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    Apparatus and methods for reducing resonance in multiple inverter systems
    31.
    发明授权
    Apparatus and methods for reducing resonance in multiple inverter systems 有权
    减少多个逆变器系统谐振的装置和方法

    公开(公告)号：US07714461B2

    公开(公告)日：2010-05-11

    申请号：US11874066

    申请日：2007-10-17

    Applicant: Brian A. Welchko

    Inventor： Brian A. Welchko

    IPC: H02J3/14 ,  H02J3/02

    CPC classification number: H02M7/537 ,  Y10T307/32 ,  Y10T307/328 ,  Y10T307/375 ,  Y10T307/461 ,  Y10T307/707

    Abstract: Apparatus, systems, and methods for reducing resonance in a multiple inverter system are provided. One apparatus includes an inverter coupled to a decoupling element, wherein the inverter and the decoupling elements are couplable to a power source. A system includes a motor vehicle power source including first positive and negative terminals, and a plurality of inverters coupled to the power source. Each inverter includes a second positive terminal coupled to the first positive terminal and a second negative terminal coupled to the first negative terminal. A first inverter of the plurality of inverters includes a decoupling element coupled between the first positive terminal and the positive terminal of the first inverter. One method includes operating first and second inverters at different frequencies, and controlling the impedance of a decoupling element coupled between a power source and the first inverter based on the second inverter frequency.

    Abstract translation: 提供了用于减少多个逆变器系统中的谐振的装置，系统和方法。 一种装置包括耦合到去耦元件的逆变器，其中逆变器和去耦元件可耦合到电源。 一种系统包括包括第一正极端子和负极端子的机动车辆电源以及耦合到电源的多个逆变器。 每个反相器包括耦合到第一正极端子的第二正极端子和耦合到第一负极端子的第二负极端子。 多个逆变器的第一反相器包括耦合在第一反相器的第一正极端子和正极端子之间的去耦元件。 一种方法包括以不同频率操作第一和第二反相器，并且基于第二反相器频率来控制耦合在电源和第一反相器之间的去耦元件的阻抗。

    PROTECTION FOR PERMANENT MAGNET MOTOR CONTROL CIRCUITS
    33.
    发明申请
    PROTECTION FOR PERMANENT MAGNET MOTOR CONTROL CIRCUITS 有权
    永磁电机控制电路的保护

    公开(公告)号：US20080304189A1

    公开(公告)日：2008-12-11

    申请号：US11758974

    申请日：2007-06-06

    Applicant: David Tang ,  Brian A. Welchko ,  Silva Hiti ,  Mark L. Selogie

    Inventor： David Tang ,  Brian A. Welchko ,  Silva Hiti ,  Mark L. Selogie

    IPC: H02H7/09

    CPC classification number: H02H7/0838

    Abstract: Methods and apparatus are provided for protecting a motor control circuit in a permanent magnet electric motor system. The permanent magnet electric motor system includes a permanent magnet electric motor having a predetermined number of windings corresponding to the phases of the permanent magnet electric motor and a direct current (DC) bus coupled to a power source for providing operational power for the electric motor system. A motor control circuit is connected to the DC bus for receiving the operational power therefrom and is connected to the windings of the permanent magnet electric motor for controlling the permanent magnet electric motor. A protection circuit is connected to the DC bus for receiving the voltage therefrom for operation of the protection circuit and for detecting predetermined motor control circuit fault conditions from voltage sensed on the DC bus and in response thereto providing protection for the motor control circuit.

    Abstract translation: 提供了用于保护永磁电动机系统中的电动机控制电路的方法和装置。 永磁电动机系统包括具有对应于永磁电动机的相位的预定数量的绕组的永磁电动机和耦合到用于为电动机系统提供动力的电源的直流（DC）母线 。 电动机控制电路连接到DC总线，用于从其接收操作电力，并连接到用于控制永磁电动机的永磁电动机的绕组。 保护电路连接到DC总线，用于从其接收电压用于保护电路的操作，并且用于从DC总线上感测到的电压检测预定的电机控制电路故障状况，并响应于此为电机控制电路提供保护。

    METHOD AND APPARATUS TO REDUCE PWM VOLTAGE DISTORTION IN ELECTRIC DRIVES
    34.
    发明申请
    METHOD AND APPARATUS TO REDUCE PWM VOLTAGE DISTORTION IN ELECTRIC DRIVES 有权
    降低电动机PWM电压失真的方法和装置

    公开(公告)号：US20080197902A1

    公开(公告)日：2008-08-21

    申请号：US11676574

    申请日：2007-02-20

    Applicant: Brian A. Welchko ,  Bonho Bae ,  Steven E. Schulz ,  Silva Hiti

    Inventor： Brian A. Welchko ,  Bonho Bae ,  Steven E. Schulz ,  Silva Hiti

    IPC: H03K3/017

    CPC classification number: H03K3/017 ,  H02M7/5395 ,  H02M2001/0025 ,  H02P27/06

    Abstract: Methods and apparatus are provided for reducing voltage distortion effects at low speed operation in electric drives. The method comprises receiving a first signal having a duty cycle with a range between minimum and maximum achievable duty cycles, producing a second duty cycle based on the minimum achievable duty cycle if the duty cycle is within a distortion range and less than a first clipping value, producing a second duty cycle based on the closer of minimum and maximum pulse widths if the duty cycle is within the distortion range and between the first and a second clipping value, producing a second duty cycle based on the maximum achievable duty cycle if the duty cycle is within the distortion range and greater than the second clipping value, and transmitting a second signal to the voltage source inverter having the second duty cycle.

