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    Hybrid Soft Switching for Current Regulation in Switched Reluctance Machines
    4.
    发明申请
    Hybrid Soft Switching for Current Regulation in Switched Reluctance Machines 审中-公开
    开关磁阻电机电流调节的混合软开关

    公开(公告)号：US20160248362A1

    公开(公告)日：2016-08-25

    申请号：US14626635

    申请日：2015-02-19

    Applicant: CATERPILLAR INC.

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

    IPC: H02P25/08

    CPC classification number: H02P25/08 ,  H02P25/089

    Abstract: 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.

    Abstract translation: 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。

    Adjustable pulse injection in electric machine control
    6.
    发明授权
    Adjustable pulse injection in electric machine control 有权

    公开(公告)号：US10097117B2

    公开(公告)日：2018-10-09

    申请号：US15380790

    申请日：2016-12-15

    Applicant: Caterpillar Inc.

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

    IPC: H02P6/00 ,  H02P6/185 ,  H02P25/089

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

    Flux estimator for switched reluctance machines
    7.
    发明授权
    Flux estimator for switched reluctance machines 有权

    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.

    FLUX ESTIMATOR FOR SWITCHED RELUCTANCE MACHINES
    8.
    发明申请
    FLUX ESTIMATOR FOR SWITCHED RELUCTANCE MACHINES 有权

    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.

    Enforced Zero Voltage Loop
    9.
    发明申请
    Enforced Zero Voltage Loop 有权
    强制零电压回路

    公开(公告)号：US20150028788A1

    公开(公告)日：2015-01-29

    申请号：US13951068

    申请日：2013-07-25

    Applicant: Caterpillar, Inc.

    Inventor： Jackson Wai ,  Ahmed Khalil ,  Carlos Nino Baron ,  Jesse Gerdes ,  Brad A. Kough

    IPC: H02P27/06

    CPC classification number: H02P27/06 ,  H02P25/0925

    Abstract: A method of controlling a motor is provided. The method may determine one of a switching period, a fundamental cycle, and a current target per phase leg of the motor having at least one high voltage transition point; determine a dwell period to be enforced at the transition point between an engagement of a first switch of the phase leg and an engagement of a second switch of the phase leg where each of the first switch and the second switch may be selectively engageable between a first state and a second state; engage the first switch from the first state to the second state at the transition point; and engage the second switch from the first state to the second state after the transition point and upon expiration of the dwell period.

    Abstract translation: 提供一种控制电动机的方法。 该方法可以确定具有至少一个高电压转变点的电动机的开关周期，基本周期和每相支路的当前目标之一; 确定在所述相腿的第一开关的接合和所述相腿的第二开关的接合之间的过渡点处的停留时段，其中所述第一开关和所述第二开关中的每一个可以选择性地接合在第一 状态和第二状态; 在转换点将第一开关从第一状态转移到第二状态; 并且在转换点之后并且在停留时段期满时将第二开关从第一状态转移到第二状态。

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