Electronic ballast component selection techniques (inductors, magnetic rings, filter electrolysis, triodes, resistors)

Inductance

1.1 Core

EE10: 10W or less EE13: 13W or less EE16: 18W or less EE19: 24W or less EE19 thickened, EE20: 30W or less EE25, EI25: 45W or less EE25 thickened EI28: 80 W or less EI33: 110 W or less and greater than 55W Two inductors are recommended Power can do 3W~~~~125W

1.2 gap, EE10 EE13 open 0.6 other can be opened at 1.0, note that the maximum gap can not exceed 1/3 of the middle length, generally small power 10W~20 W 0.4 30w~40w 0.6 60w~80w 0.8 100w~110w 1.0

1.3 Line diameter

7W ¢: 0.11 7-13W: ¢ 0.13, 13-20W: ¢ 0.2, 20-30W: ¢ 0.25, 30-60W: ¢ 0.11mm & TImes; 6 shares 60W-80W: ¢ 0.11mm & TImes; 10 shares

80W-110W: ¢0.2mm & TImes; 10 shares It is also possible to consider importing cathode current 4.5 times as square 1mm = 1A

Electronic ballast component selection techniques (inductors, magnetic rings, filter electrolysis, triodes, resistors)

2, magnetic ring

The magnetic ring is also called the pulse transformer. I mainly use 2.5K: For the 7W or less lamps, use the 8*5*3mm, 3:13:3.7-20W lamps with 10*6*3mm, 3:7:3.20-30W. The lamp uses 10*6*5mm 3:5:3, 30-80W lamp uses 10*6*5mm, 3:3:3.80-110W lamp uses 12*7*5mm, 2:2:2

3, filter electrolysis

7W or less lamps with 1.5~1.8uF, 7-11watt lamps with 1.8~2.7uF, 11-15watt lamps with 3.3uF, 15-20watt lamps with 6.8uF, 20-30watt lamps with 10uF , 30-45 watt lamp with 15uF, 45-60 watt lamp with 22uF, 60-80 watt lamp with 33 UF 80-100 watt lamp with 47uF, 100-110 watt lamp with 68uF

Pressure resistance in the 400V ~ 450V, electrolysis in the ballast, the life is relatively short, we must pay attention to select the capacity, leakage current, high temperature life.

4, triode

10W the following: 1300120W the following: 13002,30 the following: 13003, 55W the following: 13005, 85W the following 13007,110W the following: 13009

Taking into account its magnification, switching time, good pairing, triode 13001 0.82~0.92 13002 0.92~1.18 13003 1.3~1.84 should pay attention to whether to achieve the transistor standard, the magnification 15~20 20~25 25~30 can be divided into three grades, Larger magnification, the power is relatively large.

5, resistance

Transistor emitter resistance below 30W: 1/4W, 1~2Ω, 1/2W below 80W, 0.5~1Ω, 1W below 110W, 0.5Ω, base resistance of triode 6.8~~33Ω,

performance:

Transistor CE phase-shifting capacitor: It can absorb high voltage, prevent secondary breakdown and reduce reverse bias value.

Transistor CE freewheeling diode: Avoid reverse breakdown of the transistor, reducing the production of higher order oscillations in the switch.

Transistor Transistor CE high resistance: When it is turned on, it provides a midpoint voltage, which has a direct effect. It has a discharge function during operation and it has a damping effect on the resonance.

Transistor EB Diode: Avoid Breakdown of Transistor EB, Reduce Reverse Loss of Magnetic Ring

Transistor E resistance: current limiting, reverse protection of the triode.

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