Synchronous generator can operate at any speed since the number of poles and the frequency is fixed for any given machine    Select one: True False

Q: If synchronous generator operates at unity power factor, what is the resultant magnetic filed…

A:

Q: Anti-creep holes in electromechanical meters cause no motion of the rotor when voltage is present,…

A: Anti-creep holes in electromechanical meters are designed to prevent the meter's rotor (disc) from…

Q: When slip of a three phase induction machine becomes negative, it will be functioning as a motor.…

A:

Q: Mention 3 factors causing a permanent magnet generator not to generate emf

A: The objective of the question is to identify the three main factors that can cause a permanent…

Q: When the field resistance in the synchronous generator decreased, its flux and terminal voltage:…

A: Choose the correct option.  This question is based on the synchronous Generator.  When the field…

Q: Q- In a DC generator, what will be change in emf induced if flux is reduced by 20% and the speed is…

A: Given -  Flux reduced by - 20%, Speed increased by - 20%,   To find -  Change in EMF.

Q: 18. What is the standard direction of rotation of the d.c. generators ? (DC GENERATOR QUESTION)

A: Standard direction of rotation of the d.c. generators is the clockwise.

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: 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: Generators using salient pole structure rotors are called turbo-alternators. Select one: O True O…

A: The explanation is as follows.

Q: 4 Pole generator has a wave wound armature with 32 conductor per slot. The flux per pole is 40mWb…

A:

Q: Explain the effect of speed on the open circuit char at dc generator

A:

Q: ndard practice of synchronous generator construction now a days is to ndrical field ating armature…

A: These are the few questions related to the basic understanding of alternators their construction and…

Q: node voltages

A:

Q: A 4 pole dc generator with duplex wave winding has 48 slots and four elements per slot. The flux per…

A:

Q: d.c. shunt generators in parallel, ench having an armature resistance of 0.1 0, running at the same…

A:

Q: A 6 pole DC lap wound generator has 41 armature conductors with flux per pole is 23 mWb and the…

A:

Q: The simplex lap DC generator has 4 poles, 16 slots, with a constant rpm of 600 rpm and 4 conductors…

A: We are authorized to answer three subparts at a time, since you have not mentioned which part you…

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: *.For high rotating speed machines the number of poles must be Little True O False

A: we knew that speed is given by formula N=(120*f)/p.

Q: In Synchronous generator, field is called rotor. Select one: True O False

A: Synchronous generator: It is also called as alternator. It converts mechanical input power to AC…

Q: briefly demonstrate the effect of filed current change on a synchronous generator with the help of…

A: When field current or excitation on a synchronous generator changes. The reactive power comes into…

Q: The standard practice of synchronous generator construction now a days is to have Rotating field O…

A: The objective is to determine the correct form of construction for the alternator.

Q: A 6 pole DC lap wound generator has 38 armature conductors with flux per pole is 42 mWb and the…

A: Generated voltage = flux×speed× No. of conductors×No. of polesNo. of parallel paths. For Lap…

Q: A 6 pole DC lap wound generator has 32 generated is 74 V, then the speed of the r O 3.28 rps O 0.33…

A:

Q: The flux density distribution in the air-gap of a certain generator is such that it contains a…

A: It is given that: Flux per pole due to the fundamental harmonic distribution=ϕ1=9×10-3 WbFlux per…

Q: Two 36 AC generators are such that one has twice the linear dimensions of the other. The field…

A: Solution: Let For Generator 1, Length=l1 Diameter=D1 For Generator 2, Length=l2 Diameter=D2…

Q: A 4 pole generator with wave wound armature has 50 slots each having 22 conductors. The flux per…

A: Given: A generator with Poles, P=4 Wave wound, A=2 Slots, S=50 Conductors per slot is 22 Flux per…

Q: Mention factors causing a permanent magnet generator not to generate emf

A: The reasons causing a permanent magnet generator not to generate emf are as follows:

Q: The armature of a two-pole generator is rotating at 3600 r/min. The armature has a simplex lap…

A: Generated emf = ((flux× speed× no. Of armature conductors)/60)×(poles/ parallel paths).

Q: In a synchronous machine, if magnetic field of the rotor lags the stator field by a mechanical angle…

A: In this question, choose the correct option In a synchronous machine, if magnetic field of the rotor…

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.