Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar Cengage Learning
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Textbook Question
Chapter 43, Problem 8RQ
Refer to Figure 43–6 and assume the motor is to rotate in the opposite direction. How can the belt slack be maintained on top?
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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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- A hammer mill is driven by a High Torque (HT) AC motor. The system is used for 8 hours /day. Input speed is 870 RPM and input power is 25 HP. Nominal output speed is 310 RPM. Design a V-belt drive and specify:(a) (b) (c) (d) (e)the belt size,the sheave sizes,the number of belts, theactualoutputspeed,the center distance. Show all your calculations.arrow_forwardWhat is the Design procedure in Determining the number of V-belts required?arrow_forwardCalculate 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_forward
- What is the primary reason for using a pulley drive?arrow_forwardCan you derive the equation of the length of the belt and the angle of wrap between belt and pulley both for open belt and crossed belt.arrow_forwardList the types of belt drives and chain drives, their operating principle, and their advantages (at least one foreach type).arrow_forward
- A motor with frame size 184T has a distance from the base to the shaft center ofarrow_forwardA 1.5 kW motor is running at 1440 rev/min. It is to be connected to a stirrer running at 36 rev/min. The gearing arrangement suitable for this application is, (a) differential gear (b) helical gear (c) spur gear (d) worm geararrow_forwarda 7460 w split-phase motor running at 1750 rpm is used to drive a rotary pump. the pump should run continuously at approximately 1175 rpm. the center distance should not exceed 1118 mm. space limits the diameter of the driven pulley to 292 mm. design a. the pulley diameters, b. the belt size, and c. the number of belt required.arrow_forward
- A 7460 W split-phase motor running at 1750 rpm is used to drive a rotary pump. The pump should run continuously at approximately 1175 rpm. The center distance should not exceed 1118 mm. Space limits the diameter of the driven pulley to 292 mm. Determine: a. the pulley diameters, b. the belt size, and c. the number of belt required.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_forwardReferring to Figure 1214, assume that the normally open 2M contact located between wire numbers 23 and 29 is welded closed. Also assume that none of the motors are running. What would happen if: a. The number 2 push button was to be pressed before the number 1 push button? b. The number 1 push button was to be pressed first?arrow_forward
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