Method and equipment for supplying power in no touch mode through higher harmonics of high-speed magnetic suspension train

Abstract

A high-order harmonic method for supplying electric power to magnetic levitation train without contact features that a high-order harmonic voltage with a certain amplitude and frequency is added to the three phase coils of stator of ground three-phase frequency converter by a phase difference of 120 deg to provide three phase output voltage, and said harmonic voltage can generate an additional travelling-waven magnetic field, whose base wave can cut the additional electric generating coil on the magnetic pole of train for generating electric energy used to charge accumulators of train.

Description

technical field [0001] The invention relates to maglev trains, in particular to a method and device for high-order harmonic non-contact power supply of maglev trains. Background technique: [0002] The electric energy on the maglev train car is supplied by the on-board battery. The energy in the on-board battery can only provide the train to run for a period of time. In order to ensure the normal operation of the train for a long time, it is necessary to charge the on-board battery in time. When the maglev train is running, the three-phase AC voltage output by the three-phase inverter on the ground acts on the three-phase stator coil of the linear synchronous motor to generate a traveling wave magnetic field. The fundamental component of the traveling wave magnetic field pushes the train forward, while there is relative motion between the traveling wave harmonic magnetic field and the train. The harmonic magnetic field cuts the coil of the on-board linear generator to make...

AI Technical Summary

Problems solved by technology

The voltage generated by the on-board linear generator is proportional to the relative cutting speed. When the maglev train is running at a low speed, the voltage generated by the on-board linear generator cannot meet the needs of sufficient power supply for the battery on the train and when the energy of the on-board battery is exhausted, it will Stopping the maglev train

Commonly used methods to solve the problem of train sudden stop are as follows: one is to use the power supply rail to supply power to the train when the maglev train stops suddenly to ensure that the train can continue to run, but this method needs to add a very long power supply rail, so The cost is relatively large; the second is that when the maglev train stops suddenly, the standby charging car parked at the nearest parking point is activated, but it takes a long time for the spare charging car to travel from the parking point to the sudden stop point of the train. If it is placed on the ground line Multiple spare charging vehicles will cost more

Abroad, there is a patent report (Germany, Publication No. DE3237373A1, publication date November 5, 1983) on cutting the induction coil placed on the vehicle with the space high-order harmonic magnetic field produced by the suspension coil of the magnetic levitation train to generate the electric energy required by the electric load on the vehicle ), but it does not solve the problem of sufficient power supply of the on-board battery when the train is running at low speed

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