Wireless electric energy transmission system in dynamic operation of electric automobile

Abstract

The invention discloses a wireless electric energy transmission system in dynamic operation of an electric automobile and belongs to the technical field of charging devices. The wireless electric energy transmission system in dynamic operation of the electric automobile is divided into N sections of strokes. Each section of stroke has one single-power-source combined system which comprises a bridge arm combined multi-way output high-frequency inverter main circuit composed of five bridge arms, a control circuit, 10 electromagnetic resonance type wireless electric energy transmitting resonant loops composed of transmitting coils and compensation capacitors and laid closely under a pavement, a photoelectric switch assembly for detecting the position of the electric automobile and a rectification motor driving device which is composed of an electromagnetic resonance type wireless electric energy receiving device, a rectifying circuit, a short-time energy storing device and a motor driving circuit, and the electromagnetic resonance type wireless electric energy receiving device is composed of vehicle-mounted receiving coils and compensation capacitors. By means of the wireless electric energy transmission system in dynamic operation of the electric automobile, inverter bridge dynamic combination composed of switch tubes is adopted for supplying power to the multiple transmitting coils in turns, a relay switch is not needed for switching the transmitting coils, the limit of the service life of the switches is avoided, and the safety problem caused by electric arc existing in switch contact on-off process is avoided.

Description

technical field [0001] The invention relates to a wireless power transmission system during dynamic operation of an electric vehicle, and belongs to the technical field of charging devices. Background technique [0002] Electric vehicle wireless charging technology (also known as non-contact charging technology) has no direct contact with wires in the process of power transmission, and there is no power safety hazard, which can well solve the inconvenience and unsafe problems of using charging pile plug-in charging method . There are many charging methods in the wireless charging technology. The driver can drive the car to the designated charging area, and then it can be charged automatically. This technology is called static wireless charging technology for electric vehicles. The main problems of static wireless charging include frequent charging, short cruising range, large capacity and bulky energy storage equipment, and high cost. The cruising range of each charge is de...

AI Technical Summary

Problems solved by technology

However, this method of using a program-controlled switch to switch the transmitting coil is limited in practical applications, that is, if the electric vehicle is driven at a speed of 100 km / h, the coupling time between the transmitting coil and the on-board receiving coil is only 0.043 seconds, and the program-controlled switch cannot meet the requirements for completing the coupling time. The switching speed will be limited by the life and safety of the programmable switch, which will affect its wide application

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