This article to talk about wireless charging transmission circuit analysis, as well as wireless charging transmitter circuit diagram corresponding knowledge points, I hope to help you, do not forget to collect the site oh. < / p > < h2 > the article directory list: < / h2 > < ul > < li style = 'margin - bottom: 3 px; list-style: none'>1, How does wireless charging work for mobile phones?
Principle of wireless charging: electromagnetic induction. The charging base and the mobile phone terminal have built-in coils respectively. When the two are close, the generating coil generates a certain current in the mobile phone receiving coil based on a certain frequency of alternating current through electromagnetic induction, thereby transferring the point energy from the originating end to the receiving end, and then starting to supply power to the mobile phone from the charging seat. Magnetic resonance.
Electromagnetic induction wireless charging: This way of charging is to use the inductive magnetic flux generated between a wireless charging board and the induction magnet on the mobile phone, and convert this magnetic force into an electric powerTransmission of line current.
Wireless charging system mainly adopts the principle of electromagnetic induction. Wireless charger refers to the charger that does not need to be connected to the terminal device that needs to be charged without the traditional charging power cord, using the latest wireless charging technology, through the use of the magnetic field generated between the coils, the magic transmission of electrical energy, inductive coupling technology will become a bridge connecting the charging base station and equipment.
Wireless charging, also known as inductive charging, non-contact inductive charging, from wireless power transmission technology, is the use of near-field induction, that is, inductive coupling, by the power supply equipment (charger) to transmit energy to the device that uses electricityThe device uses the received energy to charge the battery and at the same time for its own operation.
Wireless charging, also known as inductive charging or non-contact inductive charging, based on the principle of electromagnetic induction, it is not necessary to transmit electricity to the device like the traditional wired charger, but the device that needs to be charged can be charged by contacting the wireless charging base.
The principle of mobile phone wireless charging is to use electromagnetic induction technology to transfer electric energy through the magnetic field in the air to the inside of the mobile phone, so as to realize the charging of the mobile phone. Specifically, wireless charging devices mainly include two parts: transmitter and receiver.The transmitter generates a high-frequency alternating magnetic field through a built-in coil, and the coil inside the receiver receives the magnetic field energy and converts it into electricity, thus charging the phone.
1, the basic principle of wireless charging is to convert the current into a magnetic field, which is transmitted through the air and converted into a current to be transmitted to the intelligent terminal. When the system works, the input end converts the AC mains into direct current through the full bridge rectifier circuit, or uses the 24V direct current end to supply power to the system directly. After passing through the power management module, the DC output passes 2MThe active crystal oscillator is converted into high frequency alternating current to supply the primary winding. 2, wireless charging is also known as inductive charging or non-contact inductive charging, based on the principle of electromagnetic induction, it is not necessary to transmit electricity to the device like the traditional wired charger, but the device that needs to be charged can be charged by contacting the wireless charging base.
3, wireless charging principle: electromagnetic induction. The charging base and the mobile phone terminal are respectively built with coils. When the two are close, the coil generates a certain current in the mobile phone receiving coil based on a certain frequency of alternating current through electromagnetic induction, so as to transfer the point energy from the originating endConvert this magnetic force into an electric power for the transmission of electric currents.
A device charged by electromagnetic wave induction, similar to a transformer.
In power systems, this principle allows two LC oscillating circuits to be coupled to each other at the resonant frequency, thus achieving the transfer of energy. This principle applies not only to wireless charging, but also to the transmission of information on radios and mobile phones. Specific to the working principle of wireless charging, first of all, the mains is processed by transformer step-down and rectification filter, which is converted into about 21V DC voltage as the main power supply.
1, the composition of wireless charging: Usually, a wireless charger contains a transmitter coil, a receiving coil, a control circuit and a power supply. The transmitting coil and the receiving coil are the core components of wireless charging, and they achieve energy transmission through electromagnetic induction. The control circuit is used to adjust the transmitted and received power to achieve stable and efficient energy conversion. The power supply provides energy for the entire system. Power transmission path: Wireless charging achieves energy transmission through electromagnetic induction.
2,The MCU controls the transmitted energy by controlling three signals: Input voltage power Switching frequency of the full bridge power input duty cycle of the full bridge Note: Why can you control the transmitted energy by controlling these three signals? The Vooda School will explain it later. The communication mechanism of wireless charging is what conveys the essence of information is to make the signal change. Like when I wave to you and you see my hand changing, you know I'm calling you.
3, the audio noise problem of wireless charging often troubles users, especially in a quiet environment, such as when the bedside is used, the abrupt "sudden-sudden-sudden-sudden" sound may hitDisturb sleep. This noise mainly comes from the ceramic patch capacitor in the circuit system, and the piezoelectric effect generated by it causes the capacitor to deform when the electric field changes and causes mechanical vibration, which is converted into noise.
This is the end of the introduction of wireless charging and transmitting circuit analysis and wireless charging transmitter circuit diagram, do not know you find the information you need? If you want to know more about this, remember to follow this site. < / p >