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公开(公告)号：US10661666B2
公开(公告)日：2020-05-26
申请号：US15580690
申请日：2016-06-28
发明人： Wenguang Chen , Jianghua Feng , Xiong Liu , Chaolu Chen , Hua Xiao , Junfeng Xu , Huishui Peng , Peijin Xie , Yuanji Lu , Wenye Yuan , Long Wang
摘要： 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.
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公开(公告)号：US20210139702A1
公开(公告)日：2021-05-13
申请号：US16910318
申请日：2020-06-24
发明人： Zhimin DANG , Dongli ZHANG , Wenqing MEI , Sijiao WANG , Qikun FENG , Qunxin LIU
IPC分类号： C08L83/04 , C08G77/08 , C08G77/12 , C08G77/20 , C08K3/38 , C08K9/06 , C08K3/04 , C08K3/36 , C08K7/06 , B01J31/28
摘要： The present invention discloses a liquid silicone rubber (LSR) and a preparation method thereof. The present invention comprises composition A and composition B at a weight ratio of (1:1) to (1:10), where composition A includes vinyl silicone oil, platinum catalyst, hexagonal boron nitride particles, and mechanical reinforcing agent, and composition B includes vinyl silicone oil, hydrogen-containing silicone oil, alkyne inhibitor, and hexagonal boron nitride particles. The LSR prepared by this method has excellent electrical insulation and thermal conductivity, exhibits a significant improvement in both thermal conductivity and electrical insulation, and has a breakdown strength of 42 kV/mm, and a thermal conductivity of 0.96 W·m−1·K−1 that increases by 557% compared to that of a pure LSR.
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公开(公告)号：US20240171108A1
公开(公告)日：2024-05-23
申请号：US18552030
申请日：2021-07-02
发明人： Yu QI , Wenqing MEI , Liangjie LIU , Zechun DOU , Xiong LIU , Yuecheng XIE , Bin LIU
CPC分类号： H02P27/06 , B60L7/14 , B61C9/38 , B60L2210/22 , B60L2220/54
摘要： There is provided an electric traction system, comprising: a step-down transformer comprising a primary winding for operatively coupling to an AC power supply and a secondary winding which is inductively coupled to the primary winding; a traction converter module comprising a first input terminal and a second input terminal which are operatively coupled to the secondary winding, and a plurality of AC-to-AC power converters, each of which comprises first and second input nodes, configured to receive AC power and output nodes configured to supply AC power, wherein the first and second input nodes, of the plurality of AC-to-AC power converters are electrically connected in series between the first input terminal and the second input terminal; and at least one electric motor configured to be driven by the traction converter module.
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公开(公告)号：US10257719B2
公开(公告)日：2019-04-09
申请号：US15299623
申请日：2016-10-21
发明人： Jianghua Feng , Yu Liu , Osvaldo Simeone , Jun Tang , Zheng Wen , Alexander M. Haimovich , MengChu Zhou
IPC分类号： H04W24/02 , H04W8/00 , H04L29/08 , H04L12/24 , H04L29/06 , H04W24/08 , H04L29/14 , H04L12/26
摘要： 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.
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公开(公告)号：US20180284181A1
公开(公告)日：2018-10-04
申请号：US15764999
申请日：2016-11-01
发明人： Wenye LIU , Jinfeng YANG , Jiaxi HU , Yanyong LI , Jianbo LUO , Hangjie FU
摘要： Disclosed are an on-line health management device and an on-line health management method for an insulated gate bipolar transistor. The device comprises: an electrothermal detection module, configured to detect a junction temperature and a temperature rise of the insulated gate bipolar transistor based on operating condition parameters of the insulated gate bipolar transistor in combination with a structure of the insulated gate bipolar transistor; a degradation detection module, configured to detect a performance degradation degree of the insulated gate bipolar transistor based on the operating condition parameters, the structure, the junction temperature and the temperature rise of the insulated gate bipolar transistor; and a lifetime detection module, configured to detect a consumed lifetime of the insulated gate bipolar transistor based on the performance degradation degree thereof.
