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1. 发明授权

US08405339B2 System and method for detecting fault in an AC machine 有权
标题翻译：用于检测交流电机故障的系统和方法
公开(公告)号：US08405339B2
公开(公告)日：2013-03-26
申请号：US12829205
申请日：2010-07-01
申请人： Pinjia Zhang , Bin Lu , Thomas G. Habetler
发明人： Pinjia Zhang , Bin Lu , Thomas G. Habetler
IPC分类号： G01R31/02
CPC分类号： G01R31/343
摘要： A system and method for detecting a rotor fault condition in an AC induction machine is disclosed. The system includes a processor programmed to receive voltage and current data from an AC induction machine, generate a current frequency spectrum from the current data, and identify rotor-fault related harmonics in the current frequency spectrum. The processor is also programmed to calculate a fault severity indicator using the voltage and current data, identified rotor-fault related harmonics, and motor specifications, analyze the fault severity indicator to determine a possibility of rotor fault. The processor generates an alert based on the possibility of rotor fault.
摘要翻译：公开了一种用于检测交流感应电机中的转子故障状况的系统和方法。该系统包括被编程为从AC感应电机接收电压和电流数据的处理器，从当前数据生成当前频谱，并识别当前频谱中的转子故障相关谐波。处理器还可编程为使用电压和电流数据，确定的转子故障相关谐波和电机规格来计算故障严重度指标，分析故障严重度指标以确定转子故障的可能性。处理器根据转子故障的可能性产生警报。

2. 发明申请

US20100156338A1 SYSTEM AND METHOD FOR MONITORING AND CONTROLLING STATOR WINDING TEMPERATURE IN A DE-ENERGIZED AC MOTOR 有权
标题翻译：用于监控和控制无能源交流电机中定子绕组温度的系统和方法
公开(公告)号：US20100156338A1
公开(公告)日：2010-06-24
申请号：US12341044
申请日：2008-12-22
申请人： Bin Lu , Charles John Luebke , Thomas G. Habetler , Pinjia Zhang , Scott K. Becker
发明人： Bin Lu , Charles John Luebke , Thomas G. Habetler , Pinjia Zhang , Scott K. Becker
IPC分类号： H02P29/02 , H02H7/08
CPC分类号： H02P23/14 , H02P29/64
摘要： A system and method for measuring and controlling stator winding temperature in an AC motor while idling is disclosed. The system includes a circuit having an input connectable to an AC source and an output connectable to an input terminal of a multi-phase AC motor. The circuit further includes a plurality of switching devices to control current flow and terminal voltages in the multi-phase AC motor and a controller connected to the circuit. The controller is configured to activate the plurality of switching devices to create a DC signal in an output of the motor control device corresponding to an input to the multi-phase AC motor, determine or estimate a stator winding resistance of the multi-phase AC motor based on the DC signal, and estimate a stator temperature from the stator winding resistance. Temperature can then be controlled and regulated by DC injection into the stator windings.
摘要翻译：公开了一种用于在空转时测量和控制交流电动机中的定子绕组温度的系统和方法。该系统包括具有可连接到AC源的输入和可连接到多相AC电动机的输入端的输出的电路。电路还包括多个开关装置，用于控制多相AC电动机中的电流和端电压，以及连接到电路的控制器。控制器被配置为激活多个开关装置，以在对应于多相交流电动机的输入的电动机控制装置的输出中产生直流信号，确定或估计多相交流电动机的定子绕组电阻基于直流信号，并从定子绕组电阻估计定子温度。然后可以通过直流注入到定子绕组中来控制和调节温度。

