In the previous two sections, we discussed the data transmission and resonance control of the electromagnetic induction wireless charging system. In this paper, we will discuss the high-performance power transmission of the three core technologies in the electromagnetic induction wireless charging system, as well as the problems they face and the existing solutions. To improve the power transmission efficiency and power of the electromagnetic induction wireless power system, the easiest way is to select high-performance electronic components. Refer to Figure 14 for a typical electromagnetic induction wireless power system architecture. There are four main transmission power loss points in the system (from the DC power input of the power supply terminal): 1. The drive component of the power supply terminal, mainly the loss of current through the MOSFET, 2. The power supply and the power receiving coil and the resonant capacitor pass current Loss, 3. AC-to-DC conversion loss of the power-receiver rectifier, 4. Power-conductor regulator conversion loss. It can be seen from these four loss points that the power supply end occupies two parts and the power receiving end occupies three items. In the past experiments, it was found that the loss at the power receiving end is more than twice that of the power supply end, so the power receiving end in the process of transmitting power The temperature rise will be more obvious than the power supply terminal, which is also the reason why the circuit design of the power receiving end is more difficult than the power supply terminal. The easiest way to improve power transmission efficiency is to use high-performance components, but it is impossible to implement on the volume of products, mainly because the price of the charger itself is low in the market, so there is a considerable limit on the cost. In addition to the above methods, there is a good solution, that is, the power supply only transmits the power required by the power receiving end, and receiving too much power on the power receiving end will increase the conversion loss of the rectifier and the voltage regulator. To complete this function, you need to complete the resonance control and data transfer functions in the system. The operation of a high-efficiency inductive power system allows the power receiving end to inform the power supply of the power required by the data transmission, and the power supply terminal transmits the power output to the power receiving end through the resonance control, and this action is Fast automatic adjustment is required, so it needs to be very stable in data transmission. Therefore, the most important core technology of the inductive power system is the part of data transmission. It is also the technology that various manufacturers are actively researching and improving. There are still many difficulties in this technology that need to be broken. The author believes that there will be considerable in a few years. progress.
Wireless In Ear Earphone Tws Earbuds /Wireless Earbuds
Product Description
Features:
1, True wireless stereo: realizes movement and wireless control and everyone can share music without wrie
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Specification Tws Earbuds,Fully Wireless Earbuds,Wireless In Ear Headphones ,Mini Wireless Earbuds Shenzhen Greater Industry Co., Ltd. , https://www.szgreater.net
High performance power transfer 
Figure (14) Typical electromagnetic induction wireless power system architecture
Bluetooth Version: Bluetooth 4.2+EDR
Voice prompt for calling number
Voice prompt for power and or off
Supports :A2DP1.3/HFP1.6/HSP1.2/AVRCP1.6/DI1.3
Adopt the advanced CVC6.0 active noise-cancellation
Built-in superior HD microphone, provide clear and loud sound
Selectable colors: black,,blue and Green