Intelligent rail-holding high-temperature superconducting maglev train system

Abstract

The invention discloses an intelligent rail-holding high-temperature superconducting maglev train system, which is characterized in that a plurality of magnetic circuits of four electromagnetic rails of an intelligent rail-holding subsystem are linearly arranged, a plurality of single coils are connected in series in the same direction, the four electromagnetic rails generate a continuous and uniform magnetic field in the rail direction, pinning magnetic flux generated by 16 monitoring type intelligent Dewars of an independent system unit surrounds the four electromagnetic rails, the acting force of automatic suspension, automatic stabilization and automatic guiding of the maglev train is enhanced, the electromagnetic field intensity of four electromagnetic rails and a middle electromagnetic rail of a section can be controlled and the electromagnetic field can be turned off under the control of a photoelectric proximity switch and a wireless remote control receiving module of a plurality of section converters, the four electromagnetic rails outside the section and the middle electromagnetic rail are all in a power-off state; and a moving magnetic field generated by the electromagnetic rails in the section drive a variable-frequency linear generator rotor, and the linear generator rotor induces alternating current.

Description

technical field [0001] The invention relates to a high-temperature superconducting maglev train, specifically, an intelligent rail-holding high-temperature superconducting maglev train system. Background technique [0002] At present, the high-temperature superconducting maglev train of our country's existing technology is still in the experimental stage. The high-temperature superconducting maglev train is a maglev train based on the magnetic flux pinning effect between the high-temperature superconductor and the permanent magnet track. The train does not need precise active control. It can be stably suspended on the track to realize the automatic suspension, automatic stabilization and automatic guidance of the train. The high-temperature superconducting maglev train not only has a stable magnetic levitation state, but also has no magnetic resistance. When the train is running, there is no resistance except air resistance. The energy-saving effect is remarkable; the invent...

