Compared to traditional wired charging, wireless charging has advantages such as no need for plugging and unplugging, no physical contact, high safety, low maintenance costs, and strong environmental adaptability. The application in the medium and high-power industry has become a consensus. However, in the process of industry application, due to the uneven reliability of wireless charging solutions from various brands, many industry customers have fallen into the trap, increasing a lot of after-sales maintenance costs. In summary, one manifestation is that they often cannot charge. There are various reasons why it cannot be charged, so when selecting product applications, what are the performance of wireless charging solutions to pay attention to and avoid pitfalls? We will discuss in detail in three installments.

This issue discusses the selection of wireless charging solutions:

1. Communication reliability

The transmitting and receiving parts of the wireless charging scheme are non-contact, and the establishment, stopping, output adjustment, safety protection, abnormal feedback, and handling of the charging state require wireless communication between the two parts. Most wireless charging solutions on the market use external 2.4G modules for communication. The regulations for wireless communication frequency bands vary in different countries and regions. 2.4GHz, as the most commonly used global ISM frequency band, is widely used in communication protocols such as WiFi and Bluetooth. It is also the most common communication frequency band for out of band wireless charging solutions on the market. However, due to its widespread use, it is very susceptible to interference in complex environments and may interfere with devices in other 2.4G frequency bands. Typically, if there are a large number of communication devices such as WiFi and Bluetooth in the wireless charging working environment, the wireless charging scheme using 2.4G out of band communication is prone to interference, leading to issues such as inability to charge or easy disconnection of charging. Especially, some manufacturers have used high-performance 2.4G chips to reduce costs, which has led to this problem being particularly prominent.

The wireless charging scheme of Magnetic Trace Technology below 300W adopts carrier band communication as the communication method, which has advantages such as low cost, stable communication, and low interference. Simply put, it means that both the transmitting coil and the receiving coil can communicate and transmit energy, effectively avoiding the environmental interference problem of 2.4G communication mode and ensuring the reliability of charging.

For wireless power supply application scenarios with higher power, faster startup speed requirements, and frequent load changes, the advantage of carrier communication is weakened. Magneto Technology has also launched a wireless charging scheme based on 2.4G communication. However, to ensure communication reliability, on the basis of reliable selection of 2.4G chips, industry-leading autonomous frequency hopping software algorithms are adopted when facing interference, which can also ensure stable and reliable communication.