1861 results about "Maglev" patented technology

A system for switching a transport vehicle comprising: a guideway, a vehicle that moves along the guideway, and a magnetic field source that creates a force on the vehicle to affect motion in a desired direction at a switch. Once the vehicle has started motion through the switch the guidance can be continued by use of permanent magnets until the normal guidance system is effective. The switching scheme can work with any suspension scheme, including wheels and maglev, and can work with any lateral guidance scheme, including horizontal guide wheels and magnetic guidance. The system can be used with very closely spaced vehicles, such as with Personal Rapid Transit, material handling, and elevators with multiple cabs in the same shaft.

A High Temperature Superconductor Maglev (HTSM) for Evacuated Tube Transport (ETT) with a magnetic levitation structure for ETT capsule vehicles traveling in an evacuated tube. At least one ETT capsule travels within an evacuated tube, an upper and a lower cryostat respectively mount at the top and bottom of said ETT capsule along the length thereof, at least a plurality of superconductor levitation force elements divided between said upper and lower cryostats. The levitation force being spread over the length of capsule, however substantially concentrated in a compact cross-sectional area. At least a pair of permanent magnetic elements mounted at the top and bottom of the evacuated tube to levitate the capsule. At least a pair of capsule based switchable diverge force elements cooperate with at least a pair of tube based diverge force elements to steer the capsule while in an interchange.

The invention provides a vacuum pipeline docking technology and a high-speed permanent maglev train system. With the station-training docking technology, the door closing time of the maglev train inside the vacuum pipeline can be shortened for scores of seconds, so the rapid on-off can be realized. When a telescopic door and a separation cabin door are withdrawn to be close to the wall of the vacuum pipeline, the high-speed pass of the tray is free from being influenced. The telescopic door is locked by a permanent magnet suction disc, and the locking force is free from being controlled by the electric power, so the gas leakage and pressure relief caused by the invalid locking for sudden power down can be prevented. The energy can be remarkably saved, the energy can be saved by more than 97 percent compared with that of high-speed track train, and the energy can be saved by more than 99 percent compared with that of the airplane.

The present invention relates to a novel magnetic suspension and propulsion technologies, which are named as Magnetostatic Suspension (MSS) and Magnetostatic Propulsion (MSP) respectively because of their magnetostatic nature of forces generated. A spring-like magnetic force is produced through interactions between magnets and ferrous materials such as steel. To apply the technologies, four key embodiments of the invention have been invented and described: a MSS and MSP maglev vehicle system in which a vehicle body is lifted up and stabilized by magnetostatic forces above a steel rail both horizontally and vertically; a MSP long-stator linear motor system in which a rotor can be driven up along a magnet-free steel rail or long steel stator; a MSS Permanent Magnet Magnetic Bearing System (PMMB) system in which a steel shaft is levitated standstill by a fully permanent magnets assembly for frictionless rotating; a MSS maglev wind turbine system in which a magnet-free turbine body can hover standstill over a permanent magnet base assembly spinning frictionlessly with low inertia and low cut-in wind speed threshold.

The invention discloses an integrated grounding system for a medium-and-low-speed maglev train. The integrated grounding system comprises a power supply system grounding protection device, a safety grounding protection device and an electric leakage detection device, wherein the power supply system grounding protection device is arranged in a transformer substation, and the safety grounding protection device and the electric leakage detection device are mounted on the train. The electric leakage detection device is grounded through the safety grounding protection device. The integrated grounding system further comprises an induced current filter device. The induced current filter device is arranged between the train and a negative-electrode contact rail of a contact rail transmitting power and is used for receiving induced current generated during running of the train and outputting the induced current to the negative-electrode contact rail so as to filter induced current in the train. Induced current generated by a direct-current motor during running of the train can be filtered, and accordingly, interference on electronic equipment such as the maglev train system, the signal system and the running control system from the induced current of the direct-current motor is eliminated. Besides, the integrated grounding system has the advantages of simple structure, low cost, low electromagnetic interference, safety, reliability and the like.

The invention discloses a high-precision speed measurement positioning method and a high-precision speed measurement positioning system for medium and low-speed maglev trains. The method comprises the following steps of: spreading metal tooth groove bars on a running track of the train, and arranging over two speed measurement positioning sensors on a train body; and cooperatively generating detection signals when the train runs and the speed measurement positioning sensors are close to the metal tooth groove bars, and judging the speed, relative position and direction of the vehicle body according to the detection signals. The system comprises the metal tooth groove bars fixed on the track, the over two speed measurement positioning sensors arranged on the train body and a signal processing unit; when the speed measurement positioning sensors are close to the metal tooth groove bars, periodic sinusoidal signals and periodic on-off signals are cooperatively generated and output to the signal processing unit; and the signal processing unit judges the speed and the position of the train body according to the received sinusoidal signals and the received on-off signals. The system has the advantages of simple and compact structure, low cost, high measurement precision, convenient installation, strong anti-jamming capability and the like.

