1, wireless charging PCB, different functions, the required components are different. The required components are: resistor, capacitor, resonant capacitor, resonant coil, MOS tube, control chip, protocol chip.
2, control chip: manage the entire wireless charging process, including voltage regulation, power control, communication and other functions. Power amplifier (PA) : Increases signal strength in order to transmit energy efficiently. Oscillators and modulators: Generate high-frequency exchanges for wireless transmissionStream signal. Coils: Used to generate or receive electromagnetic fields, are a key part of wireless charging.
3, the transmitting end is the wireless charger, the receiving end is the mobile phone. There is a coil at the transmitting end and a coil at the receiving end. The transmitting end transmits energy through the control board and coil, and the receiving end receives energy through the control board and coil, so that wireless charging can be achieved. The following picture shows the charging situation of Samsung S6 mobile phone and Polopai Technology's wireless charging mobile power supply. The mobile phone can start charging when it is placed on the wireless charger, without charging through the USB interface connection.
4, transformer and other electronicsComponents, after the reflow furnace high temperature heating, will form a mechanical connection between the components and the PCB board, thus forming PCBA. Tips: PCBA is the abbreviation of the English Printed Circuit Board Assembly, simply say that the PCB empty board through the SMT on the piece, and then through the DIP plug-in of the entire process, referred to as PCBA. In popular terms, PCB is a circuit board without components, and PCBA is a circuit board of welded electronic components.
5, connector: used to connect between the circuit board components. Fill: for groundThe copper coating of wire network can effectively reduce the impedance. Electrical boundary: Used to determine the size of the board, all components on the board can not exceed this boundary. Through holes, mounting holes, wires, components, connectors, filling, electrical boundaries, etc.
6, the useless end of K.cu should be connected to the high, or grounded, or defined as the output end, the integrated circuit should be connected to the power supply, the ground end, do not hang. l. The input end of the idle gate circuit should not be suspended. The positive input end of the idle op amp should be grounded, and the negative input end should be connected to the output end. m. Printed board as far as possible to use 45 fold line instead of 90 fold line clothLine to reduce the external transmission and coupling of high-frequency signals.
1, the principle is to convert environmental electromagnetic waves into current through the circuit to transmit current. This way the transmission distance is greater than 10 meters wireless resonant capacitor , suitable for long distance low power charging wireless resonant capacitor , and can also realize automatic charging anytime and anywhere. WiFi wireless charging. Mainly consists of two components, oneOne is a Wi-Fi access point (router), and the other is a custom charging sensor.
2, the basic principle of wireless charging is to convert the current into a magnetic field, and the magnetic field 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 output direct current is converted into high-frequency alternating current through the 2M active crystal oscillator inverter to supply the primary winding.
3, wireless charging system mainly uses the principle of electromagnetic induction. Wireless charger YesRefers 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 wireless charging resonant capacitor The latest wireless charging technology, through the use of the magnetic field generated between the coils, the magical transmission of electrical energy, inductive coupling technology will become a bridge connecting the charging base station and equipment.
4, the use of electromagnetic induction principle for charging equipment, the principle is similar to the transformer, through the transmitter and the receiving end set coils, the transmitter coil under the action of power to send electromagnetic signals, the receiving end coil to receive electromagnetic signals and turn the electromagnetic signalChange to current, so as to achieve the purpose of wireless charging.
5, if the use is vivo mobile phone, wireless charging is also known as inductive charging or non-contact inductive charging, based on the principle of electromagnetic induction, the device that needs to be charged can be charged by contacting the wireless charger after being energized.
6, wireless charging methods include electromagnetic induction, magnetic resonance, electric field coupling and radio wave transmission, wireless charging of mobile phones mostly uses the principle of electromagnetic induction. Electromagnetic induction wireless charging, when the current of the power supply through the coil (wireless charger's power supply coil) will generate a magnetic field, other unenergized lineWhen the coil (the charged coil on the phone) is close to the magnetic field, it generates an electric current, which charges the phone.
The reason why the wireless charging circuit should use LC output is as follows: The charging method of the wireless charger is to use the induced magnetic flux generated between the wireless charging board and the induction magnet on the mobile phone, and convert this magnetic force into a power for current transmission.
A device charged by electromagnetic wave induction, similar to a transformer.
The principle of wireless charging is the same as it, but it is the resonance of the magnetic field, by adding a capacitor to the coil at both ends to form an LC resonant circuit, when the resonant circuit at the transmitting end oscillates at a certain frequency, the resonant circuit at the receiving end will also produce the same frequency oscillation to generate induced electromotive force, and charge after rectification and filtering. Electrical energy is thus transferred by means of resonance between the two sides.
1. In this circuit, the resonant frequency of inductor L1 and capacitor C1 is setSet it at 1MHz. Because the circuit is in a resonant state, the no-load current is very small even if the receiving coil is not near the transmitting coil. At the receiving end, the resonance principle is also used to improve the efficiency of energy transmission. Schottky diode is used to rectify the signal, after filtering capacitor processing, to obtain direct current, and then charge the battery. In the best working condition, the charging current can reach more than 0.6A.
2, the resonant frequency of inductor L1 and capacitor C1 is 1MHz, because the circuit is resonant, so when the receiving coil is not near the transmitting coil, the no-load current is very small. The receiver also uses resonanceIn this way, the transmission efficiency of energy can be maximized, and the Schottky diode is rectified by filtering the capacitor to obtain direct current, directly charging the battery, and the charging current is above 0.6A. If the coil is made into a barrel shape, the transmission efficiency will be higher.
3, wireless charging coil A6 three 3 coil - inductance 15uH. Inductance basic formula and inductance definition formula: L=μ×Ae*N2/l. Where: L represents the inductance, μ represents the magnetic permeability of the magnetic core, Ae represents the cross-sectional area of the magnetic core, N represents the number of turns of the coil, and lm indicates the magnetic circuit length of the magnetic core. Empirical formula: L= (k*μ0*μs*N2*S) /l. Among them. μ0 is the vacuum permeability =4π*10 (-7).
4, if the use is vivo mobile phone, wireless charging is also known as inductive charging or non-contact inductive charging, based on the principle of electromagnetic induction, the device that needs to be charged can be charged by contacting the wireless charger after being energized.
5, through the two inductors, the energy can be coupled to the transmission, the secondary coil received by the alternating current through the receiving conversion circuit, it is converted into direct current, directly for the battery charging. In addition to electromagnetic induction, capacitive coupling mode is also a common wireless chargingElectrical mode. In this mode, no inductor is required, but the electric field of the capacitor is used for energy exchange to achieve wireless charging.
2, the basic principle of wireless charging is to convert the current into a magnetic field, and the magnetic field 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 the power management module output direct current through 2M active crystal inverter converted into high-frequency AC power supply primaryThe winding.
3, wireless charging system mainly uses 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.
4, the use of electromagnetic induction principle for charging equipment, the principle is similar to the transformer, through the transmitter and receiver end set coil, transmitter coil under the action of power to send electromagnetic signals to the outside, the receiving end coil receivedCommercial explosion: Green link desktop wireless charger deep disassembly '>49 yuan e-commerce explosion: Green Link desktop wireless charger deep disassembly
Recently, Green Union launched a popular desktop wireless charger (model CD186), Apple Android universal, support 5W and Apple 5W, Samsung 10W wireless fast charge, the key is the price of only 49 yuan, cost performance can be said to crush the market similar 99 yuan products. In order to understand the workmanship of this product, the next thing to bring you is its unpacking.