3-Assignment3

3-Assignment3 - ELECTRICAL ENGINEERING DEPARTMENT...

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ELECTRICAL ENGINEERING DEPARTMENT CALIFORNIA POLYTECHNIC STATE UNIVERSITY EE 255 Assignment #3 Problem 1: The magnetic core shown in the figure has the following parameters: . 60 , 5000 turns, 1000 N , cm 25 A , cm 10 r 2 c Hz andf l c = = = = = μ For a current of A ) cos( 5 ) ( t t i ϖ = , determine: (a) Flux in the core, (b) Flux linkage, (c) Inductance [L=157H] (d) Induced voltage rms E .[ KV ° = 90 296 E rms ] ) ( t i N - + ) ( t e Problem 2: A 3 KVA, 480:240-V, 60-Hz single-phase ideal transformer is supplying a load impedance of 15 + j20 at 240 V. Determine the load current, source current and the impedance seen by the source. [ + = 80 60 Z L j ] P roblem 3: A 2200/220-V, 60-Hz, single-phase ideal transformer is supplying a load through a line impedance of 9 + j12 . The load is a heating load with a resistance of 180 . The line is in series with the load and is connected to the 220 V side. Determine the power supplied to the load and the power supplied by the source. What is the
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3-Assignment3 - ELECTRICAL ENGINEERING DEPARTMENT...

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