Electric Motor Control
10th Edition
ISBN: 9781305177611
Author: Herman
Publisher: Cengage
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Textbook Question
Chapter 31, Problem 8SQ
At what speed can a four-pole, 240-volt, 5-hp, 50-hertz motor operate?
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Chapter 31 Solutions
Electric Motor Control
Ch. 31 - Excluding slip, at what speed (r/min) will an...Ch. 31 - What is meant by the description separate winding...Ch. 31 - Prob. 3SQCh. 31 - Prob. 4SQCh. 31 - In Figure 314, what does the broken line between...Ch. 31 - When the high button is depressed in Figure 314,...Ch. 31 - Which coils are energized immediately when the...Ch. 31 - At what speed can a four-pole, 240-volt, 5-hp,...Ch. 31 - What is meant by the compelling action produced by...Ch. 31 - Prob. 10SQ
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- If the voltage applied across the armature of a DC shunt motor is increased by 5% keeping its load current and field constant, what will be the effect on its speed? * O increase by 10 per cent O decrease by about 5 per cent increase by about 5 per cent O remain unchangedarrow_forwarddiagram, given. In a certain motor the armature resistance is 0.1 ohm. When connected to 110 volts, the armature current is 20 amp and its speed is 1,200 rpm. What is its speed when the armature takes 50 amp with the field increased 10 per cent?arrow_forwardExplain how the DC and BLDC Motor works!arrow_forward
- Kindly please solve what is ask. I want a complete and handwritten solution so that I can understand. Thank you.arrow_forwardA 115-V 4-pole shunt motor develops a back emf of 102.6 volts at no load and runs at 1,143 rpm. At full load, the speed drops to 1,110 rpm. What is the back emf developed in the armature at full load?arrow_forwardWhat would be the speed of a two-pole motor operating on a 120-volt–60-hertz power supply? Select one: A. 1800 RPM B. 1100 RPM C. 2800 RPM D. 3600 RPMarrow_forward
- Can you solve? If the Applied Voltage of a DC Shunt motor is halved with the load torque doubled, the armature current will be calculate ?arrow_forwardA 440V 75 hp shunt motor has an armature resistance of 0.185 ohms and a field resistance of 350 ohms. The current drawn at full load is 135A. What is the back emf in volts?arrow_forwardWhich of the following method is used to control the speed of DC motor above its rated speed? A)Armature control B)Voltage control C)Field control D)None of optionarrow_forward
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