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    • 3. 发明授权
    • System and method for detecting loss of isolation while an AC motor is operating
    • 交流电机工作时检测隔离损失的系统和方法
    • US08164298B2
    • 2012-04-24
    • US12412053
    • 2009-03-26
    • Mohammad N. AnwarBryan M. LudwigS.M. N. HasanSean E. GleasonBon Ho Bae
    • Mohammad N. AnwarBryan M. LudwigS.M. N. HasanSean E. GleasonBon Ho Bae
    • H02P3/18
    • G01R31/343G01R31/025H02P29/00
    • Methods and systems are provided for detecting loss of isolation of a motor, connections, or phase cables while an AC motor is operating. The system includes a power supply that is substantially isolated from the ground or chassis having a power supply voltage, and a power inverter electrically coupled to the power supply. The power inverter is configured to provide AC current from the power supply in an AC phase at an AC terminal, with the phase having current at a fundamental frequency that controls the motor speed. An electric motor is electrically coupled to the AC terminal of the power inverter and has a chassis that is substantially electrically isolated from the AC terminal of the power inverter under normal operating conditions. A processor is configured to control the AC current provided by the power inverter. The processor is configured to receive a first voltage signal related to current flowing through a motor chassis. The first voltage signal includes a first component related to the fundamental frequency of the phases, and a second component related to the power supply voltage. The processor is further configured to filter the first voltage signal to attenuate the second component, to measure an amplitude of the first component, and to determine if an AC loss of isolation condition exists by comparing the amplitude of the first component to a fault value.
    • 提供了用于在AC电动机运行时检测电动机,连接或相位电缆的隔离损失的方法和系统。 该系统包括与具有电源电压的地面或底盘基本上隔离的电源,以及电耦合到电源的功率逆变器。 电力逆变器被配置为在AC端子处的AC相中提供来自电源的AC电流,其中相位具有控制电动机速度的基频的电流。 电动机电耦合到电力逆变器的AC端子,并且具有在正常操作条件下与电力逆变器的AC端子基本上电隔离的底盘。 处理器被配置为控制由电力逆变器提供的AC电流。 处理器被配置为接收与流过马达机箱的电流相关的第一电压信号。 第一电压信号包括与相的基频相关的第一分量和与电源电压有关的第二分量。 处理器还被配置为对第一电压信号进行滤波以衰减第二分量,以测量第一分量的振幅,并且通过将第一分量的幅度与故障值进行比较来确定是否存在隔离条件的AC损失。
    • 5. 发明授权
    • Control of a traction power inverter module in a vehicle having an electric traction motor
    • 控制具有电力牵引电动机的车辆中的牵引电力逆变器模块
    • US08536818B2
    • 2013-09-17
    • US13086532
    • 2011-04-14
    • Steven E. SchulzMohammad N. AnwarMichael J. GrimmerSilva Hiti
    • Steven E. SchulzMohammad N. AnwarMichael J. GrimmerSilva Hiti
    • G05B11/28
    • H02P27/08B60L11/1803Y02T10/642Y02T10/7005
    • A method for controlling a traction power inverter module (TPIM) in a vehicle includes determining a commanded output torque of the motor using a controller. The method further includes controlling the TPIM and motor using a discontinuous pulse width modulated (DPWM) signal when the commanded output torque is less than a calibrated torque threshold. A continuous pulse width modulated (CPWM) signal is used when the commanded output torque is greater than the threshold. The method may include determining a direction of a change in the commanded output torque, and controlling the TPIM, via the controller, using the DPWM signal only when the commanded output torque drops below a predetermined hysteresis level. A vehicle includes a traction motor producing a motor torque for propelling the vehicle, an ESS, a TPIM, and a controller configured as noted above.
