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    SWITCHED RELUCTANCE SELF SENSING ACTIVE PULSE TORQUE COMPENSATION
    4.
    发明申请
    SWITCHED RELUCTANCE SELF SENSING ACTIVE PULSE TORQUE COMPENSATION 审中-公开

    公开(公告)号：WO2022140101A1

    公开(公告)日：2022-06-30

    申请号：PCT/US2021/063175

    申请日：2021-12-14

    Applicant: CATERPILLAR INC.

    Inventor： GERDES, Jesse R. ,  WAI, Jackson ,  KHALIL, Ahmed ,  THOME, James Michael ,  ABDUL, Sajan ,  ASHFAQ, Amara

    IPC: H02P6/185 ,  H02P25/089

    Abstract: A system (102) and method for torque compensation in a switched reluctance (SR) machine (104) disposed on a machine (100) is disclosed. The system (102) may comprise a SR machine (104), an inverter (122) and a controller (124). The controller (124) is in operable communication with the inverter (122) and is configured to determine a commanded main current associated with energization by a main current (138) of a first portion of the plurality of windings (130) for a controlling phase (132), and determine a commanded parasitic current associated with energization by a parasitic current (140) of a second portion of the windings (130) in a non-controlling phase (134). The controller (124) is further configured to determine an offset current (142) based on the commanded parasitic current, and determine a target current (136) based on a first sum of the commanded main current and the offset current (142), and command the inverter (122) to actuate the target current (136) in the first portion of the windings (130) during the controlling phase (132).

    CURRENT PROFILE STRATEGY FOR MINIMIZING TORQUE RIPPLE AND CURRENT
    6.
    发明申请
    CURRENT PROFILE STRATEGY FOR MINIMIZING TORQUE RIPPLE AND CURRENT 审中-公开
    目前用于最小化扭矩和电流的配置文件策略

    公开(公告)号：WO2015167685A1

    公开(公告)日：2015-11-05

    申请号：PCT/US2015/021452

    申请日：2015-03-19

    Applicant: CATERPILLAR INC.

    Inventor： WAI, Jackson ,  BARON, Carlos Nino ,  GERDES, Jesse ,  INOA, Ernesto ,  KHALIL, Ahmed

    IPC: H02P21/14 ,  H02M1/14 ,  B60L15/20

    CPC classification number: H02P25/098 ,  B62D5/046 ,  H02K29/08 ,  H02P6/10 ,  H02P6/14 ,  Y02T10/7258

    Abstract: A method (200) of controlling an electric motor (116) may include determining a desired torque at the electric motor (116). A current at a first phase (142) of the electric motor (116) may be calculated at a controller (166). The calculated current may be a current that results in supplying the desired torque at the electric motor (116). The controller (166) may compare the calculated current to a predetermined threshold current, and when the calculated current is greater than the predetermined threshold current, the controller (166) may reduce the calculated current to the predetermined threshold current and adjust a current in a second phase (146) adjacent to the first phase (142) of the electric motor (116) to continue to supply the desired torque at the electric motor (116).

    Abstract translation: 控制电动机（116）的方法（200）可以包括确定电动机（116）处的期望转矩。 在电动机（116）的第一阶段（142）处的电流可以在控制器（166）处计算。 计算出的电流可以是导致在电动机（116）处提供期望转矩的电流。 控制器（166）可以将所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（166）可以将计算出的电流减小到预定的阈值电流并调整电流 邻近电动机（116）的第一相（142）的第二相（146）继续在电动机（116）处供应期望的扭矩。

    SWITCHED RELUCTANCE MOTOR POWER ESTIMATION COMPENSATION FOR VARIABLE DC-LINK VOLTAGE
    7.
    发明申请
    SWITCHED RELUCTANCE MOTOR POWER ESTIMATION COMPENSATION FOR VARIABLE DC-LINK VOLTAGE 审中-公开

    公开(公告)号：WO2018226547A1

    公开(公告)日：2018-12-13

    申请号：PCT/US2018/035777

    申请日：2018-06-04

    Applicant: CATERPILLAR INC.

    Inventor： MILLER, Jason L. ,  INOA, Ernesto ,  GERDES, Jesse ,  CROSMAN III, Alexander C. ,  NINO-BARON, Carlos E. ,  SOPKO JR., Thomas M. ,  WAI, Jackson ,  KHALIL, Ahmed

    IPC: H02P25/08 ,  H02P6/08 ,  E02F9/20

    Abstract: A control system (200) for a switched reluctance (SR) motor (206) includes a Direct Current (DC) power source (202), and an inverter (204). The control system (200) includes a user interface configured to enable an operator to specify a desired torque output. The control system (200) further includes a controller (216) which converts a DC current from the Alternating Current (AC) supplied to the SR motor (206) by the inverter (204). The controller (216) estimates an actual power output generated by the SR motor (206) based on a DC voltage supplied by the DC power source (202) to the inverter (204), and the converted DC current. The controller (216) estimates an actual torque output based on the actual power output and a rotational speed of the SR motor (206). The controller (216) compares the actual torque output and a desired torque output to calculate a torque error. The controller (216) adjusts a torque output limit and the rotational speed of the SR motor (206).

