Table of Contents
What does a self excited generator rely on to start the process of building the output power?
Self-excitation is made use of most often in DC generators. When a self-excited generator is started, the initial current in the field winding is produced by the electromotive force (emf) induced in the armature winding by the residual magnetic field of the main poles.
How does a self excited DC motor work?
In the Self Excited DC Motors, the field winding is linked to the armature winding in series, parallel, partly in series, or partly in parallel. In a series-wound DC motor, the field winding is connected in series to the armature winding and the entire armature current passes through it.
How does an excitation system work?
The excitation system creates the electromagnetic field in the rotor. The stator has the armature winding that has the electrical energy induced. The stronger the magnetic field created, the stronger the electrical power produced. The strength of the magnetic field is adjusted by controlling the current to the rotor.
How are self excited generator classified?
According to the position of the field coils,self-excited DC generators may be classified as: Series Wound Generators. Shunt Wound Generators. Compound Wound Generators.
What is self excited and separately excited generator?
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) . Hence, the field winding has a large number of turns with a thin conductor.
What is the difference between self and separately excited generator?
Self-excited generator: In a self-excited generator the field winding is excited by an external DC source like a battery etc. Separately excited generator: In a separately excited generator the field poles have some residual magnetism. When the armature is rotated a small emf is induced in it.
What is self excitation?
Definition of self-excited : excited by a current produced by the generator itself self-excited generators.