A 3-phase induction motor has 8 poles and the operating frequency is 55Hz. The synchronous speed will be

Q: A 3-phase induction motor has 4 poles and the operating frequency is 60HZ. The synchronous speed…

A: Need to find synchronous speed Ns

Q: In an induction motor, if the rotor is locked, then the rotor frequency of induction motor will be:…

A: Given: In an induction motor, the rotor is locked.

Q: In a round-rotor alternator, reactive power is maximum at a load angle of 0 electrical degrees 90…

A: at load angle of zero degree reactive power is maximum

Q: In a single phase AC capacitor start and run induction motor, to make the rotation in anti-clockwise…

A: Given a single phase AC capacitor start and run induction motor,

Q: In a round-rotor alternator, reactive power is maximum at a load angle of * O 90 electrical degrees…

A: in a round rotor alternator reactive power is defind as  Qout=EVXdCOSδ - V2Xd

Q: H.W/ State the difference between an induction motor with a wound rotor member and a squirrel cage…

A: Induction motors are operating on the basis of rotating magnetic field (RMF). Where RMF has constant…

Q: A synchronous generator generates 310 V at 50 Hz when the field current is 4.1A. The e.m.f generated…

A:

Q: The generated voltage per phase of an alternator is E0 while the speed of rotor rotation is 3000…

A: We will establish the relation between the generated voltage and the speed of the alternator.

Q: Difference in 1 phase induction motor and 3 phase induction motor

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Q: The frequency of alternating current is the number of complete cycles that occur in a minute. Select…

A: for the case of alternating current the frequency is the number of complete cycle that occur in one…

Q: The generated voltage per phase of an alternator is EO while the speed of rotor rotation is 3000…

A: We will establish a relation between generated emf and the speed with which the rotor is rotating to…

Q: is the duty cycle of step down chopper which is having 216 V as a input and 202 V RMS output…

A:

Q: نقطت * The value of inductance of the coil is dependent on

A: Inductance of the coil is given by : L=μN2Al Here, μ is magnetic permeability  N is number of turns…

Q: A 4-pole wound- rotor induction motor has a Wye

A: Induction machine- This Induction machine comprises of rotor and stator as it basic parts and it…

Q: False True When the rotor is loaded the slip is increased the power factor improves when the rotor…

A: 1) when rotor is loaded the the speed is decreased hence slip is increased. Answer: True   2) There…

Q: A four-pole synchronous motor needs to operate at a speed of 1000 rpm. Determine the frequency of…

A:

Q: The number of poles in the rotor circuit of a 3-phase induction motor is O Always two. Zero, because…

A:

Q: A synchronous generator generates 345 V at 50 Hz when the field current is 4.4A. The e.m.f generated…

A: Generator voltage E= 345 V at frequency 50Hz and field current 4.4A Find the voltage at frequency…

Q: In an induction motor, rotor runs at a speed

A: The principle of induction motor is electromagnetic induction. It is an asynchronous machine . ie.…

Q: A synchronous generator is generating 310 V at 55 Hz at a field current of 4.4A. The e.m.f generated…

A:

Q: By rotor resistance control, the slip of a 3-phase induction motor is increased from 0.02 to 0.04…

A: Given values are - Pin=Pg=3000WS1=0.02S2=0.04 Given that rotor power input is constant while slip is…

Q: The full load speed of a 60 Hz, 3-phase induction motor is 1120 r.p.m. The number of poles in the…

A: induction motor always near to synchronous speed  and synchronous speed =120*frequencyn. of poles…

Q: A synchronous generator is generating 320 V at 55 Hz at a field current of 3.6A. The e.m.f genera…

A:

Q: The maximum possible speed at which an alternator can be driven to generate 50 Hz and 4,000 V is…

A: Given; For an alternator, the required frequency f=50 Hz and voltage E=4000 V

Q: A six pole three phase induction motor runs with a synchronous speed of 1500 rpm. What is its…

A: Given, A three phase induction motor has, Number of poles, P=6. Synchronous speed, Ns=1500 rpm.

Q: synchronous generator generates 345 V at 55 Hz when the field current is 3.5A. The e.m.f generated…

A:

Q: The alternator frequency is direct function of rotational speed and number of poles. O True O False

A:

Q: Harmonics generated due to the presence of switching power electronic devices are called Answer: An…

A:

Q: speed

A: In this question , generator frequency and pole is given..We have to calculate speed of generator...

Q: If the alternator winding has a fractional pitch of 4/5, the pitch factor kp is?

A:

Q: A synchronous generator generates 345 V at 50 Hz when the field current is 4.4A. The e.m.f generated…

A: Given Data: E1 = 345 V I1 = 4.4 A f 1= 50 Hz E2 = ? f2 = 40 Hz I2 = 2.9 A

Q: A 3-phase induction motor runs at 3% slip and develops mechanical power equal to 10 kW. The air gap…

A: In this question,  We need to determine the air gap power of the induction motor?  Here slip s= 3% =…

Q: The rotor of a six-pole synchronous generator rotates at a mechanical speed of 1500 r/min. What is…

A:

Q: Question 5 A synchronous generator has 6 poles. Determine the speed of the steam turbine driving it…

A:

Q: A 3-phase induction motor runs at 3% slip and develops mechanical power equal to 10 kW. The air gap…

A:

Q: A three-phase induction motor with a double cage

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

Q: A synchronous generator is generating 300 V at 55 Hz at a field current of 3.4A. The e.m.f generated…

A: In this answer let us try to understand the relation between the emf generated in the synchronous…

Q: The short circuit characteristic of an alternator is always non- linear

A: the short circuit characteristic of the alternator is the relation between the Armature current and…

Q: A synchronous generator is generating 315 V at 60 Hz at a field current of 3.3A. The e.m.f generated…

A: The emf equation of alternator/ synchronous generator for full pitched, concentrated winding can be…

Q: An AC generator supplies an rms voltage of 180v at 60hz. Determine the peak voltage of the…

A: Given :  Brief description: In the above given question they are discussing about an AC generator.…

Q: A 3-phase induction motor runs at 3% slip and develops mechanical power equal to 10 kW. The air gap…

A: Given, A 3-phase induction motor runs at, Slip, s = 3 % = 0.03 Mechanical power, Pm=10 kW

Q: As the torque on synchronous motor increases, the motor speed O a reduces O b. remains constant Oc…

A: Synchronous motor speed = synchronous speed                                             =…

Q: 7. An AC motor has 6 poles and spins at a synchronous speed of 1200 rpm. What frequency is being…

A: Frequency of supply = (poles ×speed) /120. Given poles = 6 poles  And speed = 1200 rpm.

Q: Inductive and synchronous motors are connected to 240 V power supply. Inductive motor draws 40 A and…

A: The synchronous motor works in all aspects of power in normal arousal.The synchronous motor operates…

Q: A 3-phase induction motor has 8 poles and the operating frequency is 60HZ. The synchronous speed…

A: The Synchronous Speed  900

Q: An 8-pole alternator runs on 750 rpm and supplied power to a 6 pole induction motor which has a full…

A:

Q: Synchronous alternator of 8 poles driven at 6000 rpm will deliver power at frequency.

A:

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.