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Shenzhen Green Power Energy Battery Co.,ltd specializes in a wide range of digital battery such as environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery, 3.7V lithium polymer battery, NiMH battery, NiCD battery, dry cell battery, alkaline battery, heavy duty battery, button cell battery etc. we devote to R&D, innovation, production & sales. With automatic production machines we have been exported goods to all over the world over 15years. We have complete exported certificate such as KC, CE, UL, BSCI, ROHS, BIS, SGS, PSE etc
Dongguan Datapower New Energy Co.,ltd is a high-tech production enterprise which specialize in the R&D and production&sale of lithium polymer batteries,drone battery,airplane batteries &battery pack etc.
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release time:2024-04-07 Hits: Popular:AG11 battery
Application of LLC resonant conversion technology in switching power supply
With the rapid development of electronic technology and the increasing awareness of people's environmental protection, the requirements for power products in terms of size, efficiency, reliability, lifespan and comfort are getting higher and higher. Traditional switching power supply technology can no longer meet these requirements. . In 70W-500W AC-DC power supplies, switching power supplies using LLC resonant conversion technology are more efficient than traditional topology switching power supplies. Therefore, LLC resonant conversion technology is increasingly used in power supply products.
The figure below shows a typical half-bridge LLC resonant converter circuit:
Its equivalent voltage transmission relationship is:
fr1 is the resonant frequency of the resonant cavity
x is the normalized value of the switching frequency relative to the resonant frequency
k is the ratio of the transformer’s excitation inductance and resonant inductance.
Zr is the characteristic impedance of the resonant cavity
Re is the equivalent load AC impedance
Q is the quality factor
According to the voltage transmission relationship formula, the voltage transmission relationship curve under different variable conditions can be drawn:
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