If you need something to solve the problem you can make assumption.Please help m

Question

If you need something to solve the problem you can make assumption.Please help me ..

1. Given the transformer system shown in Figure below. At t 0 s, an primary voltage of 50 v is applied. The secondary is open-circuited. Under this condition in 50(1-e at t ls, the primary circuit is suddenly open circuited (ii goes from 31.6 A to 0 instantaneously). At the same instant the secondary is short-circuited (iz goes instantantly from 0 to 3 1.6 A) The air gap distance stays fixed. a) Determine piecewise expressions for Wr, Wel, Wm that are valid for t 20. You may leave the expressions in integral form. b) Determine the voltage induced on coil 1 at t 1.3 s. c) Determine the force between iron segments at t 0.01 s airgap Imm 1 ohm 1 ohm 12 VI 10 Turns 100 Tums Leakage inductances are 0 IH Figure 1

Explanation / Answer

at t=0

Vi=50 V

Ii=50(1 - e^-t) at t=1s

e=2.67

Ii=50( 1 - e^-1)

Ii=50*0.62546

Ii=31.27 A

a) What is Wf,W el and Wm denotes ??????

b)induced emf at 1= voltage induced in the coil 1=e1 = - L (d Ii/dt), L= 1 Henry

Ii=50(1 - e^-t) at t=1.3 sec

e1=-1*50*(1 - e^-1.3) *1=36.375 V

C) magneto motive Force between the iron segment

=Ii* N where N is the number of turns 10

F=Ii*10=50*(1 - e^-0.01) *10=0.09950 A

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