The design of energy-saving lamp electronic ballasts is a major difficulty in the design of the lighting industry. Due to the quality of the products produced by many manufacturers, the phenomenon of “energy saving and not saving money” is caused to the users, which seriously affects the reputation of energy-saving lamps. A big part of the problem is that the quality of the ballast is not good. The quality of the ballast is firstly related to the design of the circuit. Here are some successful design experiences of relevant people in the industry for your reference.

The principle of the energy-saving lamp ballast is not difficult. It is difficult to work in the condition of high temperature and high-density component arrangement. The requirements for the matching between components are very high, and the slight deviation between the components will directly lead to the whole batch. The quality of the products is not enough. At present, there is no specific publication about the design of energy-saving lamps. I have gone through a lot of experiments in my daily work. After analyzing and arranging the experimental data of the vast sea of ​​smoke, I have summed up the ten laws of experience for energy-saving lamps. Now introduced as follows, for your reference in the design of fluorescent electronic rectifiers.

Law 1: Selection of insulation layer: Energy-saving lamps with actual power below 20 watts do not need insulation layer, and energy-saving lamps with 20 watts or more need to be equipped with air insulation layer that can convect with the outside world.

Law 2: The selection rule of the magnetic core is EE10mm for lamps below 7 watts, EE13mm for lamps below 11 watts, EE16mm for lamps below 15 watts, EE19mm for lamps below 20 watts, EE25mm for lamps below 40 watts, EE25mm for lamps below 40 watts, EI28mm for lamps below 60 watts and EI33mm for lamps below 100 watts. The rule of the core gap is: 0.4mm for lamps below 20 watts, 0.6 mm for lamps below 40 watts, and 0.8 mm for lamps below 100 watts.

Law 3: The selection rule of the pulse transformer (commonly known as magnetic ring) is: the lamp below 7 watts is made of ¢8mm, 5K magnetic ring, and is wound by electromagnetic wire at 3:11:3. The 7-20 watt lamp is made of ¢10mm, 7K magnetic ring, and is wound by 1:7:1 with electromagnetic wire. The 20-30 watt lamp is made of ¢10mm, 7K magnetic ring, and is wound by 2:3:2 with electromagnetic wire. The 30-40 watt lamp is made of ¢10mm, 7K magnetic ring, and is wound by magnetic wire at 3:3:3. The 40-50 watt lamp is made of ¢10mm, 7K magnetic ring, and is wound by 4:4:4 with electromagnetic wire. The 50-100 watt lamp is made of ¢10mm, 7K magnetic ring, and is wound by 2:3:2 with a magnetic wire.

Law 4: The selection rules for filter electrolytic capacitors are: 2.2uF for lamps below 7 watts, 3.3uF for lamps with 7-11 watts, 4.7uF for lamps with 11-15 watts, and 10uF for lamps of 15-20 watts, 20 -40uF for 40-watt lamps, 33uF for lamps of 40-60 watts, and 68uF for lamps of 60-100 watts.

Law 5: The selection rule of the lamp cap capacitor is: First, the withstand voltage value of the cap capacitor must be 1000 volts or more; secondly, the choice of the capacity is such that the lamp below 7 watts uses 152, 7-15 watts of lamps. Use 222, 15-20 watt lamps for 332, 20-26 watt lamps for 472, 26-32 watt lamps for 682, 32-40 watt lamps for 822, 40-50 watt lamps for 103, 50- A 60-watt lamp with a 123, 60-80 watt lamp and a 153, 80-100 watt lamp with a 183.

Law 6: The selection rules for triodes are: 13001 for lamps below 7 watts, 13002 for lamps with 7-15 watts, 13003 for lamps with 15-25 watts, 13005, 45-75 watts for lamps with 25-45 watts. Use 13007 for a 13007, 75-100 watt lamp.

Law 7: The selection rule of the fuse is: Considering that the current is large when the ballast is started, 1 amp for lamps below 15 watts, 1.5 amps for lamps of 15-26 watts, and 2 amps for lamps of 26-45 watts. The 45-75 watt lamp uses a 2.5 amp, 75-100 watt lamp with a 3 amp.

Law 8: The selection rule of the base resistance of the triode is: 1/4W, 22 ohms for lamps below 15 watts, 1/2W for lamps with 15-25 watts, 1/2W for lamps with 25-45 watts, 1/2W for lamps of 25-45 watts. 6.8 ohm, 45-75 watt lamp with 1/2W, 6.8 ohm, 75-100 watt lamp with 1/2W, 4.7 ohm.

Law 9: The selection rule of the triode emitter resistance is: 1/4W, 1 ohm for lamps below 15 watts, 1/2W for 1-25 watts for lamps of 15-25 watts, 1/2W for lamps of 25-45 watts. 0.5 ohm, 45-100 watt lamp with 1W, 0.5 ohm.

Law 10: The rule of use of the electromagnetic wire is that the lamp below 7 watts is used for ¢0.10mm, the lamp for 7-13 watts is used for ¢0.17mm, the lamp for 13-20 watts is used for ¢0.25mm, 20-40 watts for lamps. 0.20mm × 3 strands, 40-100 watts of lamps for ¢ 0.20mm × 8 strands.