Machine

D.C. Motor Characteristics

The performance of a d.c. motor under various conditions can be judged by the following characteristics i) Torque – Armature…

7 years ago

Shunt Generator

When the field winding is connected in parallel with the armature and the combination across the load then the generator…

7 years ago

Separately Excited Generator

When the field winding is supplied from external, separate d.c. supply i.e. excitation of field winding is separate then the…

7 years ago

Practical Commutation

The e.m.f. induced in each coil of armature is alternating in nature. If load is connected, the current flowing will…

7 years ago

Symbolic Representation Of D.C. Generator

The armature is denoted by a circle with two brushes. Mechanically it is connected to another device called prime mover.…

7 years ago

Introduction To Armature Reaction

For the operation of any d.c. machine, presence of magnetic flux is essential. Whenever current flows through a field coil,…

7 years ago

Characteristics Of D.C. Generators

The d.c. generators have following characteristics in general, 1) Magnetization characteristics 2) Load characteristics 1.1 Magnetization Characteristics This characteristics is…

7 years ago

Methods Of Excitation

The magnetic field required for the operation of a d.c. generator is produced by an electromagnet. This electromagnet carries a…

7 years ago

Compound Generator

In this type, the part of the field winding is connected in parallel with armature and part in series with…

7 years ago

Armature Winding In D.C. Machines

The armature winding used in d.c. machines are closed and double layer. Each of the coil has its upper coil…

7 years ago