Overhead high speed train

Abstract

An over-head high-speed passenger train is characterized by that it is electrically powered in a relay mode, the IGBT frequency converting technique is used for its DC / AC conversion, and the 3-phase asynchronous motor is used as its power. Its speed is 400-500 Km / h.

Description

1. Technical field [0001] This new overhead high-speed train mainly includes the following four technical fields: [0002] 1. Power field: mainly includes power transmission and conversion technology. [0003] 2. Electronic field: mainly including train control and communication technology. [0004] 3. Mechanical field: mainly including train structure and track structure. [0005] 4. Construction field: mainly includes overhead track support frame and parking station. 2. Background technology [0006] There are mainly two types of high-speed trains currently in operation, and their working principles and performances are as follows: [0007] 1. High-speed maglev train [0008] Maglev trains use the principle of linear motors to expand the three-phase stator windings of the motor along the track in a straight line. The whole train is like the rotor of the motor, and can obtain induced current without any contact with the stator, thereby generating su...

AI Technical Summary

Problems solved by technology

The disadvantages are: (1) laying long-distance, large-capacity, low-voltage three-phase stator windings along the track requires a huge amount of money

(2) In order to ensure the safe floating of the train, it is necessary to spend a large amount of money to ensure the reliability of power supply

(4) Due to the heavy weight per unit length of the train, the construction of the overhead track is also a huge expense

(5) Generating a three-phase alternating magnetic field (that is, a moving magnetic field) along the track requires more and more complex control equipment

The main disadvantage of this kind of train is in the power transmission system, which is as follows: (1) Since the power transmission adopts AC power supply mode, although the power supply reliability has been improved, the power supply capacity and transmission distance are greatly limited, making the power supply along the line There are many stations, which increases investment and power loss

(2) Due to the single-phase power transmission, even if 120-degree commutation is adopted, it will still cause a large three-phase imbalance in the power supply system, which is not conducive to the safe operation of the power system

(3) Due to the complex structure of the overhead catenary, poor overload capacity, typhoon resistance, and earthquake resistance, the construction and maintenance costs of the overhead catenary are quite large, and the reliability is poor

(4) Since most of the tracks are laid along the ground and occupy a large area, on the one hand, it is not conducive to the safe running of high-speed trains, and on the other hand, it is also not conducive to the construction of other crossing roads

(5) Since the traction and braking force of this kind of train depends on the friction between the "wheel-rail", its starting performance and braking performance are relatively poor

[0012] This kind of high-speed train is currently widely used in some developed countries such as Japan and France. Although this kind of high-speed train has many advantages, the overall investment is also quite high, which is not conducive to popularization.

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