What are the components of wireless charging? On the leftThe side is TX, that is, the transmitter, and the corresponding product is the wireless charging transmitter. On the right is Rx, that is, the receiving end, and the corresponding product is a mobile phone with wireless charging function. TX end: MCU, power full bridge, and LC resonant Tank composed of inductors and capacitors, where the inductor is the transmitting end coil.
This circuit diagram uses the chip sl1052 as the control, the structure is simple and the function is complete. Pin function 1 Power end. 2 Temperature monitoring input. 3 Charging status indicator. 4 Grounding terminal. 5 Adjust the tube driver. With the base of the external regulating tube. 6 Charging Control. 7 Current sampling input. The charging current is determined by the voltage difference between the power supply and this pin.
Mobile phone wireless charging system mainly adopts the principle of electromagnetic induction, energy coupling through the coil to achieve energy transfer. 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. Wireless charging technology is a special way of power supply, it does not need the power line, rely on electromagnetic wave propagation, and then the electromagnetic wave energy into electricity, and finally achieve wireless charging.
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 coil (mobile phone side of the electric coil) close to the magnetic field will generate current, charging the mobile phone.
field-coupled wireless charging does not use a coil for electromagnetic induction, but directly through the electricity formed between the charging base and the electrical device to be chargedThe high-frequency electric field in the capacitor, that is, the induction electric field generated by coupling two sets of asymmetric dipoles in the vertical direction, transmits power, which has the advantages of low cost and low alignment requirements. But there are not many actual products.
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. The advantages of wireless charging safety: no power contact design, can avoid the danger of electric shock.
Composition of wireless charging: Usually, oneA wireless charger includes a transmitting 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.
Main features From the theory, wireless charging technology, safe and harmless to the human body, wireless charging uses the resonance principle is magnetic field resonance, only in the same frequency resonance between the coil transmission, and other installedIn addition, the magnetic field used by wireless charging technology is itself harmless to the human body.
skin "pathway. By comparison, it can also be seen that the heat output of a high-frequency transformer with the same power and volume is much larger than that of a multi-strand enamelled hoff winding. Wireless charging frequency 100KHZ-200KHZ The receiving end often has a single strand, 2 strands, 4 strands, there are also 8 strands, 13 strands of hot air lines, considering the thickness, the receiving end is side-by-side, unlike the transmitting end twisted together, 13 strands side-by-side winding is very difficult.
Wireless charger refers to the use of electricityThe principle of magnetic wave induction charging device, the principle is similar to the transformer. There is a coil in the sending end and the receiving end. The sending end coil is connected to the wired power supply to generate an electromagnetic signal, and the receiving end coil senses the electromagnetic signal of the sending end to generate a current to charge the battery. The wireless charging system mainly uses the electromagnetic induction principle, and the energy transmission is completed through the continuous energy coupling of the coil.
1, BYSI BYsi is a domestic electronic digital product accessories brand iwatchcoil, founded in 2010, belongs to Shenzhen Shishang Chuangzhan Technology Co., LTD. The brand's main products are data cable, charger, charging bank, mobile phone shell, adapter and docking dock, mobile phone bracket and so on. Pinsheng Pinsheng has a strong iwatch wireless coil R & D team and a good iwatch wireless coil reputation, and its market share has been among the best.
2, mobile power iwatcoil : Mobile power supplies directly power or charge electronic products through the DC power interface, usually by lithium batteries or dry batteries as energy storage units. Unlike the device's built-in battery, it can provide additional power for devices such as phones, laptops, and digital cameras. Computer accessories: including DVD, COMBO, CD-ROM, CD-RW, DVD burner, power adapter, keyboard, mouse, floppy drive, and expansion dock and docking accessories.
3, mobile power supply: mobile power supply can be directly matched through the DC power input interface of electronic productsProduct power supply or charging, generally by the lithium cell or this dry battery as a storage unit. Different from the battery in the product. It can replenish the power of mobile phones, laptops, digital cameras and other devices.
4, electronic products include TV sets, refrigerators, air conditioners, digital cameras, dynamic memory, mobile phones.
5, digital peripheral products include a variety of types, mainly the following categories: digital accessories Such products are mainly for the digital equipment to provide additional functions and protection, such as chargers, mobile power, data cables, memory cards and so on. The charger provides power to the device, and the mobile power supply can be500 high frequency Level 4 words to help you easily cope with the challenge before the test.
CET-4 English vocabulary about 3500. Level 4 vocabulary is about 3500, the high frequency words are about 1000, and in essence, there are super class words, so there are about 4000 words in level 4, and the vocabulary required to master is about 3800. The difference between CET-4 vocabulary and CET-4 vocabulary is that CET-4 is to investigate new words, mainly relying on the accumulation of vocabulary, while CET-4 is mainly to investigate the new meaning of familiar words in vocabulary.
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