[SOLVED] Fan Power Consumption

[eenthusiast]

i know dis is a very basic que bt it has been intriguing me since some time

By changing the speed of a ceiling fan through the regulator, does the power consumed by it (@ the mains ) change ?

 

[srizbf]

through the regulator you are reducing the voltage to
the fan . hence the power in the fan reduces.

but due to the losses in the regulator , the power drawn from
mains is almost constant.

 

[oh_jani]

when speed is slow
power is reduce

 

[eenthusiast]

srizbf, thanx 4 d reply...bt if possible cud u answer in more detail !

 

[sudheepsrc]

the regulator is two type one is resistance type and other is electronic(using scr). But we use resistance type the speed is changed also the fan using power is change ,but the regulator drop the power .so total power always constant in case of resistence type. we using scr type we can save energy

 

[srizbf]

the regulator is normally a 'resistive' type .
you are including a resistance in series with the fan.

it is ac supply --->resistor--->fan combination.

you are dropping the voltage in resistor and apply less voltage to fan for low speed.

if you want to more speed , include less resistance .

at full speed , no series resistance and full supply voltage is across the fan.

i hope you get what you want.