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justadaftspark

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## Homework Statement

## Homework Equations

## The Attempt at a Solution

Stator Line voltage 220 164 112 88 42

Stator Line Current 6.8 5.4 3.9 3.8 3.7

Stator power 470 360 278 244 232

By plotting a suitable graph from these results, determine the total of windage and friction losses, the no load magnetising current Io (assume no load current Io is magnetising losses) and the equivalent circuit magnetising circuit parameters Ro and Xo.

I have plotted the graph and estimated that the losses for friction and windage is 220w. I am unsure as to how to calculate the magnetising current and therefore the values of Ro and Xo.I(ph) =I(line)/ROOT3 = 3.93A

Vph =V(line)/ROOT3 = 127.02v

Pph = P(line)/ROOT3 = 127.02w

cos THETA = P/V*I = 75.5deg, Lag

Ro = V/IcosTHETA =129.09Ohm

Xo = V/IsinTHETA = 33.38Ohm

Or do I replace the power value with Total losses-friction and winding losses which equals 250w

Any help in the right direction would be ace.

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