Supose we have one 220v A.C fan.if we provide 220v D.C what
will be happen?

Answers were Sorted based on User's Feedback



Supose we have one 220v A.C fan.if we provide 220v D.C what will be happen?..

Answer / sharad kumar

In case of 220v A.C. supply, fan (induction motor) will run
since it works only on indution principle and to produce
EMF, "rate of change of flux" should be occurs which is
only possible if A.C. supply (A.C. voltage & current)is
given to the fan..
In case of DC supply, rate of change of flux will be zero,
so EMF produce is zero and there will be no torque & no
motion. on the other hand, fan will heat up & winding may
burn.

Is This Answer Correct ?    72 Yes 1 No

Supose we have one 220v A.C fan.if we provide 220v D.C what will be happen?..

Answer / ashish

In 220 V AC Fan the Single Phase Capacitor Start Capacitor
Run Induction motor is Used & Induction Motor Will Operate
only for AC Source so If we Provide the 220 V DC then The
Fan Will Not Run.

Is This Answer Correct ?    30 Yes 5 No

Supose we have one 220v A.C fan.if we provide 220v D.C what will be happen?..

Answer / infodoss

1phase or 3phase any motor operate only in ac.Because AC
supply only can produce RMF.But dc supply can not produce.
when ever to give the DC supply in AC motor the motor will
be heated and finnaly burn due to insulation failure.

Is This Answer Correct ?    23 Yes 4 No

Supose we have one 220v A.C fan.if we provide 220v D.C what will be happen?..

Answer / a.kossay

IF THIS MOTOR IS A UNIVERSAL MOTOR SO IT CAN WORK BUT THE
DC VOLTAGE LIMIT MUST BE DECREASED TO VALUE THAT WILL
SUPPLY THE POWER RATINGS OF THE AC POWER SUPPLY, IF THE
MOTOR IS INDUCTION MOTOR IT WILL NEVER WORK BECAUSE THE DC
SOURCE WILL NEVER GENERATE A ROTATING FIELD THAT INDUCTION
MOTOR NEEDS TO ROTATE ITS ROTOR

Is This Answer Correct ?    17 Yes 1 No

Supose we have one 220v A.C fan.if we provide 220v D.C what will be happen?..

Answer / suresh

in dc it produce (static magnetic flux) in AC it will
produce RMF without rotatindg flux .
it cannot run it will heated & burned

Is This Answer Correct ?    13 Yes 1 No

Supose we have one 220v A.C fan.if we provide 220v D.C what will be happen?..

Answer / achuthan

The magnetic core will get saturated and fan would burn.
Curret i(t)= voltage(t)/ resistace as a generalal case. In
caseof AC it could be considered as V/Z ( where
Z= R+j2 pi f L).In the absence of AC thre will not be
frequency " f". In addition the current would come down
only if the fan rotates. It would not rotate due to split
phase requirement etc and the stater would draw high
current. It is advised to ref some fundemental book and
understand as to how single phase motor converts electrical
energy to mechanical energy.

Is This Answer Correct ?    5 Yes 0 No

Supose we have one 220v A.C fan.if we provide 220v D.C what will be happen?..

Answer / vishvesh

the Fan will not run, because principle and construction of
DC and AC motors are different from each other, AC motor
can not run on DC supply. and heating will produce in the
winding of the AC motor. if we supply it DC voltage.

Is This Answer Correct ?    4 Yes 0 No

Supose we have one 220v A.C fan.if we provide 220v D.C what will be happen?..

Answer / sanket

FAN WILL NOT WORK . BECAUSE IT NEEDS NEGATIVE HALF CYCLE TO
COMPLETE ROTATION.

Is This Answer Correct ?    4 Yes 2 No

Supose we have one 220v A.C fan.if we provide 220v D.C what will be happen?..

Answer / jagadish

basically in induction motor XL is represented XL=2*3.14*f in dc frequency is zero so whole XL term becomes zero due to that
according to ohms law v/XL will becomes infinity so current increase and becomes short circuited

Is This Answer Correct ?    2 Yes 0 No

Supose we have one 220v A.C fan.if we provide 220v D.C what will be happen?..

Answer / don

go and consult book

Is This Answer Correct ?    2 Yes 1 No

Post New Answer

More Electrical Engineering Interview Questions

what do you mean by linear and bilateral network?

2 Answers  


why DC current not used in Transformer action?

17 Answers   Engineers India Limited,


What is the major differences between RCCB & ELCB? If we use ELCB of less sensitivity why does it trip often and can we control it from tripping?

1 Answers  


How we check vector group for a Dyn1 transformer?

6 Answers  


rating of ups??

1 Answers  






how braking & making capacity of circuit breaker are calculated?

0 Answers   Bhel,


what is meant by flywheel and its role in retardation test

0 Answers  


How to calculate the multiplying factor for energy meter with ct ratio given

0 Answers  


What is Specific Gravity of the Electrolyte used in Lead Acid Battery????What is Unit????

7 Answers   Emerson,


What is the make of breakers, transformers, generators? What are their capacities and ratings?

1 Answers  


what is current

53 Answers   Bio Enterprises, CLG, TCS,


If the capacitor feeder is switched ON without any load, is there any display in the ammeter at the incomer?

3 Answers   RTD, Welspun,


Categories
  • Civil Engineering Interview Questions Civil Engineering (5084)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4451)
  • Electrical Engineering Interview Questions Electrical Engineering (16631)
  • Electronics Communications Interview Questions Electronics Communications (3918)
  • Chemical Engineering Interview Questions Chemical Engineering (1094)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (239)
  • Bio Engineering Interview Questions Bio Engineering (96)
  • Metallurgy Interview Questions Metallurgy (361)
  • Industrial Engineering Interview Questions Industrial Engineering (259)
  • Instrumentation Interview Questions Instrumentation (3014)
  • Automobile Engineering Interview Questions Automobile Engineering (332)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (97)
  • Marine Engineering Interview Questions Marine Engineering (124)
  • Power Plant Engineering Interview Questions Power Plant Engineering (172)
  • Textile Engineering Interview Questions Textile Engineering (575)
  • Production Engineering Interview Questions Production Engineering (25)
  • Satellite Systems Engineering Interview Questions Satellite Systems Engineering (106)
  • Engineering AllOther Interview Questions Engineering AllOther (1379)