source:other news release time:2023-06-02 Hits: Popular:led screen wholesaler
LEDs have always used DC drives, so a power adapter is needed between the municipal power and LED, that is, the LED drive power supply. Its function is to convert the exchange market into a suitable LED DC electricity. According to the power usage rules and the driving characteristics of the LED, the following points must be considered when selecting and designing the LED drive power supply:
High reliability
Especially like the drive power of LED street lights, it is installed at high altitude, it is not convenient for maintenance, and the cost of maintenance is also large.
high efficiency
LED is an energy -saving product, and the efficiency of driving power is high. It is particularly important for the structure of the power supply in the lamp. Because the luminous efficiency of LED decreases with the rise of the LED temperature, the heat dissipation of LED is very important. The efficiency of the power supply is high, its loss of weight is small, and the heat in the lamp will be small, and the temperature of the lamp is reduced. It is beneficial to delaying the light failure of LED.
High -power factor
The power factor is the requirements for the load of the power grid. Generally, electrical appliances below 70 watts have no mandatory indicators. Although a single power factor with a small power of power has little impact on the grid, everyone lights up at night. The same type of load is too concentrated, which will cause more serious pollution to the power grid. For the LED driver power of 30 watts ~ 40 watts, it is said that in the near future, there may be certain indicators requirements for power factor.
Drive method
There are two types of traffic driving: one is a constant voltage source for multiple constant stream sources, and each constant current source power supply to each LED separately. In this way, the combination is flexible, the LED failure all the way, does not affect the work of other LEDs, but the cost will be slightly higher. The other is to directly supply power supply, LED connects or connects parallel. Its advantage is that the cost is lower, but the flexibility is poor, and it must also solve the problem of a LED failure, which does not affect other LED operations. These two forms coexist for a period of time. The power supply method of multi -way constant currents will be better in terms of cost and performance. Maybe it is the mainstream direction in the future.
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