LED fluorescent lamp power supply, the difference between LED power supply and fluorescent lamp powe

The mains is filtered by EMC, rectified, PFC corrected, and output at constant current. There are many kinds of fluorescent lamp power supply schemes, isolated, non-isolated, buck, etc., which are inseparable from them, which is a constant current switching power supply.

Mains rectification, switching power supply, LED constant current drive.

LED lamps are usually used with constant current power supply, if you want to pass CE certification and other certifications, basically use isolated power supply, non-isolated power supply is also used, but the safety is not as high as the isolated power supply. The current built-in power supply is usually the highest 22W, and two built-in power supplies may be required to add current upwards.

Second, the principle of the fluorescent lamp start-up process.

When the power is turned on, because the daily lamp is not lit, the power supply voltage is all added between the two electrodes of the Qihui fluorescent tube, and the argon gas in the Qihui is ionized. The high temperature of ionization causes the "U" electrode to straighten when heated, and the two electrodes come into contact, causing current to flow from one end of the power supply to the ballast Filament Starter Filament The other end of the power supply, forming a pathway and heating the filament. The filament is heated by an electric current (called the start-up current or preheating current) passing through it, causing the oxide to emit electrons.

At the same time, when the two electrodes of the glow tube are turned on, the voltage between the electrodes is zero, and the ionization phenomenon in the starter stops immediately. At the moment of departure, the current flowing through the ballast changes abruptly (abruptly to zero), and due to the high inductance of the core coil of the ballast, a sufficiently high self-inductive electromotive force is generated to act on both ends of the lamp. This induced voltage, together with the mains voltage, is applied to both ends of the lamp, which ionizes the inert gas in the lamp and produces an arc discharge.

As the temperature in the tube gradually increases, the mercury vapor is free, colliding with the inert gas molecules to discharge, when the mercury vapor arc discharge, it will radiate invisible ultraviolet light, and the ultraviolet light emits visible light after excitating the phosphor on the inner wall of the lamp.

During normal operation, the voltage at both ends of the lamp is low (about 110 volts at both ends of a 40 watt lamp and about 60 volts for a 20 watt lamp), which is not enough to cause the starter to produce a glow discharge again. Therefore, the starter only works during the start-up process and is in a disconnected state once the start-up is complete.

1. The circuit is different

The LED fluorescent lamp power supply is dimmed at the front of the line, and the thyristor circuit is adopted.

The LED fluorescent lamp power supply adopts a triode circuit for dimming along the rear edge, and the dimmer choppers the input voltage waveform.

2. There is no difference in which circle is the input voltage.

The leading edge of the LED fluorescent lamp power supply is cut in front, that is, starting from the AC phase 0, the input voltage is chopped until the thyristor is turned on, and there is no voltage input.

The trailing edge of the LED fluorescent lamp is dimmed and turned off from one phase until it starts to turn on at 180 degrees.

3. The role is different.

LED fluorescent lamp power supply front dimmer has the advantages of high adjustment accuracy, high efficiency, small size, light weight cavity chain, easy long-distance operation, etc., which dominates the market, and most manufacturers' products are this type of dimmer.

LED fluorescent lamp power supply trailing edge dimming: MOS IGBT technology with zero crossing on, trailing edge off, solves the problem of grid interference and noise. The soft start and soft shutdown technology used in the dimming actuator avoids the thermal shock of the filament, so that the life of the lamp is further extended.

Expand Lee's Profile:

LED fluorescent lamp power supply is to convert the power supply ** into a specific voltage and current to drive LED light converter, usually: the input of LED drive power supply includes high-voltage power frequency AC (i.e., mains), low-voltage DC, high-voltage DC, low-voltage high-frequency AC (such as the output of electronic transformer), etc.

The output of the LED driver power supply is mostly a constant current source that can change the voltage with the change of the forward voltage drop value of the LED. LED fluorescent lamp power supply is a kind of LED driver, it is the most important component in LED fluorescent lamp, improper selection, LED fluorescent lamp can not play a performance, or even can not be used normally.

The characteristics of LED semiconductors determine that they are greatly affected by the environment. For example, as the temperature changes, the current of the LED increases, and the voltage increases, the current of the LED also increases. Working beyond the rated current for a long time will greatly shorten the service life of the LED.

