What is the synchronous speed of a motor that has four poles and is operating on 60 Hz?

Q: determine the frequency of rotor current?

A:

Q: Application of Synchronous motor ?

A: Some application of Synchronous machine: Power factor improvement Voltage regulation Constant-speed…

Q: In DC shunt motor when speed increases, the back emf will zero remains same decrease increase

A: From the emf equation of DC machine, ε=PϕZN60A Where, ε is emf, P is number of poles, ϕ is flux per…

Q: 6-1. What is the difference bet ween a synchronous motor and a synchronous generator? 6-2. What is…

A: Electrical machines can be either generator or motors. They can be either Ac machines or DC…

Q: Q/ How does the synchronous motor work? Why can't the synchronous motor start on its own?

A: This is a good question based on simple electrical machine. And the chapter is basic circuit of…

Q: A 3-phase, 60Hz, 4-pole induction motor has a rotor leakage reactance of 0.8Ω per phase and a rotor…

A: The solution is given below

Q: Why should the D.C series motor not be operated at no load and light load?

A: For a dc series motor , armature winding is in series with field winding ,which means armature…

Q: w can the direction of rotation of a DC unt motor be reversed?

A: DC shunt motor provides constant speed regardless of load.

Q: Is it possible for load of a wye connected induction motor during the blocked rotor test to be…

A: In the blocked rotor test, a low voltage is applied which circulates a full load armature current…

Q: How is the direction of rotation changed of a split phase

A: Split phase motor consists of two windings 1. Main winding 2. Starting winding

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: Why induction motor cannot run on synchronous speed? Explain using slip.

A: In an engine, simultaneous speed is the speed at which the attractive field pivots. Contingent upon…

Q: Name three characteristics that make the synchronous motor different from an induction motor?

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Q: Synchronous motor when the load is taken completely while working at full load in all properties…

A: Synchronous motor is constant speed motor always rotates at synchronous speed Ns =120fP

Q: lue increase as the torque value increases?

A: An asynchronous motor is also known as an induction motor. A three-phase balanced supply is provided…

Q: What determines when a synchronour motor is at normal excitation?

A:

Q: 3. A 6-pole, 3-phase, 50 Hz induction motor has a rotor resistance of 0-02 2/phase and sta reactànce…

A:

Q: In Synchronous Motor Operation How the regulating characteristics can be obtained from V curve?

A: The V curve is the graph between the stator current and the field current for different loads on the…

Q: Is true that the DC supply is applied to the rotor windings of a synchronous motor?

A: The movement of the synchronous motor depends on the interaction of stator magnetic field with rotor…

Q: 6. What Will Happen If The Direction Of Current At The Terminals Of A D.c Motor Is Reversed?

A:

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

A: A synchronous motor never be start when DC excitation is applied to the router because

Q: How do you reverse the direction of rotation of a d.c. shunt motor?

A: The DC shunt motor has four terminals as stated below. a) two terminals of armature winding (A1 and…

Q: What is synchronous speed?

A: This Question is from Electrical Machine.

Q: Can an induction motor operate at the synchronous speed?Why?

A:

Q: is the following correct? True or false? In order to change the rotation direction of the…

A: In order to change the rotation direction of the asynchronous motor, it can be reversed by any two…

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: 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: What is difference is synchronous and a synchronous motor?

A: There are many differences between synchronous motor and asynchronous motor. 1. In synchronous motor…

Q: A 4-pole, 60 Hz, 3-phase induction motor has a blocked rotor reactance of 0.4 ohm per phase and the…

A:

Q: What are the causes of faulty starting of a synchronous motor ? A synchronous motor starts as usual…

A: The causes of faulty starting of a synchronous motor: Voltage may be too low, at least half voltage…

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

A: The term "pendulum" in a synchronous motor defines "Hunting". Hunting is such a phenomenon of…

Q: Why the dc shunt motor running at the infinity speed?

A: In this question , we will write about how dc shunt motor running at infinite speed..

Q: .    What is the effect of the field excitation to the back emf of the synchronous motor?

A: Synchronous motor- It is an electric motor which is operated at AC supply. As the name suggest, its…

Q: What is the relationship between asynchronous motor speed (n), load (Pa)?

A: In the induction motor  relationship between asynchronous motor speed (n) and load  power Pa

Q: motor slip

A: Asynchronous Motor (Induction motor) Induction motor speed varies with the change in load. And the…

Q: A 3 phase 4 pole 400 volt 50 Hz induction motor is operating with slip 0.03. What is value of speed…

A: Given: A 3-phase 400 V induction motor having P=4f=50 Hzs=0.03

Q: What happens to rotor speed and current when mechanical load on an induction motor increases?

A: If load on an induction motor is increases then the current also increases accordingly the reason…

Q: What is the reason why a synchronous motor can be found running at no load?

A: we need to explain synchronous motor.

Q: Induction motor speed control technique which is not recommended to be used at low speed is O V-I…

A: V-F control

Q: What determines the rotation of a shaded-pole motor

A: A shaded pole motor is a type of single phase induction motor. It is an AC motor.

Q: Explain, using phasor diagrams, what happens to a synchronous motor as its field current is varied.

A: