公开(公告)号：US09787238B2

公开(公告)日：2017-10-10

申请号：US15124238

申请日：2015-08-19

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Hao Chen ,  Hui Zeng

IPC: H02P6/10 ,  H02P25/08 ,  H02P25/098 ,  H02P6/00 ,  H02P25/28

CPC classification number: H02P25/098 ,  H02P6/10

Abstract: A four-phase switched reluctance motor torque ripple three-level suppression method. A first set of torque thresholds is set in rotor position interval [0°, θr/4]. A second set of torque thresholds is set in rotor position interval [θr/4, θr/2]. Power is supplied to adjacent phase A and phase B for excitation. The power supplied for excitation to phase A leads the power supplied for excitation to phase B by θr/4. An entire commutation process from phase A to phase B is divided into two intervals. In rotor position interval [0°, θ1], phase A uses the second set of torque thresholds while phase B uses the first set of torque thresholds. Critical position θ1 automatically appears in the commutation process, thus obviating the need for additional calculations. Total torque is controlled between [Te+th2low and Te+th2up]. In rotor position interval [θ1, θr/4], phase A continues to use the second set of torque thresholds, phase B continues to use the first set of torque thresholds, and the total torque is controlled between [Te+th1low and Te+th1up]. This suppresses torque ripples of a four-phase switched reluctance motor and provides great engineering application values.

公开(公告)号：US09866166B2

公开(公告)日：2018-01-09

申请号：US15114052

申请日：2015-08-19

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Hao Chen ,  Hui Zeng

IPC: H02P25/098 ,  H02P25/089

CPC classification number: H02P25/098 ,  H02P25/089

Abstract: A four-phase switched reluctance motor torque ripple two-level suppression method in which power is supplied to adjacent phase A and phase B for excitation. The power supplied for excitation to phase A leads the power supplied for excitation to phase B by θr/4. An entire commutation process from phase A to phase B is divided into two intervals, phase A which uses the second set of torque thresholds while phase B uses the first set of torque thresholds. Critical position θ1 automatically appears in the commutation process, thus obviating the need for additional calculations. Total torque is controlled between [Te+th2low and Te+th2up]. In rotor position interval [θ1, θr/4], phase A continues to use the second set of torque thresholds, phase B continues to use the first set of torque thresholds, and the total torque is controlled between [Te+th1low and Te+th1up].

公开(公告)号：US20170272022A1

公开(公告)日：2017-09-21

申请号：US15114052

申请日：2015-08-19

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Hao Chen ,  Hui Zeng

IPC: H02P25/098 ,  H02P25/089

CPC classification number: H02P25/098 ,  H02P25/089

Abstract: A four-phase switched reluctance motor torque ripple two-level suppression method. A first set of torque thresholds is set in rotor position interval [0°, θr/4]. A second set of torque thresholds is set in rotor position interval [θr/4, θr/2]. Power is supplied to adjacent phase A and phase B for excitation. The power supplied for excitation to phase A leads the power supplied for excitation to phase B by θr/4. An entire commutation process from phase A to phase B is divided into two intervals. In rotor position interval [0°, θ1], phase A uses the second set of torque thresholds while phase B uses the first set of torque thresholds. Critical position θ1 automatically appears in the commutation process, thus obviating the need for additional calculations. Total torque is controlled between [Te+th2low and Te+th2up]. In rotor position interval [θ1, θr/4], phase A continues to use the second set of torque thresholds, phase B continues to use the first set of torque thresholds, and the total torque is controlled between [Te+th1low and Te+th1up]. This suppresses torque ripples of a four-phase switched reluctance motor and provides great engineering application values.

公开(公告)号：US09281773B2

公开(公告)日：2016-03-08

申请号：US14344872

申请日：2013-01-24

Applicant: China University of Mining and Technology

Inventor： Hao Chen ,  Hui Zeng

IPC: H02P25/08

CPC classification number: H02P25/083 ,  H02P25/089 ,  H02P25/092

Abstract: A position sensorless step-wise freewheeling control method for a switched reluctance motor having dual switched-mode power converters for each phase doesn't require any additional external hardware, any rotor-position sensor, or storage of flux linkage data of the motor. After the upper and lower tubes of the main switch are switched off, and the phase of the switched reluctance motor enters into a negative voltage forced freewheeling state, the phase current is detected. When the phase current falls to a preset threshold, one of the upper or lower tubes is switched on and the phase enters into a zero voltage natural freewheeling state. When the phase current reaches a peak value, the rotor position becomes the start position of the minimum phase inductance and the rotor position is used as the switch-on position of the main switch. The upper and lower tubes are then switched on.

Abstract translation: 具有用于每相的双开关电源转换器的开关磁阻电动机的无位置传感器逐步续流控制方法不需要任何附加的外部硬件，任何转子位置传感器或电动机的磁链数据的存储。 在主开关的上管和下管关闭后，开关磁阻电机的相位进入负电压强制续流状态，检测相电流。 当相电流下降到预设阈值时，上管或下管之一被接通，相位进入零电压自然续流状态。 当相电流达到峰值时，转子位置成为最小相电感的起始位置，转子位置用作主开关的接通位置。 然后打开上管和下管。

公开(公告)号：US20140340006A1

公开(公告)日：2014-11-20

申请号：US14344872

申请日：2013-01-24

Applicant: China University of Mining and Technology

Inventor： Hao Chen ,  Hui Zeng

IPC: H02P25/08

CPC classification number: H02P25/083 ,  H02P25/089 ,  H02P25/092

Abstract: A position sensorless step-wise freewheeling control method for a switched reluctance motor having dual switched-mode power converters for each phase doesn't require any additional external hardware, any rotor-position sensor, or storage of flux linkage data of the motor. After the upper and lower tubes of the main switch are switched off, and the phase of the switched reluctance motor enters into a negative voltage forced freewheeling state, the phase current is detected. When the phase current falls to a preset threshold, one of the upper or lower tubes is switched on and the phase enters into a zero voltage natural freewheeling state. When the phase current reaches a peak value, the rotor position becomes the start position of the minimum phase inductance and the rotor position is used as the switch-on position of the main switch. The upper and lower tubes are then switched on.

Abstract translation: 具有用于每相的双开关电源转换器的开关磁阻电动机的无位置传感器逐步续流控制方法不需要任何附加的外部硬件，任何转子位置传感器或电动机的磁链数据的存储。 在主开关的上管和下管关闭后，开关磁阻电机的相位进入负电压强制续流状态，检测相电流。 当相电流下降到预设阈值时，上管或下管之一被接通，相位进入零电压自然续流状态。 当相电流达到峰值时，转子位置成为最小相电感的起始位置，转子位置用作主开关的接通位置。 然后打开上管和下管。