Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 59, Problem 9SQ
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List the probable causes for the failure of a coil to pick up.
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A 120-V-rms 60-Hz sinusoidal voltage appears across a 500-turn coil. Determine the peak and rms values of the flux linking the coil.
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Chapter 59 Solutions
Electric Motor Control
Ch. 59 - Prob. 1SQCh. 59 - Why should the motor be run for a period of time...Ch. 59 - What may occur if a jumper is placed across coil M...Ch. 59 - In what position do ball-bearing motors function?Ch. 59 - Motors will operate satisfactorily at what percent...Ch. 59 - What basic sensory faculties should a...Ch. 59 - What is an orderly step-by-step procedure in...Ch. 59 - What might be a hazard if a motor is started in...Ch. 59 - Prob. 9SQCh. 59 - What are the probable causes of a noisy magnet?
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- 7. Name three factors that determine the amount of induced voltage in a coil.arrow_forwardI need the answer quicklyarrow_forward#26 The correct answer is already highlighted, explain in a very simple way why that is the correct answer. Briefly discuss its concept & provide an illustrative example.arrow_forward
- Probl The rectangular coil in the figure below is in a field B = 0.01a,T. a. Find the torque about the z axis when the coil is in the position shown and carries a current of 10 A b. Find the torque if the coil turns through 90°7 0.2m & 0.2m 1-10Aarrow_forwardThe magnetic flux linked with a single turn coil is given by the equation: 0 = 5t2 + 3t + 6. The induced emf in the coil in the fourth second will be?arrow_forward4. Given the circular coil shown below, calculate the magnitude of: a. Magnetic moment b. Torque on the coil B-23T 23 r=25 inch I=45.0Aarrow_forward
- 3. How does a split ring commutator work? * Coll rotation Coil Commutator a) Swaps the contact every full turn, so that the left-hand and right-hand arms of t coil always experience a force in the same direction. b) Swaps the contact every half turn, so that the left-hand and right-hand arms of coil do not experience a force in the same direction. c) Swaps the contact every half turn, so that the left-hand and right-hand arms of coil always experience a force in the same direction.arrow_forward1. A coil has 500 turns and a reactance of 60 ohms but negligible resistance. If it is connected to a 120 V, 60 Hz source. Calculate the following: a. The effective value of the magnetizing current, b. The peak value of lo C. The peak mmt produced by the coil. d. the peak fluxarrow_forward(B)-Explain by drawing the change in the direction of current flows through coils at the ideal case of commutation by considering coil B which is the coil under commutation as shown in the figure below. B C 5A SA 5A Armature winding 10 A Commutator 10 A Brusharrow_forward
- The magnetic flux through each turns off a 100-turn coil is (³-2) milli-webers where t is in seconds. The induced EMF at t = 2 second is?arrow_forwardIn a coil with radius of 6 cm and 400 turns, there is a magnetic field leaving in a direction perpendicular to the area of the turn with a value of de 0.232t + 4x10-5t4. The resistance of the coil is 100 2. Find the EMF after 10 s.arrow_forward5-5.When one coil of a magnetically coupled pair has a current 5.0 A the resulting fluxes ?11and ?12 are 0.2mWb and 0.4mWb, respectively. If the turns are N1= 500 and N2=1500, find L1, L2, M, and the coefficient of coupling karrow_forward
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