(57) A device for powering, controlling and commanding lamps (6) of plants (1) for drying
painted products (2), comprising a circuit (8) for supplying power to the lamps (6)
at a determined value of power, which comprises a magnetic amplifier (27) connected
to the circuit (8), first sensors (15) able to measure the value of the electrical
parameters of the circuit (8), second sensors (18) able to measure the value of the
working parameters of the lamp (6), a control and command unit (24) connected at the
input to said first and second sensors (15, 18) and at the output to the magnetic
amplifier (27); the unit (24) being able continuously to monitor the signals coming
from said first and second sensors (15, 18) comparing them with related pre-set reference
values and, every time a variation of the aforementioned parameters occurs, being
able to send a respective proportional signal to the amplifier (27) which varies its
variable impedance (31) proportionately to said received signal, thereby contrasting
in the circuit (8) the variation in the parameters, constantly to maintain the efficiency
of the lamp (6) at a determined value.
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