What is the reason of the "pendulum" in a synchronous motor and how can it be corrected?

Q: Question No. 25 A three-phase, three-stack, variable reluctance step motor has 20 poles on each…

A: here we have to find the step angle of the step motor .

Q: When we use this type of single phase induction motors

A: When we use this type of single phase induction motors?

Q: What is the use of a centrifugal switch in motors

A: Centrifugal switch: A centrifugal switch is an electronic switch that works by utilizing the…

Q: A 4-pole, 50-Hz, three-phase asynchronous motor is operating at a shaft speed of 1750 rpm. What is…

A: Given data:Required information:

Q: What are the similarities between an open-type split-phase motor and a capacitor-start motor? Select…

A: Open-type split phase motor has a centrifugal switch that operates when the motor reaches 75% of the…

Q: Explain in details why does the rotor of the three phase induction motor rotate, then determine the…

A: Need to find why rotor of induction motor rotate

Q: A 4-pole, 50-Hz, three-phase asynchronous motor is operating at a shaft speed of 1750 rpm. What is…

A: The given data is shown below:

Q: Capacitor-run motor has better power factor while running but it has low starting torque, why?

A: A capacitor run motor has two capacitor, out of which C1 (run-capacitor having 2 to 2.5 micro farad)…

Q: What are the three basic types of three-phase motors?

A: There are three basic types of three-phase motors, which are categorized based on the way they are…

Q: Explain why synchronous motor doesn’t have any self-starting torque. Demonstrate some measures to…

A: Synchronous motor doesn't have self starting torque because: Due to the inertia of the rotor, it is…

Q: s the following correct? True or false? If the rotor of the asynchronous motor is reversed in the…

A: A 3-ϕ asynchronous motor's rotational direction can be reversed by switching any two of the three…

Q: Explain in details why does the rotor of the three phase induction motor rotate, then determine the…

A: three-phase induction rates at a slightly slower speed than the asynchronous speed of the…

Q: The synchronous motor has zero starting torque and must be run up to operating speed by an external…

A: Types of Machine DC machine AC Machine Synchronous Machine Induction Machine PMSM Machine BLDC…

Q: Question No. 27 A 230 V, 50 Hz, 4-pole, single-phase induction motor is rotating in the clockwise…

A: Given- A single-phase induction motor rotating in the forward direction, Frequency, f = 50 Hz Number…

Q: How can i Estimate the maximum torque of the motor three phase

A: We can estimate the maximum torque by the solving the slip at maximum torque whose approximate value…

Q: Question No. 25 A three-phase, three-stack, variable reluctance step motor has 20 poles on each…

A: Given- A three-phase, variable reluctance step motor has, Number of stack, m = 3 Number of rotor…

Q: Q: The cumulative compound dc motor can give a high starting torque .why?

A: A cumulative compounds motor is that which when the shunt field flux made by the shunt winding aids…

Q: Why must a synchronous motor never be started when DC excitation is applied to the rotator

A: The motor will not turn and the induced voltage on the rotor can damage to power supply for the DC…

Q: Why is it that the induction motor operate less than the synchronous speed?

A: The synchronous speed of an Induction motor can be explained as the speed of rotating magnetic field…

Q: What will be the effect of increasing the mechanical load on a synchronous motor? Assume the field…

A: A synchronous motor is a synchronous machine that converts electrical power to mechanical power at a…

Q: the speed of a DC servo-disc motor can be varied by adjusting the aplied voltage's amount of off-or…

A: Yes. The given statement is true. The speed of dc servo motor varies with magnitude of the…

Q: A 115 V, 70 Hz, 4 pole 1- phase induction motor rotating in clockwise direction with 1710 rpm. What…

A: Given: Voltage (V)=115 VFrequency f=70 HzPoles P=4Rotor speed Nr=1710 rpm

Q: Why there is need of starter in the 3-phase induction motor?

A: At the Starting of 3-phase induction motor, If we apply rated voltage to Stator, very high current…

Q: In a synchronous motor, a decrease in the torque angle a results in: O A. No change in the induced…

A:

Q: A 3-phase, 50 Hz, 8-pole asynchronous motor rotates at a speed of 720 rpm. What is the frequency of…

A: Given, A 3-phase asynchronous motor f=50 HzP=8Nr=720 rpm

Q: QUESTION 13 A 220-v, three-phase, two-pole, 50 Hz induction motor is running at a slip of 5% (-0.05…

A: Given data, Synchronous speed Ns=3000 rpm. Slip S=5 %=0.05.

Q: A 3600 rpm, 60 Hz, 13.8 kV synchronous generator has a synchronous reactance of 20 02. The generator…

A: Given: Speed = 3600 RPMFreq = 50HzTerminal Voltage (V) =13.8 KVSynchronous Reactance (Xs) =…

Q: 5. How Can You Reverse The Direction Of Rotation Of A D.c Motor?

A:

Q: Explain the different methods of breaking DC Motors

A:

Q: Induction motor speed control technique with bad torque response to sudden changes is O V-F control…

A: Induction motor speed control technique with bad torque response to sudden changes is...

Q: How is the stator rotating magnetic field created in the three-phase induction motor? Explain.

A:

Q: Briefly explain stator frequency speed control method of induction motor

A: The speed control of an induction motor is done by varying synchronous speed. The synchronous speed…

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.