Electric Motor
                     Electric Motor
What is an 
Electric Motor?
An electric motor is an electric 
machine that converts electrical 
energy to mechanical energy. 
Source: www.iqsdirectory.com
Function
Most electric motors work via the 
interaction of the motor magnetic 
field and electrical current in a 
wound wire to produce force in the 
manner of torque supplied on the 
motor shaft. 
Source: www.iqsdirectory.com
Electrical 
Generator
An electrical generator is identical 
mechanically to an electrical motor 
but functions with a reversed flow of 
energy, converting mechanical 
power to electrical power.
Source: www.iqsdirectory.com
Driven by 
direct current
Electric motors may be driven by 
direct current (DC) supplies, like 
from rectifiers or batteries, or by 
alternating current (AC) supplies, like 
a power grid, electrical generators, 
or inverters. 
Source: www.iqsdirectory.com
Category
Electric motors can be categorized 
by concerns such as power supply 
type, application, construction, and 
type of movement output. 
Source: www.iqsdirectory.com
Standardized 
Motors
Standardized motors offer 
appropriate mechanical energy for 
industrial use. Applications include 
blowers and pumps, industrial fans, 
machine tools, power tools, 
household appliances, disk drives, 
and vehicles.
Source: www.iqsdirectory.com
Small Motors 
Small motors can be found in 
electrical watches. In certain uses, 
like in regenerative braking in 
traction motors, electric motors may 
be utilized in reverse as generators 
that recover power that may 
otherwise be lost as friction and 
heat.
Source: www.iqsdirectory.com
Construction 
of an Electric 
Motor
Two mechanical components of 
electric motors are the stator, which 
is fixed and the rotor, which moves. 
It also has two electrical 
components, magnets set and an 
armature, one of them is attached to 
the stator and the other to the rotor, 
together making a magnetic circuit.
Source: www.iqsdirectory.com
Construction 
of an Electric 
Motor Cont.
Field magnets produce a magnetic 
field that passes through the 
winding. These may be permanent 
magnets or electromagnets. The 
field magnet is generally on the 
stator and the winding on the rotor, 
but in other motor types these are 
reversed.
Source: www.iqsdirectory.com
How an 
Electric Motor 
Functions?
Electric motors function by changing 
electrical power (AC or DC) to 
mechanical power in order to 
produce motion. Force is created 
within a motor via the interaction 
between winding direct (DC) or 
alternating (AC) current and a 
magnetic field. 
Source: www.iqsdirectory.com