A 10 pole 25 Hz alternator is directly coupled to and is driven by 60 Hz synchronous motor. What is the number of poles for the synchronous motor?

Q: 'hy does a slip occur in the three-phase induction motor? Expla

A: In a three phase induction motor, a three phase supply with a phase difference 120…

Q: The speed of d.c shunt motor is decreased if the field current is increased If field resistance of a…

A: 1.  In DC shunt machine Field current is  directly proposal to speed . if speed will decrease then…

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: Explain the need for connecting a capacitor in the auxiliary winding of a single phase induction…

A: A single phase induction motor is not self starting and therefore, it is necessary to making it self…

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

A:

Q: An 8 pole single phase induction motor is running at 690 rpm.what is the slip with respect to…

A: Given: A single phase induction motor with Number of poles, P=8 Motor speed, Nr=690 rpm

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: A permanent split single phase induction motor dose not have a squirrel cage rotor

A:

Q: Starting torque of three phase induction motor is normally full load torque O equal O lower than O…

A: From the torque slip characteristic of 3 phase induction motor

Q: The rotor reactance of the three phase induction motor is varies with of the rotor current.

A: According to the question we have to discuss the induction motor reactance.

Q: In three-phase induction motor rotor speed is zero at the time of starting the induction motor.…

A: True

Q: A 60Hz induction motor has 2 poles and runs at 3480 RPM. a. What is the synchronous speed (RPM)? b.…

A: Given, A 3-phase induction motor has, Supply frequency, f=60 Hz. Number of poles, P=2. Rotor speed,…

Q: A three phase induction motor runs on 60 Hz power line at 1070 rpm at full load. The motor has one…

A: synchronous speed of the motor can be calculated using the following relation N =120fP

Q: A three phase 50HZ induction motor has 6 poles. If the full load slip is 3 %. determine the rotor…

A: 1st we will find out synchronous speed then we will calculate rotor speed . We will also calculate…

Q: What are rotor faults in alternators

A: The rotor of an alternator is directly connected with field winding of the alternator whenever there…

Q: A 3-phase induction motor is wound for 2 poles and is supplied from 59-Hz system. When slip is 4%,…

A:

Q: 10. The difference between the synchronous speed and the actual speed of an induction machine is

A: The difference between synchronous speed and actual speed of induction machine is called:

Q: q2 a

A: Need to state the two reasons if three phase synchronous motor fails to start

Q: An 8 pole, 50 Hz single-phase induction motor is running at 690 rpm. What will be the slip wrt to…

A:

Q: In induction motor, speed ___ with increase in load. a. decreases b. constant c. as same as d.…

A: We know that the speed of induction motor is inversely proportional to the load. So as the load…

Q: If a 3-phase induction motor has synchronous speed of 900 rpm and the frequency in stator is 60Hz,…

A: If a 3-phase induction motor has synchronous speed of 900 rpm and the frequency in stator is 60Hz,…

Q: A 3-phase, 4-pole, 50Hz induction motor is running at 1455rpm. Find the slip speed and slip.

A:

Q: I need the curve between the power factor and mechanical load in synchronous motor

A: The relation between Power factor and mechanical load is given by inverted V- curve of motor. It is…

Q: The synchronous speed for 60 Hz induction motor can be equal to 3000 RPM. O True O False

A: An induction motor is a self starting motor and it doesn't run at the synchronous speed

Q: A three phase induction motor is supplied from a 50 Hz supply and runs at 1200 rev/min when the slip…

A:

Q: While starting a synchronous motor by induction motor action, field winding is. usually Connected to…

A: we have damper winding on rotor surface to avoid oscillations and to start the synchronous motor .…

Q: Synchronous speed of an induction motor is defined as O speed of an induction motor at no load speed…

A: Definition of synchronous speed speed of the revolution of the magnetic field in the stator winding…

Q: An 8-pole single phase induction motor is running at 690 rpm. What is its slip with respect to…

A: Given, A single phase induction motor has, Number of pole, P = 8 Rotor speed, Nr=690 rpm Lets assume…

Q: A three phase, 50 Hz induction motor has a full load speed of 1440 rpm. The full load slip will be

A: As per Bartleby guidelines we are allowed to solve only one question,please ask the rest again.

Q: The full load slip of a synchronous motor is 0% O 2% O 1% O 5%

A:

Q: In alternator, the diameter of salient pole rotor is.

A: Find explanation below

Q: 8-pole,3-phase induction motor has a frequency of 50Hz and that in the rotor is 1.5Hz, at what speed…

A: In this question we will find slip and rotor speed...

Q: An eight pole wound rotor induction motor operating on 60 Hz supply is driven at 1800 rpm by a prime…

A: Given, Number of poles, P = 8 Frequency, f = 60 Hz Rotor speed, Nr = 1800 rpm (opposite to Ns)

Q: Explain briefly the differences of induction motor & synchronous motor

A: differences of induction motor & synchronous motor.

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: The difference between synchronous motor and induction motor

A:

Q: In the the loaded  synchronous machine, the internal  voltage behind transient reactance during the…

A: True

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: A 3-phase induction motor is wound for 6 poles and is supplied from a 60 Hz supply. Calculate the…

A: Given a 3-phase induction motor has, Number of poles, P = 6 Supplied frequency, f = 60 Hz Rotor…

Q: A three phase motor running at 60HZ has a synchronous speed of 3600RPM and 3480 RPM at full load.…

A:

Q: A 220-volt, single-phase induction motor draws 12 amps of current when operated on a 60-Hz circuit.…

A: Given Data: Voltage = 220 V Current = 12 A

Q: 26. Is the amount of motor reactive power Q higher than the amount of motor active power P when the…

A: When a three-phase induction motor operates on no-load then the line current drawn by the motor is…

Q: The synchronous speed [in rpm] of a 8-pole, 60 Hz generator.

A: formula for synchronous speed is given by                        Ns= (120f)/p where, Ns= synchronous…

Q: At the time of starting of three phase wound rotor induction motor external rotor resistance must be…

A: External resistance is connected in the three-phase wound rotor induction motor to limit the…

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: In Synchronous Motor Operation Comment on the motor operation as a phase advancer (capacitor)

A: It may be recalled that a d.c generator can be runs as a d.c. motor. in the same manner, an…

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.