What kind of short circuit test is done in synchronous alternator?

Q: Armature reaction in an alternator affects generated voltage/phase Select one: O True O False

A: In this question we will write effect of armature reaction in an alternator....

Q: Q_choose the correct answer: 4_Adjustment resistance in rotor system will.--------when three phase…

A: Adjustment resistance or external resistance is added in wound rotor 3-phase induction motor to…

Q: connected turbo-driven alternator

A: Three Phase Synchronous machine- This Synchronous machine comprises of rotor and stator as it basic…

Q: What is the type of load connected to the terminals of the synchronous generator given in the…

A:

Q: What is short circuit characteristics of (s.c.c) of an alternator Explain? Explain the effect of…

A: According to the bartleby's guideline we should solve only one question so please post another…

Q: A 10 pole, 25 Hz alternator is directly coupled to and is driven by 60 Hz synchronous motor. What is…

A: Given: For alternator Palt=10falt=25 Hz For synchronous motor fsm=60 Hz

Q: The reactance’s of the alternator  during the periods of the subtransient, transient and steady…

A: An alternator/Synchronous generator is a type of electrical machine that converts mechanical energy…

Q: What is the major difference between induction motor and synchronous motor

A:

Q: In the stator winding of a synchronous generator, the chording angle is for eliminating fifth…

A: Given, In the stator winding of a synchronous generator, the nth harmonic n = 5

Q: The most common failure item with a three-phase induction motor system is the A. rotor bars. B.…

A: Option A is correct because  Rotor is a rotating part while stator is a stationary part of of an…

Q: 2. In an induction motor, no-load the slip is generally.....

A: We are authorized to answer the first question since the exact one wasn’t specified. Please submit a…

Q: three phase induction motor is wound for 4 poles and is supplied from 50Hz system. Calculate the…

A: In this question , we will find synchronous speed and motor speed for given slip..

Q: EXPLAIN THE WORKING PRINCIPLES OF SYNCHRONOUS ALTERNATOR IN ACCORDANCE WITH: a. Mechanical and…

A:

Q: Explain the reasons for the differences between the measured and predicted voltage regulation at…

A: As per our honor policy we are bound to solve only one question at a time, since you have not…

Q: A 3-phase, star-connected alternator is rated at 15000 kVA, 11 kV. The armature resistance is I-5…

A: The solution is given below

Q: What is the effect of the capacitive load to the terminal voltage of the alternator?

A: It is known that capacitive load supplies leading reactive power in any circuit. and the apparent…

Q: Adjustment resistance in rotor system will --------when three phase load decrease. remain constant…

A: There are few questions related to the basic  connection and construction details of Synchronous…

Q: If the emf from the air gap line is the 3-phase alternator is 440V per phase and armature current is…

A: Given: The emf from the air gap line is the 3-phase alternator is E=440 V Armature current,  I=110 A

Q: Q choose the correct answer: 4_Adjustment resistance in rotor system will.-------when three phase…

A: Given  Multiple choice questions based on alternator. Please find the below attachment for clear…

Q: Why does an alternator's voltage rise when it is loaded down with a leading load!

A: A 3-phase alternator is a synchronous machine that converts mechanical power into 3-phase power…

Q: Write four disadvantages of stator voltage speed control method of 3-phase induction motor

A: Stator voltage speed control method: It is the speed control of 3-phase induction motor by…

Q: For what purpose is short circuit done in synchronous alternator?

A:

Q: When the deviation between the stator and the rotor axis in a synchronous generator is measured to…

A: Synchronous generator  The asynchronous generator is also called an alternator, it is an electrical…

Q: What is the effect of changing the sequence of 02 phas in the electric feeder (single phase,…

A: According to Bartleby guidelines we are supposed to answer only one question at a time if they are…

Q: What are factors on which induced EMF of an alternator depends?

A: INDUCED  EMF=4.44FφNKpKdF= frequencyφ=fluxN=speedKp=Pitch FctorKd=Distribution factor

Q: What is the effect of an unbalanced load on the output voltage of an alternator?

A: The explanation is as follows.

