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Types of Electrical Motors1

The document discusses different types of electrical motors. It describes DC motors, AC motors, induction motors, and synchronous motors. DC motors operate using direct current and the direction of rotation reverses if the current direction is reversed. AC motors have a stator that produces a rotating magnetic field and a rotor that produces a second magnetic field. Induction motors obtain the current needed in the rotor via electromagnetic induction from the stator's magnetic field. Synchronous motors have the rotor rotate in synchronization with the power supply frequency.

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80 views12 pages

Types of Electrical Motors1

The document discusses different types of electrical motors. It describes DC motors, AC motors, induction motors, and synchronous motors. DC motors operate using direct current and the direction of rotation reverses if the current direction is reversed. AC motors have a stator that produces a rotating magnetic field and a rotor that produces a second magnetic field. Induction motors obtain the current needed in the rotor via electromagnetic induction from the stator's magnetic field. Synchronous motors have the rotor rotate in synchronization with the power supply frequency.

Uploaded by

Anil
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PPTX, PDF, TXT or read online on Scribd
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TYPES OF

ELECTRICAL MOTORS

ANIL AHIRWAR
31-10-18
ELECTRICAL MOTORS
The motor or an electrical motor is a device that has brought about
one of the biggest advancements in the fields of engineering and
technology ever since the invention of electricity. A motor is
nothing but an electro-mechanical device that converts electrical
energy into mechanical energy.
In simple words, we can say a device that produces rotational force
is a motor.
The very basic principle of functioning of an electrical motor lies
on the fact that force is experienced in the direction perpendicular to
magnetic field and the current, when field and current are made to
interact with each other.
CLASSIFICATION OF MOTORS
DC MOTORS
This is a device that converts DC electrical energy into a
mechanical energy.

 Principle of DC Motor
This DC or direct current motor works o the principal,
when a current carrying conductor is placed in a
magnetic field, it experiences a torque and has a tendency
to move. This is known as motoring action. If the
direction of current in the wire is reversed, the direction of
rotation also reverses. When magnetic field and electric
field interact they produce a mechanical force, and based
on that the working principle of DC motor is established.
WORKING OF DC MOTOR
AC MOTOR
An AC motor is an electric motor driven by
an alternating current (AC). The AC motor commonly
consists of two basic parts, an outside stator having coils
supplied with alternating current to produce a rotating
magnetic field, and an inside rotor attached to the output
shaft producing a second rotating magnetic field. The
rotor magnetic field may be produced by permanent
magnets, reluctance saliency, or DC or AC electrical
windings.
WORKING OF AC MOTOR
INDUCTION MOTOR
 An induction motor or asynchronous motor is an AC electric motor in which
the electric current in the rotor needed to produce torque is obtained
by electromagnetic induction from the magnetic field of the stator winding. An
induction motor can therefore be made without electrical connections to the
rotor. An induction motor's rotor can be either wound type or squirrel-cage type.
SYNCHRONOUS MOTOR
A synchronous electric motor is an AC motor in which, at steady
state, the rotation of the shaft is synchronized with the frequency of the
supply current; the rotation period is exactly equal to an integral number
of AC cycles.
 Synchronous motors contain multiphase AC electromagnets on
the stator of the motor that create a magnetic field which rotates in time
with the oscillations of the line current. The rotor with permanent
magnets or electromagnets turns in step with the stator field at the same
rate and as a result, provides the second synchronized rotating magnet
field of any AC motor.
A synchronous motor is termed doubly fed if it is supplied with
independently excited multiphase AC electromagnets on both the rotor
and stator.
CONSTUCTION OF SYNCHRONOUS
MOTOR
ADVANTAGES
AC Motors
Low power demand on start
Controlled acceleration
Adjustable operational speed
Controlled starting current
Adjustable torque limit
Reduced power line disturbances

DC Motors
Easy installation
Speed control over a wide range
Quick Starting, Stopping, Reversing and Acceleration
High Starting Torque
Linear speed-torque curve
DC motors are widely used and can be used from small tools and appliances, through
to electric vehicles, lifts & hoists
THANKYOU

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