Electronic circuit used for wireless charging system, and system

Abstract

An electronic circuit used for a wireless charging system is disclosed. The electronic circuit is characterized by comprising an emitting switch (MOS90), a protection diode (D90), a high-pass filtering capacitor (C92), a sampling terminal (P98), a voltage-regulator tube (D92), a half-wave rectification diode (D91), a sampling resistor (R91), a sampling capacitor (C91), a rectifier bridge (BT1), an electric energy receiving switch (MOS92), an inverter (T92), a selector switch (MOS93), a coil (L2), a power supply point (VCC9), a ground terminal (GND 9), an emitting control point (P90), an electric energy receiving point (S92), a switching control point (P93), a sampling output point (S91), a single chip microcomputer (PIC12F510-2), a rechargeable battery (BAT), a low-pass filtering inductor (L99) and a power supply output capacitor (C98). A controllable capacitor (CS92) is added on the basis of the technical scheme. A system is additionally provided with a control program on the basis of the technical scheme. The electronic circuit is low in cost, flexible in use, long in service life and can realize mutual electric energy and information transmission.

Description

technical field [0001] The invention belongs to the field of electricity, and relates to an electronic circuit and a system for a wireless charging system. Background technique [0002] Wireless charging technology is a technology that utilizes magnetic resonance, electromagnetic resonance or electromagnetic induction to realize power transmission without wires; the cost of wireless charging products in the prior art is high and there is room for reduction; the wireless charging products in the prior art can realize There are very few products that transmit power between devices with batteries (that is, devices that can be powered by their own rechargeable batteries), and products that can transmit power between devices with batteries and transmit information through their coils Fewer, there is a need for further development. [0003] The cost of existing wireless charging products is very high, especially the price of the charging board is expensive, which is often more th...

AI Technical Summary

Problems solved by technology

[0003] The cost of existing wireless charging products is very high, especially the price of the charging board is expensive, which is often more than 100 yuan, which has a negative effect on the further promotion and development of wireless charging technology. If a lower-cost wireless charging product can be developed, it will benefit wireless Further promotion and development of charging technology

[0004] After searching the patent database, the inventor found that the invention patent with the application number 201410065211.3 named "a wireless charging and discharging circuit, terminal equipment and wireless discharging method" is the technology closest to the present invention. Due to the design restrictions of the 201410065211.3 patent ( or limit of thinking), the inventor has adopted two relays with two branches to switch the connection between the receiving circuit and the transmitting circuit to the coil, so as to realize the sharing of a coil between the transmitting circuit and the receiving circuit; the relay is used as an electronic switch in many Among the electronic components, they are expensive and fragile components, with short life and high price, and there is room for improvement

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