The working principle of emergency led fluorescent tube
Although the working principle of Langte emergency LED fluorescent tube is relatively simple, it can automatically switch the power supply in the event of a power failure. Each method is different, but the principle is similar. When the power supply is normal, the backup battery is automatically charged and has a charging protection function. Its structure is divided into two parts. One part is led tube, the normal power supply is 220v, that is, ordinary led fluorescent tube. One part is an independent power supply system, and it also contains two parts. The first part is the inverter, its function is to realize the voltage automatic switching function. It can invert the low voltage into 220v voltage to promote the normal operation of the led tube. The second part is a battery, which is provided for the inverter to work. There are several types of batteries. Lithium batteries are more expensive, environmentally friendly and durable. Ni-MH batteries are slightly cheaper. The emergency time mainly depends on the capacity of the battery. When the capacity is large, the emergency time will be extended, but the capacity is large and the battery is expensive. So, why the price difference of emergency led tube is big because of the impact of battery. How to resolve this contradiction? The best way is to reduce the emergency power. That is, the emergency of 18w will be 3-5w, so the battery capacity will be smaller, which not only reduces the cost, but also meets the emergency time. The emergency time is usually 30 minutes, 60 minutes, 90 minutes, 120 minutes, 180 minutes and so on. It should be noted that if the emergency power supply is usually external, the capacity can be larger, the emergency time is longer, and external wiring is required, and the installation is a bit more troublesome. If the built-in power supply is used, the battery will be installed in the LED tube, the battery size will be reduced, and the emergency time will be shortened, but the installation is simple, the method of using the ordinary LED tube is the same, and the price is much cheaper. Therefore, according to the different requirements of the use occasion, choose different emergency fluorescent lamps to achieve the best cost performance.
