High performance low price LED street lamp era has arrived

I. Introduction

With the continuous improvement of luminous efficiency of white LED chip, the white light chip with more than 80 lumens per watt has become the mainstream of the market, and the lab can make more than 150 lumens per watt chip. These exciting news and facts, has made the LED street lamp and the traditional metal lamp cost-effective close to, and above the trend of traditional metal sodium. Because of the main factors restricting the popularity of LED street lamp as follows: first, there are different opinions that the performance of LED street lamp is inferior to the traditional street lamp; second, the price is too high, far more than the traditional street lamp. But what about the truth? This article NANKER LED street with the traditional street price as a contrast, supported by high performance and low price LED street time.

The design features and proprietary technology, two LED Street South

NANKER group after three and a half years of painstaking research, has successfully developed a performance is not only the leading position in the world, but also has low price, can be comparable with the traditional metal lamp, from 40 to 300 Watts series LED lamp products.

These products are used in the south of independent research and development, with complete independent intellectual property produced by the following technology:

A. flip chip or on chip integrated high power chip - the high brightness LED small chip integrated circuit flip chip technology or packaged on silicon substrate. Using the characteristics of high thermal conductivity of silicon substrate, the LED high power chip with better heat dissipation is fabricated. At present, NANKER group used lamp series series high power chip.

B. low power loss high voltage, low current constant current output LED driver scheme. The driving circuit of NANKER group and the ordinary use of the industry low voltage constant voltage (~50~60V) but not constant current switching power supply is not the same, but the high voltage NANKER group with independent intellectual property (400V) constant voltage and low current and constant current drive circuit. In the case of normal input voltage, the power loss of the power factor correction is only about 6%, that is, its power efficiency as high as 94%, is the world's best performance driver.

C. LED to solve the heat problem, NANKER group developed the world's first needle columnar radiator with independent intellectual property rights, so that the total radiation temperature than the traditional sheet radiator at 160 w 15 DEG C lower. In a simple and low-cost way to completely solve the problem of LED heat dissipation.

LED reflection cup D. NANKER group independently developed, not only solved the problem of uneven distribution of light and the LED lamp utilization coefficient of up to about 75%, the utilization coefficient refers to the light distribution in the need to measure pavement lamps.

The performance parameters of three contrast NANKER intelligent LED street lamp and metal lamp

Table 1 lists the performance NANKER group intelligent LED street lamp and metal table lamp lights. The driving circuit of LED semiconductor illumination is composed of semiconductor electronic components, which is easy to increase and change the control circuit. Therefore, to achieve further power saving function can increase the programmable timer in the drive circuit, the lamp in the use of the process can be segmented using different power, which is for example before midnight (6 am to midnight evening 12) because many pedestrians can make full rated power as 100 watts, 200 watts and 300 watts, then the middle of the night (12 pm to the next morning at 6 midnight) because fewer pedestrians can use 50% or even 30% of the rated power in order to achieve the purpose of saving. From the table we can see a 100 watt LED lamps in the light of Road area of 525 square meters of circumstances (irradiation Road 15 meters wide, 35 meters spacing of 10.8 metal poles) when the average illuminance is 10.27 road lamp with 150 watts is close, and the average illumination LED lamp 200 Watt lamp for metal 20.55 and 250 watts of close to 18, and the average illumination LED lamp 300 Watt to 30.82 is better than 400 watt metal lamp 28.8.

The electrical parameter table, a South photoelectric intelligent LED street lamp and metal sodium lamp

Project south photoelectric LED lamp metal sodium lamp

1 lamp wattage (W) 100200300150250400

2 light effect lm/w 858585120120120

3 luminaire efficiency 90% 90% 70% 70% 70% 90%

4 utilization factor of 75% 75% 45% 45% 45% 75%

5 power efficiency of 94% 94% 80% 80% 80% 94%

6 Light Road area of 15m * 35m=525 525525525525525525 M

Average road surface illuminance (1 x 2 x 3 x 4 x 5)

610.27 / 20.55 - 30.82

Average road surface illuminance (1 x 2 x 3 x 4) / 6 - 10.818 28.8

Table two comparison of energy saving, the South photoelectric intelligent LED street lamp and metal sodium lamp

Project south photoelectric LED lamp metal sodium lamp

Lamp wattage (W) 100200300150250400

7 of the real power (W) - 100200300

8 of the actual power (1 / 5) 187.5 - 312.5500

9 intelligent average power (1+ (1 x 0.5) / 2 - 75150225)

The 10 annual energy saving (degrees) (8-9) 365 / 1000492.72 x 12 x 711.75 - 1204.5

11 for each unit (RMB) 0.8 yuan 0.8 yuan 0.8 yuan -

Save electricity each year (RMB) (10 x 11) 394.18 - 569.4 963.6

3 years of saving electricity (RMB) 1182.54 - 1708.2 2890.8

Energy saving compared to four, Tainan intelligent LED street lamp and metal sodium lamp

Table two lists NANKER intelligent