What is the Principle of Wireless Charger
Most current chargers, such as iPads and iPhones, charge the device's built-in battery through direct contact with metal wires. The advantages of wireless charging technology are convenience and versatility. The disadvantage is low efficiency and can only provide electrical energy. Apple's Dock connector not only provides power, but also synchronizes audio and video files to the device through the USB interface. However, wireless charging technology will still bring improvements to WiFi and battery technology. For devices that do not require data transmission, this new technology will greatly reduce the number of various chargers required by users. In addition, through the use of wireless charging technology, public mobile device charging stations will become a reality.
What is the principle of wireless charging?
The earliest product to implement wireless charging is the electric toothbrush, which many friends should be exposed to. As early as the 1990s, wireless charging technology was widely used in electric toothbrushes of various brands. The principle is also very simple: a set of induction coils are equipped at the bottom of the toothbrush and the charging base, and the charging operation can be achieved when they are close to each other.
Of course, the drawback of this technology is that the device needs to be very close to the charging base, so people have also begun to develop improved technology. By calculating the resonant frequency, a wireless transmission distance of about one meter is achieved, which enhances practicality.
Wireless charging features
1. Theoretically speaking, wireless charging technology is safe and harmless to the human body. The resonance principle used in wireless charging is magnetic field resonance, which only transmits between coils that resonate at the same frequency, while other devices cannot accept the wave band. In addition, wireless charging technology The magnetic field used itself is harmless to the human body. But wireless charging technology is a new charging technology after all. Taking Maiyuan Technology’s wireless charger as an example, many people worry that wireless charging technology will be like when Wi-Fi and mobile phone antenna poles first appeared. In fact, the technology itself is harmless. .
2. Wireless charging technology uses magnetic resonance to transmit electrical energy in the electric and magnetic fields between the charger and the device, and the coils and capacitors form resonance between the charger and the device.
3. This system can be widely used in the future, such as charging areas for electric vehicles and power transmission for computer chips. Charging systems developed using this technology require only one-hundred and fifty-fifth of the current charging time.
4. Conversion rate has always been a concern for many people. Research by the Massachusetts Institute of Technology shows that the loss of wireless charging technology is lower than that of wired charging technology. The conversion rate of wireless charging is several percentage points higher than that of wired charging. High conversion is also a key factor in the global application of wireless chargers. However, wireless charging technology is also limited by distance. Future development will inevitably need to solve the problem of precise positioning of the wave band and magnetic field range for long-distance transmission.
5. The core chip is one of the difficulties in product application of wireless charging technology. Precise radiation range control, magnetic field frequency, and other controls are all implemented by chips.
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