Q3/ A/ Compare between de series and shunt generator. Q3/ B/ Briefly explain the commutating process in de machine.
Q: would like to know how electromagnetism is related to wind-energy conversion systems?
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Q: ) What is a compound DC generator? a) a generator which utilizes a shunt or a series field b) a…
A: The explanation to both questions are as follows.
Q: a. Derive the following steady state equations for a DC machine: i. Tmech = KaQala Kapala Ea ii.
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Q: The external characteristic of a shunt general can be obtained directly from its characteristic. (a)…
A: 1) Open - circuit the external characteristics of a shunt generator can be obtained directly from…
Q: Question 4:What would happen if the series properties of the DC compound generato were as much as…
A: NOTE: “Since you have asked multiple question, we will solve the first question for you. If you want…
Q: 6.9 justify the following statement: if the interpole winding is left unexcited, commutation will be…
A: Ans. True
Q: Critical resistance of a self-excited generator is closely related to the speed of the machine True…
A: Critical resistance is related to self excited generators. It is the maximum resistance. At this…
Q: 5. A d.c. shunt machine has armature and field resistances of 0.025 Ω and 80 Ω respectively. When…
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Q: The dc shunt generator given its rated voltage when the field resistance is higher than critical. O…
A: We know that the critical field resistance is the highest allowable shunt field winding resistance…
Q: Kindly explain the methods of reactive power compensation in power systems.
A: The methods for reactive power compensation are nothing but the methods by which poor power factors…
Q: Starting from e = Blv, derive an expression for the induced voltage in a DC generator.
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Q: There are three commonly used excitation modes for stepper motors: full step, half step and…
A: Given the stepper-motor has 4 pole in its stator and 6 poles in its rotor. The angle between two…
Q: Write a note on capacitive compensation for power factor control.
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Q: The series field winding of DC Machine has many turns of thick wire Select one: True False
A: The shunt field winding has high resistance(R is high) and series field winding has low resistance(R…
Q: H.W/ a- What is the voltage regulation coefficient. b- What is the importance of knowing the voltage…
A: a) voltage regulation : It is a ratio of change in terminal voltage to the rated terminal voltage…
Q: The DC shunt generator with the terminal voltage 350 V, armature drop 7 V and the each brush drop 2…
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Q: root locus
A: to find the open loop transfer function of this root locus we need to identified the zeros nd poles…
Q: Comment briefly on the relationship between input and output power at varying excitation levels and…
A: Infinite Bus Bar is the bus bar where many(infinite) synchronous machines are connected. The…
Q: a. Does the slip increase as the load increases? What is the reason of this? b. What does it mean…
A: (a) Slip :- It is the difference between the synchronous speed of the motor and the shaft rotating…
Q: What is power factor correctoin?
A: Power factor correction:
Q: What can you learn about parallel and series connection in making a wind turbine?
A: Different energy sources are required in day to day life. These energy sources can be renewable or…
Q: A constant losses can be considered equal to input to a machine at no-load. * True False
A: at no load total losses are sum of copper losses , iron losses and mechanical losses. At any load…
Q: Two identical 2,000 kW alternator operates in parallel. The governor of the first machine is such…
A: It is given that: Rating of alternator=P=2000 KWFrequency drop of first machine 1=∆f1=50 Hz-48 Hz=2…
Q: ne power station has rotor of small diameter and high length other than that used in hydrop
A: A synchronous generator is also known as an alternator in which the AC supply is given to the stator…
Q: What is voltage stability? How is reactive power linked with the voltage stability in the power…
A: Voltage stability is characterized as the capacity of the power system to support fixed passable…
Q: 2. The following are the Incremental fuel cost curves of two thermal generator units, IC₁= 0.2 P₁ +…
A: Given that; The following are the Incremental fuel cost curves of two thermal generator units,…
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Q: 6. The following table gives open-circuit voltages fer different values of field current for a d.c.…
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Q: 1-Explain the principle of commutator in d.c generator.
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Q: In DC Shunt generator, the armature winding and field winding are connected in series Select one: O…
A: 1) In DC shunt generator the armature winding and field winding are connected in parallel while in…
Q: The field system is the rotating part of the DC Generator Select one: True False
A: In DC machine rectification of power (i.e. from AC to DC or viceversa ) is done by the commutator.…
Q: hine. OMod pup anh b) In rotating machines, how would the voltages be generated in windings or…
A: Since you have posted the multiple questions so we are supposed to answer the 1st one.
