An omnidirectional wireless power transmission system and its optimal control method

Abstract

The present invention relates to an omnidirectional wireless electric energy transmission system and a searching optimization control method thereof. The system comprises an emission module, a receiving module and a wireless communication module, the emission module comprises a high-frequency inversion circuit, an emission side compensation network and an emission coil which are connected in order, the emission coil is formed by more than two quadrature coils, and the system also comprises a central processing unit; the receiving module comprises a receiving coil, a receiving side compensation network, a high-frequency rectification circuit, a receiving side electric energy conversion circuit, a load and a sampling feedback circuit which are connected in order; and the central processing unit is configured to realize data receiving and processing of the emission coil, the receiving coil and the sampling feedback circuit to realize omnidirectional wireless electric energy transmission. The omnidirectional wireless electric energy transmission is realized, omnidirectional scanning and addition of a communication module realize the wireless electric energy transmission with maximum efficiency strategy to realize that the method is simple and easy to operate; and moreover, the time division multiplexing charging method is employed to dynamically satisfy the charging demands of all the loads and perform demand customization.

Description

technical field [0001] The invention relates to an omnidirectional wireless power transmission system and an optimization control method thereof. Background technique [0002] Wireless Power Transfer (WPT) is a technology with broad application prospects. It has the advantages of convenient use, safe charging, and the ability to work in harsh environments. It can be used in fields such as electric vehicles, smart homes, implantable medical care, and underground operations. Although scientists such as Tesla conducted research on this technology in the early 20th century, it was limited by factors such as theory and funding, but it was not until recent years that it began to develop rapidly into a new industry. Generally speaking, wireless power transmission methods can be divided into far electromagnetic field radiation and near electromagnetic field coupling. [0003] Due to the moderate transmission distance and power level, resonant wireless power transmission is the mos...

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Problems solved by technology

At the same time, it applied for a PCT patent on load position detection and power control methods for omnidirectional wireless power transmission [5] , a maximum power transfer method is proposed, which is complex to implement and cannot accurately identify foreign objects

The patent "multi-phase excitation-full space pickup wireless energy transfer system and its control method" applied by Chongqing University [6] ,By calculating the mutual inductance between the transmitting and receiving coils to achieve optimal transfer, the actual mutual inductance between the two coils requires precise instrument measurement, especially when the distance between the two coils is relatively small, it is difficult to use instruments to accurately measure

And the above patents all use S / S type compensation network, which is difficult to apply to multi-load and changing load conditions

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