Policy visibility
The “Lighting LED Series National Standards Publicity Conference, Product CCC Certification and Energy Conservation Certification and Technical Seminar†was held recently. The National Standardization Management Committee of the General Administration of Quality Supervision, Inspection and Quarantine was released in 2008, 2009 and 2010. 11 national LED standards for lighting and 1 industry standard compiled by the National Lighting Standardization Technical Committee.
Li Zili, senior engineer of Guangdong Provincial Product Quality Supervision and Inspection Institute, and Qin Bifang, senior engineer of Xiamen Tongshida Lighting Co., Ltd., explained the standards in detail.
Li Zili said that the provincial government plans to triple the output value of the LED industry in three years. By 2012, it will reach RMB 300 billion, which is more than the output value of the national scale (5 million yuan) in 2009. This indicates that LED industry opportunities are coming.
New rules
"Safety Requirements for LED Modules for General Lighting"
LED module cooling is the most difficult
"Bottom plate plus LED light source constitutes LED module"
Li Zili said that the LED module can be mounted with one or more LED light sources on the bottom plate of different shapes, and can also be composed of other electromechanical and optical components.
A bottom plate plus an LED light source constitutes the simplest LED module. Constant voltage, constant current, constant power, this externally provided control device is constant power, this module does not have an integral control device. "Of course, in line with the requirements of this standard, it is necessary to add some protective devices, such as fuses, to pass this standard. The light source plus fuse plus module, this is the simplest." Li Zili said.
In terms of the scope of the module's safety standards, the general requirements and safety requirements for LED modules for general lighting are specified.
Li Zili pointed out that the scope of the module includes two aspects: LED modules that operate under the same current, the same voltage, and the same power without an integral control device. In addition, it is a self-ballasted LED module with a DC power of 250V or less or a 50Hz or 60Hz AC power supply below 1000V.
"LED cooling is a tricky problem"
According to Li Zili, the heat dissipation problem of LED modules is the most difficult. The emission of LED energy has no infrared radiation, so how to ensure the heat dissipation of the LED is a very difficult problem. Because the LED conducts heat substantially by wires, the heat dissipation problem is troublesome.
"If the heat does not go out, it will lead to thermal expansion and contraction." He pointed out that to improve heat dissipation, it is necessary to improve the performance of LED light sources, especially to improve the optical power of LED chips such as LEDs. The second is to improve the performance of the package. Packaging technology is very important, packaging materials, traditional resins, silica gel - to reduce excessive reflection. Second, it is to reduce the thickness of the packaging material. In addition, the conversion efficiency of the phosphor is also increased.
How to judge whether the LED light is qualified? Li Zili explained that the heat resistance is tested by the ball pressure test: the test temperature is ±5 ° C, but the minimum is 75 ° C, the indentation diameter should not exceed 2 mm. The fire protection is tested by the 650 ° C glow wire test: glow wire 650 ° C, glow wire Act on the sample for 30s.
When judging whether the LED lamp is resistant to corrosion, pay attention to the use of the aluminum alloy. Here, Li Zili exemplified that in the second half of last year, the lighting used in a seaside golf course in Hainan Island was an international brand but it was corroded in more than a year. Because the material used is aluminum alloy. Therefore, especially in hot weather, the hot weather zone should pay more attention to this corrosion resistance.
"Performance Requirements for Self-ballasted LED Lamps for General Lighting"
"Declared value" and limited range of actual values
“Self-ballasted LED lamps have a life of less than 25,000 hours and are unqualifiedâ€
It is reported that the new national standard stipulates that the average life of self-ballasted LED lamps should be no less than 25000h. The lumen maintenance rate of ballasted LED lamps should be no less than 92% at 3000h; when the ignition point is 6000h, the lumens are maintained. The rate should not be lower than 88%; when the ignition point is 70% of the rated life, the lumen maintenance rate is not less than 70%.
Li Zili explained that if the life of a self-ballasted LED lamp is less than 25,000 hours, it is a substandard product and cannot be sold. However, it does not mean that each LED lamp is required to have such a long life, but the overall average requirement for the life of the same batch of LED lamps. If the specific one is lower than this value, the manufacturer needs to replace it free of charge.
"Not allowed to claim 100W, actually only 80W"
In terms of electrical performance, the power factor must meet the declared value. "For example, you claim that the power is 100W on the LED light package, but in fact, the power of this LED light is only 80W, which is not very kind."
Li Zili said that in terms of LED module power, when the LED module without integral control device works stably at rated voltage or rated current and rated frequency, the difference between the actual consumed power and the rated power is not more than 10%. When the self-ballasted LED module is stable under rated voltage and rated frequency, the difference between the actual power consumption and the rated power shall not exceed 15%.
"That is, if your LED lights are self-ballasted, then you claim that the actual power of 100W LED lights should be between 85W and 115W." Li Zili said, if your lamp's actual power is less than 85W or more than 115W, then your product is a substandard product.
Edit: Pony
A battery charging contact consists of a base plate, which is installed on the floor or laterally at a bracket adjacent of the AGV runway, and a current collector which is installed on the vehicle.
A Battery Charger supplies current to the base plate. Once the AGV is in charging position and the collector has made contact with the base plate, the AGV computer turns on the current.
The base plate has chamfered entry/exit ramps to facilitate smooth drive-on/drive-off of the spring loaded collector.
Battery Charging Contacts,Agv Battery Charging Support,Charging Contacts For Battery,200A Battery Charging System
Xinxiang Taihang Jiaxin Electric Tech Co., Ltd , http://www.agvchargers.com