AI Technical Summary

Problems solved by technology

[0005] The beneficial effect of the intelligent track-holding high-temperature superconducting maglev train system is that: the magnetic field distribution generated by the permanent magnet track built by the permanent magnets used in the existing high-temperature superconducting maglev trains is limited by the magnetization intensity and magnetization direction of the unit permanent magnet, and lacks Denaturation, the magnetic field of the permanent magnet track cannot be turned off, resulting in magnetic pollution of the whole permanent magnet track; the four electromagnetic tracks of the intelligent rail holding subsystem are all intelligently controlled electromagnetic tracks; the multiple magnetic circuits of the four electromagnetic tracks are straight The arrangement and multiple single coils are connected in series in the same direction, so that the four electromagnetic tracks can generate a continuous and uniform magnetic field along the track direction. The magnetic field strength and magnetic field distribution can make the suspension force of the high-temperature superconducting block placed in the suspension area reach the required The required strength, and can move smoothly along the direction of the track, so as to achieve the purpose of replacing the permanent magnet track; the upper left electromagnetic track, the upper right electromagnetic track, the lower left electromagnetic track, and the lower right electromagnetic track form a 4-angle symmetrical balance moment; 16 of the independent system unit A monitoring intelligent Dewar produces a stable pinning magnetic flux, which has both repulsive and attractive magnetic forces. The repulsive magnetic force of the upper left electromagnetic track and the upper right electromagnetic track and the attractive magnetic force of the lower left electromagnetic track and the lower right electromagnetic track support the independent system unit. Gravity; the pinned magnetic flux generated by the 16 monitoring-type intelligent Dewars of the independent system unit surrounds the 4 electromagnetic rails, which strengthens the automatic suspension, automatic stabilization and automatic guidance of the independent system unit, and overcomes the force of the train when turning Centrifugal force stabilizes the steering of the train, and the diamagnetic effect of the high-temperature superconducting block enables the independent system unit to be stably suspended between the four electromagnetic rails without precise active control; Intelligent power supply under the sequential control of the receiving module, the electromagnetic field strength of the 4 electromagnetic tracks and the middle electromagnetic track in the section can be controlled, the electromagnetic field can be turned off, and the 4 electromagnetic tracks outside the interval and the middle electromagnetic track are in a power-off state, and the smart track It not only saves energy, but also avoids magnetic pollution; the variable frequency linear motor adopts the mode of driving multiple short movers by the stator of the section section, and there are intervals between the multiple short movers, and the electromagnetic track in the section is a variable frequency linear motor and a linear generator. The stator of the interval segment, the magnetic levitation train unit represents a plurality of short movers, the length of the electromagnetic track in the interval is longer than that of the magnetic levitation train set; the multiple single coils of the interval segment stator are all connected in series, and the interval segment stator is connected with the variable frequency linear motor mover and the linear motor The magnetic flux density of the multiple single-coil parts close to the generator movers is large, so that the impedance of the multiple single-coils is large, the voltage drop is large, and the useful power is large; the multiple single-coil magnetic fluxes of the remaining parts of the section segment stator The density is small, so that the impedance of the multiple single coils is small, the voltage drop is small, and the useless power is small; under the condition that the air gap between the multiple short movers and the section stator is stable, during the linear motion of the multiple short movers In the middle, the front and rear section converters continuously supply power to the front and rear section stators. In order to maximize the stress area of ​​multiple short movers for the section section stators, the useful power of the front section section stators changes from small to large. The useful power of the section stator changes from large to small, which causes copper loss defects in the 3-phase coil of the section stator, and makes the work efficiency of the frequency conversion linear motor and linear generator not high; but there is no friction in the high temperature superconducting maglev train Resistance, the frequency conversion linear motor can accelerate the maglev train to 600 km / h without a large drive power, the power consumption of the maglev train control system is small, so that the power of the linear generator is small, even if the frequency conversion linear motor and linear generator The work efficiency is not high and does not affect the energy-saving effect of the maglev train; when the maglev train leaves the stator of the rear section, the impedance of multiple single coils of the stator of the rear section is small, so that the output current of the frequency modulation and voltage regulation module is greater than the rated value, and the electronic frequency modulation The voltage regulating module is automatically shut down, and the stator in the rear section is automatically powered off; the failure of any part of the high-temperature superconducting magnetic levitation mechanism, power supply mechanism, traction mechanism, control mechanism and braking mechanism of the independent system unit does not affect the normal work of other independent system units , once a power outage accident occurs in the intelligent track subsystem, the maglev train set will descend, and multiple left and right brake shoe planes will be supported on the left upper and right upper electromagnetic track planes, and the maglev train set will automatically perform emergency braking to avoid accidents; Multiple monitoring intelligent Dewars are equipped with high-temperature superconducting blocks. When low-temperature liquid nitrogen is injected into multiple Dewars, the high-temperature superconducting blocks cool down to a superconducting state. Due to the complete diamagnetism of the high-temperature superconducting blocks, The maglev train set can be suspended between 4 electromagnetic rails. Due to the pinning effect of the high-temperature superconducting blocks, the maglev is self-stabilizing without any maglev control system; the temperature of multiple high-temperature superconducting blocks can be seen on the monitor to; the positive pressure liquid nitrogen replenishment Dewar tank, the negative pressure gas nitrogen recovery Dewar tank and a plurality of solenoid valves constitute a simple low-temperature refrigeration system, and realize intelligent temperature control; the monitoring intelligent Dewar high temperature ultra- The bracket of the guide block can meet the requirements of high mechanical strength during the high-speed running of the train; the upper and lower vacuum chambers and the annular vacuum chamber of the monitoring intelligent Dewar reduce the heat leakage of the Dewar system; under the protection of the brass high-temperature superconductor cavity , so that the high-temperature superconducting block material can run safely and stably; the power supply system of the intelligent track saves the high-voltage catenary power supply system of the prior art, and the power supply reliability is improved; there is no frictional resistance in the high-temperature superconducting maglev train, and the frequency conversion linear motor is A high-speed 2-pole 3-phase AC induction asynchronous variable frequency motor, therefore, the section stator does not need a large driving power to accelerate the maglev train to 600 km / h, and the energy-saving effect of the intelligent rail-holding high-temperature superconducting maglev train system is remarkable

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