LED emergency lighting take an import role in the elevator incidents

The elevator system is closely related to a personal security special equipment, special electrical complexity, an important part of its emergency lighting, emergency lighting system reliability, security elevator is particularly important. The traditional use of incandescent emergency lighting basic, but it has some drawbacks, such as power consumption, low energy efficiency, low illumination, short life.

With the enhancement of the performance of LED, as its environmental protection, energy, seismic, long life and other characteristics, as a gradual replacement of incandescent lift emergency lighting, incandescent better overcome these drawbacks. Because LED have high requirements for power supply, choose reliable, durable emergency lighting solutions and optimize power supply, not only can reduce the maintenance of the emergency lighting system, and more importantly, can improve the efficiency and reliability of the elevator system, having guarantee safe operation of elevators is of great significance.

When there is electricity, directly by the mains power supply, with AC / DC converter driving control circuit provides low-voltage DC power supply, mainly for normal maintenance: According to the basic principle of emergency backup power, LED drive power emergency lighting work should meet the following requirements LED lighting power supply, and the system comes with a spare battery; when a failure occurs, or when the mains power outage emergency backup battery power supply equipment, including LED emergency lights drive.

Since the LED drive power to require specific current and voltage to provide a stable and reliable work, so for design LED emergency lamp drive circuit is particularly important. In addition, the battery is an integrated component, independent of the circuit design. Therefore, the circuit design of the main AC / DC constant voltage driver circuit, auxiliary circuit input power options, emergency lighting and LED driver circuit consists of three modules to form.