calculate voltage induced on a coil

by adilee
Tags: coil, induced, voltage
adilee is offline
Nov12-09, 01:53 AM
P: 1
Hi, i m new here n very poor in EE.. just want to ask that, is there any formula for us to calculate voltage induced on a coil if we have the info like the number of turns of the coil n the flux (mWb/sec)..
cos i cant get from google as well...sorry for trouble n thanks for ur guiding...
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Redbelly98 is offline
Nov12-09, 08:03 AM
Redbelly98's Avatar
P: 11,984
This is Faraday's law of induction.
V = -N (dΦ/dt)
Φ = B A
(B is the magnetic field, and A is the area of 1 loop in the coil)

For a fixed area A, this becomes
V = - N A (dB/dt)
Bob S
Bob S is offline
Nov12-09, 08:23 PM
P: 4,664
Hi adilee
It is possible to get a dc voltage out of a coil, with the addition of an op-amp, a resistor and a capacitor. If the change in the field in the coil (by flipping it 180 degrees) is 2B, the coil area is A, and the number of turns is N, then the volt-seconds is 2 NAB. Put the voltage signal into an integrator circuit, as shown in the attached thumbnails at post #9 in thread
and get a dc voltage out.
Bob S

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