EBK ELECTRICAL TRANSFORMERS AND ROTATIN
4th Edition
ISBN: 9781337025867
Author: Herman
Publisher: VST
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Question
Chapter 21, Problem 2RQ
To determine
The rating used to find the full load running current of a torque motor.
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Name three factors that determine the torque produced by an induction motor.
Find the horsepower rating of a motor running at 1,500 rpm and developing a torque of 105 lb–ft.
(a). 22 (b). 28
(c). 30 (d). 36
The reason why the starting torque of a series motor is higher than a shunt motor is
because the series motor has
O more current flowing through its armature
O a stronger net magnetic field around both coils during the inrush of stator current
Chapter 21 Solutions
EBK ELECTRICAL TRANSFORMERS AND ROTATIN
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- When 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_forwardA motor develops 225 ft-lb of torque at 860 RPM. What is the horsepower output of the motor?arrow_forwardWhat type of single-phase motor develops the highest starting torque?arrow_forward
- A motor develops 189 ft-lb of torque at 1745 RPM. What is the horse-power output of the motor?arrow_forwardName three factors that determine the amount of torque developed by a wound rotor induction motor.arrow_forwardWhat type of commutator is used with a brush-lifting repulsion-start induction-run motor?arrow_forward
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