Halogen incandescent lamps. What is the need to switch to a low supply voltage. Scheme, description

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Halogen incandescent lamps. What is the purpose of switching to a low supply voltage. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Halogen lamps

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The transition to a low (up to 24 V) supply voltage allows you to significantly reduce the resistance of the lamp filament to achieve the same electrical power. The length of the filament decreases, which means that it delays its own radiation to a lesser extent. Due to this effect, incandescent lamps designed for low voltages have a higher light output than standard mains counterparts.

This fully applies to halogen lamps. Already in the 1990s, the first samples of the so-called low voltage models, or low voltage halogen lamps. Similar lamps had been produced before, but were mainly intended for film projection and other special applications.

The standard low voltage for powering halogen lamps is 12 V AC, somewhat less often DC and / or 6 and 24 V ratings are used. To obtain such voltages, it is mandatory to use special transformers (slang called "halogen")

Author: Koryakin-Chernyak S.L.

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