Automobile wireless charging system and control method thereof

Abstract

The invention discloses an automobile wireless charging system and a phase lock control method thereof. The automobile wireless charging system comprises a pile end module, a ground end module, an automobile end module and an automobile end controller. The vehicle end controller obtains the switch phase of a power switch in the vehicle end converter, samples the output current I2 of the vehicle end resonance compensation module, and calculates the system period of the input current I1 of the pile end resonance compensation module; calculating the phase difference Phaase-T between the switch phase and the output current I2 of the vehicle end resonance compensation module, controlling the phase and the period of a power switch in the vehicle end converter, and controlling the phase difference Phaase-T within a phase difference set value Phaase-ref; a vehicle end controller obtains system periods under different coupling conditions, and self-adapts to phase-locked control of wireless charging under different height scenes; phase signals of the pile end module do not need to be sampled, hardware circuits are reduced, and cost and space are saved.

Description

technical field [0001] The invention relates to the technical field of electric vehicle wireless charging, in particular to a vehicle wireless charging system and a phase-locking control method thereof. Background technique [0002] With the rapid development of electric vehicles in the world in recent years, how to realize the safe and convenient charging of electric vehicles is of great significance. The traditional solution for electric vehicle charging is to directly obtain electric energy from the grid through charging piles. However, when electric vehicles are charged by wires, the charging socket or cable usually has exposed parts. When charging at high power, it is easy to generate sparks and arcs. At the same time, with the application of new technologies such as automatic driving and automatic parking, people expect that there will be no manual intervention in the use of electric vehicles, and the call for automatic charging of electric vehicles is getting louder a...

AI Technical Summary

Problems solved by technology

Electric vehicle wireless charging technology usually installs a receiving end on the chassis of the electric vehicle, and generates an induced current through the magnetic field generated by the transmitting end installed on the ground or underground, and charges the battery of the electric vehicle after being rectified into DC. There is no physical connection with the transmitter, and the phase difference information

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