The new round of driving technology revolution started
It’s a matter of going to the power-driven driver. Many people in the industry can’t figure out it. In fact, whether it’s going to the power-driven drive technology or the “de-powered†technology in the industry, these statements are not accurate enough, not without a drive, but through The circuit design and microelectronics process make the drive circuit small and highly integrated with the LED.
De-powered drive, that is, AC direct drive technology, similar to the sound card integration of desktop computers, originally a separate sound card, need to be inserted in the slot, after the advancement of technology, now integrated on the motherboard, to the power drive is also in this way.
Driving power development history
"Driver circuits are, in principle, divided into switch circuits and linear circuits. Earlier, everyone used switching power supply circuits, from isolated to non-isolated, or boost circuits, or buck circuits, which are switches. Power technology. AC drive is a high-voltage linear circuit that does not require buck conversion, the circuit is simple and reliable, and can achieve high integration," Jin Hongbing, director of LED application of Shenzhen Xinli Light Source, told reporters.
Drive power stage
All DC LED lighting products must be equipped with an AC to DC (AC/DC) drive to turn the voltage into a low voltage constant current. Because the LED is DC low voltage, the driver LED can be installed to work properly. The linear circuit refers to a circuit composed entirely of linear components. Linear power supplies generally use transformers to change from high voltage to low voltage, and then rectify output DC voltage. This is bulky, bulky, inefficient, and generates a lot of heat. When the heat is high, the life of the component is necessarily reduced, which affects the final use effect.
The service life of the drive components has always been criticized by the industry: the life of the LED can easily reach 30,000 hours, but the drive is generally only 5,000 to 10,000 hours, the life of the drive is much lower than the service life of the LED, and the power supply is bad. There is no way for LED lamps to work properly, especially for small-volume products such as LED bulbs . It is understood that more than 50% of faulty LED luminaires are derived from power problems. The service life of DC LEDs is much shorter than that of AC LEDs, and the cost of driving power supplies also accounts for 15%-20% of the total cost of LED lamps.
De-energized drive primary stage
Because the drive has the disadvantages of high failure rate, short life and greatly increasing the cost of LED lighting, whether the power can be removed has become a new research direction in the industry, and the de-energized drive technology such as AC LED and high-voltage LED was born.
As early as 2005, Seoul Semiconductor invented an AC LED that can be directly driven by AC to emit light; immediately, III-NTechnology developed a gallium nitride substrate based on MOCVD growth technology to enhance the application of illumination and sensors; In 2008, the “Industrial Technology Research Institute†in Taiwan also completed an AC LED product that can be industrially produced and has practical application system solutions. It can be directly plugged into an AC110V AC voltage of 60 Hz or higher to make it emit light. At the time, the United States, South Korea and Taiwan were among the leaders in global exchange LED technology.
In order to improve the life of the drive power supply and reduce the cost, the electroless capacitor drive scheme has appeared frequently on various industry websites several years ago, and each drive power supply manufacturer also sells it with the use of electroless capacitors. The electroless capacitor drive scheme is the initial stage in the development of drive power to “de-energizeâ€. Of course, the industry's current de-energized drive includes not only electroless capacitors, but also transformers and other components. So far, the LED lighting products have become smaller, but the life and cost problems have been solved. The bottleneck is created - "strobe." In view of the characteristics of the AC, when the voltage is high and low, the lamp will flash and flash. The problem of stroboscopic is difficult to avoid. Although the eyes can't be seen clearly, in the long run, the damage to the human eye and the retina is very large.
In addition, the stability has become a factor that has been questioned by the industry for the de-energized drive. The lack of a capacitor, the energy storage component, does not function as a stable voltage. The entire LED lamp has some unstable factors. In the early stage of development, there were many problems in de-energizing the drive. Therefore, before 2012, the de-energized drive technology was still in the stage of “cultivating in the depths of peopleâ€, and the industry also held more reservations.
Go to the advanced stage of the power drive
Today, overseas markets have conducted more in-depth research on AC LED technology, and technology development and market development are one step ahead of the domestic market. Seoul Semiconductor, Taiwan Interlight, and US Exclara have become the backbone of R&D AC drive technology. Currently, the foreign market is dominated by Seoul Semiconductor and Lynk Labs' AC LED driver IC engine technology. Texas Instruments also expands its products into LED driver field. Introduced a new AC LED driver IC designed to simplify engines based on AC LED drive technology.
