electric field coupling wireless charging, does not use the coil for electromagnetic induction, but directly through the charging base and the capacitor formed between the electrical device to be charged in the high frequency electric field, that is, the use of the induction electric field generated by coupling two sets of asymmetric dipoles along the vertical direction to transmit power, this charging method has the advantages of low cost and low alignment requirements. But there are not many actual products.
The transmitting end is often multiple strands of silk-covered wire, multiple strands of finer enamelsInductors wound by wire or gauze wire are often used in circuits with relatively high frequency, such as the magnetic antenna rod coil of the radio, the short-wave radio coil, the high-frequency transformer coil of the liquid crystal display lighting circuit, etc., often use multiple strands of wire and wound.
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.
K. Punch throughUnique coil solutions address these challenges: Thickness reduction -AKS 'patent-pending dual coil design reduces component thickness, including the protective cover, to 0. 3 mm. Reduce heat -AKS charging coils have the industry's lowest resistance to help reduce the device's temperature while charging. Lower cost AKS's highly scalable manufacturing process minimizes the impact of wireless charging coil prices on material costs.
Enamelled wire good. Due to the skin effect of the high-frequency signal in the wire, it means that the high-frequency current in the wire will gather to the surface of the wire, so the wireless charging coil 18mm, different mobile phone models will be different, wireless charging receiving coil is to accept the current emitted by the wireless charging transmitting coil, when the transmitting coil emits the current, the receiving coil receives the emitted current to the current storage end.
[Pacific Automotive network] BMW 5 series wireless charging power is 2 kilowatts, the coil pad size of the floor is roughly 35 inches long, 35 inches wide, 4 inches thick, the car chassis coil pad is roughly 18 inches square, 0.8 inches thick, the floor pad must be inserted into the 220V socket.
Single coil: A11 Wireless charging coil specification , A11a Wireless charging coil specification , MP-A2; 2) Multi-coil: A28 A28, MP-A13. Single coil multi-coil Qi certification can be divided into the following three categories according to the product: 1) charger products; 2) Mobile power supply products; 3) Embedded devices (productionProduct contains TX emission function).
QI certification is not mandatory, but Qi certification is also very important, and products using Qi standards must be rigorously tested to ensure their safety, interoperability and energy efficiency. Only products that have passed independent laboratory testing can use the Qi mark and are considered to be "Qi certified" products.
QI-BPP certification: The product supports less than 5W power, the use of Qi protocol, must be BPP certification. Qi-epp certification: The product supports more than 5W power, the use of Qi protocol, must be EPP certification. Qi-PPDE Certification: Products support more than 5W power, use Samsung private protocol PPDE, must be tested by PPDE (starting from July 1, 2019).
Wireless charging Qi certification types can be divided into three categories: BPP certification, EPP certification and PPDE certification. 1) QI-BPP certification: The product supports less than 5W power, the use of Qi protocol, must be BPP certification. 2) QI-EPP certification: The product supports more than 5W power, the use of Qi protocol, must be EPP certification. 3) Qi-PPDE certification: The product supports more than 5W power, so thatTo use the Samsung private protocol PPDE, you must pass the PPDE test (starting from July 1, 2019).
Wireless Qi certification content: including Compliance test (Compliance test) and compatibility test (Interoperability Test). The compliance Test was conducted by the Authorized Test Lab (ATL) with 5 samples.
Qi certification test content Detailed Qi certification test content is rigorous and comprehensive, mainly including: transmitter and receiverThe communication protocol of the device: to ensure that the two sides can exchange data quickly and accurately. Power output and stability: In the XYZ axis translation test, verify the wireless charging capability of the device at different angles. Energy transmission limit: Test the maximum power supply capacity of the equipment to ensure safety performance.
The four models of iPhone13 all support MagSafe magnetic wireless charging, and the maximum support is 15W magnetic wireless charging. In addition, for the most commonly used Qi wireless charging standard alsoIs compatible and supports up to Qi5W wireless charging. All iPhone13 models support wireless charging, and the power is 15W.
