公开(公告)号：US08903668B2

公开(公告)日：2014-12-02

申请号：US13083841

申请日：2011-04-11

申请人： Yilu Zhang ,  Siwei Cheng ,  Mutasim A. Salman

发明人： Yilu Zhang ,  Siwei Cheng ,  Mutasim A. Salman

IPC分类号： G01P3/42 ,  G01R25/00 ,  G01R27/00 ,  H02J7/14 ,  B60W10/08

CPC分类号： H02J7/1415 ,  B60W10/08 ,  B60Y2400/303 ,  B60Y2400/3086 ,  G01P3/44 ,  H02J7/1461

摘要： A system and method for determining the speed of an alternator, for example, a vehicle alternator. The method includes measuring the current or voltage of a vehicle battery for a predetermined period of time, and then notch filtering the measured current or voltage signal to remove known harmonics. A limited data point Fast Fourier Transform (FFT) spectrum analysis operation is performed to identify the frequency peaks in the filtered signal, where the highest peak represents a ripple current on the DC alternator signal. The highest peak in the FFT signal is identified, and an interpolation process is performed between that peak and an adjacent peak in the data to identify the actual frequency of the ripple current. The ripple current is then converted to the speed of the alternator.

摘要翻译： 用于确定交流发电机的速度的系统和方法，例如车辆交流发电机。 该方法包括在预定时间段内测量车辆电池的电流或电压，然后对所测量的电流或电压信号进行陷波滤波以去除已知的谐波。 执行有限数据点快速傅里叶变换（FFT）频谱分析操作，以识别滤波信号中的频率峰值，其中最高峰值表示DC交流发电机信号上的纹波电流。 识别FFT信号中的最高峰，并且在数据中的该峰值和相邻峰值之间进行插值处理，以识别纹波电流的实际频率。 然后将纹波电流转换为交流发电机的速度。

公开(公告)号：US08866428B2

公开(公告)日：2014-10-21

申请号：US13151568

申请日：2011-06-02

申请人： Lei Hao ,  Yilu Zhang ,  Siwei Cheng

发明人： Lei Hao ,  Yilu Zhang ,  Siwei Cheng

IPC分类号： H02P7/00 ,  H02P29/02 ,  H02P29/00 ,  G01K7/22 ,  G01R31/34

CPC分类号： H02P29/0055 ,  G01K7/22 ,  G01K2205/00 ,  G01K2217/00 ,  G01R31/343 ,  H02P29/028 ,  H02P29/032 ,  H02P29/64

摘要： A method for determining a temperature of an electric motor including stator windings includes injecting an AC current into a D-axis current of a stator winding at a frequency that is synchronized with a control frequency of the electric motor, determining a DC-phase current, determining a resistance of the stator winding corresponding to the DC-phase current and an applied voltage, and determining a temperature of the electric motor as a function of the resistance of the stator winding.

摘要翻译： 一种用于确定包括定子绕组的电动机的温度的方法包括以与电动机的控制频率同步的频率将AC电流注入到定子绕组的D轴电流中，确定DC相电流， 确定对应于DC相电流的定子绕组的电阻和施加的电压，以及根据定子绕组的电阻确定电动机的温度。

公开(公告)号：US08471589B2

公开(公告)日：2013-06-25

申请号：US13161939

申请日：2011-06-16

申请人： Yilu Zhang ,  Siwei Cheng ,  Mutasim A. Salman

发明人： Yilu Zhang ,  Siwei Cheng ,  Mutasim A. Salman

IPC分类号： G01R31/34

CPC分类号： G01R31/343 ,  G01R31/346

摘要： A method for detecting whether the stator in a vehicle alternator has a turn-to-turn short circuit. The method includes determining an output current or voltage signal of the alternator, where the output current or voltage signal includes a ripple current frequency as a result of an AC-to-DC conversion. The method determines the speed of the alternator and a current output of the alternator. The method then determines the ripple current frequency of the alternator from the alternator speed, and determines a winding frequency from the ripple current frequency. The method performs an FFT analysis on the voltage and current signal, determines an amplitude of the winding frequency and compares the amplitude of the winding frequency to a predetermined amplitude, where if the difference exceeds a predetermined threshold, a turn-to-turn short circuit is likely occurring.

