Electromagnetic resonance wireless power supply system for subway

Abstract

The invention relates to an electromagnetic resonance wireless power supply system for a subway. The electromagnetic resonance wireless power supply system mainly comprises a power source unit (1), a rectification filter module (2), a chopped wave power oscillating circuit (3), a signal control module (4), an electromagnetic field emission circuit (5), an electromagnetic field receiving coil (6), a rectification filtering chopped wave module (7), an inverter module (8), a locomotive (9) and an electromagnetic field shield (11). By using the electromagnetic resonance wireless power supply system for the subway, the transmission mode of electric energy is expanded, a safer subway power supply mode is designed, the friction between the original pantograph and a power transmission line is eliminated, the risk to maintainers and passengers, caused by the contact rail power supply mode, is avoided, and the maintenance cost of the subway in the operation is reduced; the design and construction are convenient, the transformation on the existing subway circuit and locomotive is only needed, the cost is lower than that of other wireless power supply structures, the structure is stable and reliable, the safety is high, and the market prospects are promising.

Description

technical field [0001] Wireless power transmission technology is currently one of the most active hot research directions in the field of electrical engineering. It integrates basic research and applied research. And cutting-edge topics, covering electromagnetic fields, power electronics technology, power systems, control technology, physics, materials science, information technology and many other technical fields. The wireless power supply method can effectively overcome various defects in the wire connection method and realize the free power supply of electronic appliances, which has important application expectations and broad development prospects. [0002] The electromagnetic resonance wireless power supply system for subways of the present invention relates to a convenient construction, convenient system, stable operation, safe and reliable wireless energy transmission electromagnetic resonance coupling technology, which provides a technical model for wireless power sup...

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Problems solved by technology

[0004] At present, the subway power supply can be divided into two types: overhead catenary and catenary rail. AC25kV or DC1500V lines use the catenary system, and the cost of the catenary is high, especially the three-rail catenary, which basically relies on imports. In addition, the The method requires the subway train to be equipped with a pantograph, which contacts the catenary to obtain electric energy, but the carbon plate of the pantograph needs to be replaced frequently due to serious wear and tear, which is troublesome to operate and expensive to maintain. At the same time, this method is greatly affected by high-altitude foreign objects , For example, domestic garbage and plastic bags falling on the car, hanging on the catenary, and entangled on the pantograph will interfere with the normal operation of the train and cause the train to stop temporarily. However, the current popular DC750V contact rail power supply is used in trains. 750V direct current is connected to the rails of the subway, which will bring great danger to the maintenance staff under the trains. In addition, the existing subway tracks cannot be completely shielded, and the lives of passengers who fall off the platform due to missteps are even more dangerous. , Passengers who accidentally touched the contact rail and died in a click were also reported in the news

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