High-low voltage compatible wireless electric energy transmission system and manufacturing method of resonant inductor integrated transformer of high-low voltage compatible wireless electric energy transmission system

Abstract

The invention relates to a high and low voltage compatible wireless power transmission system and a manufacturing method of a resonant inductor integrated transformer thereof. The system comprises a transmitting coil end and a receiving coil end, the receiving coil end further comprises a resonant inductance integrated transformer, a primary winding of the resonant inductance integrated transformer is connected with the receiving end LCC compensation network, and a secondary winding of the resonant inductance integrated transformer is connected with the receiving end rectifier bridge. The leakage inductance of the primary winding of the resonant inductance integrated transformer replaces the compensation inductance of the LCC compensation network at the receiving end to enable the receiving coil end to reach a resonant state at a rated frequency, and the transformation ratio of the primary winding and the secondary winding of the resonant inductance integrated transformer is changed to be compatible with a rechargeable battery charged at high and low voltages. The beneficial effects are that the resonant inductor integrated transformer replaces a resonant compensation inductor to realize impedance matching, and the charging requirements of different voltage levels are met.

Description

【Technical field】 [0001] The invention relates to the technical field of power electronic converters, in particular to a high and low voltage compatible wireless power transmission system and a method for manufacturing a resonant inductance integrated transformer. 【Background technique】 [0002] Wireless power transfer (WPT) technology utilizes magnetic field coupling to realize energy transmission without direct electrical connection, and has the advantages of safety, convenience, and high reliability. In recent years, WPT technology has been applied to mobile phone charging, implantable medical treatment, robotics, electric vehicle charging and other fields, especially in the field of electric vehicle wireless charging, which has a good development prospect. Huawei, WiTricity, VIE and other companies are at the forefront of technology in the field of wireless charging for electric vehicles, and are gradually putting them into practical applications. Therefore, the researc...

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Problems solved by technology

One solution is to remake the VA terminal suitable for 800V battery voltage, which is costly for actual production and is not conducive to product normalization design

The second solution is to add a DC-DC converter in the rear stage of the rectification side, which can solve the problem of load voltage changes, but after adding a first-stage converter, the transmission efficiency of the system will decrease, which will be lower than the minimum required by the SAE J2954 standard Energy transmission efficiency, and the volume of the car-end device is too large to meet the stringent application requirements of car companies

[0004] Existing wireless power transmission power adjustment methods such as phase shift control and frequency modulation control are difficult to cope with the challenges brought by the wide range output voltage of high and low voltage batteries; designing a separate system for each application scenario increases project costs and is not conducive to different devices Compatibility between them; adding an additional DC-DC power regulation circuit will bring about a more significant drop in efficiency

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