COURSE DESCRIPTION
In this course, we will learn how to solve problems related to Electric Machines (questions and exercises).
A 220V DC shunt motor draws 10A at 1800rpm. The armature resistance is 0.2Ω and field winding resistance is 440Ω
a) What is the torque?
b) What will be the speed and line current at a torque of 20 N-m (If field current is constant) ?
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A 3φ 50Hz transformer has delta connected primary and star connected secondary, the line voltages being 22,000V and 400V respectively. The secondary has star connected balanced load at 0.8pf lagging, the line current on the primary is 5A. Determine the current in each coil of the primary and each Secondary line. What is the output of the transformer in KW ?
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