1. HMM? Wireless charging has already had practical applications, ah, 18 years Apple has wireless charging mobile phones. (The following content is extracted from other pages) At present, wireless charging mainly has electromagnetic induction, magnetic field resonance and radio waves. Electromagnetic induction technology is widely used because of its higher charging efficiency and simpler circuit structureWhat technologies are used?
Science and technology. Wireless charging technology (Wirelesschargingtechnology; Wirelesschargetechnology, derived from wireless power delivery technology.
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.
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.
Technology that uses magnets to charge devices. Wireless charging technology, derived from wireless power delivery technology, uses magnetic resonance to transfer charge, coil and electricity in the air between the charger and the deviceThe container forms a resonance between the charger and the device to achieve efficient transmission of electrical energy.
Durable: the power transmission element is not exposed, so it will not be eroded by moisture and oxygen in the air; There is no contact, so there is no loss caused by mechanical wear and flaring during connection and separation. Convenient: there is no need to connect with wires when charging, as long as it is placed near the charger, there is no need to occupy multiple power sockets, and there is no trouble of multiple wires winding each other.
Now the wireless charging is more common magnetic resonance charging mode. Using the principle of magnetic resonance technology, junior high school logistics textbooks areSome knowledge, simply put: electricity generates magnetism, magnetism generates 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".
1, the working principle of the wireless charger: 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 24V DCThe electrical end directly supplies power 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.
2, wireless charging methods are 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.
3, wireless chargingAlso known as inductive charging, non-contact inductive charging, derived 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.
4, the principle of wireless charging is mainly electromagnetic induction and wireless electromagnetic wave technology. The principle of electromagnetic induction is the basis of wireless charging. Electromagnetic induction occurs when a magnetic field is generated between a charger and a mobile device. The alternating current generated at the charger end will form eddy currents in the magnetic field, andThe receiving coil on the mobile device senses this eddy current. In this way, power is transferred from the charger to the mobile device.