What kind of machine is a DC generator?
Basic construction and working of a DC Generator. A dc generator is an electrical machine which converts mechanical energy into direct current electricity. This energy conversion is based on the principle of production of dynamically induced emf.
What is the working principle of a DC generator?
Working principle of a DC generator: According to Faraday’s laws of electromagnetic induction, whenever a conductor is placed in a varying magnetic field (OR a conductor is moved in a magnetic field), an emf (electromotive force) gets induced in the conductor.
How is the commutator in a DC generator made?
Commutator in DC Generator. The commutator, which rotates with the armature, is cylindrical in shape and is made from a number of wedge-shaped hard drawn copper bars or segments insulated from each other and from the shaft. The segments form a ring around the shaft of the armature.
How is an EMF generated in a DC generator?
A DC generator is an electrical machine whose main function is to convert mechanical energy into electricity. When conductor slashes magnetic flux, an emf will be generated based on the electromagnetic induction principle of Faraday’s Laws. This electromotive force can cause a flow of current when the conductor circuit is closed.
Which is the heart of a DC generator?
For holding the armature windings, the armature core slots are primarily used. They are connected in a closed-circuit winding form in series to increase the amount of produced current; and they are parallel. This special arrangement of conductors is called the armature winding that is known to be the heart of a DC generator.
Where is the commutator in a DC generator?
A commutator works like a rectifier that changes AC voltage to DC voltage within the armature winding. It is designed with a copper segment, and each copper segment is protected from each other with the help of mica sheets. It is located on the shaft of the machine.
What is the emf of a DC generator?
Induced emf in DC generator Eg = emf of one conductor × number of conductors connected in series. Induced emf in DC generator is, e= (ØP N/60) X (Z/A)