Ten laws of experience for electronic energy-saving lamps
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 of the author's successful design experience 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. Energy-saving lamps with more than 20 watts need to be equipped with air insulation layer that can convect with the outside world.
Law 2: The selection rule of the 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 law of the core gap is: 0. 4mm for lamps below 20 watts, 0. 6mm for lamps below 40 watts, and 0. 8 mm for lamps below 100 watts.
Law 3, pulse transformer (commonly known as magnetic ring) selection rule is: 7 watts below the lamp with ¢ 8mm, 5K magnetic ring, with electromagnetic wire according to 3:11:3 winding. The lamp of 7-20 watts is made of ¢10mm, 7K magnetic ring, and is wound by 1:7:1 with electromagnetic wire. The lamp of 20-30 watts is made of ¢10mm, 7K magnetic ring, and is wound by 2:3:2 with electromagnetic wire. The lamp of 30-40 watts is made of ¢10mm, 7K magnetic ring, and is wound by 3:3:3 with electromagnetic wire. The lamp of 40-50 watts is made of ¢10mm, 7K magnetic ring, and is wound by 4:4:4 with electromagnetic wire. The lamp of 50-100 watts is made of ¢10mm, 7K magnetic ring, and is wound by 2:3:2 with electromagnetic wire.
The law of 4, the selection rules of the filter electrolytic capacitor is: 2 watts for lamps below 7 watts, 3. 3uF for lamps with 7 to 11 watts, 4. 7uF for lamps for lamps of 11 to 15 watts, for lamps of 15 to 20 watts 10uF, 20uF for 20-40W, 33uF for 40-60W, and 68uF for 60-100W.
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; second, the choice of the capacitor capacity is such that the lamp below 750 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- The 60-watt lamp uses 123, 60-80 watts for 153, 80-100 watts for lamps 183.
The rules for the selection of the law and the triode are: 13001 for lamps below 7 watts, 13002 for lamps with 7-15 watts, 13003 for lamps with 15-25 watts, lamps with 13005, 45-75 watts for lamps of 25-45 watts. Use 13007 for the 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, the lamp below 15 watts is used for 1 amp, and the lamp of 15-26 watts is used for 1.5 amp, 26-45 watt lamp. 2 amp, 45-75 watt lamp with 2.5 amp, 75-100 watt lamp with 3 amps.
Law 8. The choice 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 choice of the emitter resistance of the triode is: 1/4W, 1 ohm for lamps below 15 watts, 1/2W for lamps with 15-25 watts, 1/2W for lamps with 25-45 watts, 0. 5 ohm, 45-100 watt lamp with 1W, 0.5 ohm.
The law of 10, the use of electromagnetic wire is that the lamp below 7 watts is used for ¢0. 10mm, 7-13 watts for lamps ¢0. 17mm, 13-20 watts for lamps ¢0. 25mm, 20-40 watts The lamp is used for 。0. 20mm×3 shares, and the lamp for 40-100 watts is used for 。0.20mm×8 shares.
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