# HW 01 - Spring2011 Homework 1 Solutions 1.1 The speed in...

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ELEN 3441 – Fundamentals of Power Engineering Spring 2011 Page | 1 Homework 1 – Solutions 1.1. The speed in radians per second is: 1800 60 rad s ωπ = 2 =188.5 1.2. The mechanical power supplied to the load is: 1.3. There are three regions in this core. The top and bottom form one region, the left side forms a second region, and the right side forms a third region. If we assume that the mean path length of the flux is in the center of each leg of the core, and if we ignore spreading at the corners of the core, then the path lengths are l 1 = 2(27.5 cm) = 55 cm, l 2 = 30 cm, and l 3 = 30 cm. The reluctances of these regions are: The total reluctance is thus and the magnetomotive force required to produce a flux of 0.003 Wb is and the required current is The flux density on the top of the core is The flux density on the right side of the core is

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ELEN 3441 – Fundamentals of Power Engineering Spring 2011 Page | 2 1.4. The induced voltage on this wire can be calculated from the equation shown below. The
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## This note was uploaded on 09/21/2011 for the course EE ee taught by Professor Ee during the Spring '10 term at Istanbul Technical University.

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HW 01 - Spring2011 Homework 1 Solutions 1.1 The speed in...

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