ELECTRIC MACHINES: ANALYSIS AND DESIGN APPLYLNG MATLAB
The step-down autotransformer of Fig. 4.32 can be realized as an adjustable voltage source if the coils N, and N, are one continuous coil and the con- nection point for Vy is a sliding contact. Assume that such is the case and that VH 125 V while Vx = 12.5 V.
(a) If Ix 15 A, determine the currents in each section of the winding (1, and I).
(b) What is the power advantage of this adjustable autotransformer at the adjusted point for Vy when compared to a reconnected two-winding transformer with rating of 125:12.5 V, 200 VA.
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