3. 发明申请

US20100194329A1 SYSTEM AND METHOD FOR DETERMINING STATOR WINDING RESISTANCE IN AN AC MOTOR USING MOTOR DRIVES 有权
标题翻译：使用电机驱动的交流电机中确定定子绕组电阻的系统和方法
公开(公告)号：US20100194329A1
公开(公告)日：2010-08-05
申请号：US12363413
申请日：2009-01-30
申请人： Bin Lu , Thomas G. Habetler , Pinjia Zhang
发明人： Bin Lu , Thomas G. Habetler , Pinjia Zhang
IPC分类号： H02P27/00 , H02P23/14
CPC分类号： H02P21/141 , H02P21/16
摘要： A system and method for determining the stator winding resistance of AC motors is provided. The system includes an AC motor drive having an input connectable to an AC source and an output connectable to an input terminal of an AC motor, a pulse width modulation (PWM) converter having switches therein to control current flow and terminal voltages in the AC motor, and a control system connected to the PWM converter. The control system generates a command signal to cause the PWM converter to control an output of the AC motor drive corresponding to an input to the AC motor, selectively generates a modified command signal to cause the PWM converter to inject a DC signal into the output of the AC motor drive, and determines a stator winding resistance of the AC motor based on the DC signal of at least one of the voltage and current.
摘要翻译：提供了一种用于确定交流电动机的定子绕组电阻的系统和方法。该系统包括具有可连接到AC电源的输入端的AC电动机驱动器和可连接到AC电动机的输入端子的输出端，其中具有开关的脉宽调制（PWM）转换器，用于控制AC电动机中的电流和端电压以及连接到PWM转换器的控制系统。控制系统产生一个命令信号，使PWM转换器控制对应于AC电动机输入的交流电动机驱动的输出，选择性地产生修改的指令信号，使PWM转换器将DC信号注入到 AC电动机驱动器，并且基于电压和电流中的至少一个的DC信号来确定AC电动机的定子绕组电阻。

4. 发明申请

US20090051311A1 SYSTEM AND METHOD FOR DETERMINING STATOR WINDING RESISTANCE IN AN AC MOTOR 有权
标题翻译：用于确定交流电机中定子绕组电阻的系统和方法
公开(公告)号：US20090051311A1
公开(公告)日：2009-02-26
申请号：US12132484
申请日：2008-06-03
申请人： Bin Lu , Thomas G. Habetler , Pinjia Zhang , Peter J. Theisen
发明人： Bin Lu , Thomas G. Habetler , Pinjia Zhang , Peter J. Theisen
IPC分类号： H02P23/14 , H02K11/00
CPC分类号： H02P23/14 , G01R31/343
摘要： A system and method for determining stator winding resistance in an AC motor is disclosed. The system includes a circuit having an input connectable to an AC source and an output connectable to an input terminal of an AC motor. The circuit includes at least one contactor and at least one switch to control current flow and terminal voltages in the AC motor. The system also includes a controller connected to the circuit and configured to modify a switching time of the at least one switch to create a DC component in an output of the system corresponding to an input to the AC motor and determine a stator winding resistance of the AC motor based on the injected DC component of the voltage and current.
摘要翻译：公开了一种用于确定AC电动机中的定子绕组电阻的系统和方法。该系统包括具有可连接到AC电源的输入端和可连接到AC电动机的输入端子的输出的电路。该电路包括至少一个接触器和用于控制AC电动机中的电流和端电压的至少一个开关。该系统还包括连接到电路的控制器，其被配置为修改至少一个开关的切换时间，以在对应于AC电动机的输入的系统的输出中产生DC分量，并确定定子绕组电阻交流电机基于注入的直流分量的电压和电流。

5. 发明授权

US08084984B2 System and method for monitoring and controlling stator winding temperature in a de-energized AC motor 有权
标题翻译：断电交流电机中定子绕组温度的监测与控制系统及方法
公开(公告)号：US08084984B2
公开(公告)日：2011-12-27
申请号：US12341044
申请日：2008-12-22
申请人： Bin Lu , Charles John Luebke , Thomas G. Habetler , Pinjia Zhang , Scott K. Becker
发明人： Bin Lu , Charles John Luebke , Thomas G. Habetler , Pinjia Zhang , Scott K. Becker
IPC分类号： H02P1/26 , H02P23/14 , H02K11/00
CPC分类号： H02P23/14 , H02P29/64
摘要： A system and method for measuring and controlling stator winding temperature in an AC motor while idling is disclosed. The system includes a circuit having an input connectable to an AC source and an output connectable to an input terminal of a multi-phase AC motor. The circuit further includes a plurality of switching devices to control current flow and terminal voltages in the multi-phase AC motor and a controller connected to the circuit. The controller is configured to activate the plurality of switching devices to create a DC signal in an output of the motor control device corresponding to an input to the multi-phase AC motor, determine or estimate a stator winding resistance of the multi-phase AC motor based on the DC signal, and estimate a stator temperature from the stator winding resistance. Temperature can then be controlled and regulated by DC injection into the stator windings.
摘要翻译：公开了一种用于在空转时测量和控制交流电动机中的定子绕组温度的系统和方法。该系统包括具有可连接到AC源的输入和可连接到多相AC电动机的输入端的输出的电路。电路还包括多个开关装置，用于控制多相AC电动机中的电流和端电压，以及连接到电路的控制器。控制器被配置为激活多个开关装置，以在对应于多相交流电动机的输入的电动机控制装置的输出中产生直流信号，确定或估计多相交流电动机的定子绕组电阻基于直流信号，并从定子绕组电阻估计定子温度。然后可以通过直流注入到定子绕组中来控制和调节温度。

