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：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。