Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 42, Problem 9SQ
How does the AC coil of the PFR receive the induced field current without receiving the full field current strength?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
If the output voltage across the transformer secondary coil is Vm AC volt.
a- Give a circuit to covert the Vm AC volt. to double Vm DC volt.
b- Determine the voltage across each capacitor during the positive half cycle of the AC signal.
c- Determine the voltage across each capacitor during the negative half cycle of the AC signal.
Which of the following could dictate the level to which the AC signal can be adjusted?
a.
Bias
b.
Resistance of the load resistor
c.
Capacitor and bias
d.
Capacitor
Construct a Coil Winding (Armature winding) detailed, with these following descriptions....
4 poles, 26 conductors, double layer, simplex WAVE winding
Chapter 42 Solutions
Electric Motor Control
Ch. 42 - What are the two basic methods of automatically...Ch. 42 - What is an out-of-step relay?Ch. 42 - Why is an out-of-step relay used on automatic...Ch. 42 - Under what conditions will the out-of-step relay...Ch. 42 - What is the last control contact that closes on a...Ch. 42 - What influence do both of the polarized field...Ch. 42 - Prob. 7SQCh. 42 - Approximately how much time (in terms of...Ch. 42 - How does the AC coil of the PFR receive the...Ch. 42 - Why is a control relay (CR1) used in Figure 426?...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Why is the conduction angle greater with an inductive load than with a purely resistive load? Also, what point in a single-phase ac waveform is used as a reference point for timing the thyristor gate pulses?arrow_forward4. Explain the relationship between back emf E, terminal voltage V and coil voltage drop IR in DC motor and generator respectively. i. Describe how the field strength affect the performance of DC motor and generator. ii. Explain how an external resister changes the DC motor and generator performance.arrow_forwardAnswer is 2.93 hz. Take No. Of poles = 2.arrow_forward
- A DC machine with 2 poles, wave winded (retrogressive) (two layers) with 18 slots, the values of pole pitch and commutator pitch arearrow_forwardwhat is a difference between AC AND DC load linearrow_forwardWhat is use of solenoid coil in the pressure to converter? a. To produce magnetic field in the LVDT b. To change the LVDT output c. To bring back the pivoted beam normal position d. To produce linear displacement in bellowsarrow_forward
- The single - phase ac voltage controller with inductive load. Plot the waveform of output voltage and voltage in each thyristor if the B = 10 %3D degree and delay angle (alpha) in both thyristor is 1- (30 degrees) 2- (90 degrees) 3- (120 degrees)arrow_forwardb) What are the equivalent ac circuit models of an ideal DC voltage and current source?arrow_forwardWhy the frequency will double when we rectify an ac input to dc output at the ripple factor ?arrow_forward
- The .. of the hysteresis loop is a measure of energy ..... lost per cycle a) area. b) Type. c) Frequency d) No one of the above. Fringing effect is a phenomena occurs in . a) Transformers. b) Electrical field. c) Air gap d) All of the above.arrow_forwardThe per phase dc armature resistance of an alternator is 0.5 0. The effective ac armature resistance would be about?arrow_forwardThe OCC is measured by increasing the fieldcurrent in steps from zero to some maximum value, and recording the corresponding values of armature emf. If now the current is decreased from maximum to zero, the emf values will be different; why?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Power System Analysis and Design (MindTap Course ...Electrical EngineeringISBN:9781305632134Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. SarmaPublisher:Cengage Learning
Power System Analysis and Design (MindTap Course ...
Electrical Engineering
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:Cengage Learning
02 - Sinusoidal AC Voltage Sources in Circuits, Part 1; Author: Math and Science;https://www.youtube.com/watch?v=8zMiIHVMfaw;License: Standard Youtube License