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1. 发明申请

US20110089883A1 MOTOR PHASE WINDING FAULT DETECTION METHOD AND APPARATUS 审中-公开
标题翻译：电机相绕组故障检测方法及装置
公开(公告)号：US20110089883A1
公开(公告)日：2011-04-21
申请号：US12582733
申请日：2009-10-21
申请人： Mohammad N. Anwar , S.M. N. Hasan , Khwaja M. Rahman , Silva Hiti , Steven E. Schulz , Sean E. Gleason
发明人： Mohammad N. Anwar , S.M. N. Hasan , Khwaja M. Rahman , Silva Hiti , Steven E. Schulz , Sean E. Gleason
IPC分类号： G01R31/06
CPC分类号： G01R31/343 , G01R31/346
摘要： 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 zero 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.
摘要翻译：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：归一化零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。

2. 发明申请

US20110187304A1 MOTOR PHASE WINDING FAULT DETECTION METHOD AND APPARATUS 有权
标题翻译：电机相绕组故障检测方法及装置
公开(公告)号：US20110187304A1
公开(公告)日：2011-08-04
申请号：US12698221
申请日：2010-02-02
申请人： Mohammad N. Anwar , S.M. N. Hasan , Khwaja M. Rahman , Silva Hiti , Steven E. Schulz , Sean E. Gleason
发明人： Mohammad N. Anwar , S.M. N. Hasan , Khwaja M. Rahman , Silva Hiti , Steven E. Schulz , Sean E. Gleason
IPC分类号： G01R31/06
CPC分类号： G01R31/343
摘要： 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.
摘要翻译：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。

3. 发明申请

US20130077194A1 PROTECTION OF MOTOR DRIVE SYSTEMS FROM CURRENT SENSOR FAULTS 有权
标题翻译：从电流传感器故障保护电机驱动系统
公开(公告)号：US20130077194A1
公开(公告)日：2013-03-28
申请号：US13244052
申请日：2011-09-23
申请人： S.M. N. HASAN , STEVEN E. SCHULZ , DAVID P. TASKY
发明人： S.M. N. HASAN , STEVEN E. SCHULZ , DAVID P. TASKY
IPC分类号： H02H9/02 , H02H7/08 , G01R31/34
CPC分类号： H02P29/022 , H02H7/00 , H02P21/22 , H02P29/0243 , H02P29/032
摘要： Methods and apparatus are provided for detecting a phase current sensor fault in a multi-phase electrical motor. The method comprises, receiving an input torque command T* and measuring a set of feedback signals of the motor including a phase current Ix for each of the phases of the motor, generating direct and quadrature command phase currents Id*, Iq* for the motor corresponding to a value of the input torque command T*, determining a total command current Is=[(Iq*)2+(Id*)2]½, generating a negative sequence current Ineg, where for three phases Ineg=(⅓)[Ia+(α2)Ib+(α)Ic], where α=ej2π/3, combining Ineg and Is to provide a normalized negative sequence current Inn=Ineg/Is, comparing the normalized negative sequence current Inn to a predetermined threshold value INN* to determine the presence of a phase current sensor fault, and executing a control action when Inn>INN*.
摘要翻译：提供了用于检测多相电动机中的相电流传感器故障的方法和装置。该方法包括：接收输入转矩指令T *并测量电动机的一组反馈信号，该电动机的每个相位包括相电流Ix，为电动机产生直接和正交指令相电流Id *，Iq * 对应于输入转矩指令T *的值，确定总指令电流Is = [（Iq *）2+（Id *）2] 1/2，产生负序电流Ineg，其中三相Ineg =（1/3） [Ia +（α2）Ib +（α）Ic]，其中α= ej2＆pgr; / 3，组合Ineg和Is，以提供归一化的负序电流Inn = Ineg / Is，将归一化负序电流Inn与预定阈值INN *确定相电流传感器故障的存在，并在Inn> INN *时执行控制动作。

4. 发明申请

US20100244760A1 SYSTEM AND METHOD FOR DETECTING LOSS OF ISOLATION WHILE AN AC MOTOR IS OPERATING 有权
标题翻译：用于检测交流电机运行时的隔离损失的系统和方法
公开(公告)号：US20100244760A1
公开(公告)日：2010-09-30
申请号：US12412053
申请日：2009-03-26
申请人： Mohammad N. Anwar , Bryan M. Ludwig , S.M. N. Hasan , Sean E. Gleason , Bon Ho Bae
发明人： Mohammad N. Anwar , Bryan M. Ludwig , S.M. N. Hasan , Sean E. Gleason , Bon Ho Bae
IPC分类号： H02P29/02 , H02H9/08 , G01R31/34
CPC分类号： G01R31/343 , G01R31/025 , H02P29/00
摘要： 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.
摘要翻译：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

US08164298B2 System and method for detecting loss of isolation while an AC motor is operating 有权
标题翻译：交流电机工作时检测隔离损失的系统和方法
公开(公告)号：US08164298B2
公开(公告)日：2012-04-24
申请号：US12412053
申请日：2009-03-26
申请人： Mohammad N. Anwar , Bryan M. Ludwig , S.M. N. Hasan , Sean E. Gleason , Bon Ho Bae
发明人： Mohammad N. Anwar , Bryan M. Ludwig , S.M. N. Hasan , Sean E. Gleason , Bon Ho Bae
IPC分类号： H02P3/18
CPC分类号： G01R31/343 , G01R31/025 , H02P29/00
摘要： 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.
摘要翻译：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。

6. 发明申请

US20110169438A1 METHOD AND SYSTEM FOR CONTROLLING AN ELECTRIC MOTOR USING ZERO CURRENT OFFSET VALUE CANCELLATION 有权
标题翻译：使用零电流偏移值取消控制电动机的方法和系统
公开(公告)号：US20110169438A1
公开(公告)日：2011-07-14
申请号：US12687496
申请日：2010-01-14
申请人： S.M. N. HASAN , BRIAN A. WELCHKO , DAVID P. TASKY , JUSTIN O. NIELSEN , SILVA HITI
发明人： S.M. N. HASAN , BRIAN A. WELCHKO , DAVID P. TASKY , JUSTIN O. NIELSEN , SILVA HITI
IPC分类号： H02P6/18
CPC分类号： H02P21/0003 , H02P21/22 , H02P27/08
摘要： Methods and systems for controlling an electric motor are provided. The electric motor includes at least one winding. A winding current flowing through the at least one winding is monitored. The winding current has an oscillating component and an offset component. The offset component of the winding current is isolated from the oscillating component of the winding current. The electric motor is controlled based on the offset component of the winding current.
摘要翻译：提供了用于控制电动机的方法和系统。电动机包括至少一个绕组。监测流经至少一个绕组的绕组电流。绕组电流具有振荡分量和偏移分量。绕组电流的偏移分量与绕组电流的振荡分量隔离。基于绕组电流的偏移分量来控制电动机。

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