Output Equation of Transformer

Output Equation

The output equation of transformer in KVA is to be related with its main dimension is called output equation.

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Output Equation of an A.C. Machine

Let,

Q = Output, KVA

ϕ_m = Main flux, wb

Bm = Maximum flux density

Ai = Net core area

Aw = Net window area

Agi = Gross (iron) core section

D = Distance between core centers

d = Diameter of circumscribing circle

Kw = Window space factor

f = Frequency

Et= Emf per turn

T_p & T_s = Number of primary & secondary turns

I_p & I_s = Primary & secondary currents

V_p & V_s = Primary & secondary voltages

a_p & a_s = Primary & secondary conductor section

Li = Mean length of flux path in iron

Lmt = Length of mean turn of transformer winding

Gi = Weight of active part of iron

Gc = Weight of copper

Pi = Specific core losses

Pc = Specific copper losses

Output Equation of Single Phase Transformer

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