    ADJUSTABLE PULSE INJECTION IN ELECTRIC MACHINE CONTROL
    8.
    发明申请
    ADJUSTABLE PULSE INJECTION IN ELECTRIC MACHINE CONTROL 审中-公开

    公开(公告)号：WO2018111839A1

    公开(公告)日：2018-06-21

    申请号：PCT/US2017/065756

    申请日：2017-12-12

    Applicant: CATERPILLAR INC.

    Inventor： KHALIL, Ahmed ,  HAN, Seok-hee ,  WAI, Jackson ,  SONTH, Sangameshwar ,  GERDES, Jesse ,  THORNE, James, M.

    IPC: H02P27/08 ,  H02P6/18

    Abstract: A control system (126) is provided for an electric machine (106) having a rotor (110) and a stator (112). The control system (126) has a converter circuit (116) in electrical communication with the stator (112) and a controller (128) in electrical communication with the converter circuit (116). The controller (128) is configured to receive a first signal indicating a torque applied to or output by the rotor (110) and receive a second signal indicating a rotational speed of the rotor (110). The controller (128) is also configured to determine at least one characteristic of a pulse signal based on at least one of the first or second signal. The controller (128) is also configured to inject the pulse signal into one or more phases of the stator (112) via the converter circuit (116) according to the determined at least one characteristic. The controller (128) is also configured to determine a position of the rotor based on the injected pulse signal.

    SWITCHED RELUCTANCE INITIAL ROTOR POSITION ESTIMATION
    9.
    发明申请
    SWITCHED RELUCTANCE INITIAL ROTOR POSITION ESTIMATION 审中-公开
    开关式转子初始转子位置估计

    公开(公告)号：WO2014070288A1

    公开(公告)日：2014-05-08

    申请号：PCT/US2013/056093

    申请日：2013-08-22

    Applicant: CATERPILLAR INC.

    Inventor： GERDES, Jesse ,  WAI, Jackson ,  HARTMAN, Mark ,  KHALIL, Ahmed ,  BARON, Carlos, Nino

    IPC: H02P25/08 ,  H02P6/16

    CPC classification number: H02P6/182 ,  H02P25/083 ,  H02P25/089 ,  H02P2203/01 ,  H02P2203/03

    Abstract: A method (130) of estimating an initial rotor (110) position of a switched reluctance (SR) machine (106) having a rotor (110) and a stator (112) is provided. The method (130) may comprise the steps of driving a phase current (132) in each of a plurality of phases of the sr machine (106) to a predefined limit (134), performing an integration of a common bus (114) voltage associated with each phase, determining a flux value for each phase based on the integrations, and determining the initial rotor (110) position based on the flux values.

    Abstract translation: 提供了一种估计具有转子（110）和定子（112）的开关磁阻（SR）机器（106）的初始转子（110）位置的方法（130）。 方法（130）可以包括以下步骤：将sr机器（106）的多个相位中的每一相中的相电流（132）驱动到预定极限（134），执行公共总线（114）电压 与每个相关联，基于积分确定每个相的通量值，以及基于通量值确定初始转子（110）位置。

    SWITCHING STRATEGY FOR SWITCHED RELUCTANCE MACHINE
    10.
    发明申请
    SWITCHING STRATEGY FOR SWITCHED RELUCTANCE MACHINE 审中-公开
    开关式电机切换策略

    公开(公告)号：WO2013085943A1

    公开(公告)日：2013-06-13

    申请号：PCT/US2012/067843

    申请日：2012-12-05

    Applicant: CATERPILLAR INC.

    Inventor： KHALIL, Ahmed ,  WAI, Jackson ,  GERDES, Jesse ,  SIEGLE, James ,  HARTMAN, Mark ,  WILLIAMS, Joshua

    IPC: H02P25/08

    CPC classification number: H02P25/08

    Abstract: A method of controlling a motor is provided. The method may determine a speed of the motor, and engage a soft chopping routine on a first switch and a second switch of each phase if the motor speed is relatively low. The first switch may be driven by a first pulse width modulated PWM signal and the second switch being driven by a second PWM signal. The first and second PWM signals may be altematingly configured such that at least one of the first switch and the second switch is closed at any point during the distributed soft chopping routine and both the first switch and the second switch are never simultaneously open.

    Abstract translation: 提供一种控制电动机的方法。 如果电动机速度相对较低，则该方法可以确定电动机的速度，并且在每相的第一开关和第二开关上接合软斩波程序。 第一开关可以由第一脉宽调制PWM信号驱动，第二开关由第二PWM信号驱动。 第一和第二PWM信号可以被替换地配置成使得第一开关和第二开关中的至少一个在分布式软斩波程序期间的任何点处闭合，并且第一开关和第二开关都不会同时断开。

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