After 2012, in order to overcome the "stroboscopic" problem and instability of de-energized products, many domestic LED companies have carried out research and development.
Taking Xinli Light Source as an example, it cooperated with Changchun Institute of Applied Chemistry of Chinese Academy of Sciences to develop "light-emitting afterglow life controllable rare earth LED luminescent materials and its application in semiconductor lighting", which solved the stroboscopic problem of AC LED lighting and made China become At that time, the only country in the world that mastered the production of low-frequency flash AC LED products through rare earth phosphors.
Taking Juke Lighting as an example, its recently launched G40 ceramic LED new product adopts de-energized drive scheme, photoelectric integrated ceramic heat dissipation, and heat dissipation is more obvious. With high-precision constant current IC, overvoltage overheat protection scheme is adopted, no stroboscopic (170-240VAC), not only reduces the chance of drive failure, but also greatly improves the continuity and stability of the product.
The de-energized drive has gradually evolved toward standardization. For example, Changyuntong's de-energized IC-driven high-voltage LED technology was selected as the standard LED component of Guangdong LED lighting, indicating that the technical solution is suitable for standardization; and the new G40 ceramic LED product adopts the universal G9 lamp head design, which makes the installation more convenient and quick. It is also more conducive to standardization.
Going to the power supply drive "non-mainstream" has little impact on the industry
For the driver power supply enterprise, the germination of the power supply driver is still very safe for the time being. At present, most LED lighting factories produce DC LED lighting products, and AC LED or high voltage LED products are still "non-mainstream" products, whether it is going The limitations of the power-driven drive and the market penetration rate are in a weak position, so the power companies surveyed hold a disapproval attitude toward the power-driven drive.
For the application enterprise, the de-energized drive solution is still "still immersed in the face", and it is still ignorant for the de-energized drive. But now there are some "warriors" to try. Juke Lighting Director and Secretary-General Wang Junhua told reporters that half a month ago, GSK Lighting introduced a G40 ceramic LED new product with a de-energized drive solution. However, in one week, hundreds of Guangdong enterprises took the initiative to try samples or Order directly. It can be seen that the development of the power-driven drive in the next two years is quite worth looking forward to, especially the application enterprise and market channels need attention.
Who moved the heart of the LED?
With the continuous development of LED technology, the LED industry can be described as leaps and bounds. Under the tide of the elimination of global incandescent lamps, LED will become the most potential stock in the future. If the chip is the "brain" of LED , and the LED drive power is like the heart of LED lighting, at present, the LED industry has increased efforts to invest in "heart" research and development and production.
In 2013, Nymet launched the high-tech LED lighting exhibition with the non-powered power supply series; in 2014, the core technology and new product launch conference of the “De-Powered LED Standard Optical Component†of Aoqisi-Changyuntong Optoelectronics was held in Shenzhen... A series of frequent actions prove that the driving power supply in the LED lighting industry has become the core of competition. Who moved the heart of the LED? What is the difference between a driver power supply and a de-energized drive product?
Drive power status
At present, in the LED lighting market, the driving power supply has an isolated constant current power supply and a non-isolated constant current power supply. The current status is to directly convert the DC voltage and constant current required for LED illumination from 220V mains, and the structure is relatively simple. BOM costs are also lower. Power factor <0.70, power <80%, and lamp life <5000 hours during the use of electrolytic capacitors. In addition, the use of too many parts, the cost is too high, the voltage adjustment rate is poor. Therefore, LED lighting faces such challenges. It has to develop new technologies on the driving power supply and develop a driving power supply suitable for the current situation. At this time, the power-driven driving technology came into being.
The working life of a common LED lighting driver depends on the electrolytic capacitor that the smoothing circuit must use when AC is turned to DC. We know that the life of LEDs is as high as 100,000 hours, and the life of electrolytic capacitors is only 5,000 hours at high temperatures. The working life between them is very different, so electrolytic capacitors are the key factor limiting LED driving power. If you do not want to remove the electrolytic capacitor, then there is no way to use LED lamps in harsh environments such as high temperature, high vacuum, and long life. This is also the main reason why the industry has been actively developing power-driven drive technology.
Electric Fryer No Oil,Best Electric Air Fryer,Commercial Electric Fryer,Electric Fryer Without Oil
Ningbo ATAP Electric Appliance Co.,Ltd , https://www.atap-airfryer.com