The latest advances in wireless charging technology

Wireless charging technology is one of the areas that have received much attention in recent years. With the continuous advancement of technology and people’s demand for convenience, wireless charging has become an important development direction.

1. Electromagnetic induction charging

Electromagnetic induction charging is the most common type of wireless charging technology. It achieves energy transfer through the interaction of electromagnetic fields. The principle of electromagnetic induction charging is to use a transmitting coil to generate an electromagnetic field. When the receiving coil is close to the transmitting coil, the electromagnetic field will change, thereby generating an induced current in the receiving coil and transmitting energy to the receiving device. At present, electromagnetic induction charging technology has been widely used in consumer electronics products such as mobile phones and smart watches.

However, there are several problems with electromagnetic induction charging. First, the transmission distance is limited, usually between a few centimeters and tens of centimeters. Second, the efficiency is relatively low, usually around 60%. In order to solve these problems, researchers have made continuous improvements and innovations.

One of the latest developments is the application of electromagnetic induction charging technology to the charging of electric vehicles. Electric vehicles are charged over longer distances and require greater efficiency. At present, some car manufacturers have begun to lay electromagnetic induction charging devices in the parking area of the vehicle, and transmit energy through the underground coil and the receiving coil at the bottom of the vehicle.

In addition, some researchers have further improved the efficiency and transmission distance of electromagnetic induction charging by optimizing the design of the transmitting and receiving coils. For example, use high-frequency signals to increase the speed of energy transmission, use multiple coils to increase the receiving area, use variable capacitors to adjust the resonance frequency of the coils, etc.

2. Magnetic resonance charging

Magnetic resonance charging is a technology that achieves energy transfer through the resonance of an electromagnetic field. Unlike electromagnetic induction charging, magnetic resonance charging can achieve longer distance energy transmission with relatively high transmission efficiency.

The principle of magnetic resonance charging is to use the electromagnetic coupling between the transmitter and receiver to achieve resonance. When the resonant frequencies of the transmitter and receiver are the same, the efficiency of energy transfer is greatly improved. In addition, magnetic resonance charging can also achieve energy transmission in different distance ranges by adjusting the distance between the transmitter and receiver.

The latest research shows that magnetic resonance charging technology has made remarkable progress in terms of efficiency and transmission distance. By optimizing the design of the transmitter and receiver, the researchers have made the efficiency of magnetic resonance charging more than 90%, and the transmission distance can be in the range of meters to ten meters.

In addition, magnetic resonance charging technology can also be applied to some special scenarios, such as the charging of electric buses. Some cities have begun to set up magnetic resonance charging equipment at bus stops to realize wireless charging of buses during driving.

3. RF energy transmission

Radio frequency energy transmission is a wireless charging technology that realizes energy transmission through radio frequency signals. The principle of radio frequency energy transmission is to use the electromagnetic field of high frequency alternating current to transmit energy. RF energy transfer techniques typically use antennas as the transmitting and receiving devices.

RF energy transfer has certain advantages in certain specific situations. In the smart home space, for example, RF energy transfer can deliver power to devices, keeping them charged without touching an outlet. In addition, radio frequency energy transfer can also enable remote control of the wireless charging distance without direct contact with the device.

Although RF energy transfer has some advantages, its transfer efficiency is relatively low. Currently, researchers are looking for new ways to improve the efficiency of radio frequency energy transfer. For example, using metamaterials to enhance the concentration effect of electromagnetic fields, using power amplifiers to increase the transmission capacity of radio frequency signals, etc.

Wireless charging technology is a field of constant development and innovation. Electromagnetic induction charging, magnetic resonance charging and radio frequency energy transmission are currently the most popular wireless charging technologies. These technologies have made remarkable progress in terms of efficiency, transmission distance, and application scenarios. With the continuous breakthrough and improvement of technology, TEEMENG wireless charger will become an important part of the Internet of Things and smart devices in the future, bringing more convenience to people’s life.