英文250W high pressure sodium lamp electronic ballast inductance ballasts and comparative analysis of performance and energy-savingHigh-pressure sodium lamp is a high intensity gas discharge lamp, and its development began in 1955. Now, high-pressure sodium lamp life of up to 10,000 hours, light efficiency is higher than 100 lm / W. High-pressure sodium lamp work issued gold white light, it has a high luminous efficiency, low power consumption, long life, transparent fog ability and so on. Is widely used in roads, highways, airports, terminals, stations, squares, industrial and mining enterprises, parks and other venues lighting. High-color high-pressure sodium lamp is mainly used in sports centers, exhibition halls, casinos, department stores and hotels and other places lighting, is widely used.The following pairs of commonly used high-pressure sodium lamp of 250W inductive and electronic ballasts for performance and energy efficiency were analyzed.First, performance comparison1.Their own power. 250W Ballast power consumption of about 22W,and with the output power increases. 250W electronic ballast power consumption of about 12W, and basically a constant value. Electronic Ballast own low power consumption, low temperature, the system efficiency.2. With the benchmark light with the light effect. Ballast with the benchmark light, its luminous efficiency is about the base and the base lights with light ballast efficiency 0.95% -0.98%. Of high frequency electronic ballasts because the current lighting, its photoelectric conversion rate is slightly higher than the inductive ballast. Another self-power small electronic ballast, making it the benchmark light after the light efficiency is about supporting the base and the base lamp ballast with 110% optical efficiency.3. Lamp life. Ballast is very difficult to start the feature is fully consistent with the lamp start-up requirements. When the input supply voltage variations and lamp aging, the lamp power fluctuations over large areas, greatly shorten the lamp life, increase the routine maintenance costs. Electronic ballasts can directly control the lamp current, in smaller start-up current, shortening the lamp start-up time. In a wide range of supply voltage variations and lamp aging, maintains constant lamp power, reducing the lamp light decline, thus greatly extending lamp life, reduce routine maintenance costs.4.Input power voltage range. On the inductance ballast, lamp power supply voltage fluctuations with the input change. When the supply voltage is high, the lamp of serious super-power (when the input voltage to 250V,some inductance ballast output power up to 380W or so), ballasts and light fever severe, greatly reducing the lamp and the lamp life. The electronic ballast with constant power output. In a wide range of supply voltage changes, be able to maintain a constant lamp power, reducing the lamp light decline, thereby significantly extending the life of lamps and lighting.5.Strobe lights problem. Due to AC 50Hz (or 60Hz) power network voltage zero-crossing of the impact of inductance ballast to produce low-frequency strobe light and produce a clear exchange of noise, easily lead to the human eye fatigue, but also moving objects can not meet the high quality of lighting and photography requirements. The high-frequency electronic ballast using high frequency electric current output lamp, high power factor boost circuit, in the middle with large-capacity DC-link filter, no low-frequency flicker problem, there is no low-frequency noise.资料来源：360毕业设计网订做论文 6. Peripheral attachment. Ballast need to activate the device and the compensation capacitor is not easy to install, reduce overall system reliability. The electronic ballast does not require any attachments, easy installation.7.The installation of ballast and light source distance requirements. High Pressure Sodium Ballast generally use an external trigger pulse, the distance between the ballast and the lamp short, unable to meet the long-term driving requirement. The high-frequency electronic ballasts using sliding-frequency lighting, electronic ballasts and the distance between the lamp can be extended to 50 meters, to facilitate ballast installation and routine maintenance.8. Harmonic content and power factor. Ballast input current waveform for the square wave and the current lags behind the voltage, input current harmonic content, it is not added when the power factor compensation capacitor is only about 0.6. Even with compensation capacitors, power factor is also very difficult to achieve 0.95or more harmonic content remains high. This has resulted in Ballast serious pollution of the grid, increase network load and increase connection fees. The high-frequency electronic