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 |
How can i check a relay good or not?
how to detect the presence of underground cable(while digging road)etc. -give the name of instrument
oil cooled transformer
what is the function of Choke?
9 Answers Airport Electrical, Cummins, Tamco,
1ampear me kitna watts hota hai aur elcb ka pura naam kya hai
18 Answers Al Khayyat, Alpha G, BEC, Bhel, CGS, Electrical, Fiem, Firmenich, HLG Habtoor Leighton Group, Jash, Kandia, Maruti Suzuki, Minda, NTPC, ONEIC, Pace Process Controls, SMTC, SR, Sunrise Electrical, Sushil Enterprises, Suzlon, Voltage,
What is the function of Harmonics filter, and how to calculate that rating of the energy saving?
Where the Dry type tranformers are used.
i ha done my 10th with 71% ,ITI with 81% 11th with 75% 12th 43% apprentiship with 71% in SAT i secure 1390 ,TOEFL 27 i was refused four times and in all me interview visa officar told that i am not Qualify for study in USA but i completed my 12th yes i got low persentage in my 12th but i seen to much student they already got visa with them 3 or 4 backlocs so why they are refused me ?
What is online and offline ups? how does it works?
what will be the min and max voltage flow from neutral to earth?
Can we check ELCB constantly from R1 to R8 phase in 1 no DB?
I need to connect a synchronous generator to the grid using automatic synchronization and two circuit breakers (one for synchronization, one for end connection to the grid), how to determinate the required diameter of the cables?