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    Method and apparatus to reduce PWM voltage distortion in electric drives
    61.
    发明授权
    Method and apparatus to reduce PWM voltage distortion in electric drives 有权
    减少电力驱动器中PWM电压失真的方法和装置

    公开(公告)号：US07471526B2

    公开(公告)日：2008-12-30

    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: H02M7/537 ,  H02P23/00

    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。

    METHOD AND SYSTEM FOR TORQUE CONTROL IN PERMANENT MAGNET MACHINES
    62.
    发明申请
    METHOD AND SYSTEM FOR TORQUE CONTROL IN PERMANENT MAGNET MACHINES 有权
    永磁机械扭矩控制方法与系统

    公开(公告)号：US20080303475A1

    公开(公告)日：2008-12-11

    申请号：US11759266

    申请日：2007-06-07

    Applicant: Nitinkumar R. Patel ,  Brian A. Welchko ,  Bonho Bae ,  Steven E. Schulz

    Inventor： Nitinkumar R. Patel ,  Brian A. Welchko ,  Bonho Bae ,  Steven E. Schulz

    IPC: G05B19/042 ,  G05D23/19

    CPC classification number: H02P21/141 ,  H02P21/20

    Abstract: Methods and systems are provided for controlling permanent magnet machines. The method includes determining a maximum torque of the PM machine based on an error between a commanded d-axis flux and an estimated d-axis flux of the PM machine, and adjusting a torque command based on the maximum torque. The error associated with a variation between a current temperature and a nominal temperature of the PM machine.

    Abstract translation: 提供用于控制永磁机的方法和系统。 该方法包括基于指令的d轴磁通与PM机的估计d轴磁通之间的误差来确定PM机的最大转矩，以及基于最大转矩来调整转矩指令。 与PM机的当前温度和标称温度之间的变化相关的误差。

    METHOD AND SYSTEM FOR OPERATING A MOTOR TO REDUCE NOISE IN AN ELECTRIC VEHICLE
    63.
    发明申请
    METHOD AND SYSTEM FOR OPERATING A MOTOR TO REDUCE NOISE IN AN ELECTRIC VEHICLE 有权
    用于操作电动机以减少电动车噪声的方法和系统

    公开(公告)号：US20080298785A1

    公开(公告)日：2008-12-04

    申请号：US11756349

    申请日：2007-05-31

    Applicant: Nitinkumar R. Patel ,  Mohammad N. Anwar ,  Silva Hiti ,  Brian A. Welchko ,  Steven E. Schulz ,  Lisa M. Talarico

    Inventor： Nitinkumar R. Patel ,  Mohammad N. Anwar ,  Silva Hiti ,  Brian A. Welchko ,  Steven E. Schulz ,  Lisa M. Talarico

    IPC: H02P7/285

    CPC classification number: H02P27/08 ,  B60L2270/142 ,  H02M1/14 ,  Y02T10/642

    Abstract: Methods and systems for operating a motor coupled to an electrical bus in a vehicle are provided. Selected resonant frequencies of the electrical bus are determined. The selected resonant frequencies include a low resonant frequency and a high resonant frequency. Power is provided to the motor through at least one switch operating at a switching frequency. The switching frequency is controlled as a function of a rate of operation of the motor. The function is characterized by one of a first substantially linear portion having a first slope when the switching frequency is less than or equal to a selected switching frequency and a second substantially linear portion having a second slope if the switching frequency is greater than the selected frequency, the selected switching frequency being greater than the low resonant frequency and a substantially linear portion having a y-intercept being greater than the low resonant frequency.