Expand all Apple 13 supports up to 20W wired fast charge and 15W MagSafe wireless charging. The Apple 13's fast charge feature enables users to quickly charge their phones through 20W wired fast charge, while also supporting MagSafe wireless charging technology up to 15W, providing users with flexible charging options. When using 20W fast charge, you must be equipped with an official fast charge head, and the phone will automatically adjust the charging speed after the battery reaches 80%To protect battery health and ensure long-term reliability.
The iphone13 wireless charger is 15W. The iPhone13 supports up to 20W cable charging, MagSafe wireless charging (up to 15 watts), and Qi wireless charging (up to 5 watts).
1, wide impedance range Wireless charging coil specifications , to meet a variety of needs of wireless charging lineCoil wireless charging coil specification inductance is usually in the micro hen level, the test frequency is in the kHz range, which requires a wide and accurate measurement range. The E4980A/AL wireless charging coil specification has a wide impedance range from 4 milliohm to 100 milliohm, covering this frequency band with an accuracy of 10%, making it particularly suitable for the precise evaluation of wireless charging coils.
2, in the range of ravg 0~ 0.08m, the output power increases first and then decreases with the increase of the number of coil turns Wireless charging coil specifications ; In the range of ravg 0.08~ 0.4m, the output power decreases first and then increases and then decreases with the increase of coil turns. For a fixed operating frequency, the quality factor Q mainly depends on the shape and size of the coil and the material used. Standard coil technologies (such as wire winding coils and PCB coils) generally specify quality factor values.
3, mobile phone wireless charger is probably the diameter of the mobile phone end coil about 50mm, the diameter of the charger end is about 46 to 48mm, because of different mobile phone models may be different,However, the best transmission method is that the phone and the charging end of the coil size is the same.
4, Wireless charging is also known as wireless Power supply WPT (Wireless Power Transmission), is a coupled electromagnetic field as the medium to achieve electrical energy transmission. For electric vehicles, wireless charging is mainly through the power supply coil arranged on the ground and the electric coil at the bottom of the vehicle, and the magnetic resonance generated between the coils replaces the traditional power lines to charge the vehicle. This charging method requires higher spacing between the supply and receiving coils.
5, to 48mm. Wireless charging receiver coilThe minimum size is 46 to 48mm, different mobile phone models will be different, wireless charging receiving coil is to accept the current emitted by the wireless charging transmitting coil, when the transmitting coil emits the current, the receiving coil receives the emitted current to the current storage end.
1, mobile phone wireless charger is probably the diameter of the mobile phone end coil about 50mm, the diameter of the charger end is about 46 to 48mm, because of different mobile phone models may be differentNo, but the best transmission method is that the phone end and the charging end coil size is the same.
2, to 48mm. The minimum size of wireless charging receiving coil is 46 to 48mm, different mobile phone models will be different, wireless charging receiving coil is to accept the current emitted by the wireless charging transmitting coil, when the transmitting coil emits the current, the receiving coil receives the emitted current to the current storage end.
3, the line diameter of.51. The coil diameter of the motor of new energy vehicles is 0.51, and the characteristics of different forms of motors are not the same. New energy vehicles refer to the use of unconventional vehicle fuelsAs a power source (or the use of conventional vehicle fuel, the use of new on-board power devices), the integration of the advanced technology of vehicle power control and drive, the formation of advanced technical principles, with new technology, new structure of the car.
4, the working principle of the wireless charger: the principle of electromagnetic induction, through the coil for energy coupling 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. After the power management module output direct current through 2M active crystal inverter converted into high-frequency AC power supplyStage winding.
5, convenient: charging does not need to be connected with wires, as long as it is placed near the charger, there is no need to occupy multiple power sockets, there is no trouble of multiple wires winding each other. The disadvantages of wireless charging are slightly lower in efficiency: 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.