Crrc Zhuzhou Electric Locomotive Research Institute Co., Ltd.

Crrc Zhuzhou Institute Co., Ltd.

New Jersey Institute of Technology

Csr Zhuzhou Electric Locomotive Research Institute Co., Ltd.

Zhuzhou Crrc Times Electric Co., Ltd

Jianghua Feng

Xiong Liu

Junfeng Xu

Jing Shang

Yuliang Wen

Yaping He

Chaoyang Zhang

Kean Liu

Gaohua Chen

Hanfeng Zheng

Lei Xiao

Mengchu Zhou

Jun Tang

Rongjun Ding

Tairan Zhang

Nirwan Ansari

Roberto Rojas-Cessa

Osvaldo Simeone

Alexander Mircea Haimovich

Chaolu Chen

Long Wang

Yong Liu

Wenqing Mei

Yonghui Nan

Qiang Wu

Wenguang Chen

Wenye Yuan

Guotao Jiang

Hua Xiao

Huishui Peng

Rong Zhang

Huadong Liu

Xianggui Zhao

Shaolong Li

Zhaoyi Liu

Qiang Fan

Jianghong Li

Benyu Xin

Kuisen Tian

Shuying Guo

Shu Cheng

Chaoqun Xiang

Liang Han

Yijing Xu

Haiyan Tang

Nan Wang

Mina Taheri

Dajun Wang

Peijin Xie

Yuanji Lu

Jiabo Xiao

Qinghua Quan

Qi Lu

Jiade Huang

Zhaoyang Zhang

Yu Liu

Zheng Wen

Fang Jian

Jijing Guo

Hengliang Wu

Honghao Zhang

Yifeng Chen

Xiaofan Zeng

Gang Fu

Jisheng Dai

Wenlong Zhu

Hailong Xu

Jingyu Hu

Zhixue Zhang

Xiwen Yuan

Xiaoguang Li

Jing Peng

Chenlin Zhang

Xiaoqing Jiang

Xiaocong Liu

Wenguang Luo

Zhibing Zhang

Shijie Hu

Yu Wang

Jie Li

Jia Wang

Fan Jiang

Huajia Bin

Qing Xu

Chong Yan

He Huang

Sen Zhang

Yan Xiong

Zhibo Chen

A method, a device and a system for safely and reliably performing real-time speed measurement and continuous positioning are provided. With the method, inertial navigation data from an inertial navigation signal source arranged in a train is detected, and correction data from a correction signal source is detected. In a case that no correction data is detected, a current speed and a current position of the train is determined based on the inertial navigation data, and in a case that the correction data is detected, the inertial navigation data is corrected with the correction data, and a current speed and position of the train are determined based on the corrected inertial navigation data. Therefore, even in the case that no correction data is detected, the real-time speed measurement and continuous positioning can be performed safely and reliably based on the inertial navigation data.

Safe and reliable method, device, and system for real-time speed measurement and continuous positioning

A long stator power supply section and a long stator linear motor for a maglev train, comprising a plurality of stator core modules () and stator coils () equal in number to the stator core modules (). Each stator of the plurality of stator coils () is correspondingly embedded into one stator core module of the stator core modules () respectively; joints are arranged at both ends of each stator coil (); the stator coils () on every two adjacent stator core modules () are detachably connected by means of the joints; and the joints of the stator coils () on the stator core modules () at both ends are connected to a feeder cable.

Long stator power supply section and long stator linear motor for maglev train

A method and a system for rail transit communication. The method includes: selecting a second target FSO transceiver from the FSO transceivers that are currently located within a signal coverage of a target FSO base station, in response to detecting that a first target free-space-optics (FSO) transceiver moves out of the signal coverage of the target FSO base station when data communication between the target FSO base station and the target user terminal is performed via the first target FSO transceiver, where the target FSO base station is one of the FSO base stations located on the rail; and maintaining the data communication between the target FSO base station and the target user terminal, by using the second target FSO transceiver. Handover among the base stations is reduced for user equipment, data communication rate is increased, and communication experience of passengers can be improved.

Rail transit communication method and system

A method for tractive force distribution for a power-distributed train is provided, which includes: determining a current motor car of a target train; acquiring parameter information of the current motor car; calculating, based on the parameter information, axle load transfer at four axles of the current motor car; calculating, based on the axle load transfer at the four axles of the current motor car, current axle loads on the four axles of the current motor car; and performing, based on the current axle loads on the four axles, distribution of tractive forces of the four axles of the current motor car using an electrical control compensation technology.

Traction distribution method and system of power-distributed train

An FSO communication system includes a laser, an optical detector and a first optical adjustment module and a controller. The laser is configured to emit an optical signal. The optical detector is configured to receive an optical signal from the first optical adjustment module. The controller is configured to obtain an optical power of an optical signal received by the optical detector; and generate a control command based on the optical power and transmit the control command. The first optical adjustment module is configured to: receive the control command and the optical signal emitted by the laser; adjust, in response to the control command, the optical signal emitted by the laser to cause the optical power of the optical signal received by the optical detector to be in a preset reasonable range; and transmit the adjusted optical signal to the optical detector.