The constant current of LED is to ensure that its working current remains unchanged when environmental factors such as temperature and voltage change.

These two kinds of light and martial arts can be made the same outside the cavity or with the view.

It's just that the principle of light is different.

The fluorescent lamps that used to be can now be replaced with LED tubes.

With the continuous improvement of science and technology, the standard of living has gradually improved. Now there are more and more styles of home lighting, I believe you have an understanding of LED fluorescent lights, because this is what each of us will have in our homes, LED fluorescent lamps are brighter than the traditional lights of the same wattage, and the brightness of its lights also appears soft, the protection of the eyes is also better, LED fluorescent lamps are made of light-emitting semiconductor materials, and the heat dissipation is also relatively good. So how much do we know about the manufacturers that produce these LED fluorescent lights?

So let me show you about it.

Yaha lighting, the ancient town of Zhongshan City****

Zhongshan Guzhen Yaha Lighting **** was established in Zhongshan City, Guangdong Province, founded in 2011, it is a modern enterprise specializing in the design, production and sales of LED fluorescent lamps and other products. In order to seek the most advanced technology, the company has introduced advanced production technology at home and abroad, and production equipment and instruments, and the company also has an experienced professional R & D team. The company has always been based on integrity, customer-oriented management philosophy, in the market has won a lot of praise.

The company's products are exported to Europe, Africa, North America, Oceania and Southeast Asia.

Shenzhen Hualiu Electronics

Shenzhen Hualiu Electronics is located in Shenzhen, Guangdong Province, China, with superior geographical location and convenient transportation. It is a modern manufacturer specializing in the production of LED energy-saving lamps and fluorescent lamps

LED bulbs, LED spotlights, LED ceiling lights and other products. The company introduces advanced technology, innovative design concepts, as well as unparalleled reliability and introduces an experienced team. In order to achieve high-quality product performance, the company has been constantly improving technological innovation and production control.

Now the company's products are sold to every province in China, and we are aware of cooperation and exchanges with new and old friends in the industry.

Shenzhen Meichuang Semiconductor Lighting****

Shenzhen Meichuang Semiconductor Lighting Co., Ltd. is located in Shenzhen Special Economic Zone, Guangdong Province, it is a modern high-tech enterprise specializing in the development, production, sales and service of LED lighting products. The company has always adopted advanced production technology at home and abroad, pursued innovative design, and introduced a R&D team with rich experience. Produce high-efficiency, energy-saving, environmentally friendly, safe LED fluorescent lamps and other products.

In recent years, the company has been challenging the technical hurdles. Quite a few problems have been solved. At present, all the products are sold in China, and overseas business is expanded.

The above is a manufacturer of LED fluorescent lamps carefully prepared for everyone, respectively: Zhongshan Guzhen Yaha Lighting, Shenzhen Hualiu Electronics, Shenzhen Meichuang Semiconductor Lighting. These three companies have advanced production technology and the latest production equipment and instruments, and have an experienced R&D team on the Tuanxiang jujube team, and have been pursuing the efficiency and safety of quality, so you don't have to worry about quality problems, and friends who want to buy and produce can choose the manufacturer prepared for you.

You can get it for free

With the continuous improvement of science and technology, the development of lighting tools also focuses on energy saving and environmental protection. LED lamps have the advantages of high power saving, long life, and low damage to human eyes, and have become the mainstream of people's choice of lighting tools. At present, the manufacturers of LED work lights on the market are more complicated, which has a great impact on people's purchase.

Today, I will introduce a few LED work light manufacturers.

Guangzhou Shengnanteng Electronic Technology ****

The company is located in Baiyun District, Guangzhou, Guangdong, is a professional manufacturer of automotive LED work lights, LED searchlights, maintenance lights and other series of lighting fixtures. In recent years, through the high-salary employment of technical guidance and shareholding business model, a group of high-quality R&D and production management talents have been gathered. With good reputation and high-quality quality, the products are exported to Europe, America, Southeast Asia and the national market, and the company has won high praise from customers at home and abroad.

At present, the company produces LED work lights, which are generally rectangular and circular, with a power of between 18 and 45 watts, and its ** is about 78 yuan to 113 yuan.

