Explosion-proof LED light fixtures are lighting lamps with explosion-proof function, and factory explosion-proof light fixutures are explosion-proof light fixtures used in factories, mines or workshops.
Explosion-proof light fixtures are used in many dangerous production environments, and factory explosion-proof light fixtures usually require strict power design to achieve better security effects. So what should be paid attention to in the design of factory explosion-proof light power supply?
The characteristics of LED lighting materials determine that they are greatly affected by the environment. For example, when the temperature changes, the current of the LED will increase; when the voltage increases, the current of the LED will also increase, and so on. Long-term operation exceeding the rated current will greatly shorten the service life of the LED lamp beads. The LED constant current is to ensure that its operating current value remains unchanged when environmental factors such as temperature and voltage change.
Some power supplies on the market have poor constant current accuracy. For example, the popular recommended solution has an error of ±8%, and the constant current error is too large. The constant current accuracy is generally required to be ±3%. According to the 3% design scheme. The production power supply needs to be fine-tuned to achieve ±3% error.
Generally, the recommended working voltage of LED is 3.0-3.5V. After testing, most of them work at 3.2V, so it is more reasonable to calculate according to 3.2V. The total voltage of N lamp beads in series = 3.2*N.
Generally, the isolated power supply is made of 15W and placed in the power tube of the factory explosion-proof lamp. The transformer is very large and difficult to put in. It mainly depends on the specific situation of the space structure. Generally, the isolation can only achieve 15W, and there are very few more than 15W, and the price is very expensive. Therefore, the cost-effectiveness of isolation is not high. Generally, non-isolation is more mainstream, and the volume can be made smaller, with a minimum height of 8 mm, and isolated power supplies can also be used as space permits.
The heat dissipation scheme mainly refers to the use of factory explosion-proof lamp power beads under the condition of not overheating factory explosion-proof light fixtures, which can prolong the life. Generally, aluminum alloy is used, which is easier to dissipate heat. That is, the factory-used explosion-proof lamp power supply beads are attached to the aluminum substrate, and the external heat dissipation area is expanded as much as possible.
When choosing factory explosion-proof light fixtures, pay attention to relevant precautions to choose explosion-proof light fixtures in suitable places. explosion-proof light fixtures are lighting equipment for flammable and explosive places, and are indispensable in almost every flammable and explosive dangerous place. To ensure production safety, you must be careful when choosing explosion-proof light fixtures.