A method for efficient transmission of wireless energy based on pcb coils

Abstract

The invention discloses a PCB coil-based high-efficiency wireless energy transmission method. The transmission distance of PCB coil wireless power transmission is also limited by the transmission efficiency. The present invention is as follows: Step 1, calculate the inductance value L of sending coil and receiving coil; 2, calculate the parasitic resistance value R of sending coil and receiving coil; 3, calculate the parasitic capacitance value C of sending coil and receiving coil; Step 4, establish The relationship between transmission efficiency η and input frequency f, and determine the corresponding maximum input efficiency η max The input frequency f a . Input the frequency to the sending coil to obtain f in step 4 a The alternating current; the mutual inductance between the sending coil and the receiving coil, and the receiving coil outputs alternating current. The invention improves the efficiency of the wireless power transmission by optimizing the frequency of the input alternating current when the PCB coil wireless power is transmitted.

Description

technical field [0001] The invention belongs to the field of electronic technology, and in particular relates to a method for efficiently transmitting wireless energy based on a PCB coil. Background technique [0002] Wireless power transmission technology can realize non-contact power transmission, which can reduce the trouble caused by traditional wired transmission. Magnetic coupling resonant wireless power transmission is one of the commonly used technical means. At present, the key problem limiting the wide application of magnetic coupling resonant wireless power transfer technology is the low power transfer efficiency. Transmission efficiency is related to the geometric size of the coil, transmission distance, load, and operating frequency. PCB coils can standardize coil manufacturing. PCB coils are hard substrate coils that can effectively protect the coils from deformation. They are mainly used for wireless power transmission in occasions prone to collisions and de...

AI Technical Summary

Problems solved by technology

In the field of wireless power supply for consumer electronics, the shape of the PCB coil often depends on the shape of the wireless charger's shell and the specific application scenario. The limitation of the shape of the coil also directly leads to the inability to optimize the transmission efficiency by optimizing the coil size.

At the same time, the transmission distance of PCB coil wireless power transmission is also limited by the transmission efficiency.

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