SUBJECT = ELECTRIC MACHINE When an Induction motor starts, the rotor follows the direction of the rotating magnetic field and starts running in the same direction. Explain the statement by giving proper reason.

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 dc generator has a field flux of 0.001 Wb and 4 poles. The machine operates with at shaft speed of…

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Q: A 10-pole DC generator has a simplex lap-wound armature containing 100 coils of 10 turns each. The…

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Q: 1-R2(1/s-1) in induction motor parameter represents a. non indcutive resistance of mechanical load…

A: in an equivalent circuit of induction motor at running we have a resistance of R2s  but at stand…

Q: A 440 V d.c. Armature resistance of shunt motor is 0.25 Ω and field winding resistance is 220 Ω. A…

A: Solution: Given data; V =440 v, Armature resistance Ra=0.25 Ω, shunt resistance Rsh=220 Ω, Load…

Q: Explain working of an induction motor in your own word and in detail Please do it fast

A: The motor which works on the principle of electromagnetic induction is known as the induction motor.…

Q: A self-excited DC generator has lost its residual magnetism and therefore cannot work (cannot…

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Q: How the rotating magnetic field is produced. Explain its importance in the operation of an Induction…

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Q: Explain the types of DC generators

A: In the question, Explain the types of DC generators.

Q: the magnetic strengh of the field poles on a perment magnet DC motor cannot be varied a- true b-…

A: The speed control of the PMDC motor cannot be controlled by using flux control method as the flux…

Q: Q1) Under what condition will an induction motor work as an induction generator?

A: In this question, we will describe how induction motor will work as an induction generator..

Q: a)find the flux density in airgap. b)if the stator is excited with 50 Hz current, find the…

A: Given: A 2 pole synchronous machine in which lg=2.5mmAg=500cm2I=5AN=500μc=∞ According to question:…

Q: In your opinion, what happens to the rotor speed and current when mechanical load on an induction…

A: Given induction motor we have to calculate effect on rotor speed and current.

Q: What are the various losses in an Induction motor? On what factors do they depend?

A: the fallowing are the various losses that occur in induction motor:

Q: Explain in detail how AC motors develop a rotating magnetic field.

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Q: 2. Assume negligible inductance for the motor model shown in Figure 1. This motor is connected to a…

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Q: The rotor of an induction motor has a moment of inertia of 5kgm2. What is the torque required to…

A: Given data,  Inertia is given as, I=5 kgm2 Final speed Nf=1800 rpm Initial speed Ni=1600 rpm Time t…

Q: A self-excited DC generator has lost its residual magnetism and therefore cannot work (cannot…

A:

Q: How is a rotating magnetic field produced in a three-phase induction motor? Explain it with the help…

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Q: In dc machines, armature windings are placed on the rotor because of the necessity for…

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Q: A dc shunt generator has a critical field resistance of 400 at 1200 rpm. Now if the speed of the…

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Q: the relation between armature and field currents in a series connected DC motor is O It = If + la O…

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Q: A 220V, four pole, wave wound DC series motor has 1000 conductors on its armature. It has armature…

A: DC machines (Generator/ Motor) are the important parts of electrical drives. These machines are used…

Q: A 440V, 4-pole, lap-wound DC series motor has 510 conductors in its armature. It has a combined…

A: Given data, Number of conductors Z = 510. Number of poles P = 4. Armature resistance Ra=0.5 Ω.…

Q: Harmonics generated in a machine related to the distribution of windings is B**... Answer.

A: Harmonics generated in machine are a distortion of the normal electrical current waveform, generally…

Q: Discuss the saturation of a permanent magnet generator

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Q: What should be the number of revolutions of a dc machine to be able to have a generated em of 200V?…

A: In this question We need to determine the speed of the DC shunt motor.  We know E= PΦZN/(60A)

Q: (7) The only parts suffers from eddy currents in AC motors: a- The stator. b- The rotor. c- The…

A: 7. Answer: The stator and rotor   Explanation: The rotating magnetic field and induced voltage cause…

Q: Q.36 Name three factors that determine the torque produced by an induction motor. Select one or…

A: Those  three factors are following in which torque depends upon:- i) the magnitude of rotor current.…

Q: Draw the Salient Pole Rotor and Non-Salient Pole Rotor b. Give specific difference of the two…

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Q: 3. The operation of a 3-phase induction motor is based upon the application of: (a) Faraday's law…

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Q: What is the difference between torque of (1- 0) induction motor & torque of (3- 0) induction motor…

A: Given that  What is the difference between torque of single phase induction motor & torque of…

Q: Why do we need to supply DC field current instead of AC in an Alternator rotor? Explain briefly your…

A: Explanation is given in step -2

Q: A) Although the magnetic field for each phase of a 3-phase induction motor is merely switching back…

A: For a 2 pole, 3 phase stator winding, the three windings are displaced from each other by 1200 along…

Q: 8. What happens to the magnitude of the magnetic field on the Rotor when an induction machine speed…

A: The solution is given below

Stator and Rotor Magnetic Field

The stator and rotor magnetic field is the resulting magnetic field generated by a system of coils that are symmetrically aligned. They are supplied with polyphase currents. The magnetic field is generated by poly-phase (two or more phases) current or single-phase current. In the latter case, two field stator windings are supplied and two resulting electromagnetic fields are generated beyond the stage.