EBK ELECTRICAL TRANSFORMERS AND ROTATIN
4th Edition
ISBN: 9781337025867
Author: Herman
Publisher: VST
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Textbook Question
Chapter 17, Problem 12RQ
Why can an induction motor never operate at synchronous speed?
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A three phase induction motor
operates with a rotor speed of 1440
rpm and develops a torque of
66.32NM at full load. The full load
power output is *
O 10 kw
O 9 kw
O 8 kW
O 11 kW
Name three factors that determine the torque produced by an induction motor.
7. Who among the following got a patent for an induction motor in 1888?
A. Newton
B. Torilcelli
C. Nichola Tesla
D. Thomas Edison
Chapter 17 Solutions
EBK ELECTRICAL TRANSFORMERS AND ROTATIN
Ch. 17 - Prob. 1RQCh. 17 - Prob. 2RQCh. 17 - What is synchronous speed?Ch. 17 - What two factors determine synchronous speed?Ch. 17 - Name three factors that cause the magnetic field...Ch. 17 - Name three factors that determine the torque...Ch. 17 - Is the synchronous motor an induction motor?Ch. 17 - What is the amortisseur winding?Ch. 17 - Prob. 9RQCh. 17 - Prob. 10RQ
Ch. 17 - Prob. 11RQCh. 17 - Why can an induction motor never operate at...Ch. 17 - Prob. 13RQCh. 17 - Prob. 14RQCh. 17 - Prob. 15RQCh. 17 - Prob. 16RQCh. 17 - Prob. 17RQCh. 17 - Prob. 18RQCh. 17 - Prob. 19RQCh. 17 - Prob. 20RQCh. 17 - How is the speed of a consequent pole...Ch. 17 - A three-phase squirrel-cage motor is connected to...
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- Why can a multispeed fan motor be operated at lower speed than most induction motors without harm to the motor windings?arrow_forwardWhat type of single-phase motor develops the highest starting torque?arrow_forwardWhen a repulsion-start induction-run motor reaches about 75% of rated full-load speed, it stops operating as a repulsion motor and starts operating as a squirrel-cage motor. What must be done to cause the motor to begin operating as a squirrel-cage motor?arrow_forward
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