If it is powered by a DC source, will there be a Back EMF generated? Why/Why Not?Obviously, there will be a higher current flowing than that of a AC supplied transformer, but I don't know why.Thanks.
Direct current (DC) is not transformed, as DC does not vary its magnetic fields
A transformer will NOT operate on DC. The winding will short out the DC supply and you will get nothing out of the other windings. A transformer works by a constantly changing magnetic field that the AC current generates. With DC you get no change in the current and no change in the magnetic field. .
No. a transformer cannot be powered by AC.because due to the steady flow of current in dc,it will not create any disturbances in the secondary coil in transformer.
I once powered my transformer from DC with LED on other end. the LED glowed for a fraction of second and then went off
A transformer uses magnetic flux changes in the primary coil for induce a voltage in the secondary coil, the relation between the voltages is given by: Vsec N2(dΨ1/dt) (Faraday's law of induction) Ψ1 k*N1*I1 Then Vsec N2(k*N1*dI1/dt) where: N1: number of turns in primary coil N2: number of turns in secondary coil Vsec: Voltage in secondary coil Ψ1: magnetic flux in primary coil I1: current in primary coil k: constant involving Reluctance and others parameters If the current in the primary coil is DC (a constant) then his derivative must be zero, then Vsec 0