6. 发明授权

US08384338B2 System and method for determining stator winding resistance in an AC motor using motor drives 有权
标题翻译：使用电机驱动器确定交流电动机中的定子绕组电阻的系统和方法
公开(公告)号：US08384338B2
公开(公告)日：2013-02-26
申请号：US12363413
申请日：2009-01-30
申请人： Bin Lu , Thomas G. Habetler , Pinjia Zhang
发明人： Bin Lu , Thomas G. Habetler , Pinjia Zhang
IPC分类号： H02P23/00
CPC分类号： H02P21/141 , H02P21/16
摘要： A system and method for determining the stator winding resistance of AC motors is provided. The system includes an AC motor drive having an input connectable to an AC source and an output connectable to an input terminal of an AC motor, a pulse width modulation (PWM) converter having switches therein to control current flow and terminal voltages in the AC motor, and a control system connected to the PWM converter. The control system generates a command signal to cause the PWM converter to control an output of the AC motor drive corresponding to an input to the AC motor, selectively generates a modified command signal to cause the PWM converter to inject a DC signal into the output of the AC motor drive, and determines a stator winding resistance of the AC motor based on the DC signal of at least one of the voltage and current.
摘要翻译：提供了一种用于确定交流电动机的定子绕组电阻的系统和方法。该系统包括具有可连接到AC电源的输入端的AC电动机驱动器和可连接到AC电动机的输入端子的输出端，其中具有开关的脉宽调制（PWM）转换器，用于控制AC电动机中的电流和端电压以及连接到PWM转换器的控制系统。控制系统产生一个命令信号，使PWM转换器控制对应于AC电动机输入的交流电动机驱动的输出，选择性地产生修改的指令信号，使PWM转换器将DC信号注入到 AC电动机驱动器，并且基于电压和电流中的至少一个的DC信号来确定AC电动机的定子绕组电阻。

7. 发明申请

US20120001580A1 SYSTEM AND METHOD FOR DETECTING FAULT IN AN AC MACHINE 有权
标题翻译：用于检测交流电机故障的系统和方法
公开(公告)号：US20120001580A1
公开(公告)日：2012-01-05
申请号：US12829205
申请日：2010-07-01
申请人： Pinjia Zhang , Bin Lu , Thomas G. Habetler
发明人： Pinjia Zhang , Bin Lu , Thomas G. Habetler
IPC分类号： G01R31/02
CPC分类号： G01R31/343
摘要： A system and method for detecting a rotor fault condition in an AC induction machine is disclosed. The system includes a processor programmed to receive voltage and current data from an AC induction machine, generate a current frequency spectrum from the current data, and identify rotor-fault related harmonics in the current frequency spectrum. The processor is also programmed to calculate a fault severity indicator using the voltage and current data, identified rotor-fault related harmonics, and motor specifications, analyze the fault severity indicator to determine a possibility of rotor fault. The processor generates an alert based on the possibility of rotor fault.
摘要翻译：公开了一种用于检测交流感应电机中的转子故障状况的系统和方法。该系统包括被编程为从AC感应电机接收电压和电流数据的处理器，从当前数据生成当前频谱，并识别当前频谱中的转子故障相关谐波。处理器还可编程为使用电压和电流数据，确定的转子故障相关谐波和电机规格来计算故障严重度指标，分析故障严重度指标以确定转子故障的可能性。处理器根据转子故障的可能性产生警报。

