A high-speed maglev transportation system and its train traction power supply system

Abstract

The invention discloses a tractive power supply system and a high-speed magnetic levitation traffic system of a high-speed magnetic levitation train. The tractive power supply system comprises a linear motor and M first tractive power supply devices. A primary coil of the linear motor is arranged along a track, and a secondary coil is arranged along the train. The primary coil comprises N coil modules, and each coil module comprises M coil units; the length of the coil units is smaller than the length of the secondary coil; N and M are integers not smaller than 2; the mth coil units of the two adjacent coil modules are connected in series, and m is from 1 to M; the input ends of the coil units in the first coil module are correspondingly connected with the output ends of the first tractive power supply devices; the input ends of the first tractive power supply devices are connected with a power grid through a second tractive power supply device. The system achievement difficulty and cost are lowered to a certain extent.

Description

technical field [0001] The invention relates to the technical field of high-speed maglev transportation systems, in particular to a traction power supply system for high-speed maglev trains and a high-speed maglev transportation system. Background technique [0002] At present, in the traction power supply system of a high-speed maglev train, the train is mainly driven by a linear motor to make the train run at high speed. In this system, the primary coil of the linear motor is arranged along the track, and its secondary coil is arranged along the train, please refer to figure 1 , figure 1 It is a structural schematic diagram of a traction power supply system of a high-speed maglev train in the prior art. In the prior art, the length of a single primary coil of a linear motor is much greater than the length of a secondary coil, wherein the length of a secondary coil of a linear motor is approximately equal to the length of a train. Depend on figure 1 It can be seen that ...

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Problems solved by technology

Then, for the traction power supply system of the high-speed maglev train in the prior art, the effective length of its linear motor is equal to the length of the coupled inductance of the linear motor (i.e. the length of the secondary coil), and because the length of the secondary coil of the linear motor is approximately equal to that of the train Length, that is, the effective length of the linear motor in the prior art is longer, so when the train is running, the back EMF generated by the linear motor is relatively high, and the leakage impedance generated by the transmission line and the primary coil accounts for a small proportion, so the ground The power supply voltage of the traction power supply equipment on the grid changes synchronously with the back EMF. The higher the back EMF, the higher the power supply voltage. Therefore, a higher back EMF leads to an increase in the withstand voltage level of the corresponding traction power supply equipment, resulting in the breakdown of various high-voltage transmission lines. The improvement of the withstand voltage level and the improvement of the insulation level of the primary coil of the linear motor increase the difficulty and cost of manufacturing the corresponding traction power supply equipment, various high-voltage transmission lines, and the primary coil of the linear motor in the system, which in turn leads to an increase in the manufacturing cost of the entire high-speed magnetic levitation system. The difficulty and cost increase of the traction power supply system of the train

[0004] On the other hand, in the traction power supply system of the high-speed maglev train in the prior art, multiple trackside switch stations need to be set up, and each trackside switch station occupies a large area and the cost of components is high, thereby increasing the cost of the entire high-speed maglev train. The implementation difficulty and cost of the traction power supply system are relatively high

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