341 EE ENERGY CONVERSION
The Ohio State University Department of Electrical Engineering
EE 341
Energy Conversion Home work Set # 3
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EE 341 ENERGY CONVERSION 1. Solve Problem 2-1(text, page 133) 2-1. The secondary winding of a transformer has a terminal voltage of v S (t ) = 282.8 sin 377t V. The turns ratio of the transformer is 50:200 (a = 0.25). If the secondary current of the transformer is i S (t ) = 7.07 sin(377t 36.87 o ) A, what is the primary current of this transformer? What are its voltage regulation and efficiency? The impedances of this transformer referred to the primary side are = Req 0.05 RC = 75
X eq = 0.225
X M = 20
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EE 341 ENERGY CONVERSION 2. Solve Problem 2-3(text, page 134) 2-3. A 1000-VA 230/115-V transformer has been tested to determine its equivalent circuit. The results of the tests are shown below. Open-circuit test VOC = 230 V I OC = 0.45 A POC = 30 W Short-circuit test VSC = 13.2 V I SC = 6.0 A PSC = 20.1 W
All data given were taken from the primary side of the transformer. (a) Find the equi...