Patents by Inventor Qunzhan Li

Qunzhan Li has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11897345
    Abstract: The present invention provides a three-phase power supply and collection device for a maglev train. A cross beam is arranged at the middle part of the bogie of the maglev train, and the lower surface of the cross beam is provided with three sets of longitudinal bearing seats, and three insulating bushes, three collector shoes and three power supply rails corresponding to the longitudinal bearing seats; the two ends of the horizontal part of each insulating bush is a rotating shaft structure, and the vertical part of the insulating bush is a hollow tubular structure; the upper part of each collector shoe is the shoe handle, the lower part is the shoe body, and the bottom of the shoe body is in a concave semicircular shape; the top surface of each power supply rail is in a convex semicircular shape.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: February 13, 2024
    Assignee: SOUTHWEST JIAOTONG UNIVERSITY
    Inventors: Qunzhan Li, Jiqin Wu
  • Publication number: 20230202234
    Abstract: The present disclosure provides a composite powered wheel set, a train, a wheel-rail system and a train control method. The composite powered wheel set comprises two booster wheels and two support wheels mounted on a driving axle. The booster wheels are fixedly mounted on two ends of the driving axle, the support wheels are mounted on the driving axle via bearings, the moving axle is connected to a first transmission device, which is connected to a first power mechanism, and the driving axle is further connected to a train bogie via a connecting device. Booster wheels and booster rails are provided to improve anti-skid performance, so the train will not skid when running on a steep slope or under a heavy traction load. Restrictions on the railway slope, train traction load, and train speed are eliminated to a great extent, and the application scope of the wheel rails is expanded.
    Type: Application
    Filed: April 29, 2021
    Publication date: June 29, 2023
    Applicant: SOUTHWEST JIAOTONG UNIVERSITY
    Inventor: Qunzhan LI
  • Publication number: 20220089033
    Abstract: The present invention relates to the technical field of train power supply and operation control, and provides a three-rail power supply control system for an electrical railway train. Power supply rails in the system are divided into a first power supply rail, a second power supply rail, and a third power supply rail, wherein the first power supply rail, the second power supply rail, and a running rail constitute a three-phase AC power supply loop, and the third power supply rail and the running rail constitute a DC power supply loop. An AC-DC-AC variable voltage variable frequency device supplies power to a train traction motor by means of the three-phase AC power supply loop and current collectors. Frequency modulation and voltage regulation power supply is conducted by means of the AC-DC-AC variable voltage variable frequency device on the ground to achieve train driving and operation control.
    Type: Application
    Filed: June 27, 2019
    Publication date: March 24, 2022
    Inventors: Qunzhan LI, Kai GUO, Shaofeng XIE, Zihan LI, Xiaohong HUANG, Yuhua GUO, Shuqian LI, Bo WU
  • Patent number: 11110959
    Abstract: A trackless train is formed of a locomotive hinged to carriages of N trailers. A controller is provided at the locomotive, wherein an input end of the controller is connected to an output end of a clock, an odometer and the steering angle meter, and an output end of the controller is connected to an input end of the steering mechanism of each one of the trailers via an optical network. The controller can fully describe and control a travelling track of the trackless train, such that the steered wheels of the trailer carriages and the steering drive wheels of the locomotives maintain the same track during travel.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: September 7, 2021
    Assignees: SOUTHWEST JIAOTONG UNIVERSITY
    Inventor: Qunzhan Li
  • Patent number: 11065983
    Abstract: A railway transportation power supply construction comprising a power supply rail and a return current rail respectively secured on two sides of an insulating base and isolated by the insulating base. A power supply arm and a return current arm are mounted to a bogie of a vehicle and insulated from the vehicle body by means of insulation rings, the bogie provided with a drive mechanism. The power supply arm has a front end connected to one end of an input port of the drive mechanism, and a terminal end in contact with the power supply rail. The return current arm has a front end connected to the other end of the input port of the drive mechanism, and a terminal end in contact with the return current rail.
    Type: Grant
    Filed: April 6, 2017
    Date of Patent: July 20, 2021
    Assignees: SOUTHWEST JIAOTONG UNIVERSITY
    Inventor: Qunzhan Li
  • Publication number: 20210129707
    Abstract: The present invention provides a three-phase power supply and collection device for a maglev train. A cross beam is arranged at the middle part of the bogie of the maglev train, and the lower surface of the cross beam is provided with three sets of longitudinal bearing seats, and three insulating bushes, three collector shoes and three power supply rails corresponding to the longitudinal bearing seats; the two ends of the horizontal part of each insulating bush is a rotating shaft structure, and the vertical part of the insulating bush is a hollow tubular structure; the upper part of each collector shoe is the shoe handle, the lower part is the shoe body, and the bottom of the shoe body is in a concave semicircular shape; the top surface of each power supply rail is in a convex semicircular shape.
    Type: Application
    Filed: June 21, 2019
    Publication date: May 6, 2021
    Inventors: Qunzhan LI, Jiqin WU
  • Publication number: 20200139848
    Abstract: A railway transportation power supply construction comprising a power supply rail and a return current rail respectively secured on two sides of an insulating base and isolated by the insulating base. A power supply arm and a return current arm are mounted to a bogie of a vehicle and insulated from the vehicle body by means of insulation rings, the bogie provided with a drive mechanism. The power supply arm has a front end connected to one end of an input port of the drive mechanism, and a terminal end in contact with the power supply rail. The return current arm has a front end connected to the other end of the input port of the drive mechanism, and a terminal end in contact with the return current rail.
    Type: Application
    Filed: April 6, 2017
    Publication date: May 7, 2020
    Applicants: Southwest Jiaotong University
    Inventor: Qunzhan Li
  • Publication number: 20190106150
    Abstract: A trackless train comprising a locomotive and carriages of N trailers is disclosed. The locomotive comprising an axle for a pair of steering drive wheels, controlled by a driver through a bogie, which comprises an angle sensor connected to an input end of a steering angle meter. The kth carriage comprises a steering wheel having a steering mechanism, controlling the steering angle of the steering wheel. The controller comprising an input end connected to an output end of a clock, an odometer and the steering angle meter, and an output end connected to an input end of the steering mechanism of the trailers via an optical network. The controller records time (from clock), mileage (from odometer) and steering angle of the steering drive wheels (steering angle meter), and describes/controls a travelling track of the train, such that the steering wheels of the carriages and the locomotive maintain the same track.
    Type: Application
    Filed: April 11, 2017
    Publication date: April 11, 2019
    Applicants: Southwest Jiaotong University
    Inventor: Qunzhan Li