    Abstract translation: 提供了用于操作耦合到车辆中的电气总线的马达的方法和系统。 确定电气总线的选定谐振频率。 所选择的谐振频率包括低谐振频率和高谐振频率。 通过至少一个以开关频率工作的开关将电力提供给电动机。 开关频率根据电机的运行速度进行控制。 该功能的特征在于当开关频率小于或等于所选择的开关频率时具有第一斜率的第一基本线性部分中的一个以及具有第二斜率的第二基本线性部分，如果开关频率大于所选择的频率 ，所选择的开关频率大于低谐振频率，并且具有大于低谐振频率的y截距的基本线性部分。

    APPARATUS, SYSTEMS, AND METHODS FOR REDUCING VOLTAGE SOURCE INVERTER LOSSES
    64.
    发明申请
    APPARATUS, SYSTEMS, AND METHODS FOR REDUCING VOLTAGE SOURCE INVERTER LOSSES 有权
    降低电压源逆变器损耗的装置，系统和方法

    公开(公告)号：US20080297100A1

    公开(公告)日：2008-12-04

    申请号：US11756421

    申请日：2007-05-31

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

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

    IPC: H02P27/04

    CPC classification number: H02M7/53875 ,  B60L15/025 ,  B60L2210/42 ,  B60L2240/70 ,  H02M2001/0054 ,  H02M2007/53876 ,  Y02T10/643 ,  Y02T10/7241 ,  Y02T10/7291 ,  Y02T90/16

    Abstract: Apparatus, systems, and methods are provided for reducing voltage source inverter losses. One apparatus includes a sensor couplable to the motor and configured to sense an operating frequency of the motor and an amount of torque produced by the motor. The apparatus also includes a controller coupled to the sensor, the controller configured to determine a zero vector modulation (ZVM) based on the sensed frequency and torque. A system includes means for sensing a threshold output frequency of the motor and means for sensing a threshold torque of the motor. The system also includes means for determining a ZVM for the inverter based on the sensed threshold frequency and threshold torque. One method includes sensing that a motor is operating below a threshold frequency and is producing torque above a threshold torque amount. The method also includes determining a ZVM for the inverter based on the sensed frequency and torque.

    Abstract translation: 提供了用于减少电压源逆变器损耗的装置，系统和方法。 一种装置包括可耦合到电动机并且被配置为感测电动机的工作频率和由电动机产生的转矩的量的传感器。 该装置还包括耦合到传感器的控制器，该控制器被配置成基于感测到的频率和转矩来确定零矢量调制（ZVM）。 系统包括用于感测电动机的阈值输出频率的装置和用于感测电动机的阈值转矩的装置。 该系统还包括用于基于感测的阈值频率和阈值扭矩来确定用于逆变器的ZVM的装置。 一种方法包括检测电动机工作在阈值频率以下并且产生高于阈值扭矩量的转矩。 该方法还包括基于感测的频率和转矩来确定逆变器的ZVM。

    METHOD AND SYSTEM FOR RESOLVER ALIGNMENT IN ELECTRIC MOTOR SYSTEM
    65.
    发明申请
    METHOD AND SYSTEM FOR RESOLVER ALIGNMENT IN ELECTRIC MOTOR SYSTEM 有权
    电动机系统中的分辨率对准方法与系统

    公开(公告)号：US20080272731A1

    公开(公告)日：2008-11-06

    申请号：US11743709

    申请日：2007-05-03

    Applicant: Steven E. Schulz ,  Sean E. Gleason ,  Brian A. Welchko

    Inventor： Steven E. Schulz ,  Sean E. Gleason ,  Brian A. Welchko

    IPC: H02P27/04 ,  G05B1/06 ,  G05B11/42

    CPC classification number: H02P21/06 ,  H02P21/14 ,  H02P2203/05

    Abstract: Methods and systems are provided for aligning a resolver in an electric motor system. The method includes commanding a d-axis current command and a speed command, operating an electric motor without a load in response to the d-axis current command and the speed command, determining a rotor speed in response to the speed command, and determining an offset of the resolver based on the speed command and the rotor speed when the rotor speed has substantially stabilized.

    Abstract translation: 提供了用于对准电动机系统中的旋转变压器的方法和系统。 该方法包括：命令d轴电流指令和速度指令，响应于d轴电流指令和速度指令，无负载地操作电动机，响应速度指令确定转子速度，并且确定 当转子速度基本上稳定时，基于速度指令和转子速度的旋转变压器的偏移。

    Systems and methods for monitoring current in an electric motor
    67.
    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
    68.
    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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