Derive an expression for the rotor copper loss in terms of slip and input to the rotor? (The answer must be printed and not handwritten)

Q: 2. If the armature of an eight-pole machine were wound with a simplex wave winding, how many…

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Q: 6. How will the load current affect the speed except its effected on Ia Ra drop?

A: A self-excited DC shunt motor, also known as a shunt wound DC motor, is a form of self-excited DC…

Q: In a 4 pole wave wound DC machine has 720 conductors, then the number of paths is?

A: In a 4 pole wave wound DC machine has 720 conductors, then the number of paths is?

Q: III. Derive an expression for the rotor copper loss in terms of slip and input to the rotor?

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Q: Discuss one (1) equipment or machine that applied magnetism concept in the operation

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Q: With example and figure explain hysteresis, dead zone?

A: 1) Hysteresis 2) Dead zone

Q: Explain the term air-gap power or power developed in the rotor and shaft power. How these terms are…

A: This topic comes under the power stages of an induction machine. When we supply 3 phase power to the…

Q: What will happen if the back emf drops to zero because the external mechanical load stops the…

A: We need to state What will happen if the back emf drops to zero because the external mechanical load…

Q: DC machine with 2 poles, wave winded (retrogressive) (two layers) with 18 slots, the values of pole…

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Q: Option 2: Salient pole rotor type & due to non uniform air gap used for low or medium speed…

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Q: What is armature and reaction, how does armature reaction affect alternator voltage according to…

A: Any electrical machine has a stator and a rotor. The place where the conductors are placed is called…

Q: What is meant by induction heating of metal raceways and how can you prevent it?

A: The induction heating of metal raceways is as follows: - Induction heating is the way toward warming…

Q: An 8 pole, 250 V, wave-wound generator has 400 conductors. If the generator is to be lap-wound, the…

A: Given a generator having, Number of poles, P = 8 Wave wound with 400 conductors.

Q: How many parallel paths are there in the windings of an armature wound duplex lap for four poles?

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Q: Compare between solid iron rotor and drag-cup rotor

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Q: A- The power flow diagram in dc motor ? B- conditions to builds voltage in dc generators ? C-…

A: A) Power flow diagram in DC motor: From diagram,  the input is given to a motor is in electrical…

Q: 2. What is the relationship between the generator's excitation Current (4) and generator's field…

A: Need to find relationship between generator excitation current and generator  field flux

Q: Explain distribution of flux and magnetic motive force in AC machines?

A: To generate the Torque for rotation in the Motor or to generate induced emf in the generator, a…

Q: Q3) A 4 pole wave wound short shunt compound DC Generator supplies c current of 100 A to a load of…

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Q: 1- Why the counter emf cancels part of the armature voltage?

A: One individual question is to be answered. 1. The counter emf cancels part of the armature voltage…

Q: What does subject AC and DC machinery is about?

A: Below find the solution AC machines are motors that convert ac electric energy to mechanical energy…

Q: Which loss in the machine significant in no load test and why ?

A: In no load test, the no load losses are significant. The no load losses are friction loss, windage…

Q: Compare the reaction of DC motor and DC generator. Aslo explain rule by which DC generator/motor…

A: rule by which DC generator/motor works Basically, all the machines work on faradays law of…

Q: used more than once. There are more words than required. Word list: armature, between, brushes,…

A: Given : armature, between, brushes, clockwise, commutator, currents, direction, distortion,…

Q: 3- Why the magnetization curve of SG is similar to the B-H curve of armature steel core?

A: The electrical machines can be either generator or motor. They are used for the energy conversion…

Q: I'm having a difficulty in understanding this Design of Armature (Stator) of AC GENERATOR.…

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

Q: Explain the term air-gap power or power developed in the rotor and shaft power. How these terms are…

A: Induction motor  Explain Air gap power ?  Power developed?  Shaft rotor power?

Q: Why the magnetic and copper losses calculated by swinburn test method are less than the actual…

A: The magnetic and copper losses calculated by the swinburn test method are less than the actual…

Q: What is the excitation current required to obtain the rated voltage at the outp of the generator?…

A: a generator produces output voltage which is proportional to the magnetic field, which is also…

Q: Derive an expression for the rotor copper loss in terms of slip and input to the rotor?

A: The solution is as follows.

Q: Total number of conductors on the armature (ii) voltage induced by the generator (in Volts)

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Q: Word list: armature, between, brushes, clockwise, commutator, currents, direction, distortion,…

A: In this question we will complete given dc machine related statements... Note :- as per our…

Q: Q choose the correct answer: 1-Brushless excitation system consisting of.... a- Stator field winding…

A: Given

Q: 1- Plot the speed-fieid current relation (Flux control ). 2-Plot the speed-armature voltage relation…

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Q: Explain No load test or rotational loss test and Blocked rotor test.

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Q: Explain the concept of electrical degrees. How is the electrical angle of the voltage in a rotor…

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A: In a transformer losses are of 4 types Core losses Copper losses Stray losses  Dielectric losses

Q: Derive an expression for the rotor copper loss in terms of slip and input to the rotor?

A: The explanation is as follows.

Q: What is the frequency of the alternating voltage generated in the armature conductors of a) 6 pole,…

A: frequency of induced emf = No. of poles×speed120. a) given no .of poles = 6 and speed = 900 rpm…

Q: Explain the methods for creating residual magnetism in generator whose field poles were…

A: Residual Magnetism- A small amount of magnetism is retained by the soft iron of electromagnet known…

Q: If the armature of an eight-pole machine were wound with a simplex wave winding, how many parallel…

A: The armature winding of electrical machines are of two types as listed below : Lap winding Wave…

Q: What is meant by armature reaction ?

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Q: How should the armature be laminated for the purpose ? (DC GENERATOR QUESTION)

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Q: Discuss the reason why the generator terminal voltage varies with the electrical load?

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Q: 25) How can eddy current loss be minimized?

A: Eddy current loss :- eddy current losses due to eddy current. Eddy current produced if any magnetic…

Q: Why are laminated poles used in modern dc machine construction?

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Q: Why Kirchhoff's voltage rule is not applicable for induced current in a close loop?

A: According to Faraday's law of electromagnetic induction, time-varying magnetic flux linked with a…

Q: Create a winding table, developed diagram, and circuit diagram for either of the given armature:…

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Q: Complete the blank Commutator in DC machine is made up of .....................................?

A: The commutator is the device used with the rotor in electrical machines to  ensure that current at…

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.