In the 1970s, a worldwide energy crisis emerged. The urgency of energy conservation has led many companies to focus on energy-saving light sources and electronic ballasts for fluorescent lamps. With the rapid development of semiconductor technology, various high-return power switching devices are emerging. It provided conditions for the development of electronic ballasts. In the late 1970s, foreign manufacturers took the lead in launching the first generation of electronic ballasts, which was a major innovation in the history of lighting development. Because of its many advantages such as energy saving, it has attracted great attention and interest from all over the world. It is considered to be an ideal product to replace the magnetic ballast. Later, some well-known enterprises have invested considerable manpower and material resources to carry out a higher level. Research and development. Due to the rapid advancement of microelectronics technology, electronic ballasts have been promoted to high performance and high reliability. Many semiconductor companies have introduced a series of products for dedicated power switching devices and control ICs. In 1984, Siemens developed active devices such as TPA4812. Power factor correction IC with a power factor of 0.99. Subsequently, some companies have successively launched integrated electronic ballasts. In 1989, the Swedish company Hulvalli successfully launched electronically adjustable ballast monolithic integrated circuit electronic ballasts, which have been promoted and applied nationwide, especially in developed countries.
China's research and development of electronic ballasts started late, the starting point of technology is low, early understanding of the difficulty and complexity of this product is insufficient, the development of special semiconductor devices has not kept up, the quality of products has not passed, and the market is extremely irregular. A large number of low-priced inferior goods were thrown to the market, causing losses to consumers and seriously damaging the image of electronic ballasts. In the late 1990s, due to the rapid development and improvement of production levels, from circuit design to electronic components, the products entered a relatively mature stage, and high-quality products entered the construction project. With the implementation of China's green lighting project, it was promoted for electronic ballasts. The application paved the way, domestic electronic ballasts will quickly catch up with the international advanced level and occupy a place in the competitive international market.
Electronic ballast knowledge for fluorescent lamps and germicidal lamps
Electronic ballast knowledge:
HID electronic ballasts use semiconductor electronic components to convert DC or low-frequency AC voltage into high-frequency AC voltage, and drive electronic control devices for low-pressure gas discharge lamps (sterilization lamps) and halogen lamps. The most widely used is the electronic ballast for fluorescent lamps.
Electronic ballasts: electronic ballasts for fluorescent lamps, electronic ballasts for high-pressure sodium lamps, and electronic ballasts for metal halide lamps. Due to the adoption of modern soft-switching inverter technology and advanced active power factor correction technology and electronic filtering measures, it has good electromagnetic compatibility and reduces the self-loss of the ballast.
Identify electronic ballasts
Remove the starter, disconnect the power supply, and test both ends of the ballast. If the ballast is older, inductive, inductive can use this method to test whether the coil is burnt out. This old-fashioned ballast is broken, generally the coil is blown, resulting in no voltage across the lamp, which will not cause the lamp to burn out. There are many situations for electronic ballasts.
The resistance values ​​of the three ballasts can be measured separately according to the method described above to see if there is a big difference to judge whether the ballast is damaged. You can also change the glow device to see if the starter that will burn can not be disconnected, and it is always in the path state. In short, use the replacement method.
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