1. What are the different kinds of IC (Integrated Circuit) and their functions?

Self-evaluation:

  1. What is the difference between Armature and Rotor?

It is located inside the stator and its objective is to rotate so that in turn the motor shaft or generator rotates. So basically, the rotor consists of a field magnet which rotates while the rotor remains stationary and on the other hand the armature carries current and is stationery and part of the stator.

  1. What provides by the stator?

the stator provides a magnetic field that drives the rotating armature; in a generator, the stator converts the rotating magnetic field to electric current. In fluid powered devices, the stator guides the flow of fluid to or from the rotating part of the system.

  1. In order to produce a voltage, what are the basic parts to generate a DC Generator?

In a DC generator, field coils produce an electromagnetic field and the armature conductors are rotated into the field. Thus, an electromagnetically induced emf is generated in the armature conductors. The direction of induced current is given by Fleming's right-hand rule.

  1. Summarize the Operations of a DC Generator.

A DC generator operates on the principle of Faraday's laws of electromagnetic induction. According to Faraday's law, whenever a conductor is placed in a fluctuating magnetic field (or when a conductor is moved in a magnetic field) an EMF is induced in the conductor.

  1. What is the purpose why DC Generator has a Commutator?

The commutator on the DC generator converts the AC into pulsating DC. The commutator assures that the current from the generator always flows in one direction. The brushes ride on the commutator and make good electrical connections between the generator and the load.

POST TEST

  1. One means of supplying a stable output is by using what type of DC Generator

The Compound Generator

  1. The residual magnetism in a generator produces lines of force from a north pole to a south pole. If the current field coils is in the wrong direction, the lines of force will be produced opposite to the residual lines, and a cancellation of flux will result which will prevent the generator from building up. How to fix this problem?

To fix this trouble, reverse the shunt field connections or reverse the direction of rotation of the generator.

  1. Where must a current flow to produce a magnetic field

A current must flow through the electromagnet conductors to produce a magnetic field.

  1. Explain the difference between Self-excited generator and a separate excitation.

In a separately excited (S.E.) machine, the field winding is connected to a separate voltage source while, in a self-excited generator field winding is connected across the armature terminals (provides its exciting current).