8. 发明授权

US07952318B2 System and method for determining stator winding resistance in an AC motor 有权
标题翻译：用于确定交流电动机中的定子绕组电阻的系统和方法
公开(公告)号：US07952318B2
公开(公告)日：2011-05-31
申请号：US12132484
申请日：2008-06-03
申请人： Bin Lu , Thomas G. Habetler , Pinjia Zhang , Peter J. Theisen
发明人： Bin Lu , Thomas G. Habetler , Pinjia Zhang , Peter J. Theisen
IPC分类号： H02P23/14 , H02K11/00
CPC分类号： H02P23/14 , G01R31/343
摘要： A system and method for determining stator winding resistance in an AC motor is disclosed. The system includes a circuit having an input connectable to an AC source and an output connectable to an input terminal of an AC motor. The circuit includes at least one contactor and at least one switch to control current flow and terminal voltages in the AC motor. The system also includes a controller connected to the circuit and configured to modify a switching time of the at least one switch to create a DC component in an output of the system corresponding to an input to the AC motor and determine a stator winding resistance of the AC motor based on the injected DC component of the voltage and current.
摘要翻译：公开了一种用于确定AC电动机中定子绕组电阻的系统和方法。该系统包括具有可连接到AC电源的输入端和可连接到AC电动机的输入端子的输出的电路。该电路包括至少一个接触器和用于控制AC电动机中的电流和端电压的至少一个开关。该系统还包括连接到电路的控制器，其被配置为修改至少一个开关的切换时间，以在对应于AC电动机的输入的系统的输出中产生DC分量，并确定定子绕组电阻交流电机基于注入的直流分量的电压和电流。

9. 发明申请

US20140035595A1 ON-LINE MONITORING SYSTEM FOR USE WITH ELECTRICAL ASSETS AND METHOD OF OPERATING THE SAME 有权
标题翻译：在线监测系统用于电气资产及其操作方法
公开(公告)号：US20140035595A1
公开(公告)日：2014-02-06
申请号：US13562514
申请日：2012-07-31
申请人： Prabhakar Neti , Pinjia Zhang , Manoj Ramprasad Shah
发明人： Prabhakar Neti , Pinjia Zhang , Manoj Ramprasad Shah
IPC分类号： G01R31/02
CPC分类号： G01R31/027 , G01F1/00 , G01F11/00 , G01F17/00 , G01R31/021 , G01R31/343
摘要： A system configured to monitor an operating electrical device includes a testing channel coupled to the device. The device is coupled to an electric power source through at least one electric power transmission channel. The power source is configured to transmit electric power at a first frequency. The testing channel is coupled to the power transmission channel. The system also includes a signal generator coupled to the testing channel. The signal generator is configured to inject testing signals into the testing channel at a second frequency that is greater than the first frequency. The system further includes at least one apparatus magnetically coupled to the power transmission channel. The magnetically coupled apparatus is configured to present a first impedance to the electric power at the first frequency and present a second impedance to the test signals at the second frequency. The second impedance is greater than the first impedance.
摘要翻译：被配置为监视操作的电气设备的系统包括耦合到该设备的测试通道。该装置通过至少一个电力传输通道耦合到电力源。电源被配置为以第一频率发送电力。测试通道耦合到电力传输通道。该系统还包括耦合到测试通道的信号发生器。信号发生器被配置为以大于第一频率的第二频率将测试信号注入测试信道。该系统还包括磁耦合到电力传输通道的至少一个装置。磁耦合装置被配置为以第一频率向电力呈现第一阻抗，并以第二频率向第一阻抗提供测试信号。第二阻抗大于第一阻抗。

10. 发明申请

US20130049733A1 FAULT DETECTION BASED ON CURRENT SIGNATURE ANALYSIS FOR A GENERATOR 有权
标题翻译：基于发电机电流分析的故障检测
公开(公告)号：US20130049733A1
公开(公告)日：2013-02-28
申请号：US13219753
申请日：2011-08-29
申请人： Prabhakar Neti , Manoj Ramprasad Shah , Karim Younsi , Mayank Tiwari , Pinjia Zhang
发明人： Prabhakar Neti , Manoj Ramprasad Shah , Karim Younsi , Mayank Tiwari , Pinjia Zhang
IPC分类号： G01N27/00
CPC分类号： G01R31/343 , F03D7/0264 , F03D7/0272 , F03D7/042 , Y02E10/723
摘要： A method of detecting faults in a wind turbine generator based on current signature analysis is disclosed herein. The method includes acquiring a set of electrical signals representative of an operating condition of a generator. Further, the electrical signals are processed to generate a normalized spectrum of electrical signals. A fault related to a gearbox or bearing or any other component associated with the generator is detected based on analyzing the current spectrum.
摘要翻译：本文公开了一种基于当前签名分析来检测风力涡轮发电机中的故障的方法。该方法包括获取代表发电机的运行状态的一组电信号。此外，处理电信号以产生电信号的归一化频谱。基于分析当前频谱来检测与变速箱或轴承或与发电机相关的任何其它部件相关的故障。

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