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：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：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：US09823307B2

公开(公告)日：2017-11-21

申请号：US14430381

申请日：2013-04-19

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Hao Chen ,  Xing Wang

IPC: G01R31/34 ,  G01R31/42

CPC classification number: G01R31/34 ,  G01R31/42

Abstract: A node energy diagnosis method for a fault of a switched reluctance motor double-switch power converter. By detecting a transient value of a phase current of a switched reluctance motor double-switch power converter, a node energy standard deviation σ is calculated to be used as a fault characteristic quantity, and a main switch lower-tube short-circuit fault of the switched reluctance motor double-switch power converter is diagnosed by adopting a node energy standard deviation σ curve of the phase current of the switched reluctance motor double-switch power converter in the whole rotation speed range. It also can be applied in fault diagnosis when a main switch lower-tube short-circuit fault occurs in two phases or more than two phases of a switched reluctance motor double-switch power converter. It is applicable to switched reluctance motor power converters with various phase numbers and a double-switch structure, is durable, reliable in fault diagnosis and good in effect, and has good practicability, and wide application prospect.

公开(公告)号：US09923496B2

公开(公告)日：2018-03-20

申请号：US15533878

申请日：2015-08-20

Applicant: China University of Mining and Technology

Inventor： Hao Chen ,  Guoqiang Han ,  He Cheng ,  Qianlong Wang ,  Qing Wang ,  Xing Wang

IPC: H02P25/08 ,  H02P6/16

CPC classification number: H02P6/16 ,  H02P25/086

Abstract: A fault-tolerant control method for a position sensor of a switched reluctance motor, if the position sensor of the switched reluctance motor runs without a fault, detecting, in real time, four equal-interval or equal-angle continuous edge pulses of an output signal of the position sensor, the fourth edge pulse being the current edge pulse, and detecting time intervals (T1, T2, T3) between each two adjacent edge pulses sequentially, thereby calculating a time interval (T4) between the current edge pulse and a next edge pulse following the current edge pulse. If the position sensor of the switched reluctance motor fails, and the next edge pulse following the current edge pulse is lost, reconstructing the next edge pulse after the interval time (T4) of the current edge pulse of the output signal of the position sensor. The method can be used, when one or more position sensors of a rotatory and linear switched reluctance motor having various phases and various topology structures fail, to reconstruct an edge pulse after lost.

公开(公告)号：US09871476B2

公开(公告)日：2018-01-16

申请号：US15521799

申请日：2015-11-30

Applicant: China University of Mining and Technology

Inventor： Hao Chen ,  He Cheng ,  Zhou Yang ,  Qing Wang ,  Qianlong Wang ,  Xing Wang

IPC: H02P25/08 ,  H02P6/24 ,  G05B19/416 ,  H02P25/086 ,  H02P21/36 ,  H02P21/20

CPC classification number: H02P6/24 ,  G05B19/416 ,  G05B2219/37312 ,  H02P21/20 ,  H02P21/36 ,  H02P25/08 ,  H02P25/086

Abstract: A braking torque closed-loop control system and method for a switch reluctance motor. The closed-loop control system comprises a torque regulator, a mode selector, a current regulator, an angle optimization controller and a torque estimator. On the basis of the rotating speed of the motor, the mode selector implements a phase current soft chopper control in a low rotating speed region and an angle position control in a high rotating speed region. The current regulator performs soft chopper hysteretic current regulation. The angle optimization controller optimizes a turn-on angle and a turn-off angle of a power converter master switch to reduce torque pulsation and improve braking energy feedback efficiency. The torque estimator conducts an on-line estimation of an actual braking torque estimated value of the motor based on an actual phase voltage and current of the motor to achieve braking torque signal feedback.

公开(公告)号：US20160274167A1

公开(公告)日：2016-09-22

申请号：US15029545

申请日：2014-04-14

Applicant: China University of Mining and Technology

Inventor： Hao Chen ,  Xing Wang ,  Shengquan Wang

IPC: G01R31/02 ,  H02P25/092 ,  H02P29/024 ,  G01R31/42

CPC classification number: G01R31/025 ,  G01R31/343 ,  G01R31/42 ,  H02P25/092 ,  H02P29/024 ,  H02P29/0241

Abstract: A bus current-based short circuit fault diagnosing method for the power converter of a switched reluctance motor, which, by detecting the transient value of bus current in the power converter of a switched reluctance motor, calculates the mean value Δ of maximum wavelet transform coefficient corresponding to bus current under different scale parameters and takes the mean value as a fault characteristic quantity, and utilizes a curve of mean value Δ of maximum wavelet transform coefficient corresponding to bus current in the power converter of the switched reluctance motor under different scale parameters in the entire range of rotation speed to diagnose whether there is a short circuit fault in the position main switches of the power converter of the switched reluctance motor. The method is applicable to the diagnosis of short circuit faults in position main switches of the power converter of a switched reluctance motor in any topological structure with any number of phases, can diagnose short circuit faults accurately, and has a great value in engineering application.

Abstract translation: 一种开关磁阻电机功率转换器的总线电流短路故障诊断方法，通过检测开关磁阻电机功率转换器中总线电流的瞬态值，计算最大小波变换系数的平均值Δ 对应于不同规模参数下的总线电流，将平均值作为故障特征量，并利用不同规模参数下开关磁阻电机功率转换器中总线电流的最大小波变换系数的平均值Δ曲线 整个旋转速度范围，用于诊断开关磁阻电机功率转换器的位置主开关是否存在短路故障。 该方法适用于开关磁阻电机功率转换器位置主开关的任意多相拓扑结构中的短路故障诊断，可准确诊断短路故障，在工程应用中具有重要价值。

公开(公告)号：US20160091556A1

公开(公告)日：2016-03-31

申请号：US14351528

申请日：2013-04-19

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Hao Chen ,  Xing Wang

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

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：US20150331050A1

公开(公告)日：2015-11-19

申请号：US14430381

申请日：2013-04-19

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Hao Chen ,  Xing Wang

IPC: G01R31/34

CPC classification number: G01R31/34 ,  G01R31/42

Abstract: A node energy diagnosis method for a fault of a switched reluctance motor double-switch power converter. By detecting a transient value of a phase current of a switched reluctance motor double-switch power converter, a node energy standard deviation σ is calculated to be used as a fault characteristic quantity, and a main switch lower-tube short-circuit fault of the switched reluctance motor double-switch power converter is diagnosed by adopting a node energy standard deviation σ curve of the phase current of the switched reluctance motor double-switch power converter in the whole rotation speed range. It also can be applied in fault diagnosis when a main switch lower-tube short-circuit fault occurs in two phases or more than two phases of a switched reluctance motor double-switch power converter. It is applicable to switched reluctance motor power converters with various phase numbers and a double-switch structure, is durable, reliable in fault diagnosis and good in effect, and has good practicability, and wide application prospect.

Abstract translation: 用于开关磁阻电动机双开关电源转换器故障的节点能量诊断方法。 通过检测开关磁阻电动机双开关功率转换器的相电流的瞬态值，节点能量标准偏差＆sgr; 被计算为故障特征量，开关磁阻电机双开关电源转换器的主开关下管短路故障采用节点能量标准偏差法进行诊断。 开关磁阻电机双开关电源转换器在整个转速范围内的相电流曲线。 当主开关下管短路故障发生在开关磁阻电机双开关电源转换器的两相或两相以上时，也可应用于故障诊断。 适用于具有各种相位数和双开关结构的开关磁阻电机功率转换器，耐用，故障诊断可靠，效果好，实用性好，应用前景广阔。