公开(公告)号：US11325477B2

公开(公告)日：2022-05-10

申请号：US16764974

申请日：2018-11-08

申请人： ZHUZHOU CRRC TIMES ELECTRIC CO., LTD

发明人： Wenye Yuan ,  Xinjian Chen ,  Chaolu Chen ,  Lujun Zhang ,  Yong Liu ,  Lingjun Hu

IPC分类号： B60L7/14 ,  H02P3/18 ,  H02P27/06 ,  B60L1/00 ,  B60L53/20 ,  B60L55/00 ,  B60L7/22 ,  B60L7/16 ,  B60L50/60

摘要： An electrical brake energy feedback system, including a rectifier and inverter circuit, an intermediate DC circuit, a first voltage detection circuit configured to detect voltages of positive and negative terminals of the intermediate DC circuit to obtain a first voltage signal, a bidirectional DC/DC conversion circuit and/or a regeneration control circuit, and an electrical energy flow control circuit for controlling operating states of the bidirectional DC/DC conversion circuit and/or the regeneration control circuit according to the first voltage signal. With this system, the electrical brake energy can be recovered to the greatest extent when the vehicle is running in different zones, and the electrical brake energy consumed by the brake resistor is as little as possible. Accordingly, the vehicle and the entire transportation system can be more energy-saving and environmentally friendly.

公开(公告)号：US11898932B2

公开(公告)日：2024-02-13

申请号：US17261886

申请日：2019-09-03

申请人： ZHUZHOU CRRC TIMES ELECTRIC CO., LTD.

发明人： Wenlong Zhu ,  Yong Liu ,  Jisheng Dai ,  Zongshuai Li ,  Jiawei Yang ,  Ping Jiang ,  Yanhao Zhan ,  Zhongjing Zhang ,  Hailong Xu

IPC分类号： G01R19/00 ,  G01M13/045 ,  G01R23/16 ,  G01R31/34 ,  G06F18/214

CPC分类号： G01M13/045 ,  G01R19/0092 ,  G01R23/16 ,  G01R31/34 ,  G06F18/2148 ,  G06F2218/02 ,  G06F2218/10 ,  G06F2218/12

摘要： A device for diagnosing a fault in a bearing of a motor is provided. If the device operates in a fault diagnosis mode, a current signal acquisition unit acquires a real-time current signal of the motor, a residual signal acquisition unit extracts harmonic signals from the real-time current signal of the motor acquired by the current signal acquisition unit and remove a fundamental signal and a harmonic signal from the real-time current signal of the motor to acquire a residual signal, a fault feature extraction unit analyzes the residual signal in both time domain and frequency domain to extract a fault feature index of the bearing, and a fault diagnosis model unit performs, by using a bearing fault diagnosis model obtained through training, pattern recognition on the fault feature index to diagnose a fault state of the bearing.