Post on 09-Apr-2018
transcript
8/8/2019 Electric Motors Workshop
1/17
FUNDAMENTALS OF ELECTRIC
MOTOR
By
K. Palani Thanaraj & Vasantha Kumar
Department of Instrumentation &Control
SRM University
8/8/2019 Electric Motors Workshop
2/17
OBJECTIVE
The objective of this project is to build a simple
electric motor from scratch.
To understand the inter relationship of electricity
and magnetism.
8/8/2019 Electric Motors Workshop
3/17
THINGS TO KNOW ABOUT ELECTRIC
MOTORS
Important Parts necessary to understand the working
of an electric motor
Armature or Rotor
Brushes
Commutator
Field Magnet
8/8/2019 Electric Motors Workshop
4/17
SIMPLE MOTOR SCHEMATIC
N SL R
i
Rotation
Commutator
Brushes
Battery
FieldMagnet
Coil
8/8/2019 Electric Motors Workshop
5/17
I
F
B
OPERATING PRINCIPLE
When a current carrying conductor
is placed in a magnetic field it experiences
a force which tries to rotate the conductor
on its axis
8/8/2019 Electric Motors Workshop
6/17
8/8/2019 Electric Motors Workshop
7/17
WHAT YOU WILL NEED :
A battery Holder
A battery
A magnet
Some magnet wire
Enamel Coated 22 Gauge thick wire
Length of 100 cms
Some heavier wire
Bare wire of 18 to 20 Gauge wire
Length of 30 cms
8/8/2019 Electric Motors Workshop
8/17
STEP 1
FORMATION OF ARMATURE
Take the wire and wind it on a ball point pen or a small AAA
battery to make it in round form.
Leave couple of inches of wire free at the end.
Wind 25 to 30 turns of wire around the cylindrical support.
Now carefully pull the coil off the support.
8/8/2019 Electric Motors Workshop
9/17
FORMATION OF ARMATURE COIL
8/8/2019 Electric Motors Workshop
10/17
Wrap the free ends of the wire around the coil a couple of times.
The binding turns must be exactly opposite to each other.
The two ends of the coil must be in a straight line so they form a
good axle.
STEP 2
FORMATION OF AXLE
8/8/2019 Electric Motors Workshop
11/17
FORMATION OF AXLE
8/8/2019 Electric Motors Workshop
12/17
Take the copper wire and make it straight.
Remove the top half of the insulation from the wire.
Do the same thing to the other set of copper wire.
STEP 3
FORMATION OF SUPPORTING PILLARS
8/8/2019 Electric Motors Workshop
13/17
Make small loops of the wire ends so that it is able
to support the armature.
Do the same to another wire, so you have two
supports.
Attach one end of the support wires to the batteryholder and the other end to hold the armature.
STEP 4
FORMATION OF SUPPORTING PILLARS
8/8/2019 Electric Motors Workshop
14/17
FORMATION OF PILLARS
8/8/2019 Electric Motors Workshop
15/17
8/8/2019 Electric Motors Workshop
16/17
FINISHED MOTOR
8/8/2019 Electric Motors Workshop
17/17
THANK YOU