What is the role of the ballast? Said the white dots
The ballast has two functions: When it starts, it generates high pressure (because of its sense of self) 2, when normal luminescence reduces voltage (due to self-inductance)
Tubes start to have a high pressure when start, ballast is a inductance, disconnect the device and muddy moment will release a high voltage, achieve the purpose of start; When run is lower than the market voltage, the regenerator is off, the ballast is equivalent to an electric reactance between the lamp and the market. The concrete principle wants to know from the electrician foundation to begin to speak, in this not detailed talk! Good luck to you!
Electronic ballast features (1) the energy saving. Fluorescent electronic ballasts, use 20 ~ 60 KHZ frequency supply tubes, more make the lamp light efficiency about 10% higher than that of power frequency (according to the length of 4 feet of tubes), and its low power consumption, make the total input power of the lamp fell about 20%, has the better energy saving effect. (2) it eliminates the stroboscopic and is more stable. Improves the visual resolution and improves the efficacy; Reducing the visual fatigue of continuous operation is beneficial to the protection of eyesight. (3) the starting point is more reliable. After the preheating lamp, the starting point is successful, avoiding multiple starting points. (4) the power factor is high. (5) stable power input and output flux: high quality product has good voltage regulation performance, the power, voltage deviation is large, can still maintain a constant light source, power, light stability, conducive to energy conservation. Extending lamp life. The constant power of high quality products and the lower current of the lamp tube, and the reliable source of the starting point can prolong the lamp's life. (7) the noise is low. High quality electronic ballast noise can be below 35db and people can't feel the noise. (8) you can adjust the light. For dimming sites, such as: the original use incandescent or halogen tungsten lamp dimming, replacing them with efficient fluorescent lamp with adjustable photoelectron ballast, which can realize the big dimming range 2% ~ 100%.
