OSRAM HALOTRONIC-PROFESSIONAL HTL - Manual (Page 3)

2
HALOTRONIC ® transformers are electronic transformers which re-
place conventional transformers for operating 2 V tungsten-halogen
lamps.
They have about 60 % of the volume, 5 % of the weight and 30 % of
the power loss of conventional transformers.
The diagram below shows the way in which the HALOTRONIC ® trans-
former works. The mains voltage is rectified, converted into a high-fre-
quency voltage in the chopper, converted back into an ac voltage and
fed to an output converter which converts it into a 2 V ac-voltage.
A filter ensures that radio interference standards are met and helps
make the unit immune to interference.
Block diagram
Fig.
Because HALOTRONIC ® transformers have such a low power loss,
they generate much less heat than conventional transformers.
In partial load operation, HALOTRONIC ® transformers do not produce
overvoltages so even in this mode of operation there is no reduction in
the life of the lamp.
Electronic transformers are not suitable for any other load than
low voltage halogen lamps.
1. Design and mode
of operation
230-240 V