The armature is mounted on bearings and is free to rotate. It is mounted in the magnetic field produced by permanent magnets or current passing through coils of wire, which are called the field coils.
When a current passes through the armature coil, forces act on the coil
and result in rotation.
What causes the shaft of a DC motor to rotate?
The rotation of the DC motor is accomplished by the
force which is developed on a current-carrying conductor in a magnetic field
. The current-carrying conductor is connected to the shaft which is able to rotate relative to the stationary body of the DC motor.
What causes a motor to rotate?
Electric motors use magnets to convert electricity into motion. … The
attractive and repulsive forces of the permanent magnets around it
make the electromagnet spin. This circular motion is then used to power anything from a fan to an electric car.
Why does armature coil turn?
The rotation of the armature is
caused by the interaction of two magnetic fields
. One magnetic field is produced by the field winding (in some machines, like wiper motors, the field winding is substituted with a permanent magnet).
How does a DC generator rotate?
A direct-current (DC) generator is a rotating machine that supplies an electrical output with unidirectional voltage and current. … Voltage is induced in coils by
the rate of change of the magnetic field through the coils
as the machine rotates.
Can you reverse the rotation of electric motor?
Motor rotation is essentially created by the manipulation of wires and magnetic fields. Thus, you can often reverse AC
motors by switching the wire connections
. This is as easy as unhooking and re-crimping the designated wires.
How do you change the rotation of a DC motor?
Of course, the direction of current is controlled by the polarity of the voltage. So in order to change the direction of rotation, we can
simply reverse the voltage
, causing the current to flow in the opposite direction, changing the force by 180 degrees and the motor to be driven ‘backwards'.
What is the rotating part of a DC motor?
A conventional brushed DC Motor consist basically of two parts, the stationary body of the motor called the Stator and the inner part which rotates producing the movement called
the Rotor or “Armature”
for DC machines.
What are the parts of DC motor?
- Stator. A stator is one of the DC motor parts that is, as the name suggests, a static unit containing the field windings. …
- Rotor. …
- Yoke. …
- Poles. …
- Field Windings. …
- Armature Windings. …
- DC Motor Commutator. …
- Brushes.
What is the function of armature coil?
Armature: It is a rectangular iron core wrapped by the copper coil through which
electricity passes and due to magnetic field it experiences a force and rotates
. Brushes: It conducts current between stationary wires and moving parts, most commonly in a rotating shaft.
What is the fan that turns the coil of wire inside a generator called?
Energy flows through
a stator
to or from the rotating component of the system. In an electric motor, the stator provides a magnetic field that drives the rotating armature; in a generator, the stator converts the rotating magnetic field to electric current.
What is difference between turn and coil?
Turn: A turn consists of two conductors connected to one end by an end connector. Coil: A coil is formed by connecting
several turns
in the series. Winding: A winding is formed by connecting several coils in series.
Are 12 volt batteries AC or DC?
There are
both DC (direct current as from 12 volt batteries)
and AC (alternating current like what you use in your house) systems and issues on many boats, although some boats, particularly smaller ones, only use DC.
What is the most common source of DC?
What are common DC applications? This form of power is most commonly produced by sources such as
solar cells, batteries, and thermocouples
. DC power is widely used in low voltage applications such as charging batteries, automotive applications, aircraft applications and other low voltage, low current applications.
What is the speed of DC motor?
DC controls adjust speed by varying the voltage sent to the motor (this differs from AC motor controls which adjust the line frequency to the motor). Typical no load or synchronous speeds for an AC fractional horsepower motor are 1800 or 3600 rpm, and
1000-5000 rpm for DC fractional hp motors
.
