Question

how to make DC generator ?

Answer 1

hii

• you need a soft iron core in the shape of rectangle
• two pole of the strong magnet
• a battery
• a switch
• a ring which is split into two half

• two carbon brushes or any other substance have low resistivity

first you keep the iron core between the two pole of magnet and connect the two end of core with the split ring and make it fix

secondly you arrange a circuit which has two open end now connect this two open end with the two brushes

third connect the circuit with the split ring but keep it movable as show in the figure

now closed the circuit than your motor start working

Answer 2

Answer: A DC Generator is an electrical device which converts mechanical energy into electrical energy. It mainly consists of three main parts, i.e. magnetic field system, armature and commutator and brush gear. The other parts of a DC Generator are magnetic frame and yoke, pole core and pole shoes, field or exciting coils, armature core and windings, brushes, end housings, bearings and shafts.

Explanation: Magnetic Field System of DC Generator

The Magnetic Field System is the stationary or fixed part of the machine. It produces the main magnetic flux. The magnetic field system consists of Mainframe or Yoke, Pole core and Pole shoes and Field or Exciting coils. These various parts of DC Generator are described below in detail.

Magnetic Frame and Yoke

The outer hollow cylindrical frame to which main poles and inter-poles are fixed and by means of which the machine is fixed to the foundation is known as Yoke. It is made of cast steel or rolled steel for the large machines and for the smaller size machine the yoke is generally made of cast iron.

The two main purposes of the yoke are as follows:-

It supports the pole cores and provides mechanical protection to the inner parts of the machines.

It provides a low reluctance path for the magnetic flux.

Pole Core and Pole Shoes

The Pole Core and Pole Shoes are fixed to the magnetic frame or yoke by bolts. Since the poles, project inwards they are called salient poles. Each pole core has a curved surface. Usually, the pole core and shoes are made of thin cast steel or wrought iron laminations which are riveted together under hydraulic pressure. The poles are laminated to reduce the Eddy Current loss.

HOPE THIS HELPS YOU!!!