An induction motor load of 1500 watts with a power factor of 0.75 is combined with a 500 volt amperes of synchronous motor with a power factor of 0.65 leading. What kvar of capacitors is required to correct the overall power factor of the two groups of motors to 0.95 lagging? What percent reduction in volt amperes results?

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: A three phase induction motor rotates at speed of 1455 r.p.m. when its synchronous s 1500 rpm. Find…

A: In this question we need to find a speed of stator with respect to rotor field.

Q: At starting of an Induction motor, the frequency of the rotor induced voltage would be

A: Mutual Induction:  Whenever flux in one coil links with the second coil, an EMF is induced in the…

Q: Describe the simulation of three phase induction motor

A: Three Phase Induction Motor: A three-phase induction motor is an electro mechanical energy converter…

Q: We use stroboscope to calculate the torque of three- phase induction motor?* True False

A: Scroboscope is used to measure the speed of induction motor.

Q: A 3 Phase induction motor is wound for 4-poles and is supplied from a 60Hz supply. Calculate the…

A: Given: A three phase induction motor has, P=4f=60 Hz.

Q: A 115 V,60 Hz, 4 pole 1-phase induction motor rotating in clockwise direction with 1710 rpm. What…

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: Select the following condition on three phase induction motor which gives very low value of slip. O…

A: Choose the correct option Which condition gives low value of slip on 3 phase induction motor.

Q: -Phase 50Hz 6 pole induction motor has rotor resistance of 0.1 ohm and reactance of 0.92. ignore…

A:

Q: 17. A small single phase, 240 V induction motor is tested in parallel with 160 N resistor. The motor…

A: It is given that: V=240 VR=160 ΩIm=2 AIT=3 A

Q: A 3 phase induction motor is connected to a 50 hz supply what is the possible synchronous speed.…

A: Solution: The synchronous speed of the induction motor is given as, Ns=120fPNs=120×50P=6000PAt P=2…

Q: A 220 shunt motor has Ra= 0.05 ohm, Rsh =60 ohm and n max = 92.5% . What is the stray power loss.

A:

Q: A 3-phase, 60 Hz induction motor has 2 poles. If the slip is 2% at a certain load, determine the…

A: According to the question, it is given that Frequency of induction motor (f) = 60 Hz Number of poles…

Q: A 3-phase induction motor has 6 poles and the operating frequency is 55HZ. Actual speed of the rotor…

A:

Q: A 3-phase induction motor running with 25% slip takes 100kw from the mains. If the stator copper…

A:

Q: A three phase induction motor operating at a slip of 5 % develops 20 kw rotor output power. What is…

A: The rotor copper loss in the above given operating conditions is calculated as shown below:

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

A:

Q: If the supply voltage in a three-phase induction motor is reduced by 10%, what will be the…

A: Given, The supply voltage of a three phase induction motor is reduced by 10 %. Let, E1=EE2=0.9E

Q: which of the following is sometimes referred to as the motor secondary of a 3 phase induction motor…

A: In 3 phase induction motor supply is given to stator from stator power is induced in rotor through…

Q: A 3-phase, 60 Hz induction motor has 2 poles. If the slip is 2% at a certain load, determine  the…

A:

Q: The

A:

Q: Explain why rotator rotates in three phase induction motor

A: Induction Motor: The Induction motor is basically a rotating machine. It converts  Three phase Ac…

Q: A 6 pole, 50 Hz, 1-phase Induction Motor runs at a speed of 900 rpm. The frequency of currents in…

A: We need to find out cage current frequency for given motor

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

A:

Q: A four-pole, 50Hz induction motor has a full- load slip of 5 percent. The rotor speed of this motor…

A: Given data, Number of poles P =4 Frequency f = 50 Hz Slip s=5 % =0.05

Q: A 6 pole, 50 Hz, 1-phase Induction Motor runs at a speed of 900 rpm. The frequency of currents in…

A: Given an induction motor with, Total number of poles, P = 6 Frequency, f = 50 Hz Rotor speed, Nr =…

Q: The statement is True or False? The synchronous speed of the three-phase induction motor increases…

A: Given  The synchronous speed of the three-phase induction motor increases with increasing the supply…

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.