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Existen distintos tipos de dimmers en función de la forma
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Leading-edge dimming: Regulación mediante recorte de
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de fase en el encendido). Es el empleado habitualmente en
lámparas halógenas alimentadas a través de transformado-
res electromagnéticos.
Trailing-edge dimming: Regulación mediante recorte de
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tando hacia atrás (corte de fase en el apagado). Es más
adecuado para lámparas halógenas alimentadas a través de
transformadores electrónicos.
El método de regulación Leading-edge es menos ade-
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ORV UHJXODGRUHV TXH H[LVWHQ HQ HO PHUFDGR EDVDGRV HQ HVWH
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afectando dicho circuito al arranque de los transformadores
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Ya existen en el mercado transformadores electrónicos
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regulación mediante un potenciómetro externo conectado a
sus dos terminales apropiados.
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la línea de alimentación del primario.
La vida de las lámparas halógenas se reduce cuando fun-
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nes adecuadas para que tenga lugar el ciclo del halógeno
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Different types of dimmers exist in function with the way
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Leading-edge dimming: Regulation by means of cut-off
in the wave on its rising side, from the beginning (phase cut-
off at ignition). This is habitually used in halogen lamps sup-
plied through electromagnetic transformers.
Trailing-edge dimming: Regulation by means of cut-off in
the wave on its descending side, from the end cutting back-
wards (phase cut-off at switch off). This is the most suitable
for halogen lamps supplied through electronic transformers.
The leading-edge method of regulation is the least suit-
able for electronic transformers, due to the fact that the regu-
lators that exist on the market, based on this principal, have
a circuit for eliminating the interferences generated by these
cuts in the wave, affecting said circuit at the ignition of the
electronic transformers, producing undesirable oscillations.
Electronic transformers which allow both ways of regula-
tion, and even offer regulation by means of an external po-
tentiometer connected to two suitable terminals are already
available on the market.
With electromagnetic transformers, if the regulation is to
be controlled individually, potentiometers for use in inductive
circuits are usually used, inserted in the primary supply line.
The life of halogen lamps is reduced when they operate
with dimmers due to the fact that, as they operate below their
nominal characteristics, they do not achieve suitable condi-
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the lamp does not regenerate.
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