4- Why should the terminal voltage drop more in the case of shunt generator thần in the case of separately excited generator as the load current is increased?
Q: How can the speed effect on the No Load characteristic And the external characteristic Of the shunt…
A: No load characteristics is also called magnetic characteristics. This characteristics shows the…
Q: Which of the following factor is responsible for negative voltage regulation of a DC generator?…
A: Voltage Regulation :- It is defined as the ratio of change in full-load voltage from no-load voltage…
Q: Explain the external characteristis of a shunt generator and state the reasons for the drop in its…
A:
Q: Is there a great difference between long and short - shunt compound generator , show that ?
A: The main difference between long shunt compound generator and short shunt compound generator: Long…
Q: In DC shunt generator the type of current flows in field winding is AC whereas in armature winding…
A:
Q: Explain the working of Induction Generator with diagram
A: Induction Generator: An Induction generator also known as Asynchronous generator is a type of…
Q: The internal characteristics of DC shunt generator can be obtained from *
A: Internal characteristics of DC shunt generator obtained by the relationship between the generated…
Q: Is the parallel operation of shunt generators stable if their characteristics are not identical?…
A: Parallel operation of DC generators is required to meet the extra load demand. It is always…
Q: Can an induction motor work as a generator ? Why ?
A: An AC motor is an electrical machine that takes AC electrical input energy and produces mechanical…
Q: 5- Why should the terminal voltage drop more in the case of shunt generator than in the case of…
A: Electrical machines can be either generator or motors. They can be either Ac machines or DC…
Q: b) Why the power factor of three-phase induction motor low at no-load and increase as applied load…
A: Power Factor = Real Power/Apparent Power,or p.f. = W/VA.Then the cosine of the resulting angle…
Q: why does a series connected DC generator output voltage increase with an increase of the load…
A: In this question we are going to discuss why does a series connected DC generator output voltage…
Q: 4. What is the required excitation current to obtain the rated voltage at the output terminal of the…
A: Required excitation current to obtain the rated voltage at the output terminal of the generator.
Q: Discuss power equation of synchronous motor
A: A synchronous motor coverts electrical power to mechanical power but always runs at synchronous…
Q: b) In a dc shunt generator, as the load increases the terminal voltage fall Illustrate the reason ;…
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Q: What are the reasons for the drop in terminal voltage of self excited shunt generator When loaded?
A: With increases in the load, the terminal voltages of all dc shunt generators decrease.
Q: : in DC generator how can get the output voltage more than no-load voltage? which type of connection…
A: A DC machine is classified in two types. DC motors DC generators Above question is based on DC…
Q: explain the working of induction generator with diagrams
A: If rotor of induction machine is driven at a speed greater than synchronous speed then rotor…
Q: Explain the working principle of the asynchronous generator. please write the answer with…
A: Asynchronous Generator: A single induction machine can be used as an induction…
Q: 3- What are the reasons of fall of terminal voltage of a d.c. shunt generator?
A: DC shunt generator: It is a direct current generator in which the field winding is connected in…
Q: Draw the Terminal Characteristics of the following Generators. (i)Shunt DC Generator (ii)Series DC…
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Q: a) Explain the main components of AC generator? b) What conditions are necessary for paralleling two…
A:
Q: 4- Is there a great difference between long and short shunt compound generator, show that?
A: Compound Generator: The generator which have both shunt fields and series fields is called the…
Q: . Type of compound DC Generator wherein the shunt field winding is connected across the armature and…
A:
Q: why is the speed in separately-excited generator decrease by the increasing load?
A:
Q: Why the power factor of three-phase induction motor low at no-load and increase as applied load…
A: Power factor is define the cosine of power factor angle. So Why the power factor of three-phase…
Q: 2. For which reasons its not possible to develop rated voltage of d.c shunt generator, both in…
A: It is not possible to develop a rated voltage in dc shunt generator because of the commutation.…
Q: How can we keep terminal voltage at constant level even when the load is gradually increases in…
A:
Q: 0.07 ohm, respectively. In order to make the generator flat-compound, so that it will have a no-load…
A: Given 10kW 250V compound generator No load voltage 230V Shunt field has 800 turns per pole And…
Q: a) Explain the main components of AC generator? b) What conditions are necessary for paralleling two…
A: Introduction: Generator is the machine that converts mechanical energy in to electrical energy.…
Q: b) Why the power factor of three-phase induction motor low at no-load and increase applied load…
A: In this question , we will write the reason of low power factor of induction motor at no load..
