Q:What role does the light controller and driver play in the LED street light component?

At present, the pulse drive chip is powered by a high frequency pulse generator output interface to the LED lamp. Because the pulse signal frequency is very high, so the human eye can not feel the LED strobe, so this method meets the visual needs, and on the one hand, effectively save the power output. Also, the frequency of this type of chip can generally be controlled by an external interface. However, the current frequency of this type of chip is generally in the range of 100KHz~500KHz. So the current drive capability is only suitable for low power applications. However, I believe that in the near future will be elevated to high-power LED driver occasions.

Q:Technical requirements for LED street lamps

The technology is mature day by day, and the efficiency of light source has reached over 100lm/W, which makes it possible to save energy in urban street lighting. LED street lamps, especially large power LED street lamps, are attacking the traditional street lamp market at a tremendous speed.High power LED street lamp, as its name suggests, is power greater than 30 watts, using a new type of LED semiconductor light street lamps. The standard is generally the illuminance uniformity of the road surface, which conforms to the illumination of the road. The actual 1/2 center spot reaches 25LUX, and the 1/4 center light intensity reaches 15LUX, the minimum light intensity is 4LUX at 16 meters, and the overlap light intensity is about 6LUX. Refers to the use of solar panels for the supply of power LED street lamps. The conversion rate of 1. light is 17%, the solar energy per square meter is 1000W, and the actual utilization efficiency is 170W

Q:Is there any national standard for surface coating of LED street lamp?

At present, the national standard does not mention surface coating, only in accordance with customer needs.

Q:LED street lights are different from high pressure sodium lamps (both street lamps), as well as superior power consumption

At present, the most mature street light source, relative to the LED lamp, is not high enough for the use of the environment

Q:What is the active power of LED street lamp? What is the relationship between input voltage and current and power?

Here, we define the phase angle advance as positive, and the phase angle lag as negative. The actual load is resistance, inductance, capacitance inductance capacitance of three types of complex, composite after referred to as "impedance", written in mathematical is: Z= R+j. where R is the resistance impedance, XL inductance, XC capacitance. If > 0, known as the "perceptual load"; conversely, if < 0 called capacitive load. Alternating current through the inductive load, the phase voltage of the alternating current phase advance; alternating current through the capacitive load, the lag phase alternating current AC voltage; electrical engineering definition of the power factor angle phi angle of power factor angle phi Cos phi is called the cosine value of power factor. For resistive load, the voltage and current of the phase difference of 0 degrees, therefore, the power factor of the circuit is 1 of the maximum; and pure inductance circuit, voltage and current phase difference of 90 degrees, and is a leading current voltage; in pure capacitance circuit, voltage and current phase difference is - 90 degrees. The current leading voltage. In the latter two circuits, the power factor is zero. For a general load circuit, the power factor is between 0 and 1. By mathematical impedance Z=, R+, J, if XL = XC, then Z= R, that is, impedance Z becomes a pure resistor, power factor is equal to 1.

Q:Constraints on LED street lights

Maintenance problem. High pressure sodium lamp is good for maintenance. As long as the lamp is scrubbed, it is not necessary to replace it. The light source is changed once every 4 years, which is very convenient. And LED street lamps, involving LED tubes, modules (including lenses, etc.), power devices, etc., components and components of the possibility of greater damage, maintenance difficulties, it is possible to replace the whole, higher costs. High price: LED street price is 2-5 times that of high pressure sodium lamp, even if the power consumption of LED lamp is only 1/2 HPS, but because the price is much higher than that of high pressure sodium lamp, high pressure sodium lamp is replaced by LED cost recovery cycle will still be very long;

Q:What is the price of the LED street lamp from 30W to 60W? What are the advantages of the LED street lamp?

LED street lamp with the conventional high-pressure sodium street lamp is different, the light source of high power LED lamp with low voltage DC power supply, by the synthesis of GaN based blue LED and yellow fluorescent powder, white LED, with high efficiency, safety, energy saving, environmental protection, long life, fast response, high color rendering index unique advantages, can be widely used in city road lighting. The outer cover can be made of PC tube, high temperature resistance up to 135 degrees, low temperature resistance up to -45 degrees.

Q:What is the distance between the usual street lights?

60 watt LED lamp holder, about 6 meters light pole, 15-18 meters apart; 8 meters light pole is spaced at 20-24 meters, 12 meters, the lamp post is 32-36 meters apart. Data is for reference only.

Q:Why is the higher the current, the lower the light efficiency?

What I know is: junction thermal resistance, spectral distribution drift

Q:What is the LED Street pressure balancing respirator?

Is to solve the problem of pressure imbalance, improve the stability of lamps and lanterns.