It creates a shifted phase for the motor, to make it turn in
the right direction.
The choke (inductor, ballast) limits the current flow through
the tube to the design rating for that tube size. The starter
does as the name suggests, starts the arc in the tube. Once
started, it performs no function, and could even be removed.
Note that you are posting to a heavily US-based newsgroup, and
the US uses rather different fluorescent lamp control gear to
that you find in most of the rest of the world, due to their much
lower mains voltage. It also uses terminology differently to describe
some aspects of fluorescent lamp control gear, so beware of this
if you are asking questions in a US newsgroup or reading on the
Web. I am assuming that since you seem to be based in India, you
have a standard 240V mains supply.
thank you andrew for answering my question.and you got the supply
voltage right that it is 250v in India.however speaking about
terminologies i m sure the other devices perform almost the same
functions except that they are modified for the 110v supplies in the
US.i guessed since you seem to be knowing about these devices i asked
thank you once again .god bless.
Most fans I have installed or taken down change the fan speed by putting
more or less capacitance in the circuit. Most three speed motors used for
fans or flowers use taps in the main winding. Since the "stator" is inside
the rotor in a ceiling fan there may be some advantage to eliminating the
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