Answer / arindam paul

skin effect occurs due to nonuniform flux linkage in the
conductor portion. thus inductance of conductor portion is
not uniform i.e. at the conductor surface inductance is low
and at centre of the conductor is maxm. so current density
at centre is minimum and at surface it is maximum. Due to
increment of frequency this effect is more pronounced.
For dc current there are no skin effect.

Answer / asar

ll electric currents generate magnetic fields that in turn
can affect the current (this is the principle behind
electric guitar pickups). In a direct current case
everything is constant and so nothing seems to happen. With
an alternating current, however, there is a delay in the
magnetic field's response to the change in current and the
'old' magnetic field tends to push the current towards the
outside of the conductor. As the frequency increases, so
does the effect until at very high frequencies the entire
current flows in a very narrow skin on the conductor--hence
the name.

Answer / subrata

Skin effect is mainly cause by circulating eddy currents. Eddy currents effectively
oppose the original current that was flowing to the center of the conductor, thus pushing it to the outer surface of the conductor.

Answer / wareagle

Skin effect is the tendency of an alternating electric
current (AC) to become distributed within a conductor such
that the current density is largest near the surface of the
conductor, and decreases with greater depths in the
conductor. The electric current flows mainly at the "skin"
of the conductor, between the outer surface and a level
called the skin depth. The skin effect causes the effective
resistance of the conductor to increase at higher
frequencies where the skin depth is smaller, thus reducing
the effective cross-section of the conductor. The skin
effect is due to opposing eddy currents induced by the
changing magnetic field resulting from the alternating
current

Answer / ch.nikhil

skin effects depends up on the dia of the conductor ... if
the dia of cndctr increases the skin efect will increase

Answer / prem kadari

The physical phenomenon of the skin effect is the diameter
of the conductor

how can we save enegry by using VFD for Resiprocating Air compressor which is having more unloading running hours

0 Answers   MRF,

What accessories required to give the motor with given circuits and do you know the ratings of those accessories?

4 Answers   Hyundai, TCS,

WHAT IS THE HIGHEST UNDERGROUND TRANSMISSION VOLTAGE IN THE WORLD?

3 Answers   Power Grid,

Would you recommend to replace all oil filled cables with xlpe cable for hv transmission with the current technolgy for xlpe cable?

0 Answers  

What is ignition module of a CAT Gas Genset G-3508 Engine, Alternator SR4B Series. HOw its checked for correct functioning.Is it repiarable or replacable?

0 Answers  

What is the differance between negative dc voltage and positive dc voltage because some circuit uses -24,-5,-12,- 15,volt dc supply

10 Answers   eLab, Hero Honda, NTPC, Suzlon, Teradyne,

3phase cable calculation formula by motor load

0 Answers  

What is cogging and crawling phenomenon in motor.

2 Answers   DAE,

WHAT IS MEANT BY SLIP , WHERE IT OCCUR

3 Answers   Suzlon,

Explain the advantages and disadvantages of hydropower plant?

0 Answers  

WHY THE +VE POLARITY OF 48V DC POWER SUPPLY IS USUALLY GROUNDED?

1 Answers   Tulip,

need to make a report. Need to choose a 3phase induction motor. Load conditions motor will operate in : Maximum Load: 30 Kw Speed: 2950 rpm Ambient temp: 20 cent Supply voltage: 440V Frequency: 50Hz need to look for the safety factor when choosing the motor, went through catalouge found a few, but dont know how to choose the safety factor allowing an extra load something above 30 KW to avoid any harm.

0 Answers