ballasts with power factor correction circuit inside, so that the input current harmonic content of less than 10%,power factor is higher than 0.95,the grid basically no pollution, can reduce grid load, lower initial installation fee to use can also be used on the original inductance ballast lighting system directly compatibilizer.9. Electromagnetic compatibility problems. In addition to the low input current harmonic content, the electronic ballast can fully meet EMI and EMS requirements, thereby enhancing the reliability of the entire lighting system.10. Self-protection issues. Ballast can not be achieved to protect themselves, when the tube emerged "Rectifier effect" and near the end of life, there will be bright lights frequently, eliminate, resulting in greater loss of ballast, temperature increase. Electronic ballasts can achieve full protection against lamp open, light-side short-circuit, heat lamp, rectifier effect and the light end of life phenomena such as the blockade of electronic ballast output.11. Size and weight. 250W Ballast weight of close to 5 kg, were heavy and bulky raw materials consumed by many pairs of lamps and installation of components requiring high strength. 250W electronic ballast weight of only 1 kg, small size and easy installation.From the above analysis we can see that was significantly higher than the performance of electronic ballast inductance ballasts, electronic ballasts canfully meet the "green light" requirements, are environmentally friendly, energy-saving products.Second, comparative analysis of energy-saving1. Magnetic Ballast with full power constant output electronic ballast.(1) Inductance Ballast: Rated input voltage 220V, input power 272W, output power of 250W.(2) The full power constant output electronic ballast: Input voltage 220V, input power 262W, the output power of 250W.Comparative analysis of energy-saving: The power output the same circumstances, the use of electronic ballasts can save 10W of input power, energy-saving rate was 3.7%. If the grid voltage is increased, energy-saving electronic ballasts will be greatly improved.For example: power voltage of 250V,at this time Ballast input power 350W, electronic ballast input power of 262W,would save 90W of power, energy-saving rate of 30%.2. Inductance Ballast and low-power constant output electronic ballast(1) Inductance Ballast: Rated input voltage 220V, input power 272W, output power of 250W.(2) low-power constant output electronic ballast: For energy conservation, to extend the lamp life, while ensuring that illumination, electronic ballasts can be reduced to 80% of the output of the power output. This is, electronic ballasts rated input voltage of 220V,input power 210W,the output power of 200W.Comparative analysis of energy conservation: the use of such electronic ballasts can save input power 62W,energy saving rate of 23%. If the grid voltage is increased, energy-saving electronic ballasts will be greatly improved.For example: power voltage 250V, power of difference for the 350W - 210W = 140W, energy-saving rate of 50%.3. Inductance Ballast and automatic timing Dimming Electronic Ballast(1) Inductance Ballast: Rated input voltage 220V, input power 272W, output power of 250W.(2) In order to extend the lamp life, and further energy efficiency, while meeting the general requirements of road lighting, electronic ballasts can be reduced to the maximum output power of 80% of rated power, while at night will further reduce the power output ballast .Dimming electronic ballast strategies can be formulated according to the user's requirements, a maximum of dimming can be achieved grade 8.[For example, dimming strategy]Electronic ballast to work 12hours every night, rated input voltage of 220V. The implementation of three-dimming electronic ballast Strategy: 18:00 to 22:00 at night and 80% power output, input power 210W, output power 200W; at 22:00 to 4:00 am the next day and 50% power output , input power 134W, output power 125W; the next day 4:00 am to 6:00 am at 80% power output, input power 210W, the output power of 200W.Comparative analysis of energy conservation: the use of such electronic ballast, an hour every night could save an average input power 100W,energy-saving rate was 36.6%. If the grid voltage is increased, energy-saving electronic ballasts will be greatly improved.From the above analysis, the use of such automatic timing dimmable electronic ballasts, average power of 172W, working 12 hours a day, saving more than 1.2 degrees Ballast. In accordance with electricity 0.8yuan / kWh, 0.96yuan per day to save electricity. Through energy conservation, about a year to be able to fully recover the cost of electronic ballasts.中文250W高压钠灯电感镇流器和电子镇流器性能分析高压钠灯属于高强度气体放电灯，其发展始于1955年。
