Electric Motor Video Lecture - Class 10

electric motor in this module you will
learn about an electric motor as you
switch on an electric fan the blades of
the fan start moving this means that
electrical energy is converted to
mechanical energy this conversion of
electrical energy to mechanical energy
is performed by an electric motor an
electric motor works on the principle
that if an electric current is allowed
to flow in a conductor placed in a
magnetic field the conductor experiences
our force as you switch on an electric
fan the blades of the fan start moving
this means that electrical energy is
converted to mechanical energy this
conversion of electrical energy to
mechanical energy is performed by an
electric motor
as you switch on an electric fan the
blades of the fan start moving this
means that electrical energy is
converted to mechanical energy this
conversion of electrical energy to
mechanical energy is put as the
direction of the direct current changes
the direction of the rotation of the
armature also changes again as the key
is opened the armature stops rotating
now let us compare the construction and
working of a DC motor to that of a DC
generator a DC motor has an input
voltage supply where as a DC generator
has a load like a bulb connected to the
carbon brushes besides in the case of a
DC motor an input direct current causes
the rotation of the armature whereas in
the case of a DC generator the rotation
of the armature results in a DC voltage
across the load now let us learn about
an AC motor an AC motor consists of a
u-shaped magnet an armature
slip rings
carbon brushes a key and an AC voltage
supply as the key is closed an
alternating current starts flowing
through the armature here even though
the direction of current changes at
regular intervals the armature rotates
in one particular direction because of
the slip rings you can notice that the
action of an AC motor is basically the
reverse of that of an AC generator
besides electric fans electric motors
are used in devices such as vacuum
cleaners water palms and hair dryers in
this module you have learned an electric
motor is an electrical device that
converts electrical energy to mechanical
energy an electric motor works on the
principle that if an electric current is
allowed to flow in a conductor placed in
a magnetic field the conductor
experiences a force depending on the
input voltage supply electric motors are
of two types DC motors and AC motors a
simple DC motor consists of a u-shaped
magnet an armature split rings carbon
brushes a key and a DC voltage supply an
EC motor consists of a u-shaped magnet
an armature slip rings carbon brushes a
key and an AC voltage supply when
electric current passes through the
armature of an electric motor the
armature starts rotating the action of
an electric motor is basically the
reverse of that of a generator