hello! can anyone explain to me how a 3 speeds table fan
work? what are the factors that are controlling the speed of
a normal table fan? Is it by varying the voltage or changing
the magnetic field? would appreciate your reply :) thx in
advance.
Answers were Sorted based on User's Feedback
Answer / k.prakashchandra
By varying the voltage .The speed controller connects
resistance in series with the supply and hence the voltage
to the motor is reduced.This type speed control goes well
with the fan as the load on the motor varies with the speed
automatically.
Is This Answer Correct ? | 3 Yes | 0 No |
Answer / bala
its not by changing the voltage are flux, its by changing
frequency we can vary the speed
Is This Answer Correct ? | 1 Yes | 1 No |
If we need 4c× 50mm sq cable but it's not available so we can pull 4c×25mm sq two cables?
what is relay type VDG,CDG,VTT ect?
What is the basic principal, by which DC voltage level is increased more than the supplied AC voltage during conversion. As upto AC level it is contorrled by firing anlge but after maximum level how is it possible.Please clear picture. OR we have to supply the higher level AC?
Why have the transformer one earthing to their neutral? Why have the transformer many earthing to their body?
How can I calculate the require lumen of a room. If I use Tube Light (40 W), Or 100 W incandescent lamp. Please give detail answer.
who many types of fire explane with exmple
What are the specific gravity of fully charged and fully discharged lead-acid battery?
in a transmission line the aluminium cor is sarrounded and in between there is a another type of matrial what is that?
Why we use startor to the motor?
Approach of a cooling tower is the difference between temperatures of what factors?
What will happen to transformer if we gave 5HZ input instead of 50/60Hz??? explain with reason
1KVA transformer of different frequencies of 50hz,100hz,500hz&1000hz. which one of these transformer has big size? Give reason
16 Answers Ecil, Engineers India, MahaDiscom,