Specifically, the wireless charging device mainly includes two parts: the transmitter and the receiver. The transmitter generates a high-frequency alternating magnetic field through a built-in coil, and the receiver is built inThe coil receives the magnetic field energy and converts it into electricity, thus charging the phone. Although mobile phone wireless charging is called "wireless", in fact, the phone still needs to be in contact with the charging device, because electromagnetic induction technology requires a short distance of physical contact to transfer electricity.
Convenient: no need to connect with a wire when charging, 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 less efficient: there is also a transformer in the general charger, but the transformer composed of wireless charging and transmitting coil and receiving coil is limited in structure.The energy transfer efficiency is theoretically slightly lower than the average charger.
Basic principle Qi is based on the principle of electromagnetic induction for power transmission. The basic principle of an inductively coupled power transfer system is shown in Figure 1. The system consists of a transmitter coil L1 and a receiver coil L2, which together form an electromagnetic coupling inductor. The alternating current carried by the transmitter coil generates a magnetic field and induces a voltage in the receiver coil by induction. This voltage can be used to power a mobile device or charge a battery.
Wireless charging equipment mainly includes two parts: transmitter and receiver. The transmitter passes through a built-in coilA high-frequency alternating magnetic field is generated, and when the phone is placed on the charger, this magnetic field senses the coil inside the phone. There is a coil under the back cover of the mobile phone, when the alternating magnetic field generated by the charger acts on this coil, it will generate an induced current inside the mobile phone, so as to realize the charging of the mobile phone.
How Guitar pickups work Over the past few years, "active" pickups have become increasingly popular, and electret "acoustic" pickups are starting to catch up. However, about 95% of regular guitars still use pure magnetic pickups - which we'll describe here.Can not, too much increase the voltage or increase the number of turns will burn the battery, because the more you turn the higher the voltage, I do not know whether your self-made charger is Qi program, if it is Qi, it is not possible, this willYou need close contact, you need to switch to radio, within five meters.
In the range of ravg 0~0.08 m, the output power increases first and then decreases with the increase of coil turns; 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.
is the greater the inductance. The larger the wire diameter, the smaller the resistance. These are designed to reduce the current if you increase it.
The five-horse wireless charging module requires 10v power. Wireless charging module parameters 5W6mm85%-20C80C, 95% coil single wire tightly wound coil turns 10T10W6mm Input voltage DC5V-9V5~2A Output voltage 5V-9V Charging current 10v power.
1, the number of wireless charging coils is based on the charging deviceThe number and size of the devices to be charged depends. In theory, the more coils there are, the more efficiently the device can be charged, because the device can receive the charge at any location. However, if the number of coils is too large, it will increase the cost and volume, which is not practical or economical. Therefore, the appropriate number of coils should be selected according to different charging needs.
2, no. Each wireless charging coil will have a certain amount of energy loss, increasing the number of coils will lead to a decrease in the overall charging efficiency, more coils will increase the energy loss and mutual interference, thus reducing the efficiency of wireless charging; And increasing the number of coils needs to be in the deviceInstalling more coils and associated circuits increases design complexity and cost.
3, magnetic resonance charging, the principle is the same as the resonance principle of sound. Coils of the same vibration frequency arranged in a magnetic field can exchange energy with each other. If the coil is large enough, long-distance transmission is also possible, but high efficiency, miniaturization is more difficult.
4, is the greater the inductance. The larger the wire diameter, the smaller the resistance. These are designed to reduce the current if you increase it.
5, according to the principles of physics, the stronger the electromagnetic coil will emit the stronger the magnetic field, and then follow the handThe reception of the machine is also related, the stronger the magnetic field, the stronger the charging ability will be.
6, wireless charging base to increase the coil, or do not modify it, you increase the coil not only did not play a good effect but affect the speed of charging, increase the coil is equal to increase the resistance, it will make the current slow, the coil is proportionally wound, too much or too little can not, coil wound less, there will be damage to the parts, resulting in parts burned spark, For some do not arbitrarily modify the wireless charging base.
Mobile phone wireless charging refers to the meaning that the charger and the electrical device can be connected to the phone without wires.
Wireless charging, also known as inductive charging or non-contact inductive charging, based on the principle of electromagnetic induction, it is not necessary to transmit electricity to the device like the traditional wired charger, but the device that needs to be charged can be charged by contacting the wireless charging base. More use doubts can enter vivo official website -- my -- online customer service -- input labor, consult online customer service feedback.
Wireless charging, also known as inductive charging, non-contact inductive chargingIt is the use of near-field induction, that is, inductive coupling, by the power supply device (charger) to transmit energy to the device that uses electricity. If the distance between the charger and the electrical device is far, it is necessary to use resonant inductive coupling design.
Wireless charging, also known as inductive charging, non-contact inductive charging, from wireless power transmission technology, is the use of near-field induction, that is, inductive coupling, by the power supply device (charger) to transmit energy to the power device, the device uses the received energy to charge the battery, and at the same time for its own operation.