摘要翻译： 一种用于检测车辆交流发电机中的定子是否具有匝间短路的方法。 该方法包括确定交流发电机的输出电流或电压信号，其中输出电流或电压信号包括作为AC到DC转换的结果的纹波电流频率。 该方法确定交流发电机的速度和交流发电机的电流输出。 然后，该方法从交流发电机速度确定交流发电机的纹波电流频率，并从纹波电流频率确定绕组频率。 该方法对电压和电流信号进行FFT分析，确定绕组频率的幅度，并将绕组频率的振幅与预定幅度进行比较，其中如果差超过预定阈值，则匝间短路 很可能发生。

公开(公告)号：US20120319722A1

公开(公告)日：2012-12-20

申请号：US13161939

申请日：2011-06-16

申请人： Yilu Zhang ,  Siwei Cheng ,  Mutasim A. Salman

发明人： Yilu Zhang ,  Siwei Cheng ,  Mutasim A. Salman

IPC分类号： G01R31/34

CPC分类号： G01R31/343 ,  G01R31/346

摘要： A method for detecting whether the stator in a vehicle alternator has a turn-to-turn short circuit. The method includes determining an output current or voltage signal of the alternator, where the output current or voltage signal includes a ripple current frequency as a result of an AC-to-DC conversion. The method determines the speed of the alternator and a current output of the alternator. The method then determines the ripple current frequency of the alternator from the alternator speed, and determines a winding frequency from the ripple current frequency. The method performs an FFT analysis on the voltage and current signal, determines an amplitude of the winding frequency and compares the amplitude of the winding frequency to a predetermined amplitude, where if the difference exceeds a predetermined threshold, a turn-to-turn short circuit is likely occurring.

摘要翻译： 一种用于检测车辆交流发电机中的定子是否具有匝间短路的方法。 该方法包括确定交流发电机的输出电流或电压信号，其中输出电流或电压信号包括作为AC到DC转换的结果的纹波电流频率。 该方法确定交流发电机的速度和交流发电机的电流输出。 然后，该方法从交流发电机速度确定交流发电机的纹波电流频率，并从纹波电流频率确定绕组频率。 该方法对电压和电流信号进行FFT分析，确定绕组频率的幅度，并将绕组频率的振幅与预定幅度进行比较，其中如果差超过预定阈值，则匝间短路 很可能发生。

公开(公告)号：US20120306422A1

公开(公告)日：2012-12-06

申请号：US13151568

申请日：2011-06-02

申请人： Lei Hao ,  Yilu Zhang ,  Siwei Cheng

发明人： Lei Hao ,  Yilu Zhang ,  Siwei Cheng

IPC分类号： G01R31/34

CPC分类号： H02P29/0055 ,  G01K7/22 ,  G01K2205/00 ,  G01K2217/00 ,  G01R31/343 ,  H02P29/028 ,  H02P29/032 ,  H02P29/64

摘要： A method for determining a temperature of an electric motor including stator windings includes injecting an AC current into a D-axis current of a stator winding at a frequency that is synchronized with a control frequency of the electric motor, determining a DC-phase current, determining a resistance of the stator winding corresponding to the DC-phase current and an applied voltage, and determining a temperature of the electric motor as a function of the resistance of the stator winding.

摘要翻译： 一种用于确定包括定子绕组的电动机的温度的方法包括以与电动机的控制频率同步的频率将AC电流注入到定子绕组的D轴电流中，确定DC相电流， 确定对应于DC相电流的定子绕组的电阻和施加的电压，以及根据定子绕组的电阻确定电动机的温度。

公开(公告)号：US20120259570A1

公开(公告)日：2012-10-11

申请号：US13083841

申请日：2011-04-11

申请人： Yilu Zhang ,  Siwei Cheng ,  Mutasim A. Salman

发明人： Yilu Zhang ,  Siwei Cheng ,  Mutasim A. Salman

IPC分类号： G06F19/00 ,  G01P3/46

CPC分类号： H02J7/1415 ,  B60W10/08 ,  B60Y2400/303 ,  B60Y2400/3086 ,  G01P3/44 ,  H02J7/1461

摘要： A system and method for determining the speed of an alternator, for example, a vehicle alternator. The method includes measuring the current or voltage of a vehicle battery for a predetermined period of time, and then notch filtering the measured current or voltage signal to remove known harmonics. A limited data point Fast Fourier Transform (FFT) spectrum analysis operation is performed to identify the frequency peaks in the filtered signal, where the highest peak represents a ripple current on the DC alternator signal. The highest peak in the FFT signal is identified, and an interpolation process is performed between that peak and an adjacent peak in the data to identify the actual frequency of the ripple current. The ripple current is then converted to the speed of the alternator.

摘要翻译： 用于确定交流发电机的速度的系统和方法，例如车辆交流发电机。 该方法包括在预定时间段内测量车辆电池的电流或电压，然后对所测量的电流或电压信号进行陷波滤波以去除已知的谐波。 执行有限数据点快速傅里叶变换（FFT）频谱分析操作，以识别滤波信号中的频率峰值，其中最高峰值表示DC交流发电机信号上的纹波电流。 识别FFT信号中的最高峰，并且在数据中的该峰值和相邻峰值之间进行插值处理，以识别纹波电流的实际频率。 然后将纹波电流转换为交流发电机的速度。