Electrical Transformers and Rotating Machines
4th Edition
ISBN: 9781337264419
Author: Stephen L. Herman
Publisher: Cengage Learning US
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Textbook Question
Chapter 20, Problem 7RQ
The 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?
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Chapter 20 Solutions
Electrical Transformers and Rotating Machines
Ch. 20 - Prob. 1RQCh. 20 - Prob. 2RQCh. 20 - Prob. 3RQCh. 20 - A motor nameplate indicates an insulation...Ch. 20 - What is the most common NEMA design code found on...Ch. 20 - A motor develops 225 ft-lb of torque at 860 RPM....Ch. 20 - The nameplate of a motor lists the frame as 256T....Ch. 20 - A motor develops 189 ft-lb of torque at 1745 RPM....Ch. 20 - Prob. 9RQCh. 20 - A motor nameplate lists the voltage as...
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- A motor develops 225 ft-lb of torque at 860 RPM. What is the horsepower output of the motor?arrow_forward5) In the mechanism below block ( I ) is driven by the power transmission screw. Get a degree of freedom.arrow_forwardA belt-driven blower assembly is equipped with a motorthat turns a 5-in. drive pulley at a speed of 3450 rpm.The blower is turning at a speed of 1725 rpm. Determinethe size of the driven pulley.arrow_forward
- Derive the expressions for A, B, & C in the given figure with the help of clear drawing and stepwise procedure. Also find the expression for the Length of the belt drives for open and closed belt drives.arrow_forwardChains are used in gears applications while belts are used with pulley systems. Select one: O True O Falsearrow_forwardA pump is driven by an electric motor through a open type flat belt drive.Motor pulley diameter (DS) = 300 mm, Pump pulley diameter (DL) = 600 mm. The Center distance between the pulleys=1000 mm. Find the length of the belt in inchesarrow_forward
- Q1: A: If the position of a certain body was (-13) unit according to X-axis, then it is moved to be arrived (40) unit according to the same axis (X-axis). Calculate the displacement of this body.arrow_forwardWhat is the minimum pulley diameter for a 1 HP motor running at 1750 RPM?arrow_forward2. A machine shaft turning at 600 rpm is supported on bearings 20" apart. Twenty HP is supplied to the shaft through a 20" pulley located 10" to the right of the right bearing. The power is transmitted from the shaft through an 8" spur gear located at the middle of the two bearing. The pulley weighs 300 lb to provide some flywheel effect. The forces acting on the pulley and the gear are given in the diagram. The shaft material selected has an ultimate strength of 70,000 psi and a yield stress of 46,000 psi, determine: Reactions at the bearings b. Bending moment diagrams in the horizontal and vertical directions а. C. The necessary diameter in accordance with the ASME Code using Kb =1.5 and Kt = 1.5. %3D Pulley Mt 525 lb Gear 191 lb Mt 10" 10" 10" Forces on Gear 348 lb W=300 lb 116 lbarrow_forward
- The essential features of a transmission dynamometer are shown in figure below (all dimension in mm). A is the driving pulley which runs at 600 RPM. B and C are jockey pulleys mounted on a horizontal beam pivoted at D, about which point the compete beam is balanced when at rest. E is the driven pulley and all portions of the belt between the pulleys are vertical. A, B and C are each 300 mm diameter and the thickness and weight of the belt are neglected. The length DF is 750 mm. Find: 1. The value of the weight W to maintain the beam in a horizontal position when 4.5 kW is being transmitted, and 2. The value of W, when the belt just begins to slip on pulley A. the coefficient of friction being 0.2 and maximum tension in the belt 1.5 kN. Driven 15 soojade Driving pulley 127,arrow_forwardThe essential features of a transmission dynamometer are shown in figure below (all dimension in mm). A is the driving pulley which runs at 600 RPM. B and C are jockey pulleys mounted on a horizontal beam pivoted at D, about which point the compete beam is balanced when at rest. E is the driven pulley and all portions of the belt between the pulleys are vertical. A, B and C are each 300 mm diameter and the thickness and weight of the belt are neglected. The length DF is 750 mm. Find: 1. The value of the weight W to maintain the beam in a horizontal position when 4.5 kW is being transmitted, and 2. The value of W, when the belt just begins to slip on pulley A. the coefficient of friction being 0.2 and maximum tension in the belt 1.5 kN. Driven pulley IT Driving pulley D B 27-30 300-300- 127, -750- Warrow_forwardThe motor bearing shown in this figure is to fit a shaft that measures 1.625 inches in diameter. What fractional size reamer should be used to ream a hole in the motor bearing? Ream- -Motor Bearingarrow_forward
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