Wireless charging system for electric vehicles

Abstract

The invention provides a wireless charging system for electric vehicles. The wireless charging system for the electric vehicles specifically comprises a first rectifier bridge, a first-stage voltage regulator, an intermediate capacitor, a second-stage voltage regulator, an inverter, a primary side reactive power compensator and a primary side transmitter connected successively with the primary side, and a secondary side receiver, a secondary side reactive power compensator and a second rectifier bridge connected successively with the secondary side; and the wireless charging system for the electric vehicles also comprises a primary side controller and a secondary side controller. The wireless charging system for the electric vehicles provided by the invention can work at a higher transmission power, can ensure the primary side full-bridge inverter work at zero-voltage switching-on state, and can make the transmission efficiency of the wireless charging system be greatly improved through adjusting.

Description

technical field [0001] The invention relates to the technical field of power supplies, in particular to a wireless charging system for electric vehicles. Background technique [0002] With the advancement of my country's energy-saving and emission-reduction policies, new energy vehicles have been widely used, especially electric vehicles, which are driven by electricity and do not produce emission pollution, which is a major measure to achieve energy-saving and emission-reduction in transportation. At present, there are roughly three types of battery energy replenishment methods for electric vehicles: the first type is wired charging, which uses charging sockets, charging guns, charging piles and other charging equipment to charge the batteries of electric vehicles; the second type is wireless charging, which uses wireless The charging system charges the battery of the electric vehicle; the third category is to directly replace the battery pack of the electric vehicle with a...

AI Technical Summary

Problems solved by technology

[0003] At present, the most widely used battery energy supplement method for electric vehicles is wired charging, especially in centralized parking lot charging stations. The charging line between charging devices (for example, connecting the charging head of the charging device to the electric vehicle to be charged) is used to supplement the energy of the charging vehicle battery. However, using this charging method requires a lot of manpower, material resources and time costs

[0004] However, when the wireless charging system is used to charge the battery of an electric vehicle, due to the wide variety of vehicles, the input voltage and acceptable input power of the energy storage battery in the vehicle are different; therefore, it is necessary to provide a compatibility with different types of batteries in the vehicle A better wireless charging system with sufficiently high charging efficiency is an urgent problem to be solved

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