Low-power wireless power supply system

Abstract

Disclosed in the invention is a low-power wireless power supply system comprising a power supply, an inverter circuit, a detection circuit, a control circuit, a transmission circuit, a receiving circuit and a load circuit. The power supply is connected with the inverter circuit connected with the transmission circuit; the power supply and the transmission circuit are connected with the detection circuit connected with the control circuit; and the control circuit is connected with the inverter circuit in a controlling mode. The receiving circuit receives a magnetic field of the transmission circuit and a direct-current power supply is obtained after changing. The load circuit absorbs and consumes the electric energy of the receiving circuit. The transmission circuit is a parallel resonance circuit formed by a capacitor and an inductor; and the parallel resonance circuit is connected with a switching tube S, thereby realizing controlling of connection or disconnection of the parallel resonance circuit. The receiving circuit is an LCC resonance receiving circuit formed by two capacitors and an inductor; and rectification and filtering are carried out by a D0 and a C3. Compared with the prior art, the provided system has the following beneficial effects: the power consumption is reduced; the dynamic response characteristic is improved; and the transmission efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of wireless charging, and in particular relates to a low-power wireless power supply system. Background technique [0002] Wireless charging technology is a technology that uses magnetic fields to charge devices without using wires at all. Wireless charging technology, derived from wireless power transmission technology, uses magnetic resonance to transmit charges in the air between the charger and the device, and coils and capacitors form resonance between the charger and the device to achieve efficient power transmission technology. [0003] Since the transmission of electric waves has nothing to do with the charging interface of the device, once the wireless power supply technology is popularized, not only will the electronic products not be bound by sockets and cables, power supply and charging will be more convenient, but also it will make different brands and different interfaces of electrical applianc...

AI Technical Summary

Problems solved by technology

However, most of the existing equipment is powered by low-voltage DC adapter power supply (that is, the front-end of the wireless power supply device is converted into a low-voltage DC adapter), and the power is generally small (Qi standard is 5w), and it is mainly designed for a certain type of product. (e.g. mobile phones), limited range of use

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