Mobile phone wireless charging constant current transmission system

Abstract

The mobile phone wireless charging constant current transmitting system of the present invention belongs to the technical field of electronic equipment. Its structure includes a power management circuit (1), an energy transmission bridge (3), a bridge drive circuit (7), and a control sequence generation circuit (8), and is characterized in that the structure also includes a voltage regulation circuit (2), a current detection circuit An amplifier circuit (4), a signal shaping circuit (5), an output automatic control circuit (6), and a reference voltage circuit (9). The invention can automatically adjust the working voltage of the energy transmitting circuit, so that the transmitting system always works at the best voltage, and the system has the characteristics of safety, reliability, and convenient use.

Description

Mobile phone wireless charging constant current transmitter system technical field [0001] The present invention belongs to the technical field of electronic equipment. In particular, it relates to a constant current transmitter system for wireless charging of mobile phones system. Background technique [0002] Since electric power enters human life, wires are almost ubiquitous as a medium for transmitting electric energy, which is the basis for our life. Bring a lot of convenience. However, the wired energy transmission method is limited by space occupation and potential safety hazards brought by the contact of electrical equipment. problems, etc. However, there is no direct electrical connection in the wireless energy transmission system, which can realize the wireless device without space limitation. Energy supply, and has the advantages of no connection link, no exposed conductor, no leakage and electric shock danger. There is no doubt that mobile phone charging...

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned patents also have certain shortcomings: the core high-frequency inverter circuit uses a fixed voltage for power supply, and the equivalent impedance reflected from the receiving end to the transmitting system is ever-changing. When the reflected impedance becomes small, it will cause inverter current. increase, thus posing a threat to the system or even causing damage, on the contrary, when the reflection impedance becomes larger, it will cause the inverter current to decrease, causing the charging power to be too small and slow down the charging speed

On the other hand, the system will not automatically stop transmitting energy when the load disappears completely (such as fully charging or removing the charging device). According to the theory of mutual inductance coupling, the transmitting system will instead transmit energy at the maximum power, resulting in energy loss and system damage.

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