Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar Cengage Learning
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Chapter 43, Problem 2RQ
To determine
Type of AC motor that can be directly coupled with a larger horsepower rating at low rpm
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A motor has a nameplate hp of 1 at 1736 rpm.
The torque available in lb-ft is _____. (input just the number to 1 decimal place
A motor operating at 3450 rpm and is producing a torque of 33 lb in.what is the output horsepower of the motor?
Chapter 43 Solutions
Understanding Motor Controls
Ch. 43 - What are the disadvantages of low-speed, directly...Ch. 43 - Prob. 2RQCh. 43 - What three alignment checks should be made to...Ch. 43 - Prob. 4RQCh. 43 - Induction motors should not be used below a...Ch. 43 - What is the primary reason for using a pulley...Ch. 43 - How tightly should V-belts be adjusted?Ch. 43 - Refer to Figure 436 and assume the motor is to...Ch. 43 - A machine delivered for installation has a 2-inch...
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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
- Name three factors that determine the amount of torque developed by a wound rotor induction motor.arrow_forwardA motor develops 225 ft-lb of torque at 860 RPM. What is the horsepower output of the motor?arrow_forwardThe nameplate of a motor lists the frame as 256T. What is the distance from the base of the motor to the center of the shaft?arrow_forward
- Why can a multispeed fan motor be operated at lower speed than most induction motors without harm to the motor windings?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_forwardWhat type of commutator is used with a brush-lifting repulsion-start induction-run motor?arrow_forward
- Calculate the percentage speed regulation of a motor at full load if the machine runs at 1000 rpm at no-load and the full load speed is 900 rpm.arrow_forwardA motor nameplate indicates an insulation temperature rating of F. What is the temperature rating of this insulation?arrow_forwardA 1750 rpm motor has a 3” pitch diameter drive pulley. It is driving a 9” pitch diameter pulley. What would be the rpm of the driven pulley?arrow_forward
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