FSO communication system

A rotor temperature monitoring method and system for a permanent magnet synchronous motor are provided. According to the method and system, an a-phase line current and a b-phase line current of a stator of a permanent magnet synchronous motor are obtained as a first line current and a second line current; further, a line voltage between the a-phase and the b-phase of the stator is obtained and a rotating speed of the rotor of the permanent magnet synchronous motor is obtained; and then, the first line current, the second line current, the line voltage, the rotating speed of the rotor, an inductance parameter of the permanent magnet synchronous motor and a temperature characteristic equation of a permanent magnet of the rotor are substituted into a preset rotor permanent magnet temperature expression to calculate and obtain the temperature of the rotor.

Rotor temperature monitoring method and system for permanent magnet synchronous motor

A method and a system for correcting an initial zero position deviation are provided, which is applied to a permanent magnet synchronous motor and a resolver. The method includes: driving a rotor of the permanent magnet synchronous motor to rotate at a constant speed; acquiring counter electromotive forces of a stator of the permanent magnet synchronous motor and a position of a rotor of the resolver; calculating a space vector phase angle &#x3b8;based on the counter electromotive forces; acquiring a rotation angle &#x3b8;measured by the resolver; calculating an installation deviation &#x394;&#x3b8; corresponding to the space vector phase angle &#x3b8;and the rotation angle &#x3b8;; and adjusting a position of the resolver until the installation deviation &#x394;&#x3b8; meets a precision requirement.

Method and system for correcting initial zero offset

Disclosed is a method for wireless typology discovery for train backbone networks. The method comprises steps of: receiving a data from a neighboring backbone node (BN), by a BN in a train backbone network through one directional antenna of at least one pair of directional antennas provided thereon; recording a receiving direction of said data, and determining said data to be a hello frame or a typology frame; performing neighbor discovery or topology discovery based on the type of said data; in neighbor discovery phase, performing a pair consistency check with respect to all the data received by the BN from a same direction, so as to identify a neighboring BN of the BN, and at the same time, stopping receiving hello frames from said direction by the BN; in typology discovery phase, updating a local typology table of the current BN based on the received typology frames; and performing a topology convergence check to see if any change occurs to the local typology table of the current BN, and if no change occurs, reporting on the status of the typology discovery phase to an up-level application.

Method and device for wireless topology discovery for train backbone networks

A photovoltaic intelligent power supply, comprising a plurality of unit modules, and a communication unit () and a control unit (), wherein all the unit modules are connected to the control unit () and the communication unit (); each unit module comprises an input collection unit (), a data acquisition unit (), a boost unit (), an arc isolation unit () and an anti-PID unit (), wherein the input collection unit () is connected to a photovoltaic module; the data acquisition unit () is configured to acquire voltage and current state signals; the boost unit () is configured to perform interleaving chopping and operate in an MPPT mode; the arc isolation unit () is configured to receive instructions sent by the control unit () to execute opening and closing; and the anti-PID unit () is configured to receive instructions sent by the control unit () so as to generate proper DC voltages to be applied between a negative electrode of a cell panel and the ground. The photovoltaic intelligent power supply supports MPPT control, and can effectively detect an arc and start protection, can ensure normal operation of an inverter, and improve reliability of a power generation system.

Photovoltaic intelligent power supply

A control method for restarting a permanent magnet synchronous motor (PMSM) in a rotating condition, and a device and a system thereof are provided. In the method, an electrical angular speed &#x3c9;of the PMSM is obtained based on a speed of a trailer to obtain a back electromotive force of the PMSM. The back electromotive force is compared with a voltage at a side of an inverter, and if the electromotive force of the permanent magnet synchronous motor is higher than the voltage at the side of the inverter, the restarting of the PMSM is forbidden, otherwise, the restarting of the PMSM is allowed. Therefore, in the present disclosure, the low-speed operating condition and the high-speed operating condition correspond to different position angles of the rotor, and the PMSM is started based on the position angle of the rotor.

Control method for restarting permanent magnet synchronous motor with speed, device and system thereof

A direct-axis current protection method and device for a permanent magnet synchronous motor drive system. The method includes: pre-calculating the direct-axis current of the next moment according to the current voltage transmitted from an inverter to a permanent magnet synchronous motor (PMSM); comparing the direct-axis current of the next moment with a maximum protection current; if the direct-axis current of the next moment is less than the maximum protection current, continuing transmitting the current voltage to the PMSM; if the direct axis current of the next moment is greater than or equal to the maximum protection current, redistributing the voltage according to a protection direct-axis current and a protection quadrature-axis current, and transmitting the redistributed voltage to the PMSM. The direct-axis current of the next moment is tended to be normal by adjusting the voltage.

Direct-axis current protection method and device for permanent magnet synchronous motor drive system

A method and device for acquiring a rotor position based on a permanent magnet synchronous drive system. The permanent magnet synchronous drive system includes an inverter and a permanent magnet synchronous motor, wherein the initial speed of the permanent magnet synchronous motor is not zero. The method includes: controlling a bridge arm switch of an inverter periodically; collecting a three-phase current of the permanent magnet synchronous motor at a fixed time within each control period; and after the three-phase current is reversed, sending same to a phase-locked loop system to conduct processing, so as to obtain a phase angle of an induction potential vector, and according to the phase angle of the induction potential vector, acquiring a rotor position angle of the permanent magnet synchronous motor.

Method and device for acquiring rotor position based on permanent magnet synchronous drive system

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Hunan, China

Jianghua Feng