Transformers and electronics for low-voltage halogen lamps. Scheme, description

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Halogen incandescent lamps. Transformers and electronics for low-voltage halogen lamps. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Halogen lamps

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Attention! Low voltage halogen lamps (6/12 V) must only be connected to circuits with suitable transformers. Sequential connection and other options are not allowed!

Traditional (electromagnetic) transformers are extremely simple in design and construction. They are no different from the analogs accepted in electronic practice. Transformers can be either W-shaped or toroidal.

Due to the high operating currents of the lamps, the cross section of the secondary winding wire reaches 4 mm2. Fuses of various types are usually provided in the case, as the corresponding marking informs the user.

Transformers and electronics for low-voltage halogen lamps
Rice. 5.10. Appearance of the Ш-shaped transformer

Transformers and electronics for low-voltage halogen lamps
Rice. 5.11. Appearance of a toroidal transformer

Unlike ballasts, the types of which must strictly correspond to the types of connected lamps, the principle of connecting halogen lamps is much simpler.

Required condition It consists only in the fact that the total power of all lamps does not exceed the rated power of the transformer. For example, a 60 W transformer can be connected to 12 5 W lamps, 6 10 W lamps, 3 20 W lamps, or one 35 or 50 W lamp each.

Traditional transformers can be connected to the network through dimmers for standard incandescent lamps. An exception constitute variants of circuits in which the current is rectified, since for them the primary winding of the transformer is actually a short circuit.

Author: Koryakin-Chernyak S.L.

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