公开(公告)号：US10168375B2

公开(公告)日：2019-01-01

申请号：US15308696

申请日：2015-07-01

Applicant: China University of Mining and Technology

Inventor： Hao Chen ,  Xing Wang ,  Shengquan Wang

IPC: G01R31/34 ,  G01R31/02 ,  G01R31/42

Abstract: A phase current integration method for diagnosing a fault in a switched reluctance motor power converter determines whether the main switch of a switched reluctance motor power converter is experiencing a short circuit or an open circuit fault by measuring a phase current io(t) transient value of said converter in a non-fault state as well as a present phase current i(t) transient value of said converter, so as to obtain, by an integration operation, an integration value SnO of a phase current during a certain period under the non-fault state, and an integration value Sn of a phase current during a certain period under a present state, the ratio En of the two values indicating a fault characteristic value.

公开(公告)号：US10164560B2

公开(公告)日：2018-12-25

申请号：US14762298

申请日：2013-04-19

Applicant: China University of Mining and Technology

Inventor： Hao Chen ,  Yan Liang

IPC: H02P25/08 ,  G06F17/50

Abstract: A method for creating a switch reluctance motor memory sensor model. A switch reluctance motor memory sensor circuit model is formed by two current transmitters AD844, an operational amplifier AD826, a memristor, a capacitor, and three resistors. The method for creating a switch reluctance motor memory sensor model enables physical phenomena in a simulation system to be similar to an actual switch reluctance motor system, and is beneficial for direct mathematical simulation of a switch reluctance motor system. The method is simple, can improve static and dynamic performance of a system, and achieves real-time simulation and real-time control of the switch reluctance motor system.

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：US20160161561A1

公开(公告)日：2016-06-09

申请号：US14906412

申请日：2014-08-22

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Hao Chen ,  Xing Wang ,  Yuxiang Chen ,  Huan Yang

IPC: G01R31/34

CPC classification number: G01R31/34

Abstract: A quantitative evaluation method for the reliability of a Markov model switch reluctance motor system. The method comprises: solving a probability matrix P′T(t) of a switch reluctance motor system being in any survival state at any time t via a state conversion diagram of the switch reluctance motor system; calculating the sum of various elements of the probability matrix P′T(t) of the survival state, so that a reliability function R(t) is obtained; and thus calculating the average working time of the switch reluctance motor system before failure, thereby realizing the quantitative evaluation of the switch reluctance motor system and satisfying the requirements for the reliability analysis of a switch reluctance motor drive system. This disclosure has a good engineering application value.

Abstract translation: 马可夫模型开关磁阻电机系统的可靠性定量评估方法。 该方法包括：通过开关磁阻电机系统的状态转换图，求解任何时刻t处于任何生存状态的开关磁阻电动机系统的概率矩阵P'T（t）; 计算生存状态的概率矩阵P'T（t）的各元素的和，从而获得可靠性函数R（t）; 从而计算故障前开关磁阻电机系统的平均工作时间，实现开关磁阻电机系统的定量评估，满足开关磁阻电机驱动系统的可靠性分析要求。 本公开具有良好的工程应用价值。

公开(公告)号：US09316682B1

公开(公告)日：2016-04-19

申请号：US14351528

申请日：2013-04-19

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Hao Chen ,  Xing Wang

IPC: G01R31/00 ,  G01R31/26 ,  G01R31/40 ,  G01R31/34

CPC classification number: G01R31/2632 ,  G01R31/024 ,  G01R31/34 ,  G01R31/40 ,  G01R31/42 ,  G01R31/44

Abstract: A fault diagnosis method for freewheeling diodes of power converter of switched reluctance motor with two main switches per phase, in which two current sensors are arranged on a power converter with two main switches per phase, wherein, one current sensor LEM1 detects the total current of the main switches connected to the DC bus, and the other current sensor LEM2 detects the total feedback current of the freewheeling diodes connected to the DC bus. By controlling ON/OFF of the upper and lower main switch tubes, short circuit fault of the upper freewheeling diode, short circuit fault of the lower freewheeling diode, short circuit fault of both the upper freewheeling diode and the lower freewheeling diode, open circuit fault of the upper freewheeling diode, open circuit fault of the lower freewheeling diode, or open circuit fault of both the upper freewheeling diode and the lower freewheeling diode can be determined.

Abstract translation: 一种具有每相两个主开关的开关磁阻电动机功率转换器续流二极管的故障诊断方法，其中两个电流传感器布置在每相具有两个主开关的功率转换器上，其中一个电流传感器LEM1检测总电流 主开关连接到直流总线，另一个电流传感器LEM2检测连接到直流总线的续流二极管的总反馈电流。 通过控制上，下主开关管的ON / OFF，上续流二极管的短路故障，下续流二极管的短路故障，上续流二极管和下续流二极管的短路故障，开路故障 的上续流二极管，下续流二极管的开路故障或上续流二极管和下续流二极管的开路故障。

公开(公告)号：US10393811B2

公开(公告)日：2019-08-27

申请号：US14906412

申请日：2014-08-22

Applicant: China University of Mining and Technology

Inventor： Hao Chen ,  Xing Wang ,  Yuxiang Chen ,  Huan Yang

IPC: G01R31/34

Abstract: A quantitative evaluation method for the reliability of a Markov model switched reluctance motor system. The method comprises: solving a probability matrix P′T(t) of a switched reluctance motor system being in any survival state at any time t via a state conversion diagram of the switched reluctance motor system; calculating the sum of various elements of the probability matrix P′T(t) of the survival state, so that a reliability function R(t) is obtained; and thus calculating the average working time of the switched reluctance motor system before failure, thereby realizing the quantitative evaluation of the switched reluctance motor system and satisfying the requirements for the reliability analysis of a switched reluctance motor drive system. This disclosure has a good engineering application value.

公开(公告)号：US09906182B2

公开(公告)日：2018-02-27

申请号：US15308818

申请日：2015-08-19

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Hao Chen ,  Jiaotong Shi

IPC: H02P25/098 ,  H02P6/10

CPC classification number: H02P25/098 ,  H02P6/10

Abstract: A three-phase switched reluctance motor torque ripple two-level suppression method. A first set of torque thresholds at rotor position interval [0°, θr/3]. A second set of torque thresholds at rotor position interval [θr/3, θr/2]. Power is supplied for excitation. The power supplied for excitation to phase A leads the power supplied for excitation to phase B by θr/3. Phase A is turned off, while phase B is turned on. An entire commutation process from phase A to phase B is divided. In rotor position interval [0°, θ1], phase A uses the second set of torque thresholds while phase B uses the first set. Critical position θ1 automatically appears in the commutation process. Total torque is controlled. In rotor position interval [θ1, θr/3], phase A uses the second set of torque thresholds, phase B uses the first set, and the total torque is controlled, suppressing torque ripples of a three-phase switched reluctance motor.

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：US20170222590A1

公开(公告)日：2017-08-03

申请号：US15308818

申请日：2015-08-19

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Hao Chen ,  Jiaotong Shi

IPC: H02P25/098 ,  H02P6/10

CPC classification number: H02P25/098 ,  H02P6/10

Abstract: A three-phase switched reluctance motor torque ripple two-level suppression method is disclosed. A first set of torque thresholds is set in rotor position interval [0°, θr/3]. A second set of torque thresholds is set in rotor position interval [θr/3, 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/3. Phase A is turned off while phase B is turned on. 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/3], 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 three-phase switched reluctance motor.