Solar energy saving lamp principle of work, application prospects and its influence on infrared simultaneous interpretation system

One, the working principle of the energy-saving lamp

energy-saving lamps, also called compact fluorescent lamps ( Foreign CFL lamp) It was invented in 1978 by foreign manufacturers first, because it has high photosynthetic efficiency, Ordinary light bulb is five times) , obvious effect of energy conservation, long life, Is 8 times better than ordinary light bulbs) , small volume, convenient use, by the people all over the world and national recognition and welcome. Energy-saving lamps mainly through the ballast heat lamp filament, around 1160 k temperature, filament began to launch electronics ( Because on the filament with some electronic powder) Inelastic collision, electron collision argon atoms, argon atomic energy obtained after impact and the impact of mercury atoms, mercury atomic ionization produced after absorbing energy transition, 253. 7 nm ultraviolet radiation, ultraviolet excite phosphor luminescence, due to the fluorescent lamp filament temperature around 1160 k at work, working temperature of 2200 k - than incandescent bulbs 2700 k is much lower, so it is the life of a big increase, up to 5000 hours, because it is not the current incandescent lamp as the heating effect, and high energy conversion efficiency of phosphors, amounting to more than 50 lumens per watt. The three primary colors of 7 w energy-saving lamp brightness is equivalent to a 45 watts of incandescent lamp, and life is 8 times the ordinary incandescent bulbs.

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2 energy-saving lamps, energy-saving lamps application prospect of

the human light, electricity is the foundation of industry, all power saving reasonably. According to the relevant departments in our country, if we can put all the ordinary lights all switch to energy-saving lamp lighting, will save the national power more than 900 kilowatt-hours per year, the equivalent of the Yangtze river gezhouba hydropower generating capacity of 157 in 94. Five times as many as 5. 2 billion KWH. Our country in 1982, the first in the fudan university institute of electric light source developed SL type compact fluorescent lamps, 20 years, rapid growth of production, quality improved steadily, countries have already put it as a 'five-year' during the implementation of 'green lighting project plan the focus of the promotion products.

3, energy-saving light source harmonic interference effects on infrared simultaneous interpretation system

common fluorescent lamp because of its working frequency is low frequency 50 hz magnetic ballast, so light is people's eyes can feel it. In order to overcome this shortcoming, energy-saving lamp electronic ballast to convert 50 hz power to about 38 KHZ high frequency, so it will be reduced to feel level lights flashing. High frequency electronic ballasts at work because of nonlinear load current waveform is sine wave and harmonic generation. So what is the harmonic? Periodic non-sinusoidal power harmonic is the Fourier series decomposition, in addition to get the same as the fundamental frequency component, also get a series of is greater than the fundamental frequency component, this power is called harmonic. Harmonic frequency and the ratio of base wave frequency ( n = fn / f1) Referred to as the harmonic frequency. Harmonic is actually a disturbance variable. As shown in the figure below the distortion of the current waveform 1 - resulting from the decomposition N time harmonic.

due to the high frequency energy-saving lamp electronic ballast current produces 1 - N times the signal frequency harmonic interference, also it also produces 1 - driven light source N times the signal frequency harmonic interference, as shown in the figure below:

energy-saving light interference harmonic energy in frequency of 38 KHZ, biggest but with the increase of frequency energy attenuation is close to zero. On the market at present most of the conference system manufacturers distribution system, the infrared language USES 45 k - 1 MHZ narrowband communication band signal transmit language, and energy-saving light interference harmonic frequency point lies squarely within 45 k - 1 MHZ narrowband communication frequency band, will seriously affect the sound quality of infrared communication system and communication distance.

the best distribution system USES 2 MHZ - infrared language 6 MHZ broadband communications band signal transmit language, which effectively avoid the energy-saving lamps produced by harmonic interference, has good transmission performance, good anti-interference and sound fidelity effect is good wait for an advantage.

editor: China lighting network leaves