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, or24V DC terminal is used to supply power directly to the system. 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.
Wireless charging methods include electromagnetic induction, magnetic resonance, electric field coupling and radio wave transmission, etc. 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 coil (mobile phone side of the electric coil) close to the magnetic field will generate current, charging the mobile phone. As shown below.
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. 2, low charging efficiency: compared with wired charging, wireless charging efficiency is low. That means it takes longer for users to fully charge. In addition, since wireless charging requires energy conversion between transmit and receive, it may lead to reduced battery life. Slow charging speed: due to wireless chargingThe efficiency of electricity is low, so the charging speed is relatively slow. This causes users to have to wait longer to complete the charge. 3, magnetic resonance wireless charging technology is a new way of charging, it transmits energy through the magnetic field, without the use of traditional wired charging equipment. Although this technique has certain advantages, it also has some disadvantages. The conversion efficiency of low-efficiency magnetic resonance wireless charging technology is generally only about 70%, which is low compared with wired charging. 4, the efficiency is slightly lower: the general charger also has a transformer, but the wireless charging is composed of a transmitter coil and a receiver coilBecause the device is limited in structure, the efficiency of energy transmission is theoretically lower than that of a general charger. Slow charging speed: Because most of the current receiving products such as mobile phones limit the input power, the charging speed is relatively slow. 5, convenience: non-contact, one-to-many charging compared with the general charger, reduce the trouble of plugging, but also avoid the interface is not applicable, poor contact and other phenomenon, the elderly can also be very convenient to use. (2) Versatility: a charger can charge multiple loads, and a family can buy a charger to meet the needs of the whole family. 1, traditional wireless charging solutions: In general, the traditional way of charging is to use electromagnetic induction to complete. That is to say, when the current flows through the charging coil of the charger, a corresponding magnetic field will be generated. The receiving coil in the mobile phone can generate current by sensing changes in the magnetic field, thus realizing wireless mobile phone charging. This charging method is indeed more convenient, at least to solve the problem of charging line loss, but also save a lot of moneyThe space of... 2, MOTOROLA built a breakthrough system based on Qi technology, it not only makes charging wireless, even in the pocket can also automatically recharge in the background. However, this technology requires extremely high spatial accuracy, and any object that intervenes will interrupt the charge. To address this challenge, MOTOROLA joined forces with GuRu, an innovative company focused on improving charging efficiency. 3, wireless charging sounds great in theory, but it is just more convenient than wired charging. You insert the puck or stand on the wall with a wire, and then place the device on the puck. nowMOTOROLA said it would partner with Guru Wireless to move away from tablets and go truly wireless. Well, it's almost real wireless. Guru Wireless refers to its technology as OTA (over-the-air) wireless. What's new about the wireless charging solution proposed by Guru?