Q: Which one of the following types of alternators would most likely use damper windings to maintain…

A: According to question we have to calculate which one of the following types of alternators would…

Q: bla 5 In 2-pole machines: the wave winding have greater generated voltage than *.the lap winding…

A: DC machines induced emf  E= PZN×flux/(60A)  It's depend on no of parallel path and no of pole.  And…

Q: Draw and label both the power and control circuits of a 3-phase direct-on-line(DOL) starter on an…

A: We need to draw and label two diagrams for 3 phase DOL induction machine starter that is,  Power…

Q: The reactance’s of the alternator  during the periods of the subtransient, transient and steady…

A: According to question: Transient reactance is calculated as…

Q: Why brushless exciters are used in a synchronous generators. If two parallel alternators’ have…

A: The brushes are one of the important component of any machine. For the generators it is used to…

Q: What are the procedure in rewinding a three-phase motor?

A: The procedure of rewinding a three-phase motor is described in the following section.

Q: Why do we need to have an Exciter in a complete set-up of an Alternator system operations? Explain…

A: A device known as an exciter or a DC generator relay induces the DC machine-held excitation to…

Q: Draw a single-layer, short-pitch (5/6), distributed lap-winding for a 3-phase, 4-pole, 48 slot…

A: Alternator:- Alternator is a machine which is used to convert the mechanical energy into the…

Q: For a three phase induction motor neutral wire is not required. Select one: True False

A: To solve above problem one should understand basic concepts of three phase: In a three phase system,…

Q: The open circuit voltage is 14,000 volts of a 12,000 volts three- phase wye-connected turbo…

A: The solution is given below

Q: A 6000 volts, 2MVA turbo synchronous alternator is operating at 0.707 power factor lagging. This…

A:

Q: What do you mean by stray load loss of an alternator?

A: Stray load losses of Alternator :– These are losses caused by the load current due to changes in…

Q: When is the internal voltage of a synchronous generator equal to the outlet voltage of the generator…

A: The voltage EA is the internal generated voltage produced in one phase of a synchronous generator.

Q: Explain the characteristic of alternator running under load. (Note: I would be glad if it was…

A: alternator  it is a machine or generator which convert mechanical energy into  AC electrical energy.…

Q: Why does an alternator's voltage drop sharply when it is loaded down with a lagging load?

A: With legging load the voltage drop across reactances increases because of negative angle of current

Q: common types of electrical failures of an AC induction motor

A: Electrical failures in AC induction motor is occurred when the insulation of winding get damaged ,…

Q: (iv) Draw the circuit diagram to explain the adjustable-frequency drive for a 3-phase induction…

A: Electrical machines can be either generator, transformer or motors. They can be either Ac machines…

Q: Why the efficiency of large size alternator should be larger than that of small size?

A: In large size alternator heating losses are less because conducting material have wide contact with…

Q: synchronous generator with 5 pole pairs should have revolutions per minute to generate a sinusoidal…

A: In this question we will find synchronous speed ...

Q: How can the phase rotation of one alternator be changed in relationship to the other alternator?

A: Phase rotation: It is also called as phase sequence. It is the order in which the waveform of AC…

Q: A 10 pole 25 Hz alternator is directly coupled to and is driven by 60 Hz synchronous motor then the…

A: Given Alternator:PA=10fA=25HZSynchronous motorfM=60 HZPM=?

Q: Comparison between induction motor and synchronous motor

A: Induction motor runs at a speed lower than the synchronous speed whereas synchronous motor runs at…

Q: A 10 pole 25 Hz alternator is directly coupled to and is driven by 60 Hz synchronous motor. What is…

A: Given: For alternator, Number of pole, P1=10 Frequency, f1 = 25 Hz For motor, Number of pole, P2=?…

Q: what is the reason behind parallel operation of alternators?

A: Electric power networks are linked together for reliable, cost-effective operation. Synchronous…

Synchronous Motor

The synchronous motor is an AC electric type motor where at a steady-state the shaft rotation is synchronized with the supply current variable-frequency. To an integral number of AC cycles, the rotation period is exactly equal. The stator of the motor in the synchronous motor contains multi-phase AC electromagnets due to which a magnetic field is created that rotates in time with the oscillation of the line current. The rotor contains a permanent magnet and the rotor rotates in synchronization with the stator field at the same rate and provides the second synchronized magnetic field which is rotating in nature as a result. When the synchronous motor is supplied with independently excited multi-phase AC electromagnets on both the rotor and the stator, it is termed as a doubly-fed machine. The most widely used AC-type motors are the synchronous AC motor and the induction AC motors.