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公开(公告)号：US20170271878A1
公开(公告)日：2017-09-21
申请号：US15528515
申请日：2015-10-29
发明人： Jianghua FENG , Fang JIAN , Qiang WU , Jijing GUO , Hengliang WU , Honghao ZHANG , Yifeng CHEN , Haiyan TANG , Nan WANG , Xianggui ZHAO , Zhaoyi LIU , Shaolong LI , Rong ZHANG
CPC分类号： H02J3/385 , H02J3/46 , H02M3/158 , H02S40/30 , H02S40/32 , H02S40/36 , H02S50/00 , H02S50/10 , Y02E10/58
摘要： A photovoltaic intelligent power supply, comprising a plurality of unit modules, and a communication unit (103) and a control unit (106), wherein all the unit modules are connected to the control unit (106) and the communication unit (103); each unit module comprises an input collection unit (101), a data acquisition unit (102), a boost unit (104), an arc isolation unit (105) and an anti-PID unit (107), wherein the input collection unit (101) is connected to a photovoltaic module; the data acquisition unit (102) is configured to acquire voltage and current state signals; the boost unit (104) is configured to perform interleaving chopping and operate in an MPPT mode; the arc isolation unit (105) is configured to receive instructions sent by the control unit (106) to execute opening and closing; and the anti-PID unit (107) is configured to receive instructions sent by the control unit (106) 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.
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公开(公告)号：US20170251382A1
公开(公告)日：2017-08-31
申请号：US15299623
申请日：2016-10-21
发明人： Jianghua FENG , Yu LIU , Osvaldo SIMEONE , Jun TANG , Zheng WEN , Alexander M. HAIMOVICH , MengChu ZHOU
CPC分类号： H04W24/02 , H04L41/12 , H04L43/16 , H04L67/12 , H04L69/22 , H04L69/40 , H04W8/005 , H04W24/08
摘要： 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.
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公开(公告)号：US20240313674A1
公开(公告)日：2024-09-19
申请号：US18575939
申请日：2021-07-02
发明人： Yu QI , Wenqing MEI , Liangjie LIU , Zechun DOU , Xiong LIU , Yuecheng XIE , Bin LIU
IPC分类号： H02P5/74
CPC分类号： H02P5/74
摘要： There is provided an electric traction system 1, comprising: a traction converter module 2 comprising: a positive input terminal 4 and a negative input terminal 6 for operatively coupling to a DC power supply, and a plurality of power inverters 11, each of which comprises positive and negative input nodes 3, 5 configured to receive DC power and output nodes 9 configured to supply AC power, wherein the positive and negative input nodes 3, 5 of the plurality of power inverters 11 are electrically connected in series between the positive input terminal 4 and the negative input terminal 6; and at least one electric motor 8 configured to be driven by the traction converter module 2, the at least one electric motor 8 comprising a multi-phase electric motor 81.
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公开(公告)号：US10263556B2
公开(公告)日：2019-04-16
申请号：US15765251
申请日：2016-07-22
发明人： Jianghua Feng , Junfeng Xu , Yuliang Wen , Jing Shang , Jiade Huang , Xiaofan Zeng , Zhaoyang Zhang , Hanfeng Zheng , Xiong Liu , Yaping He
摘要： 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 θ1 based on the counter electromotive forces; acquiring a rotation angle θ2 measured by the resolver; calculating an installation deviation Δθ corresponding to the space vector phase angle θ1 and the rotation angle θ2; and adjusting a position of the resolver until the installation deviation Δθ meets a precision requirement.
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公开(公告)号：US20180302014A1
公开(公告)日：2018-10-18
申请号：US15765251
申请日：2016-07-22
发明人： Jianghua FENG , Junfeng XU , Yuliang WEN , Jing SHANG , Jiade HUANG , Xiaofan ZENG , Zhaoyang ZHANG , Hanfeng ZHENG , Xiong LIU , Yaping HE
CPC分类号： H02P21/32 , H02P6/08 , H02P6/18 , H02P21/18 , H02P2203/03 , H02P2207/05
摘要： 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 θ1 based on the counter electromotive forces; acquiring a rotation angle θ2 measured by the resolver; calculating an installation deviation Δθ corresponding to the space vector phase angle θ1 and the rotation angle θ2; and adjusting a position of the resolver until the installation deviation Δθ meets a precision requirement.
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