Lithium Battery 3.7V Lithium Polymer Battery 3.2V LifePo4 Battery 1.2V Ni-MH Battery Button Coin Battery
3.7V Battery Pack 7.4V Battery Pack 11.1V Battery Pack 14.8V Battery Pack Other Battery Pack
Sino Science&Technology Battery Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of Lifepo4 batteries,energy storage battery,portable UPS power supply,personalized customization lithium battery pack etc .
Environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery,3.7V lithium polymer battery, NiMH battery , NiCD battery ,Lead acid battery,dry cell battery ,alkaline battery ,heavy duty battery, button cell battery etc. we devote to R&D,innovation ,production & sales
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.
Anhui Seong-hee New Energy Technology Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of primary batteries. And mainly produces and sells alkaline batteries & carbon zinc batteries. there are size AA, AAA, C, D, 9V etc
Guizhou STD Battery 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.
release time:2024-04-08 Hits: Popular:AG11 battery
Explanation of front-stage open and closed loop circuits in high-frequency inverter power supplies
The high-frequency inverter power supply is different from the ordinary inverter power supply. It can convert low-voltage DC power into high-frequency low-voltage DC power, and then generate high-voltage DC power through boost processing. Among high-frequency inverter power supplies, the front-end circuit is a more important and problematic part.
This article will introduce the turns ratio design of the closed-loop front-stage and quasi-open-loop front-stage transformers in the front-end circuit, and give a more detailed introduction.
Design of turns ratio of closed-loop front-stage transformer
Whether the front stage of the inverter is open loop or closed loop, only the turns ratio of the transformer and the parameters of the feedback loop are different. For example, you need to design a high-frequency modified square wave inverter with an input of 12V, a variation range of 10.5-15V, and an output voltage of AC 220V50Hz. If the front stage adopts a closed-loop structure, it is better to stabilize the 12V boosted DC voltage at 270V. In order to output 270V when the input is 10.5V, the transformation ratio of the transformer is approximately (270+2VD)/(10.5-VDS )/D, where VD is the voltage drop of the high-voltage rectifier tube, VDS is the voltage drop of the front-stage MOS tube, and D is the maximum duty cycle. The calculated result is approximately 28.
Special attention should be paid to the fact that when the current stage works in a closed-loop state, for example, if the input voltage is relatively high, the peak value of the pulse obtained by rectifying the positive terminals of D1 and D3 will exceed 270V, and the duty cycle will be less than 1. L1 and C11 smoothing filtering is required, so L1 cannot be omitted, and it must be large enough, otherwise the MOS tube heat loss will be great. The specific calculation can be based on the calculation of the output filter inductance of the forward switching power supply, and will not be repeated here.
Read recommendations:
Do you need to pay attention to any safety issues during the use of lithium polymer batteries?102450
Last article:18650 battery lithium ion 2200mah
Next article:lithium ion battery 18650 price
Popular recommendation
18650 battery 3.7v 2200mah
2023-03-22lifepo4 200ah battery pack 12v
2023-05-09522749 battery wholesale
2023-03-22801752 battery Processing
2023-03-2212v 18650 battery pack
2023-03-22Coin Cell BR 1220
2022-10-15503759 1200MAH 11.1V
2023-06-10Ni-MH AA1200mAh 1.2Va
2022-07-01601848 500mAh 3.7V
2022-08-19801538 480mAh 3.7V
2022-06-27LR20
2022-11-22902030 500mAh 3.7V
2022-06-27R03P
2023-02-18603450 1200MAH 3.7V
2023-06-10R20
2022-08-19lithium lon battery energy storage system
2023-06-25li ion 18650 battery pack company
2023-06-25Nickel Hydride No. 5 batteries
2023-06-25button battery cr1620
2023-06-25NiMH No. 7
2023-08-04Graphite negative electrode for lithium batteries
2024-01-10Lithium Battery Electrode Preparation Process Flow
2025-08-27What is the working principle of lithium batteries?
2024-09-14How to Maintain a Laptop Battery
2025-07-23Energy density issues of new energy vehicle power batteries.18650 lithium battery cells
2023-09-22Mobile lithium battery recognition memory effect.802540 polymer battery
2023-05-19Lithium power battery storage method.3.7V 18650 lifepo4 battery
2023-07-11Advantages and disadvantages of lithium iron phosphate battery
2022-12-01Main advantages of lithium battery
2022-12-16What is the general configuration of 18650 lithium batteries from a lithium battery manufacturer.186
2023-09-05