A suspension maglev rail transit system includes an orbital system, a suspension system, a control system and a car system, wherein the control system comprises a drive system, a guidance system and asuspension control system, wherein the track system is suspended in the air through upright posts, the car system is suspended vertically below the track system through the suspension system, and thedrive system and the guidance system cooperate to drive the car system to operate in the track system. The invention utilizes the levitation force with the permanent magnet repulsion force as the main force and the electromagnetic regulation as the auxiliary force to suspend the car on the air track, and realizes the stable operation through the non-contact traction of the linear motor. The invention has the advantages of low energy consumption, high safety, no land occupation, low cost, strong climbing ability, small turning radius and wide adaptability.

The invention provides a method for inhibiting the track coupled vibration of a suspension system of a magnetic suspension train; the method is as follows: bringing the characteristics of a magnetic track into the magnetic suspension train system to lead to a five-level system of the magnetic suspension train system; acquiring five independent state variables which represent the suspension train and track states; comprehensively controlling the magnetic suspension system according to the five state variables and adjusting the control variables of the system; controlling the suspension clearance of the magnetic suspension train in a certain range; inhibiting the coupled vibration of the track of the suspension system of the magnetic suspension train and realizing the stable suspension of the magnetic suspension train. The invention further provides a suspension control unit formed by a suspension magnet, a suspension sensor, a suspension controller, a differentiator and the like, and the suspension control unit is used as an execution element in the control. The method not only inhibits the coupled vibration of the track of the suspension system of the magnetic suspension train, but also effectively solves the problem of noise amplification in the ordinary differential method.

The invention discloses a track component for a maglev train. The track component comprises a track, a bogie arranged on a maglev train body, a traction module, and levitation guide modules arranged on two sides of the track. The traction module is disposed in the middle of the track and comprises array structured permanent magnets in corresponding arrangement and a long stator coil; power supply is controlled for the long stator coil via the ground; the array structured permanent magnets are mounted on the bogie; the long stator coil is mounted on the track; the long stator coil and the array structured permanent magnets interact to produce tractive force for the maglev train. The track component has the advantages that utilization rate of energy resources is increased, energy consumption is lowered and vehicular equipment is simplified.

The invention provides an external thin-wall vacuum duct maglev traffic system of a power system. A vacuum duct with small wall thickness is adopted, a linear motor coil, a track levitation mechanism and other communication, detecting and control devices are arranged outside the duct and provide power, levitation force and control to vehicles in the duct in the state that one thin duct wall is used for separation. The material of the duct wall is required to have no effect on the electromagnetic field of a linear motor and the levitation magnetic field of a levitation device, for example, non-magnetized stainless steel, carbon alloy, glass fiber reinforced plastics or high-strength organic materials are adopted, or the duct is made of a composite material. The arrangement has the advantages that the installation construction of a linear motor stator and the levitation mechanism can be conveniently performed outside the duct; routine maintenance and repair during operation can also be performed outside the duct; mechatronic systems can be well cooled, and heat aggregation in the vacuum duct is avoided; and the space in the duct is not occupied; and the construction, maintenance and system operation costs of the vacuum duct high-speed maglev traffic system can be lowered.

This invention relates to three-level switch power amplifier belonging to voltage to current switch power amplifier, which comprises Signal mixture process circuit, impulse modulation circuit, protective and light coupling drive circuit and the voltage signal drive bridge circuit to control the signal to get relative voltage signals to control the load current size. The double electrode power amplifier without bias current has wide application prospect.

The invention relates to a carbon fiber metal laminate. The invention aims at the problem that, so far, flight vehicle structure materials, which not only has high specific strength and high specific stiffness, but also has high fracture toughness and processability, are non-existent. The inventive laminate is composed of at least two metal plates and at least one carbon fiber composite material layer; at least two metal plates are superposed together, a carbon fiber composite material layer which is adhesively bonded with the two adjacent metal plates are laid between the two adjacent metal plates; the thickness of the metal plate is 0.2m-0.4m and the thickness of the carbon fiber composite material layer is 0.15mm. The inventive laminate has high specific strength and specific stiffness, high fracture toughness and processability, and is also excellent in fatigue property and loss tolerance property. The invention can be used as a structure material for aerospace flights, such as a skin material of large civil planes, and can also be used as alternative material of metal auto panels, magnetically levitated train, light bulletproof armor and ship, etc.

