What is the purpose of starter and choke in tube light?
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Answer Posted / bobcat_rob_oman
The starter is used to have a high starting current just to
ignite or excite the fluorogas inside the tube, (to make
and break). then the choke is used to maintain the required
current needed by the gas to maintain its fluorescence.
This is becuase the supply is AC signal, (max-min-max min)
the choke will store energy during rising of current from
the source, then when the current is going to minimum
swing, the choke relesaes its energy therby giving current
to the lamp, until the next cicle again of rising current
from the AC source, it will store again energy in the form
of magnetic field. ( inductors are used for current
regulator- means it opposes change in current in the
circuit).
Try to use DC source and you dont need inductor anymore..
thatis why ballast are being replaced now by electronic
ballast, which is actually a rectifier circuit to output
stable DC current going to the fluorescent lamp. the
purpose of this is to eliminate the reactive power received
by the inductor ballast, which save extra KVA capacity of
the electrical system
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