： Caterpillar Inc.

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

IPC分类号： H02K21/00 ,  H02P25/089 ,  E02F9/20 ,  E02F3/76 ,  E02F3/84

摘要： 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：US20220200501A1

公开(公告)日：2022-06-23

申请号：US17132076

申请日：2020-12-23

申请人： Caterpillar Inc.

发明人： Jesse R. Gerdes ,  Thomas M. Sopko ,  Carlos E. Nino Baron ,  Jackson Wai ,  Ahmed Khalil ,  Sajan Abdul ,  Amara Ashfaq ,  James Michael Thorne

IPC分类号： H02P23/30 ,  E02F9/20

摘要： A work machine includes a frame, a traction system supporting the frame, a power source mounted on the frame, a switched reluctance motor, an inverter configured to control power to the motor from a power source, and a controller. The controller is configured to receive a signal indicating a desired torque and determine if the desired torque is between an upper threshold and a lower threshold. If the desired torque is between the upper threshold and the lower threshold, pulse width modulation is used to produce a PWM adjusted torque command, and the motor is commanded based on the PWM adjusted torque command. The PWM adjusted torque command is configured to cycle between the upper threshold and the lower threshold to produce the desired torque.

公开(公告)号：US10938332B1

公开(公告)日：2021-03-02

申请号：US16594797

申请日：2019-10-07

申请人： Caterpillar Inc.

发明人： Ahmed Khalil ,  James Thorne ,  Jackson Wai ,  Amara Ashfaq ,  Jesse Gerdes

IPC分类号： H02P25/08 ,  H02P25/092 ,  H02P23/14 ,  H02P25/089 ,  H02P9/00

摘要： A control system that includes a converter circuit and a control device is disclosed. The converter circuit may be configured to control a phase current of a switched reluctance machine. The control device may be configured to determine an estimated flux based on a bus voltage, a phase voltage, and a mutual voltage. The control device may be configured to determine a flux threshold based on the phase current, and determine a first limit and a second limit relative to the flux threshold. The first limit and the second limit may be scaled relative to the flux threshold based on one or more of the target speed, the load demand, or the bus voltage. The control device may be configured to compare the estimated flux with the first limit, and reset the estimated flux to the second limit based on determining that the estimated flux satisfies the first limit.

公开(公告)号：US10476421B1

公开(公告)日：2019-11-12

申请号：US16115148

申请日：2018-08-28

申请人： Caterpillar Inc.

发明人： Ahmed Khalil ,  Carlos Nino Baron ,  Chad Brewer ,  Jackson Wai ,  Yash Bhatia

IPC分类号： H02P23/00 ,  H02P25/08 ,  H02P6/17 ,  H02P25/092 ,  H02P6/08

摘要： A device may select an operation mode based on at least one of a motor speed, a motor transient speed, or a motor power command value. The operation mode may be selected from a group of operation modes including a single pulse mode, a continuous conduction mode, and a variable dwell continuous conduction mode. The device may control a switched reluctance motor using the operation mode.

公开(公告)号：US20160087570A1

公开(公告)日：2016-03-24

申请号：US14492988

申请日：2014-09-22

申请人： Caterpillar Inc.

发明人： Jackson Wai ,  Carlos Nino Baron ,  Jesse Gerdes ,  Ahmed Khalil

IPC分类号： H02P25/08

CPC分类号： H02P25/08 ,  B60L15/007 ,  B60L2200/36 ,  B60L2200/40 ,  B60L2220/18 ,  B60L2240/421 ,  B60L2240/423 ,  B60L2240/526 ,  H02P25/083 ,  Y02T10/644 ,  Y02T10/645 ,  Y02T10/7258 ,  Y02T90/16

摘要： A control system for a switched reluctance (SR) machine is disclosed. The SR machine may have a rotor and a stator. The control system may have a converter circuit operatively coupled to the stator and including a plurality of gates in selective communication with each phase of the stator, and a controller in communication with each of the stator and the converter circuit. The controller may be configured to command a fixed dwell of a theta-on angle and a theta-off angle and a varying current command to the plurality of gates when the SR machine is in a continuous conduction mode.

摘要翻译： 公开了一种用于开关磁阻（SR）机器的控制系统。 SR机器可以具有转子和定子。 控制系统可以具有可操作地耦合到定子并且包括与定子的每个相位选择性地连通的多个栅极的转换器电路以及与每个定子和转换器电路连通的控制器。 控制器可以被配置为当SR机器处于连续导通模式时，将θ-on角度和θ-off角度以及变化电流指令的固定驻留命令给多个门。

公开(公告)号：US20150318806A1

公开(公告)日：2015-11-05

申请号：US14266110

申请日：2014-04-30

申请人： CATERPILLAR INC

发明人： Jackson Wai ,  Carlos Nino Baron ,  Jesse Gerdes ,  Ernesto Inoa ,  Ahmed Khalil

IPC分类号： H02P6/10

CPC分类号： H02P25/098 ,  B62D5/046 ,  H02K29/08 ,  H02P6/10 ,  H02P6/14 ,  Y02T10/7258

摘要： A method of controlling an electric motor may include determining a desired torque at the electric motor. A current at a first phase of the electric motor may be calculated at a controller. The calculated current may be a current that results in supplying the desired torque at the electric motor. The controller may compare the calculated current to a predetermined threshold current, and when the calculated current is greater than the predetermined threshold current, the controller may reduce the calculated current to the predetermined threshold current and adjust a current in a second phase adjacent to the first phase of the electric motor to continue to supply the desired torque at the electric motor.

摘要翻译： 控制电动机的方法可以包括确定电动机的期望转矩。 可以在控制器处计算电动机的第一阶段的电流。 计算出的电流可以是导致在电动机上提供期望转矩的电流。 控制器可以将计算的电流与预定的阈值电流进行比较，并且当所计算的电流大于预定的阈值电流时，控制器可以将计算出的电流减小到预定的阈值电流，并且调节与第一 电动机的相位继续在电动机上提供期望的转矩。