The material cost of the core electronic part is about ten yuan. The wireless charging system first selects the electromagnetic induction principle, and ends the energy transmission through the intermittent energy coupling of the coil. When the system works, the input end converts the AC mains power into DC power through the full bridge rectifier circuit, or directly uses the 24VDC power supply to the systemUnified power supply. After the output direct current passes through the power processing module, it is converted into high frequency alternating current through the 2M active crystal oscillator inverter to supply the primary side winding.
Wireless charging experience and time cost Compared to wired charging, wireless charging efficiency is about 60% to 70%, which means that the charging speed will be slower. Take the Samsung Galaxy S III as an example, using the Palm Pre touchstone kit, you need to patiently wait longer to charge after installation. The installation process includes removing the kit induction coil, welding the connection, installing it into the phone battery compartment and testing its working condition.
Wireless charging mode compositionBen, wireless charging adapter cost. According to the query of the digital home website, wireless charging module composition: wireless charging module accounts for about 15% of the total price of smart phones, and the cost of each link is expected to decline rapidly. Wireless charging adapter cost: Wireless charging adapter is an important part of wireless charging, the cost also affects the cost of the entire wireless charging system.
Bound: Wireless charging needs to be adsorbed on the charging base, and can not be moved at will, which is more restrictive to the user than the wired charge. High price: The principle of wireless charging is different, resulting in the cost of wireless chargers is usually higher than that of wired chargers. Low efficiency: Due to the low efficiency of wireless charging, under the same input power, the charging speed is slower than the line charging, especially the fast charging function of some brands.
Disadvantages of wireless charging efficiency is slightly lower: the general charger also has a transformer, but the wireless charging transformer composed of the transmitting coil and the receiving coil is limited in structure, and the energy transmission efficiency is theoretically slightly lower than that of the general charger. Slow charging speed: Due to the current mobile phone and other receiving devices, most limit the input power, so the charging speed is slow.
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 transmitting coil generates a certain current in the mobile phone receiving coil based on the alternating current of a certain frequency through electromagnetic induction, thus transferring the electrical energy from the transmitting end to the receiving end, and then starting to supply power to the mobile phone from the charging seat. Magnetic resonance.
Wireless charging principle is mainly electromagnetic induction and wireless electromagnetic wave technology. The principle of electromagnetic induction is the basis of wireless charging. When a magnetic field is generated between a charger and a mobile device, it'sIt generates electromagnetic induction. The alternating current generated at the charger end will create eddy currents in the magnetic field, and the receiving coil at the mobile device end will sense this eddy currents. In this way, power is transferred from the charger to the mobile device.
The basic principle of wireless charging is to convert the current into a magnetic field, which is transmitted through the air and then 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 primaryAvoid the trouble of inserting and removing cables. Application: Qi wireless charging technology is widely used in daily life.
2, small power wireless charging often uses electromagnetic induction, such as the Qi method of mobile phone charging, the primary coil of a certain frequency of alternating current, through electromagnetic induction in the secondary coil to produce a certain current, so as to transfer the energy from the transmission end to the receiving end. At present, the most common charging solution uses electromagnetic induction.
3, Qi wireless charging the use of electromagnetic induction principle for wireless charging equipment. Specifically, the charging base using Qi wireless charging technology and being chargedEach device is equipped with a conductive coil. The conductive coil in the charging base generates an electronic magnetic field after being energized. The conductive coil on the receiving device senses the magnetic field within a short distance and converts electrical energy to charge the receiving device. Qi wireless charging has two characteristics: ease and versatility.
1. The steps are as follows: First cut the end of the USB data cable connected to the mobile phone with scissors or a knife, and then cut the long end of the data cable into the incisionAt this time, you will see four green, red, white and black wires, cut the green and black two, and cut a small section of insulation in the red and green two, respectively, to reveal the copper wire.
2, open the back cover of the smartphone, and then take out the wireless charging receiver ready; Or the protective layer of double-sided tape peel; The next task is to connect the receiver's metal shock to the smartphone battery, which is the most difficult part of the process. However, as long as you are careful to ensure that each metal shock is connected together, it can be done.
3, hands-on transformation steps firstPrepare the wireless charging kit, including the battery compartment cover and the required tools. Weld cell cover contacts to test kit. Then, connect the welded wire to the phone charging pin to confirm the connection is correct. Then, carefully remove the induction coil, install it on the phone, weld the charging pin, and finally test whether the wireless charging function is displayed normally.
4, question 1: How to make wireless charger? There are many ways to use wireless chargers, mainly to see how the reception is installed. But no matter what the product is close, the operation method is placed on the launch plate. Take the mobile phone for example, the current mobile phone is generally plusA mobile phone jacket, inside this jacket is a wireless receiver module. The phone can be charged wirelessly with this jacket.
5, but there is no electricity, obviously the power generation in the video is fake. The winding of the coil in the video itself is wrong, because the two poles of the ring magnet are on the upper and lower planes, the magnetic field line is from one pole to the other pole, the coil plane in the video is parallel to the magnetic field line, there is no magnetic field line through the coil plane, which will generate current? At that time, I was puzzled by the results of the video, and now it is proved by experiments to be false, mysterious and boring.
6, likeThe original wifi and Bluetooth technology, wireless charging technology will fundamentally change people's mobile phone usage habits. Wireless charger is actually the use of electromagnetic induction principle for charging equipment, similar to a transformer, there is a coil at both ends of the sending and receiving, the sending end of the coil connected to the wired power supply to generate electromagnetic signals, the receiving end of the coil induction of the sending end of the electromagnetic signal to generate current to the electrical equipment.
2, Huawei's new work revealed: beyond Apple's smart charging board, only 799 yuan starting in Huawei's new product release in JulyAt the meeting, although products such as Huawei P50 series and MatePad Pro 16 stole the show, a mysterious new product was not ignored. This product is Huawei multi-device intelligent wireless charging board, it has been officially listed, the price is only 799 yuan.
3, Huawei multi-protocol super fast charge mobile power/charging bank features: rated capacity 5600mAh, input and output support fast charge, output up to 25W (need to match the original data cable, and the charged device itself supports 10V/25A), support small current mode, can be Huawei wristwatch, Bluetooth headset and other electronic devices for small electricityStream charging, 13 safety protection, about 220g.
4, the parameters of Yisea magnetic wireless charging stand are listed here, it supports a maximum of 15W wireless charging, and taking into account the needs of different devices, its 7mm internal also specially added a low power fixed frequency charging chip, can be intelligent switch between fast charging and trickling charging, through the filament coil, wireless charging for smart devices. The charging process is efficient and divided, and the heat is very low.