The invention discloses a maglev bogie fatigue test loading device, which comprises a testing platform base, a support base, an air spring support, a loading power part used for loading a bogie according to a requirement, and a load transfer device arranged between the loading power part and the bogie, wherein the testing platform base is fixed on the ground; the support base is fixed on the testing platform base; the lower end of the air spring support is pivoted with the support base through a pin roll; the extension direction of the axis of the pin roll is parallel to the front-back direction of the bogie; the upper end of the air spring support is connected with an air spring connecting seat of the bogie; and a horizontal pull rod connecting seat is arranged on the side of the supportbase, and is connected with a side-rolling resistant beam of the bogie through a horizontal pull rod. The maglev bogie fatigue test loading device can well simulate the fatigue load on the bogie, andaccurately test the fatigue property of the bogie.

The invention relates to the technical field of single levitation chassis testing for a maglev train, in particular to an electromechanical coupling vibration test device for the maglev train. The device comprises a primary platform for simulating ground support, a secondary platform which is positioned above the primary platform and simulates a track beam, and a track beam rigidity adjusting system for connecting the primary platform and the secondary platform, wherein the track beam rigidity adjusting system and the secondary platform supported by the track beam rigidity adjusting system form simulated maglev train track beam characteristics; and a hydraulic shock excitation system which applies excitation to the primary platform so as to simulate geometrical irregularity of track ground is fixed under the primary platform. The defects of the simplified single-point test or complete-vehicle debugging test for the conventional maglev train are overcome, the complex laboratory simulation of levitation control, elastic beam and coupling vibration environment of a levitation chassis mechanism for the maglev train is realized, the gap in research of key technology for domestic and overseas maglev trains is filled, and a scientific test means is provided for design of a levitation control system of the maglev train, the track beam characteristics and design of the mechanical structure of the levitation chassis.

The invention discloses a hybrid maglev gravity compensation apparatus comprising a static gravity compensation module. The static gravity compensation module comprises: an intermediate moving component, an exterior fixed component arranged around the intermediate moving component, and a bottom fixed component arranged below the intermediate moving component. The intermediate moving component is in a radially suspended state with the magnetic forces between the exterior fixed component and the intermediate moving component, such that a vertical guiding to the intermediate moving component is carried out. Static gravity compensating between the exterior fixed component and the intermediate moving component can be carried out with adjustable magnetic forces. According to the invention, non-contact displacement between relatively moving objects can be achieved with maglev forces. Meanwhile, gravity compensation, horizontal and vertical decoupling of a wafer supporting stage can be achieved.

The invention discloses a GNSS/SINS combined navigation precise speed measurement and positioning method and system. Navigation data output by SINS and GNSS is fused, the signal tacking process and data fusion are real-time synchronous, the obtained data is the most accurate at any time, and by fully utilizing the advantages that the SINS is high in short-term precision, outside interference doesnot exist, and the GNSS is high in long-term precision, the defects that the SINS is low in long-term precision, and the GNSS is likely to be interfered are overcome; the precision of speed measurement and positioning is improved, and the problem that a solid wheel rail free traditional train adopts a traditional speed measurement method, and then the train speed cannot be measured precisely is solved; strong support is formed for rapid development of the maglev train industry, and meanwhile development of the Beidou satellite application industry is driven, and the method and system can be promoted in rail transportation such as automatic driving or self-driving.

A vertical shaft maglev wind power generator is composed of vanes, a rotary shaft, a power generator, a radial magnetic bearing, an axial TDOF magnetic bearing, an upper protection bearing, a lower protection bearing, an upper protection bearing retainer ring and a lower protection bearing retainer ring; the rotational part and the stationary part of the fan are not in mechanical contact, the mechanical friction in the fan is completely eliminated and the FDOF levitation of the fan rotor is realized. The axial magnetic bearing of the fan supplies gravity offset through 4 stator magnetic poles and the effect of a suction disc and performs axial translation and two radial rotational DOF control on the rotor; and the radial magnetic bearing finishes the two radial translation control of the fan rotor. The invention has reasonable layout of the components, completely eliminates the friction problem of the vertical shaft fan bearing, greatly reduces the starting wind speed of the wind power generator and improves the wind energy utilization rate.

