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LED fluorescent tube of drive power supply will be read

时间:2015-05-24 来源:浏览次数:120

LED daylight lamp driver power is the power supply is converted into a certain voltage current to drive the LED voltage converter, normally: LED drive power supply input, including high voltage ac power frequency (mains), low voltage, high voltage direct current, low voltage high frequency ac dc (such as the output of electronic transformer). And the output of the LED driver power supply are mostly can change with LED positive pressure drop values and change the voltage of the constant current source.

According to the electricity grid rules and characteristics of the LED drive power supply requirements, in the selection and design of the LED drive power supply should consider the following:

1. The high reliability, special like LED street lamp driver power supply, in a high altitude, maintenance is not convenient, the cost of maintenance is also big.

2. LED is energy efficient appliances, drive power efficiency is higher. For the structure of the power supply to install the LED driver power supply in the lamps and lanterns, is particularly important. Because the LED luminous efficiency with the rising of LED temperature drops, so the LED heat dissipation is very important. Power supply of high efficiency, its power consumption is small, in the lamps and lanterns of calorific value is small, also lower the temperature of lamps and lanterns. Good for delaying the LED light failure.

3. High power factor power factor is the requirement of load of power grid. Generally below 70 watts of electrical appliances, there is no mandatory indicators. Though the power of a single use lower electric power factor, the impact on the grid is not big, but at night you light a lamp and its load is too concentrated, can produce serious pollution to grid. For 30 ~ 40 watts of the LED drive power supply, it is said that in the near future, may be the index of power factors have certain requirements.

The driving mode of 4. Popular now have two kinds: one is a constant voltage source for multiple constant current source, each constant-current source separate for each LED power supply. This way, flexible combination, LED failure all the way, don't affect the work of other leds, but the cost would be slightly higher. The other is a constant current power supply directly, leds in series or parallel operation. It has the advantage of low cost, but poor flexibility, but also solve a LED failure, does not affect other LED running problem. These two forms, for a period of time. Multi-channel constant current output power supply way, in terms of cost and performance will be better. Maybe the mainstream direction of the future.

5. The ability of anti surge surge protection LED is relatively poor, especially the reverse voltage resistance. Strengthening the protection is also very important. Some LED lights installed outdoors, such as the LED street light. As a result of the power grid load and sling and lightning induction, into the various surge from the grid system and some surge can cause the damage of the LED. So the LED drive power to suppress surge intrusion, ability to protect the LED was damaged.

6. Protection function Power supply in addition to conventional protection function, it is better to add the LED temperature in the constant current output feedback, prevent LED temperature is too high.

7. Protection type lamps and lanterns is installed outside, the power supply structure to waterproof, moistureproof, shell to fast.

8. The life of the drive power supply and LED the life of the adapter.

9. To conform to the requirements of safety and electromagnetic compatibility.

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