Foshan Weisto Electronic Technology ****

Officially registered in 2015, Weishitu Electronic Technology Co., Ltd. is located in Lunjiao Town, Shunde District, Foshan City, Guangdong Province, the company is mainly engaged in the research and development and manufacturing of LED lamps and lanterns. Since the establishment of the company, it has adhered to the principle of "integrity management, quality first", and passed the quality ISO9001 standard in the same year. The products produced cover the automotive field, household, commercial, road, etc., which can meet the different needs of different customers.

The LED car work lights produced by it adopt foreign advanced technology, with a service life of up to 30,000 hours, and at the same time have a waterproof function, and the current retail market is 46 yuan.

Changzhou Ouhui lighting fixtures****

The company is located in Changzhou High-tech Development Zone, Jiangsu Province, specializing in the production of portable LED work lights, portable lights, mobile lighting vehicles, explosion-proof work lights, automatic mobile lighting towers and other lighting fixtures. In recent years, the company has introduced advanced production equipment and strict quality inspection, and has passed ISO9001 and ISO2000 quality system certification, becoming one of the largest lighting manufacturers in China. Its portable LED work lights can meet the requirements of many industries, and are the company's best-selling products, with a current market of 99 yuan.

The above is the introduction of several LED work light production companies, for your reference when purchasing. Of course, in addition, there are many companies that produce LED work lights that are also very good. Rough noises like Yueqing Oushi Lighting, Guangzhou Lvshuo Optoelectronics Technology, Ninghai and Xiang Electric are relatively large manufacturers in China.

You can get it for free

LED dimming driver, with high efficiency and reliability of constant voltage, is very wide in practical applications, through the output signal line of the power supply, to achieve the dimming of LED lights, a better, more perfect LED dimming driver, can further meet the requirements of energy conservation and emission reduction, so as to achieve a low-carbon life in the future, can also effectively extend the service life of LED lamps, can be transformed into actual economic benefits of the exclusive advantages of LED lighting fixtures. The following is an introduction to several LED dimming drivers.

The first, more economical and cheap LED dimming driver, using remote control, adjustable color temperature, brightness, this controller is also particularly simple to use, easy to operate, one end is connected to a special dimmable light strip, and the other end is connected to the household 220 volt alternating current can be used. Through the switch reserved at home, you can switch between positive white light, warm white light, and neutral light once every time you switch it. It consists of a power plug, a controller, and a signal receiver.

Energy saving, low-carbon environmental protection, intelligent protection, safety and stability, high temperature resistance, wear resistance, and longer life. This LED dimming driver that can be controlled by remote control is about 50 yuan, which is economical.

The second, LCM series is the only multi-current optional model in the MEAN WELL LED power supply, it has the function of simultaneous dimming, using constant temperature, constant voltage, constant current collapse and fierce work, through the control line dimming, DA type through the built-in DALI interface and button jog dimming, with active power factor correction function. It has a waterproof connector and an aluminum shell potted encapsulated and can be assembled on the output bridge line to suit working in wet or indoor environments. In addition, there is an automatic protection mode, a constant current limit mode, which can be automatically recovered when the load is abnormal, and can also be automatically recovered when the current is short-circuited.

It is suitable for all kinds of LED street lights, high bay lights and other indoor and outdoor LED applications and industrial control application projects, which is safer. The ** of this LED dimming driver is about 100 to 300 yuan.

The third, HLG series products belong to the bipolar power factor school shed correction function LED lighting waterproof power supply, with constant voltage, constant current working mode, 4KV surge resistance level, 100 watts and above models through the Class 2 power limit test, with perfect protection measures including overheating protection. Resistant to 5G vibration, -40 degrees Celsius start-up, output voltage and current can be set. Worldwide input voltages up to 305VAC are available.

This LED dimming driver is a high-performance, dustproof and waterproof 600 watt AC variable DC LED power supply**, using an aluminum shell and silicone filling for easy heat dissipation. It has an efficiency of up to 96% and is second to none in the field of LED power supplies. Of course, the ** of this LED dimming driver is also relatively high, around 500 to 1000 yuan.

In the selection and application of LED dimming driver, attention should be paid to product functions, main features and main parameters, and it is the best choice to choose a safe, reliable and durable dimming driver. LED dimming driver, introduced here, I hope to help everyone.

You can get it for free