Electrical Transformers and Rotating Machines
4th Edition
ISBN: 9781305494817
Author: Stephen L. Herman
Publisher: Cengage Learning
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Chapter 20, Problem 3RQ
To determine
Whether the person should include model number or serial number of the motor already possessed in order to purchase the exactly same motor.
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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 operating at 3450 rpm and is producing a torque of 33 lb in.what is the output horsepower of the motor?arrow_forwardIf the peak power of your electric motor occurs at a torque (Tm) of 0.001 Nm and you have a load (FL) of 1.2 Ibf to pull using a motor, gear box, and winch (rw-0.125 inches). What gear ratio would result in the load moving as fast as possible at equilibrium? Tm Motor Gear Tgb W Воx gb F.arrow_forwardDiscuss the comparative study between chain and belt drives. How are they useful in the field of mechanical engineering, give some practical examples?arrow_forward
- Question 5 The blower requires 20 kW to run at 350 rpm. The power is transmitted by a v-belt shown in Figure 4 from an electric motor. The diameter of the machine pulley is 650 mm and that of the motor pulley is 330 mm. The centre distance between the pulleys is 1.2 m. The contact angle of the belt is 150°. The safe pull in each belt is 900 N and the mass of the belt is 0.46 kg per meter length. The coefficient of friction between the belt and the pulley is 0.25. The belt should not exceed the speed of 1 800 m/min. X1 = 16 mm H= 6 mm B X2 = 7 mm Figure 4: Cross sectional view of the v-belt 5.1. Calculate the velocity of the belt in m/s. Determine the length of the belt. Calculate the belt tensions. 5.2. 5.3.arrow_forward4) A FOUR screw lifting mechanism (Similar to awesome, mind-boggling, most beautiful CAD video shown on the youtube link enclosed) is used to lift a load of 115,000 lb. (a) Identify the size of a standard Acme thread from the data table. (b) Identify the theoretical Horsepower of the motor if the platform is moving at 6 inches per second.arrow_forwardQuestion 2 Beli vifth Slack side Motor (imprut) Tight side Beli thickpess\ Centre distance Figure 2 Figure 2 shows an open flat belt drive connected to a motor and a pulley. The motor transmits 20 kw to the connect pulley of 450 mm diameter and is rotating at 850 r/min to a second pulley rotating at 400 r/min. The distance between pulley centres is approximately 2 m. The belt is 6 mm thick and has a density of 970 kg/m. The maximum stress in the belt is not to exceed 2,7 MPa. The coefficient of friction for both pulleys is 0,3. Determine: 2.1. The diameter of the second pulley. 2.2. The length of the belt. 3.3. The width of the belt taking centrifugal tension into account.arrow_forward
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