Q: 224 6. The following table gives open-circuit voltages fer different values of field current for a…
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Q: 5- Calculate the reactance voltage for a machine which runs at 900rpm number of commutator segments…
A: For the given data Speed of the machine = 900 rpm Number of segments = 65 Brush width = 1.74 cm…
Q: justify the following statement: if the interpole winding is left unexcited, commutation will be…
A: Ans . NO
Q: 05 Calculate the reactance voltage for a machine which runs at 900rpm number of commutator segments…
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Q: Q3. Draw the curve showing the effects of increasing load on different types of dc generators
A: Form Load characteristics of DC generators. let, V → Terminal voltageEg → Generated EMFφsh → Shunt…
Q: Choose which synchronous machine has less diameter in the structure when compared to all other…
A: Given To determine which synchronous machine has lesser diameter
Q: Explain the applications of three phase wound rotor I.M
A: Application of 3phase wound Induction motor
Q: Critical resistance of a self-excited generator is closely related to the speed of the machine True…
A: True Critical resistance is related to speed.
Q: The DC shunt generator with the terminal voltage 375 V, armature drop 7 V and the each brush drop 2…
A:
Q: Q2 : What the important characteristics of a d.c. generator explain briefly.
A: The important characteristics of DC generator are as follows: 1) Open circuit characteristics : This…
Q: True or False: In a DC Machines, variable losses should be equal to constant losses to attain…
A: Note that there are various losses that occurs in an electrical generator or the motor. The losses…
Q: Q9. What is the basic principle that a cage winding can be represented by a three-phase winding?…
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Q: The DC shunt generator with the terminal voltage 375 V, armature drop 8 V and the each brush drop 2…
A: Generator: It is an electromechanical device, that converts the mechanical energy to electrical…
Q: Explain the effect of the capacitor on the operation of the asynchronous machine as a generator.
A: An induction generator can’t work in isolation because it continuously requires reactive power from…
Q: State two reasons why a self-excited shunt dc generator may fail to build up a voltages In each…
A: A self excited shunt dc generator may fail to build up voltage due to following reasons: 1) Due to…
Q: The DC shunt generator with the terminal voltage 325 V, armature drop 8 V and the each brush drop 2…
A: 335 V is generated emf in the motor.
Q: The DC shunt generator with the terminal voltage 375 V, armature drop 6 V and the each brush drop 4…
A: In this question , we will find generated emf in dc machine.
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- A thicker wire is used in the DC series field winding than DC shunt field winding in DC machines. * O because it carries the load current. O to prevent mechanical vibrations. O to provide strength. O to produce large flux. The speed of a DC motor can be changed by varying - armature resistance circuit O flux per pole O voltage source O all of aboveQ9 / What are the function of brushes , pole and commutator in DC machineThe electrical equivalent of mechanical load in induction machine is......................... a. Rr/s b. Rr/(1-s) c. Rr d. Rr*(1-s)/s
- The armature reaction of DC machines is less under no load condition. Select one: O True O FalseThe introduction of interpoles in between the main pole improves the performance of dc machines, because .................? (A) the interpole produces additional flux to augment the developed torque (B) the flux waveform is improved with reduction in harmonics (C) the inequality of air flux on the top and bottom halves of armature is removed (D) a counter Emf is induced in coil undergoing commutationThe resistance of the field winding(copper wire) of a DC machine is 0.25 ohm at 25°C. When operating at full-load, the temperature of the winding is 75 °C. The temperature coefficient of resistance of copper is 0.00427 per °C at 0°C. Find the resistance of the field winding at full-load.
- At loaded condition, the effect of armature reaction is more in DC machines. Select one: O True False5. Two shunt generators A and B operate in parallel and their load characteristics may be taken as straight lines. The voltage of A falls from 240 V at no-load to 220 V at 200 A, while that of B falls from 245 V at no-load to 220 V at 150 A. Determine the current which each machine supplies to a common load of 300 A and the bus-bar voltage at this load.help me in these questions pls write the questions with the and by (Computer) 1-Which of the following statements INCORRECTLY explain the label in the figure about LVDT working principles? a. Secondary coils are connected in series in such a way that their output is opposing each other. b. Constant DC voltage input to primary coil. c. Displacement moves ferrous rod from central position. d. The difference of the output voltage between the two secondary voltage.==========2- Explain the working principle of the measurement system in the figure below.i. Force input that is supplied to the sensor is processed to give the response in the form of raw output signal.ii. Signal conditioner manipulated the weak signal to give a conditioned input.iii. Analog or digital indicator display the unit that gives output reading of quantity being measured.iv. Measured value is compared with the input value for further action. a. ii, iii and iv only. b. i, ii and iv only. c. i, ii and…
- A 4-pole dc machine is wound duplex lap. Find the number of parallel pathA single phase full wave AC voltage controller has a resistive load of 5 ohms and an input voltage of Vs = 220 V (RMS), 50 Hz. The delay angles of both thyristors are set to 90 degrees. The maximum power that can be delivered to the load is: Select one: a. 5.65 kW b. 9.68 kW c. 11.52 kW d. None of these) A d.c. shunt machine while running as generator develops a voltage of 240 V at 1000 rp.m. on no-load It has armature resistance of 0.52 and field resistance of 250 92. When the machine runs as motor, input to it at no-load ts 4 A at 240 V. Calculate the speed and efficiency of the machine when it runs as a motor taking 40 A at 240 V. Armature reaction weakens the field by 6%