The invention discloses a low-energy-consumption no-motor-drive type transmission device used for a stenter, which comprises brackets; electrostatic magnets are evenly mounted on the brackets; guide rail supports are mounted at the centers of the two brackets; a maglev guide rail pair is mounted on the guide rail supports; a lower bearing block is installed on the maglev guide rail pair; a movable electromagnet is installed on the lower bearing block; an upper bearing block is installed on the movable electromagnet; a workbench is installed on the upper bearing block; and coils are wound on all the electrostatic magnets and the movable electromagnet. According to the invention, no motor drive and automatic guiding of the movable guide rails are realized, the energy consumption during the transmission operation is greatly reduced, the friction in the transmission process is eliminated and the precision in the working process is improved.

The present invention provides a method for preparing a carbon/carbon-silicon carbide material used by the skid of the magnetic suspending train, which comprises the following procedures in sequence: when the weftless fabric and the ply tire distance-alternating laminate are needled to the quasi-three dimensional carbon fiber whole felt with density 0.4-0.58g/cm<3>, executing a high-temperature treatment with temperature 1800 DEG C-2300 DEG C, executing pyrolytic carbon densification with an equal-temperature CVI or thermal gradient CVI method to prepare a porous C/C base substrate with density 1.4-1.5g/cm<3>, under the protective atmosphere executign 2000 DEG C-2300 DEG C high-temperature treatment to the base substrate, and executing non-immersing orienting fusing Si imbibition at 1500 DEG C to 1650 DEG C. The invention settles the problem that the C/C-SiC magnetic suspending skid prepared by the two-dimensional carbon cloth laminated layer is easily layered and beaked off and disabled, the production period is far lower than that in the method that the C/C magnetic suspending skid is prepared by CVI and impregnation charring, the production technique is simple and the production cost is low.

A simple permanent-magnet-excited maglev geometry provides levitation forces and is stable against vertical displacements from equilibrium but is unstable against horizontal displacements. An Inductrack system is then used in conjunction with this system to effect stabilization against horizontal displacements and to provide centering forces to overcome centrifugal forces when the vehicle is traversing curved sections of a track or when any other transient horizontal force is present. In some proposed embodiments, the Inductrack track elements are also employed as the stator of a linear induction-motor drive and braking system.

A maglev lamp comprises a base and a maglev lamp body, wherein the base is provided with an electromagnet and the maglev lamp body is provided with a magnet. The maglev lamp is characterized in that a plurality of hall sensors used for sensing magnetism are symmetrically arranged on the upper surface of the base and connected with a control board, the control board is provided with a signal comparing circuit used for comparing signals of the hall sensors and a current reversing circuit, the current reversing circuit is used for changing the current direction of the electromagnet, and when the signal comparing circuit detects that the signals of the symmetrically arranged hall sensors are different, the current reversing circuit starts working, and the current direction can be restored after the current reversing circuit stops working after several seconds. The maglev lamp has the advantages that when the maglev lamp deviates, the maglev lamp can be attracted back timely and re-suspended, and the lamp can be prevented from falling to the outside of the base; the maglev lamp is multifunctional and can be used as a small voice box and is better in light effect.

The invention provides a graded braking method for a maglev train including an electric brake system, a mechanical brake system and an alighting brake system. The graded braking method for the maglevtrain comprises the steps of calculating a corresponding electric brake curve, a corresponding mechanical brake curve and a corresponding alighting brake curve for each brake mode of the maglev trainin real time according to obtained current line data, vehicle condition data and passenger comfort restriction condition, wherein each brake curve represents that the train triggers speed triggering thresholds of corresponding braking in different positions from a target speed reduction point under a situation of the current line data and the vehicle condition data in order to satisfy a target speed reduction requirement and satisfy a passenger comfort restriction condition before reaching the target speed reduction point.

The invention relates to a suspension control method for a magnetic suspension system, which comprises the steps: adopting a current loop to accelerate the rising velocity of the current i in an electromagnetic coil; adjusting a position loop to control the suspension performance in a set range; eliminating the static error during stable suspension by controlling the integral of a suspension clearance; selecting an integral control parameter ki so as to eliminate the influence of the suspension clearance integral on suspension performance; using a suspension performance index to adjust a suspension clearance control parameter kp and a suspension clearance differential control parameter kd; determining laden variable quantity according to the variation of stable suspension current i; corresponding changes the suspension control parameters kp and kd according to the variation of suspension current i0 so as to adjust the voltage control variable u2 at the both ends of an electromagnet in the suspension process and keeping the suspension performance unchanged all the time under the condition of variable load. By using the current of the magnetic suspension system when the suspension is stable to change the suspension control parameters, the method can not only overcome the disadvantages of the ordinary PID control method, but also has the advantage of easy realization of the ordinary PID control method.