Multi-load wireless electric energy transmission system of domino structure

Abstract

The invention discloses a multi-load wireless power transmission system with a domino structure. The multi-load wireless power transmission system comprises a transmitting unit, M + 1 relay units, M receiving and transmitting units and a receiving unit. The units are arranged according to the following rule: the transmitting unit is in the first, the receiving unit is in the last, and the relay units and the receiving unit and the transmitting units are arranged in the middle, and arranged repeatedly in sequence and end up with one relay unit. and wireless transmission of electric energy is sequentially carried out between adjacent units through electromagnetic coupling between transmitting coils and receiving coils in loose coupling transformers. According to the system, the plurality ofrelay units are used as a high-order compensation network, so that the output voltage at the two ends of each load is independent of the load or other loads and only depends on the ratio of mutual inductance between the transmitting coils and the receiving coils in two adjacent loose coupling transformers. Therefore, the system provided by the invention has the advantages of freer design, simplercontrol, stronger environmental adaptability, lower cost and the like.

Description

technical field [0001] The present invention relates to the technical field of multi-load wireless power transmission or multi-load wireless power transmission, in particular to a multi-load wireless power transmission system with a domino structure. Background technique [0002] In the past ten years, wireless power transmission technology based on electromagnetic resonance coupling or electromagnetic induction coupling has made great progress. Wireless power transmission technology can not only eliminate the fetters of wires and bring convenience to customers, but also is expected to provide power for multiple receiving loads, which saves space and reduces material costs. In a traditional multi-load wireless power transmission system, a high-frequency inverter is usually used to supply power to the resonant cavity at the transmitting end. The transmitting coil generates a high-frequency alternating magnetic field and couples it to multiple receiving coils. The magnetic ene...

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Problems solved by technology

However, the load is often in a changing state. A change in a certain load will cause a drastic change in the output voltage at both ends of itself and the output voltage at the other ends of the load. Usually, a voltage stabilization module is added after the rectification stage or the operating angular frequency of the system is adjusted in real time to control Stabilization of the final output voltage. Unfortunately, these measures will increase the cost of system materials and complicate the control process, and also lead to a decrease in system stability and overall efficiency

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