Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar Cengage Learning
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Chapter 35, Problem 4RQ
Name two methods of sensing the current flow through the shunt field.
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Chapter 35 Solutions
Understanding Motor Controls
Ch. 35 - Prob. 1RQCh. 35 - Why is this component used instead of a diode?Ch. 35 - What is a freewheeling or kickback diode?Ch. 35 - Name two methods of sensing the current flow...Ch. 35 - Prob. 5RQCh. 35 - What unit controls the voltage applied to the...Ch. 35 - What device is often used to sense motor speed?
Ch. 35 - Prob. 8RQ
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- Question 2 Calculate the amount of DC current required for the magnetic circuit given below to generate a flux density of 1.0 T in the airgap. The details are Number of turns, N = 400 The core is made up of steel, the B-H characteristic has been given below The magnetic core length, le = 500 mm The airgap length, Ig = 2 mm The cross-sectional area of the core, Ag = 100 mm² Neglect leakage and fringing. Core Cross-sectional i(1) area as Air gap Magnetic path length Figure 1 2.0 1.8 B-H Curves for Various Metals Steel 1.6 1.4 Magnetic Saturation 1.2 1.0 0.8 Iron 근 0.4 Air 0.2 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 Magnetic Field Strength - H (A/m) Figure 2 Flux Density - B (T)arrow_forwardNonearrow_forwardFollowing the procedure discussed in Chapter 7, place wire numbers on the schematic in Figure 8–7. Place corresponding wire numbers on the components shown in Figure 8–8.arrow_forward
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