Lab of machine

Calculation for symbol. No table. No number

I want a solution only in symbols Estimated readings should be required

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  According to the chegg policy I am entitled to answer only one question if there are multiple questions but I am submitting first two questions on my behalf for the student's well-being.

  1)The output is generated in the armature in the AC generator.

  Armature

  The part of an AC generator in which the voltage is produced is known as an armature. This component primarily consists of coils of wire that are large enough to carry the full-load current of the generator.

  Working of an AC Generator

  When the armature rotates between the poles of the magnet upon an axis perpendicular to the magnetic field, the flux linkage of the armature changes continuously. Due to this, an emf is induced in the armature. This produces an electric current that flows through the galvanometer and the slip rings and brushes. The galvanometer swings between positive and negative values. This indicates that there is an alternating current flowing through the galvanometer. The direction of the induced current can be identified using Fleming’s Right Hand Rule.

  Sine wave output in AC generator:)

  

  2) In a DC generator, the output power is often steady. It does not vary in time and amplitude because the commutator balances the voltage.

  How does a DC Generator Work?

  According to Faraday’s law of electromagnetic induction, we know that when a current-carrying conductor is placed in a varying magnetic field, an emf is induced in the conductor. According to Fleming’s right-hand rule, the direction of the induced current changes whenever the direction of motion of the conductor changes. Let us consider an armature rotating clockwise and a conductor at the left moving upwards. When the armature completes a half rotation, the direction of the motion of the conductor will be reversed downward. Hence, the direction of the current in every armature will be alternating. But with a split ring commutator, connections of the armature conductors get reversed when a current reversal occurs. Therefore, we get unidirectional current at the terminals.

  E.M.F Equation of DC generator

  The emf equation of the DC generator is given by the equation:

  E_g= (PϕZN/60A)

  where

  Z is the total number of armature conductor

  P is the number of poles in a generator

  A is the number of parallel lanes within the armature

  N is the rotation of armature in r.p.m

  E is the induced e.m.f in any parallel lane within the armature

  Eg is the generated e.m.f in any one of the parallel lane

  N/60 is the number of turns per second

  Time for one turn will be dt=60/N sec.

  Output waveform of a DC generator:)

  

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