Why is the electric inductance ballast bulky and heavy electronic ballast light weight
Mainly bulb nature, high intensity discharge lamp work in low frequency 50 hz - 200 hz range has been working in 20 KHZ or higher, such as hundreds of KHZ frequency will not form the acoustic resonance, the light bulb will not flashing, can work stable. So is the presence of these frequencies. The higher the frequency, the smaller device. This is the rule of switch power supply.
Semiconductor switching frequency are usually in a few KHZ to hundreds of KHZ, which makes the materials used in the electronic ballast small and light. The inductance ballast volume is another point due to inductance ballast's big and heavy package inductance ballasts and trigger 2 parts, the trigger composed of capacitor, these will determine the volume of the do. Inside the machine and electronic ballast trigger circuit integration, simple device and circuit is very small, so small volume as a whole. Then why was working frequency 50 hz and 25 KHZ, I think I am correct, the electronic ballast has work in 50 hz, the frequency is the frequency of the light bulb by current. Select 50 hz or 25 KHZ
Well, not only large inductance ballasts, and heavy, I can only use heavy to describe. Why electronic ballast is light, so we can analyze from their principle. Pure inductance ballasts to steady labor frequency inductance to limit the current of light bulbs, electronic ballast with semiconductor materials and ferrite inductance to limit the steady current
