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The speed of a 4-pole induction motor is controlled by varying the supply frequency while maintaining the ratio of supply voltage to supply frequency
The speed of a 4-pole induction motor is controlled by varying the supply frequency while maintaining the ratio of supply voltage to supply frequency (V/f ) constant. At rated frequency of 50 Hz and rated voltage of 400 V its speed is 1440 rpm. Find the speed at 30 Hz, if the load torque is constant (B) 864 rpm (A) 882 rpm (D) 828 rpm (C) 840 rpm
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Electric Machinery
Authors: Charles Kingsley, Jr, Stephen D. Umans
6th Edition
71230106, 9780073660097, 73660094, 978-0071230100
