Mathcad - 11-02

Mathcad - 11-02 - Problem 11-2: Prated := 200 kW Vrated :=...

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P arm 13.6kW = thus the losses are: P loss P arm P fieldloss + P rot + = P loss 15kW = η P rated P rated P loss + = 100% η 93.023% = with full load the generated voltage is E a V rated I a R a + = E a 534V = which would be the no-load voltage V FL V rated = V NL E a = V FL 500V = V NL 534V = VR V NL V FL - V FL = 100% VR 6.8% = Problem 11-2: P rated 200 kW = V rated 500 volt = R f 15 = R rh 35 = R a 0.085 = P rot 1200 W = V f 100 volt = The field circuit resistance is the sum of the field winding resistance and the rheostat
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