Wireless Charging Technology
Wireless Charging Technology

Wireless charging technology, derived from wireless power transmission technology, using magnetic resonance in chargers and devices.The transfer of charge between the air, the coil and the capacitor form a resonance between the charger and the device, achieving high power Effective transmission technology.For more information, please pay close attention to JackTelecom.(www.jacktelecom.com).



Using the "resonance" principle of physics - two objects with the same vibration frequency can efficiently transfer energy.

1. The electrical energy in the transmission line is transmitted to an antenna made of copper.
2. The antenna vibrates at a wavelength of 10 MHz to generate electromagnetic waves.
3. The energy emitted by the antenna propagates to 2 meters (6.5 feet).
4. A laptop that also vibrates at a frequency of 10 MHz receives current energy into the device.
5. Energy that is not converted to a laptop is not reabsorbed by the antenna. People who cannot produce 10 MHz resonance and their.His object does not interfere with it.



As the release date of the iPhone 8 approaches, discussions about wireless charging technology are getting more and more rampant.

We usually think that electricity and magnetism are related, so when it comes to the principle of wireless charging, most of them are based on.The phenomenon of electromagnetic induction or derived from it. At present, there are four main ways to achieve wireless power transmission:
For more information, please pay close attention to JackTelecom.(www.jacktelecom.com).

Magnetic field induction

Giving a certain frequency of alternating current to the primary coil, and generating a certain current in the secondary coil by electromagnetic induction,Thereby transferring energy from the transmission end to the receiving end. This principle is similar to the principle of transformers commonly used in power systems.The alternating current is applied to the primary side of the transformer (primary coil), and the secondary side (secondary coil) is due to the principle of electromagnetic induction.Inducing the electromotive force, if the secondary circuit is connected, the induced current can appear, so that the electric energy can be realized from the emission line.Loop to the wireless transmission of the receiving coil. At present, the way to transfer electric energy in this way has been widely applied to low power,Short-range wireless charging market, such as small portable electronic devices such as electric toothbrushes, mobile phones, cameras, etc.The electric base wirelessly charges it. The power transmitting coil is mounted in the charging base, and the receiving coil is mounted on the electronic In the device.


Resonance

This wireless transmission mode is similar to the principle of wireless communication, and the electromagnetic wave of the resonant circuit of the transmitting end is full.An azimuth open type diffuses throughout the space, resonating at the receiving end at that particular frequency, thereby achieving energytransfer. This kind of transmission mode can obtain higher transmission efficiency when the output power of the receiving end is relatively small. But its existence Electromagnetic radiation, the greater the transmission power, the farther the distance, the lower the efficiency, the more severe the radiation.For more information, please pay close attention to JackTelecom.(www.jacktelecom.com).



Magnetic coupling resonance

This method can be regarded as an enhanced version of the resonance type, which needs to transmit and receive two resonance systems, which can be separately sensed.Should be made of coils. By adjusting the transmission frequency, the transmitting end vibrates at a certain frequency, and it does not diffuse everywhere.Ordinary electromagnetic wave, but a non-radiative magnetic field, that is, converting electrical energy into a magnetic field, forming a kind of relationship between two coils Energy channel. The natural frequency at the receiving end is the same as the frequency at the transmitting end, and resonance occurs. With every resonance,More voltage is generated in the receiver inductor. After multiple resonances, the sensor surface will gather enough Energy, so that the receiving end receives energy in this non-radiative magnetic field, thereby completing the conversion of magnetic energy to electrical energy.Wireless transmission of electrical energy is now available. A laboratory at MIT showed an experiment in 2008, which was separated within two meters.Light up a 60W bulb, they named the technology Witricity, and the project is still in the lab stage. Of course, the range of such non-radiative electromagnetic fields is relatively limited, and it is not suitable for long distances.The end is within 8 times the radius of the induction coil.For more information, please pay close attention to JackTelecom.(www.jacktelecom.com).



Radio wave

We all know that electromagnetic waves can be used to transmit information. In theory, energy can be transmitted as long as the frequency is high enough.
This wireless charging method may be the closest to people's imagination of wireless charging, placing an electric power at the power supply.
The magnetic wave generator transmits the energy to the receiving antenna through the transmitting antenna, and then re-converts the electromagnetic wave signal into electric energy.
For equipment use. This type of power transmission also has obvious weaknesses, such as electromagnetic waves are subject to large interference and transmission efficiency.
Can be low, have radiation to the human body.
For more information, please pay close attention to JackTelecom.(www.jacktelecom.com).

Current wireless charging work of QI standard.The rate is mainly maintained at around 15W. It is speculated that the wireless charging of the iPhone 8 will use 5V/1.5A power.7.5W of charging power It may take a whole night to fill a mobile phone. Therefore, at the current technical level, Xiaofan Long-distance transmission within the perimeter is not yet mature. We are looking forward to the breakthroughs of scientists and engineers.Come and bring us more surprises.
 
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