    Abstract translation: 提供了用于在电驱动器中降低低速运行时的电压失真效应的方法和装置。 该方法包括接收具有在最小和最大可实现占空比之间的范围的占空比的第一信号，如果占空比在失真范围内并小于第一限幅值，则基于最小可实现占空比产生第二占空比 如果占空比在失真范围内，并且在第一和第二限幅值之间，则基于更小的最小和最大脉冲宽度产生第二占空比，如果占空比基于最大可实现的占空比，则产生第二占空比 循环处于失真范围内并且大于第二限幅值，并且将第二信号发送到具有第二占空比的电压源逆变器。

    TORQUE ESTIMATOR FOR IPM MOTORS
    35.
    发明申请
    TORQUE ESTIMATOR FOR IPM MOTORS 有权
    IPM电机的扭矩估计

    公开(公告)号：US20080183405A1

    公开(公告)日：2008-07-31

    申请号：US11668830

    申请日：2007-01-30

    Applicant: Brian A. Welchko ,  Silva Hiti ,  Steven E. Schulz

    Inventor： Brian A. Welchko ,  Silva Hiti ,  Steven E. Schulz

    IPC: G01L3/00

    CPC classification number: H02P23/14

    Abstract: In an embodiment of a method, the method includes measuring currents and voltages that are coupled to a motor that includes an internal permanent magnet and determining a reactive power in response to the measured currents and voltages. The method further includes estimating a first flux orthogonal to an axis of the internal permanent motor and estimating a second flux aligned with the axis of the internal permanent motor. Additionally, the method includes estimating a torque in response to the measured currents and the first and second fluxes.

    Abstract translation: 在方法的实施例中，该方法包括测量耦合到包括内部永磁体的电动机的电流和电压，并响应于测量的电流和电压来确定无功功率。 该方法还包括估计与内部永久电动机的轴正交的第一通量，并估计与内部永久电动机的轴线对准的第二通量。 另外，该方法包括响应于测量的电流和第一和第二通量来估计转矩。

    Systems and methods for monitoring current in an electric motor
    37.
    发明授权
    Systems and methods for monitoring current in an electric motor 有权
    用于监测电动机电流的系统和方法

    公开(公告)号：US08558496B2

    公开(公告)日：2013-10-15

    申请号：US13049653

    申请日：2011-03-16

    Applicant: Brian A. Welchko ,  Silva Hiti ,  Ronald W. Young ,  David Tang ,  Gregory S. Smith

    Inventor： Brian A. Welchko ,  Silva Hiti ,  Ronald W. Young ,  David Tang ,  Gregory S. Smith

    IPC: G05B5/00

    CPC classification number: B60L3/0038 ,  B60L2240/429 ,  B60L2240/529 ,  H02P29/027 ,  H02P29/032 ,  Y02T10/642

    Abstract: Systems and methods are provided for monitoring current in an electric motor. An electrical system includes a (DC) interface, an electric motor, an inverter module coupled between the DC interface and the electric motor, a first current sensor between a first phase leg of the inverter module and a first phase of the electric motor to measure a first current flowing through the first phase of the electric motor, a second current sensor between the first phase leg and the DC interface to measure a second current flowing through the first phase leg, and a control module coupled to the first current sensor and the second current sensor. The control module is configured to initiate remedial action based at least in part on a difference between the first current measured by the first current sensor and the second current measured by the second current sensor.

    Abstract translation: 提供了用于监视电动机中的电流的系统和方法。 电气系统包括（DC）接口，电动机，耦合在DC接口和电动机之间的逆变器模块，在逆变器模块的第一相支路和电动机的第一相之间的第一电流传感器，以测量 流过电动机的第一相的第一电流，在第一相支路和DC接口之间的第二电流传感器，以测量流过第一相支线的第二电流;以及控制模块，耦合到第一电流传感器和 第二电流传感器。 控制模块被配置为至少部分地基于由第一电流传感器测量的第一电流与由第二电流传感器测量的第二电流之间的差异来启动补救动作。

    Systems and methods for monitoring current in an electric motor
    38.
    发明授权
    Systems and methods for monitoring current in an electric motor 有权
    用于监测电动机电流的系统和方法

    公开(公告)号：US08339084B2

    公开(公告)日：2012-12-25

    申请号：US12723136

    申请日：2010-03-12

    Applicant: Brian A. Welchko

    Inventor： Brian A. Welchko

    IPC: G05B5/00

    CPC classification number: H02P29/0241 ,  H02M7/53873

    Abstract: Systems and methods are provided for monitoring current in an electric motor. An electrical system comprises a direct current (DC) interface, an electric motor, and an inverter module between the DC interface and the electric motor. A first current sensor is configured to measure a DC current flowing between the DC interface and the inverter module. A second current sensor is configured to measure a first phase current flowing through the first phase of the electric motor. A control module is coupled to the current sensors, and the control module is configured to determine an expected value for the first phase current based at least in part on the DC current measured by the first current sensor and take remedial action based on a difference between the expected value and the measured first phase current.

    Abstract translation: 提供了用于监视电动机中的电流的系统和方法。 电气系统包括直流（DC）接口，电动机以及DC接口和电动机之间的逆变器模块。 第一电流传感器被配置为测量在DC接口和逆变器模块之间流动的直流电流。 第二电流传感器被配置为测量流过电动机的第一相的第一相电流。 控制模块耦合到电流传感器，并且控制模块被配置为至少部分地基于由第一电流传感器测量的DC电流来确定第一相电流的期望值，并基于第一相电流的差异来采取补救动作 预期值和测量的第一相电流。

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