1, enamelled wire is 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 go to the surface of the wireTherefore, wireless charging coils generally use multi-strand enamelled wire to reduce impedance.
2, the breakdown voltage of the silk-covered wire is only a few hundred volts, the breakdown voltage of the enameled wire is several thousand volts, if the insulation is no problem, I think it is possible to exchange.
3, the transmitting end is often multiple strands of silk-covered wire, multiple strands of thinner enameled wire or gauze wrapped wire wound inductors are used in relatively high frequency circuits, 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.
4, winding transformerCommonly used materials are enameled wire, sandbag wire, silk-covered wire, the most commonly used enameled wire. The requirements for the wire are good conductive performance, sufficient heat resistance of the insulating paint layer, and certain corrosion resistance. As we use this Novo electrical equipment, the win-win transformer, all use high-strength polyester enamelled wire.
5, under specific operating frequency conditions, that type of wire produces a relatively small distributed capacitance, it is better to use that. This requires testing to make a correct judgment.
Simply put, the current is concentrated in the skin part of the conductor, so it is called the skin effect. The main reason for this effect is that the changing electromagnetic field creates a vortex electric field inside the conductor, which cancels out the original current. Obviously, in high-frequency applications, if only one wire is used because of its relatively small surface area, the current utilization rate will be greatly reduced, so that the wire heating is serious or the signal attenuation is increased, which is obviously what we do not want.
Slow charging speed: Due to the current mobile phone and other receiving devices, most limit the input power, so the charging speed is slow. High cost: The charger needs to have an electronic circuit to push the coil, and the electric device needs to have an electronic device to convert power, both need to have a coil, and need a high-frequency filter circuit to meet the electromagnetic compatibility, so the cost is higher than direct charging.
Wireless charger refers toA device that uses the principle of electromagnetic wave induction to charge is similar to a 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.
The same size. The same size and as close as possible, otherwise it will have no effect, low conversion efficiency.
1, wireless charging coil test requirements, such as 100 kHz/1V, where 1V refers to the excitation voltage, test frequency and supply voltage work together on the system, through the LCR tester analysis inductance, Q value and AC resistance. Coil design and production, silk-covered wire coil and multi-stranded wire coil are respectively used for the transmitting end, requiring low cost, simple process, suitable for conventional product applications.
2, the steps are as follows: first, cut the end of the USB data cable connected to the phone with scissors or a knife, and then the long end of the data cable to cut a small section of the incision, this time will beSee the green, red, white, and black wires, cut the green and black wires off, and cut the red and green wires off to reveal the copper wires.
3, the use of magnetic resonance technology principle, junior high school logistics textbooks have some knowledge, simply put: electricity generated magnetism, magnetic generated electricity! The magnetic field generated by the coil is then converted into electricity by the receiving coil, which is why this wireless charging device often carries a thick base and a "phone case".
4, wireless charging methods include electromagnetic induction, magnetic resonance, electric field coupling and radio wave transmissionWireless 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.
5, these two physical phenomena are used at the same time, you can carry out wireless charging. Current wireless charging devices all contain a "charging seat", which is actually a coil. When the charging seat is connected to the home plug, a magnetic field is generated around the coil due to the magnetic effect of the current. To charge the electronics, inside also