Intelligent wireless charging system circuit principle

Wireless Crystal 3.2*2.5mm 3225 25M (25.000MHZ) 12PF 10PPM 20PPM 30PPM

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Overview:
The intelligent wireless charger utilizes the principle of electromagnetic induction, which is a non-contact charging system, which no longer transmits power through a wire (charging line), but is charged by wireless transmission. There is no physical interface for charging, which avoids the trouble of plugging or unplugging the battery compared with the general charger.

Today, with the rapid development of electronic technology, the number of mobile phone users worldwide has reached 3.3 billion. Together with other peripheral electronic products such as MP3 and MP4, on average, less than two people have a portable electronic product that needs to be charged. At present, data line plug-in charging is commonly used. This type of charging method has a bad touch phenomenon when the data line interface is used for a long time, and the individual chargers are not widely adapted, because different types of electronic products need to use different ones. The charger, when looking for a suitable socket and smoothing the wiring, can be said to be time-consuming and laborious; charging various portable electronic products is a headache. In order to improve the above phenomenon, it is necessary to develop a smart wireless charger.

The intelligent wireless charger utilizes the principle of electromagnetic induction, which is a non-contact charging system, which no longer transmits power through a wire (charging line), but is charged by wireless transmission. There is no physical interface used for charging. Compared with the general charger, it avoids the trouble of plugging or unplugging the battery. It has the working principle of the general charger. The work uses one (charger) to charge multiple (inductive load) and intelligently charge. Design idea; when the wireless charger charges the load, the indicator light will be converted from green light to colorful light, and the mobile phone also correctly displays the charging status and intelligently completes the charging process (the experimental product is a mobile phone). The charger can charge multiple loads at the same time, can automatically sense whether there is load charging, achieve automatic charging, automatically power off 10 seconds after full charge, to achieve intelligent; thus greatly facilitating users. The smart wireless charger is very convenient to use, and a charger can meet the needs of a family. It has the advantages of high promotion and application value, low cost (similar to the price of a general charger), and many other large companies in the world (such as Sony). , Intel, Apple, Philips, etc.) is also in the hot research; smart wireless charging will be the development direction to replace the physical plug, will certainly be welcomed and valued by people.

The NE555D pulse generator module is shown in Figure 1. According to T = (R1 + Rp) C1, f = 1 / T, adjust Rp to make NE555D output a pulse frequency of 36.7KHZ.

Figure 1 NE555D pulse generator module (please read the PDF for details)