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:2024-03-08 Hits: Popular:AG11 battery
Aiming at the fact that the filter capacitor of the traditional LED lamp rectifier circuit causes the AC input current waveform at the rectification front end to become sharp pulses, causing problems such as low power factor and increased harmonic components, a new ACLED converter topology circuit is proposed. The BuckPFC power factor correction circuit and LCC circuit were analyzed in detail respectively. The working principle of the BuckPFC circuit, the operating frequency of the switching tube and the size of the capacitance value are analyzed. At the same time, the working principle of the half-bridge circuit and the selection of parameter values are analyzed theoretically and simulated. Finally, it was verified through experiments that the circuit topology can improve the power factor. This circuit topology can overcome the problems of traditional rectifier circuits such as reduced controller life and harmonic components due to back-end capacitance.
The traditional constant current control of LED lights is through AC/DC and then through a DC/DC converter. In the AC/DC converter, a filter capacitor is usually used behind the rectifier circuit to smooth the output voltage, but large capacitors The existence of causes the input current waveform at the AC terminal to become a sharp pulse instead of a sinusoidal function (reducing the power factor). Based on the above shortcomings of LED control, this article adopts ACLED converter control. In DCLED converters, since the input power is pulsating and the output power is constant, an intermediate energy storage capacitor is needed to balance the difference between the two. Therefore, the energy storage capacitor is generally larger in value, and electrolytic capacitors are used. However, electrolytic capacitors with high values are The life of the capacitor is much shorter than the life of the LED, resulting in a reduction in the life of the overall converter.
If ACLED is used and both the input and output power are pulsating, the required energy storage capacitor value will be smaller, which will increase the life of the overall converter. The existing ACLED lamp circuit structures include series structure, ladder structure and bridge structure. In the ACLED circuit structure, when the input AC source is the grid voltage of 220V, 50Hz, if the current limiting resistor is not connected in series, a large number of LED lamps need to be connected in series to limit the LED current. At this time, the total turn-on voltage is increased, resulting in a very low power factor. . When a current-limiting resistor is connected in series, the number of LEDs that need to be connected in series is reduced and the power factor is improved. However, the efficiency will be reduced because of the current-limiting resistor. In addition, when the LED operating frequency is 50Hz, the light source will obviously flicker; while when the LED operating frequency is 100Hz, most people will not feel the flickering of the light. In order to solve the low power factor and efficiency of ACLED, and to improve the frequency problem shown by the load structure, this paper proposes a new ACLED converter topology circuit, and analyzes and studies the topology circuit and control method.
1ACLED lamp conversion structure
Figure 1 shows the structure diagram of the proposed ACLED converter. vdc is the pulsating voltage of 220V AC voltage that has been uncontrolled rectified. In order to improve the power factor, this article uses a BuckPFC circuit to correct the current waveform. The output voltage of the BuckPFC circuit is converted into an AC signal through the half-bridge converter, which is used as the input voltage of the subsequent LCC circuit and is provided to the load LED lamp. Therefore, this topological circuit mainly includes the rectifier circuit, BuckPFC, half-bridge converter and LCC resonant circuit. As can be seen from Figure 1, the values of C1 and C2 are very small to achieve, so the capacitor has no impact on the life of the entire topological circuit; the fundamental frequency of the input and output AC voltage of the LCC resonant circuit is 100Hz, thus loading the LED The voltage frequency is also 100Hz, and no voltage flicker can be seen at this frequency.
Read recommendations:
First use method of lithium battery
powerwall lifepo4 battery for solar system.New breakthrough in ternary lithium batteries - magazine
Last article:button cell battery cr2025.Provide technical services to support the development of the photovoltaic
Next article:CR1625 battery.Energy storage economics research
Popular recommendation
AAA Ni-MH batteries wholesale
2023-03-22602535 battery company
2023-03-22551521 lipo battery company
2023-03-22connector for energy storage battery manufacture
2023-05-10402030 battery direct sales
2023-03-22LR20
2023-02-076F22
2022-12-013.2V 304Ah
2022-10-12Home energy storage battery FBC-HS01
2022-11-08LR6
2022-08-19Lithium Battery GN4830
2022-08-19R03P
2022-12-016F22
2022-08-19801620 180MAH 3.7V
2023-06-10Ni-MH AA1800mAh 1.2V
2022-07-01batteries 9v
2023-06-252000mah 18650 battery
2023-06-25CR2477 battery
2023-06-2518650 battery 3500mah
2023-06-25battery 18650 rechargeable
2023-06-25What is the difference between energy storage lithium-ion battery pack and power lithium-ion battery
2022-11-07Basic requirements for ship batteries
2024-07-18Standard for marine lithium batteries
2024-06-15Working Principles of Lithium - ion Batteries
2025-03-209.6kwh energy storage lithium solar battery.How to extend the service life of battery packs
2023-11-03Battery discharge by yourself.3.7V 18650 lifepo4 battery
2023-07-13Drone battery charger.lifepo11 battery for solar energy storage Manufacturing
2023-04-25What common sense do you need to understand when using high-temperature batteries.button cell batter
2023-09-04Battery model.lithium 3400mah 3.7v 18650 battery
2023-07-07Negative pole material of cylindrical battery
2022-12-02