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

A technology for wireless power transmission and integrated transformers, applied in the manufacture of inductors/transformers/magnets, current collectors, battery circuit devices, etc. flow, high power density, cost reduction effect

CN114678968APending Publication Date: 2022-06-28SHANGHAI JIAO TONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2022-06-28

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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.
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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...

Examples

Embodiment 1

[0033] This embodiment implements a high and low voltage compatible wireless power transmission system.

[0034] This embodiment is a high and low voltage compatible wireless power transmission system, which can be compatible with charging requirements of different voltage levels through the series-parallel connection of modules, and can automatically achieve voltage equalization and current equalization output between modules. This embodiment is a high and low voltage compatible wireless power transmission system. By designing the leakage inductance and transformation ratio of the transformer, the integration of the resonant inductance and the transformer is simply and efficiently realized. The way of redesigning parameters and adding DC-DC converters greatly reduces the cost of the wireless power transfer system, improves the efficiency of the wireless power transfer system, and realizes voltage and current sharing between the rectifiers.

[0035] figure 1 It is a circuit s...

Embodiment 2

[0047] This embodiment implements a high and low voltage compatible wireless power transmission system. This embodiment is implemented on the basis of Embodiment 1.

[0048] In this embodiment, a high and low voltage compatible wireless power transmission system is designed according to the original 400V battery charging voltage for wireless charging of electric vehicles. The resonant inductance integrated transformer is used to replace the VA terminal resonant inductance, and the transformation ratio of the resonant inductance integrated transformer is set to When n=1, it can be used to charge a 400V battery; when the battery charging voltage is adjusted to 800V, the resonant inductance integrated transformer transformation ratio n=0.5 is adjusted, and the battery charging voltage can be adjusted to 0.5 without changing any other circuit parameters. 800V.

[0049]Since the forward conduction voltage of the silicon diode has a negative temperature coefficient, it cannot be di...