what happen when ac motor is connected with dc current
Answers were Sorted based on User's Feedback
Answer / anthony
1)motor won't run since the ac motors operate on
distributed winding principle in which there is a continous
shift of magnetic priority in space and since dc is not
having any phase sequence , it won't run at all .
2) the problem with dc is that the value of dc current is
always constant . hence the I*2 R losses(Watts)continue to
remain constantly at the same value and when multipied by
the time "t" , would give us a heat liberated of (I*2* R*t)
joules whch wil continue to build up with time for a
constant load drawn . this will cause burning of the
winding.
| Is This Answer Correct ? | 24 Yes | 0 No |
Answer / moody
it will not run becas the angle of rotor flux and stator
flux is not constant ....... no torque for running
stationary flux will not induced the armature also
and the heat losses will burn the winding
| Is This Answer Correct ? | 4 Yes | 1 No |
Answer / vikas tomar(from s.d.e.c. ghaz
The AC motor will not run when it is supplied by dc.
beacause as we know by the principle of electromagnetic induction that the emf will induse only when the flux changes w.r.t. time (i.e. when flux is alternating)e=d#/dt.Hence when dc is given,the flux produced would not be alternating,so no emf indused,no torque production,no motor revolution.
thanks.......................
with regards
VIKAS TOMAR.
| Is This Answer Correct ? | 1 Yes | 0 No |
What is use of 3phase instead of single phase?
12 Answers DCM, L&T,
Main Differance between Primary Distribution & Secondary Distribution Of Electricity....?
What do you understand by external characteristics of a d.c. Generator?
Why we use series reactor in power system?
9 Answers Cadbury, HEG, Uttam,
What happens instead of using 3 phase, if we give loop of single phase to all three phases ??
What is the diffrence in between Class PS & Class 5P10 for CTs
why indicated sypply only by 440V in 3-phase system.
why should small green grass ans small plant should not be there inside the transformer Yard in the factories
How to calculate MCB Breaking capacity.
megger generates D.C. voltage while earth tester generates A.C.voltage is it true? I know for megger it is D.C generator but what about earth tester?
why phase to phase voltage is 400v while phase to neutral is 220v?
typical per KM resistance values of ACSR DOG conductor for 33KV & 11KV OH system? typical per KM resistance values of XLPE 300Sq mm cable for 33KV system? typical per KM resistance values of XLPE 185Sq mm cable for 11KV system?
Civil Engineering (5086)
Mechanical Engineering (4456)
Electrical Engineering (16639)
Electronics Communications (3918)
Chemical Engineering (1095)
Aeronautical Engineering (239)
Bio Engineering (96)
Metallurgy (361)
Industrial Engineering (259)
Instrumentation (3014)
Automobile Engineering (332)
Mechatronics Engineering (97)
Marine Engineering (124)
Power Plant Engineering (172)
Textile Engineering (575)
Production Engineering (25)
Satellite Systems Engineering (106)
Engineering AllOther (1379)