Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 4, Problem 13SQ
To determine
Explain the reason for using circle to represent a coil in a motor control schematic.
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Explain how dc shunt motor is working with relevant circuit diagram
1. It is a machine that converts mechanical energy to electrical energy.
2. It is a machine that converts electrical energy to mechanical energy.
3. It is cylindrical or drum-shaped where the coils are placed and can either be lap wounded or wave wounded.
4. It connects the commutator to the other parts of the DC machine.
5. It serves as the housing of the dc machine.
6. True or False: The shunt field winding is part of the armature.
7. True or False: The long shunt compound generator is when the armature is in series with the series field winding and parallel to the shunt field winding.
8-10. Your newly built house needs an elevator. Which from the following will be best to use- series, shunt or compound motor and why?
Chapter 4 Solutions
Electric Motor Control
Ch. 4 - Identify the following symbols.Ch. 4 - Electrical symbols usually conform to which...Ch. 4 - What do the following abbreviations stand for? a....Ch. 4 - Single-pole and double-pole switch symbols are...Ch. 4 - The symbol shown is a a. polarized capacitor. b....Ch. 4 - The symbol shown is a a. normally closed float...Ch. 4 - The symbol shown is a(n) a. iron core transformer....Ch. 4 - The symbol shown is a a. normally open pressure...Ch. 4 - The symbol shown is a a. double-acting push...Ch. 4 - If you were installing the circuit in Figure 412,...
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- - In speed control of dc shunt motor, the armature voltage drop has the great effect on speedarrow_forwardCan you give me all the different types of DC motor its quite confusing coz some info says it has only 4 which is series , shunt , compount , and permanent magnet which is only under the category of brushed DC motors it doesnt include yet the brushless and the sub category however when you recognize or notice that in flowchart there are several like the one self excited etc I wonder if its an updated version though but I need you to list all of them and explain each and what category or subcategory I mean the overall DC motors even in chatgpt there are some added like universal , stepper , servo , coreless and so on. Explain each one. Pls help me if you could summarize or elaborate all at once so that it would be easy to identify or determine the overall information and additionally per category should have definition as well as the followingarrow_forwardWhy small voltage is built up immediately in rotating shunt machine eve without field excitation?arrow_forward
- What will happen if the back emf drops to zero because the external mechanical load stops the armature of the coil?arrow_forwardA 250 V d.c. shunt motor takes a current of 20 A. Resistance of shunt field winding is 200 ohm and the armature is 0.3 ohm. What is the current in the armature ?arrow_forwardWhy small voltage is built up immediately in rotating shunt machine even without field excitation ?arrow_forward
- Rotor eccentricity can be caused by A. high motor loads.B. excessive voltage.C. poor motor mounting. D. loose stator coils.arrow_forwardwhat is doubly fed induction motor how it works and also examples based on this motor.arrow_forwardWhat do you mean by 'static', 'alternating’, and 'rotating' magnetic field? Explain the significances of the rotating magnetic field in rotary machines. What are the purposes of using starter in a three-phase induction motor? With neat diagrams, explain the operation of a Wye-Delta starter for a three phase induction motor.arrow_forward
- In DC machine winding, number of commutator segments is equal to number of armature coil sides ) number of armature coils ) number of armature conductors ) number of armature turnsarrow_forwardDifferentiate the two types of armature windings in DC machines: lap winding and wave winding.arrow_forwardWhat is energy efficient induction motor and conventional indcuction motor?arrow_forward
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