    • 用于控制车辆中的牵引力逆变器模块(TPIM)的方法包括使用控制器确定电动机的命令输出转矩。 该方法还包括当指令的输出转矩小于校准转矩阈值时,使用不连续的脉宽调制(DPWM)信号来控制TPIM和电动机。 当指令输出转矩大于阈值时,使用连续脉宽调制(CPWM)信号。 该方法可以包括:仅当指令的输出转矩低于预定的滞后电平时,才通过控制器使用DPWM信号来确定所命令的输出转矩的改变的方向,并控制TPIM。 车辆包括产生用于推进车辆的电动机扭矩的牵引电动机,ESS,TPIM和如上所述配置的控制器。
    • 7. 发明授权
    • Motor phase winding fault detection method and apparatus
    • 电机相绕组故障检测方法及装置
    • US08362732B2
    • 2013-01-29
    • US12698221
    • 2010-02-02
    • Mohammad N. AnwarS. M. N. HasanKhwaja M. RahmanSilva HitiSteven E. SchulzSean E. Gleason
    • Mohammad N. AnwarS. M. N. HasanKhwaja M. RahmanSilva HitiSteven E. SchulzSean E. Gleason
    • G01R31/02
    • G01R31/343
    • A method of detecting a phase winding fault in a multi-phase electric machine is executable via a motor controller, and includes measuring feedback signals of the machine, including each phase current, and generating reference phase voltages for each phase. The method includes calculating a predetermined voltage value using the feedback signals and reference phase voltages, and comparing the voltage value to a corresponding threshold to determine the fault. A control action is executed when the voltage value exceeds the corresponding threshold. The voltage value is one or more of: a ratio of a normalized negative sequence voltage to a modulation index, an RMS voltage for each phase, and total harmonic distortion of each phase current. An apparatus detects the fault, and includes a motor controller and an algorithm as set forth above. The apparatus may include a voltage inverter for generating a multi-phase alternating current output for powering the machine.
    • 检测多相电机中的相绕组故障的方法可通过马达控制器执行,并且包括测量机器的反馈信号,包括每个相电流,并产生每相的参考相电压。 该方法包括使用反馈信号和参考相电压来计算预定电压值,并将电压值与相应的阈值进行比较以确定故障。 当电压值超过相应的阈值时,执行控制动作。 电压值是以下中的一个或多个:归一化负序电压与调制指数的比率,每相的RMS电压以及每个相电流的总谐波失真。 一种装置检测故障,并包括如上所述的马达控制器和算法。 该装置可以包括电压逆变器,用于产生用于为机器供电的多相交流输出。
    • 9. 发明授权
    • DC-DC power converter and control method
    • DC-DC电源转换器及控制方式
    • US08188616B2
    • 2012-05-29
    • US12732510
    • 2010-03-26
    • Erik Charles NordstromMohammad N. AnwarDavid P. TaskyAlan G. HolmesMehrdad Teimorzadeh
    • Erik Charles NordstromMohammad N. AnwarDavid P. TaskyAlan G. HolmesMehrdad Teimorzadeh
    • B60L1/00B60L3/00H02G3/00
    • B60R16/03F02N11/0814F02N11/0862H02M1/10
    • A vehicle includes a high-voltage (HV) energy storage system (ESS), an HV power bus, a DC-DC power converter electrically connected to the HV power bus, an HV bus connector, a low voltage (LV) battery power bus, and a pair of LV bus connectors. The vehicle includes a vehicle module electrically connected to the HV and LV bus connectors, an LV power bus electrically connected to the DC-DC power converter and to the module, and a controller. The controller has an algorithm that controls the converter to power the module via one of the LV bus connectors during a transient LV condition. The converter and a method of controlling the same are also provided, with the method including determining the LV condition, powering the vehicle module via one of the LV bus connectors during the transient LV condition, and powering the module via the other LV connector otherwise.
    • 车辆包括高压(HV)储能系统(ESS),高压电源总线,电连接到高压电源总线的直流 - 直流电力转换器,高压总线连接器,低压(LV)电池电源总线 ,以及一对LV总线连接器。 车辆包括电连接到HV和LV总线连接器的车辆模块,电连接到DC-DC电力转换器和模块的LV电力总线以及控制器。 控制器具有一个算法,控制转换器在瞬态LV状态期间通过其中一个LV总线连接器为模块供电。 还提供了转换器及其控制方法,该方法包括确定LV状态,并且在瞬态LV状态期间通过LV总线连接器中的一个为车辆模块供电,以及另外通过另一个LV连接器为模块供电。