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    Hybrid Hard Chopping and Soft Chopping Current Regulation
    23.
    发明申请
    Hybrid Hard Chopping and Soft Chopping Current Regulation 审中-公开
    混合硬切割和软斩波电流调节

    公开(公告)号：US20160301347A1

    公开(公告)日：2016-10-13

    申请号：US14683610

    申请日：2015-04-10

    Applicant: Caterpillar Inc.

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

    IPC: H02P25/08

    CPC classification number: H02P25/08 ,  H02P23/0027 ,  H02P23/03

    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 at least one limit of a hysteresis band and a switching period, and controlling the switches according to a hard chopping routine when the phase current does not reach the limit within the switching period.

    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，监测相对于滞后带的至少一个极限的相电流，以及 开关周期，并且当相电流在开关周期内未达到极限时，根据硬切断程序来控制开关。

    ELECTRIC DRIVE HAVING AN ACTIVELY CONTROLLED DC BUS
    25.
    发明申请
    ELECTRIC DRIVE HAVING AN ACTIVELY CONTROLLED DC BUS 有权
    具有动力控制的直流总线的电驱动

    公开(公告)号：US20160152146A1

    公开(公告)日：2016-06-02

    申请号：US14558001

    申请日：2014-12-02

    Applicant: Caterpillar Inc.

    Inventor： Rodwan Tarek Adra ,  Thomas Michael Sopko, JR. ,  Jackson Wai ,  Carlos Eduardo Nino Baron

    IPC: B60L11/00 ,  H02P31/00

    CPC classification number: B60L11/08 ,  B60L2200/32 ,  B60L2200/40 ,  H02M1/15 ,  H02M7/4826 ,  H02M7/5387 ,  H02M2001/008 ,  Y02T10/70 ,  Y02T10/7077

    Abstract: The present disclosure is directed to an electric drive. The electric drive may include a first power inverter, a second power inverter, and a positive DC bus connecting the first power inverter and the second power inverter. The electric drive may also include a first switch connected to the positive DC bus between the first power inverter and the second power inverter. The electric drive may include a second switch connected to the positive DC bus between the first power inverter and the second power inverter. The electric drive may further include a control unit connected to the first switch and to the second switch. The control unit may be configured to selectively allow current to pass through the first switch and the second switch.

    Abstract translation: 本公开涉及电驱动器。 电驱动器可以包括第一电力逆变器，第二电力逆变器和连接第一电力逆变器和第二电力逆变器的正直流母线。 电驱动器还可以包括在第一功率逆变器和第二功率逆变器之间连接到正DC总线的第一开关。 电驱动器可以包括连接到第一电力逆变器和第二电力逆变器之间的正DC总线的第二开关。 电驱动器还可以包括连接到第一开关和第二开关的控制单元。 控制单元可以被配置为选择性地允许电流通过第一开关和第二开关。

    Dual Generator Single DC Link Configuration for Electric Drive Propulsion System
    27.
    发明申请
    Dual Generator Single DC Link Configuration for Electric Drive Propulsion System 有权
    电动驱动推进系统的双发电机单直流链路配置

    公开(公告)号：US20140210208A1

    公开(公告)日：2014-07-31

    申请号：US13752012

    申请日：2013-01-28

    Applicant: CATERPILLAR INC.

    Inventor： Jackson Wai ,  Robert R. Sychra ,  Robert W. Lindsey ,  Thomas M. Sopko ,  Bruce H. Hein

    IPC: B60L11/08

    CPC classification number: B60L11/08 ,  B60L3/0061 ,  B60L3/12 ,  B60L15/20 ,  B60L2200/40 ,  B60L2210/30 ,  B60L2210/40 ,  B60L2240/421 ,  B60L2260/28 ,  Y02T10/645 ,  Y02T10/70 ,  Y02T10/7077 ,  Y02T10/7241 ,  Y02T10/7275

