Free technical library
Halogen incandescent lamps. Extension of service life and adjustment of brightness of a luminescence. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Halogen lamps
Comments on the article
For extending the service life of high-voltage GLN, powered directly from a 220 V network, a simple device on a specialized microcircuit of the K1182PM1R (KR1182PM1) phase regulator will help.
The fact is that in a cold state, the resistance of the lamp spiral is 10 times less than in a heated state. Therefore, the starting current of the GLN with a power of, for example, 100 W can reach 7 A. After heating the spiral, which occurs over several half-cycles of the mains voltage, the current decreases to the operating one.
It is this moment of launch that is sometimes destructive to light bulbs. Over time, the lamp coil wears out, becomes thinner, acquires inhomogeneities in its structure. The spiral becomes more sensitive to such overloads when turned on, respectively, the likelihood of its burnout increases.
It is possible to facilitate the conditions for starting the cold coil of the GLN and thereby reduce the likelihood of its burnout. To do this, it is necessary to apply the supply voltage to the lamp not with full, but with a gradually increasing amplitude.
As a result, by the time the full amplitude is applied, the lamp coil will have time to fully warm up and switch to normal operation.
Microcircuit of the phase regulator K1182PM1R (KR1182PM1) designed to smoothly turn on / off incandescent lamps or to adjust the brightness of their glow. The maximum working power is 150 watts. It is possible to significantly increase the power of the connected load by applying external triac. The IC is made in a standard DIP 16 package.
The appearance of the device is shown in fig. 5.19.
Rice. 5.19. Appearance of the GLN soft ignition device
IC K1182PM1R (Fig. 5.20, Fig. 5.21) allows, by gradually increasing the phase angle of switching on, to increase the voltage supplied to the lamp. In this case, the spiral has time to warm up to the maximum temperature by the time the full voltage is applied. As a result, the probability of failure of the lamp spiral is reduced.
Rice. 5.20. Typical switching circuit
Rice. 5.21. Schematic diagrams of dimming devices
Pins 3 and 6 of IC DA1 are designed to connect the control circuit (C3=100 uF 16 V, R1=3,1 kOhm, SW1) with a phase regulator. C1 \u2d C1 \u10d 3 μF 1 V. The lamp soft-on time depends on the capacitance of the capacitor C1, and the soft-off time depends on the resistance of the resistor RXNUMX. The values of these elements can be chosen independently. With the ratings shown in the diagram, the turn-on and turn-off times are approximately XNUMX s.
Author: Koryakin-Chernyak S.L.
See other articles Section Halogen lamps.
Read and write useful comments on this article.
<< Back
Latest news of science and technology, new electronics:
The world's tallest astronomical observatory opened
04.05.2024
Exploring space and its mysteries is a task that attracts the attention of astronomers from all over the world. In the fresh air of the high mountains, far from city light pollution, the stars and planets reveal their secrets with greater clarity. A new page is opening in the history of astronomy with the opening of the world's highest astronomical observatory - the Atacama Observatory of the University of Tokyo. The Atacama Observatory, located at an altitude of 5640 meters above sea level, opens up new opportunities for astronomers in the study of space. This site has become the highest location for a ground-based telescope, providing researchers with a unique tool for studying infrared waves in the Universe. Although the high altitude location provides clearer skies and less interference from the atmosphere, building an observatory on a high mountain poses enormous difficulties and challenges. However, despite the difficulties, the new observatory opens up broad research prospects for astronomers. ... >>
Controlling objects using air currents
04.05.2024
The development of robotics continues to open up new prospects for us in the field of automation and control of various objects. Recently, Finnish scientists presented an innovative approach to controlling humanoid robots using air currents. This method promises to revolutionize the way objects are manipulated and open new horizons in the field of robotics. The idea of controlling objects using air currents is not new, but until recently, implementing such concepts remained a challenge. Finnish researchers have developed an innovative method that allows robots to manipulate objects using special air jets as "air fingers". The air flow control algorithm, developed by a team of specialists, is based on a thorough study of the movement of objects in the air flow. The air jet control system, carried out using special motors, allows you to direct objects without resorting to physical ... >>
Purebred dogs get sick no more often than purebred dogs
03.05.2024
Caring for the health of our pets is an important aspect of the life of every dog owner. However, there is a common assumption that purebred dogs are more susceptible to diseases compared to mixed dogs. New research led by researchers at the Texas School of Veterinary Medicine and Biomedical Sciences brings new perspective to this question. A study conducted by the Dog Aging Project (DAP) of more than 27 companion dogs found that purebred and mixed dogs were generally equally likely to experience various diseases. Although some breeds may be more susceptible to certain diseases, the overall diagnosis rate is virtually the same between both groups. The Dog Aging Project's chief veterinarian, Dr. Keith Creevy, notes that there are several well-known diseases that are more common in certain breeds of dogs, which supports the notion that purebred dogs are more susceptible to disease. ... >>
| Random news from the Archive Planes against pigeons
16.06.2000
British biologists suspect that "thunder" from planes crossing the sound barrier is causing carrier pigeons to go astray.
According to one hypothesis, pigeons use infrasounds that are not audible to humans, created by sea waves and surf, for navigation. Sonic booms from jet aircraft temporarily stun the birds, after which they lose their bearings.
So, in June 1997, 60 thousand English pigeons were released from Nantes (France), but almost a third did not return home, and the rest were late. It turned out that their flight coincided with the flight of the supersonic Concorde.
|
Other interesting news:
▪ Hangover pills
▪ 64MP ISOCELL Bright GW1 sensor for smartphones
▪ Flowers and the vision of bees
▪ Wheelbarrow with legs
▪ Bats don't get diabetes
News feed of science and technology, new electronics
Interesting materials of the Free Technical Library:
▪ site section Digital technology. Article selection
▪ article by Ludwig van Beethoven. Famous aphorisms
▪ article What keeps a duck afloat? Detailed answer
▪ article Performance of work in a physical laboratory. Standard instruction on labor protection
▪ article Recommendations for the assembly and operation of elements and modules of solar panels. Encyclopedia of radio electronics and electrical engineering
▪ article Bulgarian proverbs and sayings. Large selection
Leave your comment on this article:
All languages of this page
Home page | Library | Articles | Website map | Site Reviews
www.diagram.com.ua
2000-2024
Arabic
Bengali
Chinese
English
French
German
Hebrew
Hindi
Italian
Japanese
Korean
Malay
Polish
Portuguese
Spanish
Turkish
Ukrainian
Vietnamese