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A three-phase, 6 pole, 50Hz star connected induction motor delivers useful power 25kW while running at a speed of 950rpm. It is connected to
A three-phase, 6 pole, 50Hz star connected induction motor delivers useful power 25kW while running at a speed of 950rpm. It is connected to a supply of 400V and takes a current of 60A. Its stator resistance per phase is 0.1402. Mechanical losses are 900w. Calculate (i) Shaft torque [2 marks] (ii) Gross torque developed [2 marks] (iii) Rotor Copper losses [2 marks] (iv) Stator Copper losses [2 marks] (v) Overall efficiency if the power factor of the motor is 0.75(lagging). [2 marks]
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i Shaft torque The shaft torque is given by Ts Pun 25000950 ...
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Experiencing MIS
Authors: David M. Kroenke, Andrew Gemino, Peter Tingling
3rd Canadian Edition
133153932, 978-0132615662, 132615665, 978-0133153934