Q: Questions:- 1. What is the basic different between the internal characteristics and the external…
A: As per our policy I have to do the first one only. Internal Characteristics The internal…
Q: 4. Why is the fall in the terminal voltage for the external characteristic greater in shunt…
A: The electrical machines can be motor or generator. The generators convert the mechanical energy into…
Q: What is the effect of variation of speed on build up in generator shunt
A: In a DC generator, the relation between generated voltage or build-up voltage and speed is given by,…
Q: For DC shunt generator, external characteristics is the relationship between Answer:
A: For DC shunt generator, external characteristic is the relationship between
Q: The following characteristic curve represents: VT Select one: O a. The terminal characteristic of…
A: The given characteristics curve is,
Q: ii) Analyse the superiority of the V/f method of speed control for three phase Induction Motor With…
A: The induction machine for the variable speed applications, especially the cage rotor type, is mostly…
Q: Demonstrate over compound flat compound and under compound DC generator with the help of circuit…
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Q: QI: What is the relation between the speed of compound generator and shunt field current? Write your…
A: (a) At no load The figure below shows a graph of variation of field current (If) with the no-load…
Q: 1. What is the difference between circle diagram method and equivalent circuit method in calculating…
A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…
Q: What are the necessary conditions for voltage build-up in d.c shunt generator?
A: there are some necessary conditions that must be satisfied for the dc shunt generator otherwise the…
Q: True Fa The purpose of diverting resistance in series dc generator to control the effect of field…
A: The explanation of asked question is as follows.
Q: What are the components of generator?
A: we want to know What are the components of a generator?
Q: Draw the block diagram of a DC Generator?
A:
Q: How does loading of the Generator affect the Generator’s Terminal Voltage (VT) and Load Current (IL)
A: In this question we discuss how the load effects the terminal voltage.
Q: Why should the terminal voltage drop more in the case of shunt generator than in the case of…
A:
Q: : For which reasons its not possible to develop rated voltage of d.c shunt generator, both in…
A: In the dc-shunt generator, the rated output dc voltage can never develop neither in loaded condition…
Q: Problem 4.9: A 60-Hz synchronous generator rated 30 MVA at 0.90 power factor has the no-load…
A:
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Solved in 2 steps
- Q4) a)discuss the equivalent circuit and slip in a single-phase motor. b)discuss the core - losses (Rc).In alternator armature winding why we prefer : a- short pitch winding w.r.t. full pitch winding? b- distributed winding w.r.t. concentrated winding? c- double layer winding w.r.t. single layer winding?Q3/ A/ Compare between de series and shunt generator. Q3/ B/ Briefly explain the commutating process in dc machine.
- Discussion:- 1. What do you understand by "armature- reaction"? Discuss the effect of armature reaction in an alternator when it is loaded with resistive, inductive and capacitive loads. 2. Give the value of voltage regulation for different power factors at full load current and interpret their values.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 aboveTwo shunt generators A and B operates in parallel and their load characteristicsmay be taken us straight lines. The voltage of the generator A falls from 240 V atno-load to 220 V at 200 A while that of B falls from 245 V at no load to 220 V at150 A. Determine the current which each machine supplies to a common load of300 A and the bus-bar voltage at this load.
- Two DC generators, each with armature resistance of 0.02 ohm and fieldresistance of 50 ohms run in parallel and supply a total current of 1000 amperesto the load circuit. If their emfs are 270 V and 265 V, their bus bar voltagewill be. [Ans. 267.5 V]1) P.f of inductive load is corrected by connecting . . across it. .... ...... 2) Open circuit test measures . losses. 3) The output variables of a motor are and ........ ... .... 4) For a motor output power is given by ...... 5) Flux control, voltage control, and armature control are three methods for ....... of dc motor. 6) A transformer takes 100V at primary and gives 50V at secondary, its turn ratio equals 7) The given set of equations represents . . Ea – laRa = Vr , la = IL , %3D Rf 8) The given set of equations represents. la = !, + IL, VT Rf Ea – laRa = Vr , 9) The given set of equations represents . Ea – laRa – IseRse = Vr, la = Ise = l, %3D | 10). .. has more initial torque than shunt dc motor.Difference between dc series vs shunt machine... Only difference...
- Two shunt generators A and B operate in parallel and their load characteristic s 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.Practical circuit diagram of the experiment OF NO-LOAD CHARACTERISTICS OF D.C. SHUNT GENERATOR EXPERIMENT. When a self-excited compound DC generator supplies load, the terminal voltage is not the same as the generated emE Why? a) voltage drop across the armature resistance will reduce the voltage available at the load terminals b) where there is a series field, voltage drop across the series field resistance will reduce the voltage available at the load terminals c) both "a" and "b" d) neither "a" nor "b"