12. Start Pulse Generator
12.1 Introduction
Functionality
The purpose of the S tart Pulse Generator (SP G) is to ignite the lamp with a burst of high voltage peaks. T he SP G superimposes
high voltage pe aks onto the normal dc start-up voltage of the lamp supplied by the Lamp Power Supply. O nce the lamp is s tarted up
and illuminating, the high voltage is removed and the lamp v oltage drops to the arc voltage. The high voltage peaks are added to the
lamp voltage by a superimposing transformer which is in series with the positive connection from the LPS to the lamp. T he negative
connection from LPS to lamp is direct and is connected to the chassis at the lamp side. The full lamp current passes through the
secondary of the su perimposing transformer.
Parts
D
E
B
A
C
Image 12-1
A Black marked cable lug. Has to be connected with the negative “LAMP OUT” pin of the LPS module.
B Red marked cable lug. Has to be connected with
the positive “LAMP OUT” pin of the LPS module.
C Ferrite block.
D Negative connection pin from SPG to lamp h
ouse.
E Positive connection pin from S PG to lamp house.
R5905312 HDF W SERIES 24/01/2013 181
To Next Page
Loading...
Need help?
General