    Abstract: A machine is described that includes an electric drive for propelling the machine along a ground surface. The machine includes an electric power supply system configured to deliver operating electrical power to the electric drive. The electric power system includes a first generator and a second generator. The electric power system also includes a first rectifier coupled to the first generator and having a first direct current (DC) output and a second rectifier coupled to the second generator and having a second DC output. Both the first DC output and the second DC output are coupled to the single DC bus, thereby providing an arrangement for the first rectifier and the second rectifier to simultaneously provide power to the single DC bus. The electrical power system also includes a first inverter/controller coupled to the single DC bus and configured to provide a controlled alternating current to a first motor.

    Abstract translation: 描述了一种机器，其包括用于沿着地面推进机器的电驱动器。 该机器包括被配置为向电驱动器输送工作电力的电力供应系统。 电力系统包括第一发电机和第二发电机。 电力系统还包括耦合到第一发生器并具有第一直流（DC）输出的第一整流器和耦合到第二发生器并具有第二DC输出的第二整流器。 第一直流输出和第二直流输出都耦合到单个直流总线，从而为第一整流器和第二整流器提供同时向单个DC总线提供电力的布置。 电力系统还包括耦合到单个DC总线的第一逆变器/控制器，并且被配置为向第一电动机提供受控的交流电。

    Switched Reluctance Initial Rotor Position Estimation
    28.
    发明申请
    Switched Reluctance Initial Rotor Position Estimation 有权
    开关磁阻初始转子位置估计

    公开(公告)号：US20140117901A1

    公开(公告)日：2014-05-01

    申请号：US13664623

    申请日：2012-10-31

    Applicant: CATERPILLAR INC.

    Inventor： Jesse Gerdes ,  Jackson Wai ,  Mark Hartman ,  Ahmed Khalil ,  Carlos Nino Baron

    IPC: H02P6/18

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

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

    Abstract translation: 提供了一种估计具有转子和定子的开关磁阻（SR）机器的初始转子位置的方法。 该方法可以包括以下步骤：将SR机器的多个相位中的每一相中的相电流驱动到预定义的极限，执行与每个相位相关联的公共总线电压的积分，基于该相位确定每个相位的磁通值 并且基于通量值确定初始转子位置。

    TECHNIQUES FOR LIMITING POWER USING AN ACTIVE FRONT END
    29.
    发明公开
    TECHNIQUES FOR LIMITING POWER USING AN ACTIVE FRONT END 审中-公开

    公开(公告)号：US20240079876A1

    公开(公告)日：2024-03-07

    申请号：US17901585

    申请日：2022-09-01

    Applicant: Caterpillar Inc.

    Inventor： Seok-hee Han ,  Jesse R. Gerdes ,  Jackson Wai

    IPC: H02J3/16 ,  H02J7/00 ,  H02J7/34

    CPC classification number: H02J3/16 ,  H02J7/007182 ,  H02J7/345 ,  H02J2207/50

    Abstract: Techniques to limit electrical power when forming an electrical grid using an active front end unit having an inverter that is coupled to a capacitor (and inductor) that is coupled to an electrical grid. For example, to limit power, the integration of a commanded frequency of the system can be limited to be within a specified phase delta of a measured phase angle of an electrical grid voltage vector. The calculation from power limit to phase delta can be done when the phase of the electrical grid voltage vector has been determined to be accurate and is calculated based on the measured capacitor voltage, grid voltage, and the estimated voltage drop across the output components of the system.

    Switched reluctance self sensing active pulse torque compensation
    30.
    发明授权
    Switched reluctance self sensing active pulse torque compensation 有权

    公开(公告)号：US11515824B2

    公开(公告)日：2022-11-29

    申请号：US17129201

    申请日：2020-12-21

    Applicant: Caterpillar Inc.

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

    IPC: H02P6/18 ,  H02P25/098 ,  H02P21/20 ,  H02P25/08

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

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