Choose how much amount of product, how the connections, the control system design, if not the AC product, to choose a good power system. This is a more complicated link.
A. First, determine the number of products to be LED, and the arrangement. Is best arranged by rendering exactly the same, which they have used the design effect.
B. If it is low voltage products, we will choose the power, we should pay attention to choose a power supply to the following aspects:
- High reliability: in particular the drive power as the LED lamp, installed in the high altitude, convenient repair and maintenance cost is also large.
- High Efficiency: LED energy-saving products, driving higher power efficiency. Installed in the fixture for the power structure, is particularly important. Because the LED luminous efficiency with LED temperature decreased, so the LED’s heat is very important. Power efficiency High rate of depletion of its small power, heat in the fixture on the small temperature rise will reduce the lamp. LED light on the slow decline favorable.
- High Power Factor: Power factor is the power to the load requirements. 70 watts under normal use of electrical appliances, there is no mandatory targets. Although power is not a single factor with a lower electrical power has little effect on the power grid, but at night we light lamps, similar The load is too concentrated, would produce power more contaminated. 30 watts to 40 watts for the LED drive power, it is said in the near future, perhaps there would be power factor requirements of certain indicators.
- Driving mode: now prevailing in two ways: one is a constant voltage constant current source for multiple sources, each current source separately to each channel LED power supply. In this way, the combination of flexibility, all the way LED failure does not affect the LED’s work, but the cost will be slightly higher Point. The other is a direct constant current power supply, LED series or parallel operation. It has the advantage of lower cost, but flexibility is poor, but also to resolve a fault LED, LED operation does not affect other issues. These two forms coexist in a period of time. Multi-channel constant current output power supply, cost and performance will be better. Perhaps the mainstream of the future.
- Surge Protection: LED Surge capacity is relatively poor, especially the anti-reverse voltage capability. Enhance this protection is also very important. Some LED lights installed in the outdoors, such as LED lights. Since the start grid load rejection and lightning sensors, from the grid The system will invade a variety of surge, the surge can cause some damage to LED. LED drive power should therefore inhibit the surge of the invasion to protect the LED from damage ability.
- Protection: the protection of power in addition to conventional features, the best increase in the constant current output LED temperature feedback, to prevent the LED temperature is too high.
- Protection: the lighting and outdoor installation type, the power structure should be waterproof, moisture, shells and Fast.
- Drive power of power: the power of the power of our choice when we must remember to stay in power margin can not be overloaded. I am here to give you an empirical formula: power = LED lighting power supply power ⅹ 1.2.
- To comply with safety regulations and electromagnetic compatibility requirements.
LED power supply selection is very important to determine whether normal and stable throughout the project work. Therefore, there must be careful in the choice.