Adjustable wireless charging coil and application method thereof

Abstract

The invention provides an adjustable wireless charging coil which comprises a clockwork coil, a coil baseplate, a reminding device and a controller, wherein the clockwork coil is manufactured into a helical clockwork shape by adopting conductive material; a stepping motor is mounted at the lower end of the coil baseplate, and is driven by and connected with a motor driving wire of the controller; an output shaft of the stepping motor is connected with a worm through a shaft coupling device; the worm is meshed with a worm wheel; a shaft lever of the worm wheel penetrates through the coil baseplate and is connected with the inner coils of the clockwork coil mounted on the coil baseplate through a cap, the inner coils of the clockwork coil are connected simultaneously; the outer end of the clockwork coil penetrates through the coil baseplate and is connected with a power line of coil connecting lines; the controller is mounted on the coil baseplate; and the reminding device is connected onto the controller. Through the adoption of the structure of the adjustable wireless charging coil, the adjustment is convenient and fast, and the precision of the adjusting range is high.

Description

technical field [0001] The invention relates to the technical field of wireless charging, in particular to an adjustable wireless charging coil and a method for using the same. Background technique [0002] The technology for wireless charging mainly has the following four methods: electromagnetic induction method, radio wave method, magnetic resonance method and electric field coupling method. Among them, the magnetic resonance method was verified in 2007 by Marin Soljacic, a physicist at the Massachusetts Institute of Technology (MIT), and has received widespread attention since then. The technology utilizes the principle of resonance, which is the efficient transfer of energy between two objects vibrating at the same frequency. The magnetic resonance method can transmit charges in the air between the charger and the device, and the coil and capacitor form a resonance between the charger and the device to realize the technology of efficient power transmission. When two o...

AI Technical Summary

Problems solved by technology

However, due to the manufacturing process and other reasons, it is very difficult to design the resonant frequency of the transmitting and receiving coils to be the same in the system design in mass production, and the qualified rate of finished products is difficult to control, and the circuit itself, parasitic capacitance and external objects will all affect the resonant frequency of the coil changes, resulting in a decrease in charging efficiency and a waste of electric energy

[0003] In the coil design, the method of adjusting the coil resonance frequency can also be changed by adding inductance or capacitance to the circuit, or adding ferrite, metal sheets, etc. outside the coil to change the resonance frequency of the coil, but the above methods have no The quality factor of the coil may have a great impact, and it is not easy to complete in actual design and use, so it is generally not used

At present, when the output power is adjusted during the wireless charging process, the output power is generally controlled by adjusting the output voltage or the output frequency of the power supply, but there are also problems such as difficulty in adjusting the voltage or adjusting the output frequency of the power supply, and slow response.

[0004] The current wireless charging coil design has a fixed resonance frequency from the beginning, but due to manufacturing and design errors, often the two coils will not reach the optimal resonance point at the same time, and there are currently many difficulties in adjusting the resonance frequency of the coil during charging.

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