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1. 发明申请

WO2006121694A2 ELECTRONIC OVERLOAD RELAY FOR MAINS-FED INDUCTION MOTORS 审中-公开
标题翻译：用于主电感电动机的电子过载继电器
公开(公告)号：WO2006121694A2
公开(公告)日：2006-11-16
申请号：PCT/US2006016749
申请日：2006-05-01
申请人： SQUARE D CO , GAO ZHI , HABETLER THOMAS G , HARLEY RONALD G , COLBY ROY STEPHEN
发明人： GAO ZHI , HABETLER THOMAS G , HARLEY RONALD G , COLBY ROY STEPHEN
IPC分类号： H02H6/00 , G01R31/34
CPC分类号： G01R31/343 , H02H6/005 , H02H7/085
摘要： An induction motor having a rotor and a stator is protected during running overloads by connecting the motor to an overload protection relay that can be tripped to interrupt power to the motor in the event of an overload, tracking the stator winding temperature of the motor during running overloads with a hybrid thermal model by online adjustment in the hybrid thermal model, and tripping the overload protection relay in response to a predetermined running overload condition represented by the tracked stator winding temperature. In one embodiment of the invention, the stator winding temperature is tracked by use of an online hybrid thermal model that uses the resistance of the rotor as an indicator of rotor temperature and thus of the thermal operating conditions of the motor. The hybrid thermal model incorporates rotor losses and heat transfer between the rotor and the stator, and approximates the thermal characteristics of the rotor and stator.
摘要翻译：具有转子和定子的感应电动机在运行过载期间通过将电动机连接到过载保护继电器而被保护，该过载保护继电器在过载的情况下可被跳闸以中断电动机的动力，跟踪电动机在运行期间的定子绕组温度通过混合热模型中的在线调整，利用混合热模型进行过载，并响应于由定子绕组温度跟踪的预定运行过载条件跳闸过载保护继电器。在本发明的一个实施例中，通过使用在线混合热模型来跟踪定子绕组温度，该在线混合热模型使用转子的电阻作为转子温度的指示器，并且因此用于电动机的热操作条件。混合热模型包括转子损耗和转子和定子之间的热传递，并且接近转子和定子的热特性。

2. 发明申请

WO2010086729A3 SYSTEM AND METHOD FOR DETERMINING STATOR WINDING RESISTANCE IN AN AC MOTOR USING MOTOR DRIVES 审中-公开
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：WO2010086729A3
公开(公告)日：2011-11-24
申请号：PCT/IB2010000175
申请日：2010-01-29
申请人： EATON CORP , LU BIN , HABETLER THOMAS G , ZHANG PINJIA
发明人： LU BIN , HABETLER THOMAS G , ZHANG PINJIA
IPC分类号： H02P21/14 , H02H7/08 , 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。

3. 发明申请

WO2010086729A2 SYSTEM AND METHOD FOR DETERMINING STATOR WINDING RESISTANCE IN AN AC MOTOR USING MOTOR DRIVES 审中-公开
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：WO2010086729A2
公开(公告)日：2010-08-05
申请号：PCT/IB2010/000175
申请日：2010-01-29
申请人： EATON CORPORATION , LU, Bin , HABETLER, Thomas, G. , ZHANG, Pinjia
发明人： LU, Bin , HABETLER, Thomas, G. , ZHANG, Pinjia
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

WO2006121694A3 ELECTRONIC OVERLOAD RELAY FOR MAINS-FED INDUCTION MOTORS 审中-公开
公开(公告)号：WO2006121694A3
公开(公告)日：2006-11-16
申请号：PCT/US2006/016749
申请日：2006-05-01
申请人： SQUARE D COMPANY , GAO, Zhi , HABETLER, Thomas, G. , HARLEY, Ronald, G. , COLBY, Roy, Stephen
发明人： GAO, Zhi , HABETLER, Thomas, G. , HARLEY, Ronald, G. , COLBY, Roy, Stephen
IPC分类号： H02H6/00 , G01R31/34
摘要： An induction motor having a rotor and a stator is protected during running overloads by connecting the motor to an overload protection relay that can be tripped to interrupt power to the motor in the event of an overload, tracking the stator winding temperature of the motor during running overloads with a hybrid thermal model by online adjustment in the hybrid thermal model, and tripping the overload protection relay in response to a predetermined running overload condition represented by the tracked stator winding temperature. In one embodiment of the invention, the stator winding temperature is tracked by use of an online hybrid thermal model that uses the resistance of the rotor as an indicator of rotor temperature and thus of the thermal operating conditions of the motor. The hybrid thermal model incorporates rotor losses and heat transfer between the rotor and the stator, and approximates the thermal characteristics of the rotor and stator.

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