How to improve the efficiency of the dimming system?
Dimming devices have gone through four generations: the first generation is a resistive dimmer. The second generation is transformer type dimming equipment. The third generation is an electromagnetic amplifier type dimming device. The fourth generation is a SCR dimming device. The first generation has the lowest efficiency and the fourth generation has the highest efficiency.
If the efficiency of the dimming system is not high, the power consumed by itself is considerable. Assuming that its efficiency is 96% (it seems to be a very good number), when it wants to push a 6kW load, its own power consumption is already:
6 ×(100-96%)= 0.24kW
and assuming that a dimming cabinet has 60 6kW loads, then its total power consumption is as high:
0.24 × 60 = 14.4kW
Therefore, it is important to improve the efficiency of the dimming system. It not only reduces the temperature rise of the dimming cabinet (because the temperature rise and power consumption are proportional), but also reduces the power consumption, thereby reducing operating costs. At present, the more advanced dimming system uses the latest solid switch and high efficiency.
choke coil, its efficiency is as high as 98%, which reduces the great interference caused by the sharp rise of current due to non -100 dimming. (SCR adjusts the voltage by changing the conduction angle. Its conduction time is only about 1μs. This current waveform is actually a pulse with a steep leading edge.)
Even with a very efficient dimming system, the performance and design of the cooling system is still very important. Even at 98% efficiency, for example, the power consumption itself is still as high as 7.2kW. In order to effectively discharge such a large power consumption out of the system and keep the internal components of the system working in a reasonable temperature environment, the reasonable design of the heat dissipation system cannot be ignored.
Finally, it is worth mentioning that although there is a high dimming efficiency and a good heat dissipation system, the dimming system is always a very powerful electrical system. High temperature and arcing and other phenomena can not be completely avoided. Only on the basis of high efficiency and good heat dissipation, supplemented by the necessary high temperature and fire prevention measures (such as the use of high temperature flame retardant line), can ensure the safe use of the entire dimming system.
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