Brushless motors need an electri-
cal supply to the coils as well, but
the coils are mounted to the
inside of the motor can instead of
the shaft. This allows a direct wire
connection. The magnets are
mounted to the center shaft,
calledcalled a rotor, and no brushes are
needed. Brushless motors run
more efficiently than brushed
motors because there’s no friction
and loss of current from brushes
rubbing against a commutator.
This means more power and
longerlonger run times. Although brush-
less motors are efficient, they still
create heat and over heating any
electric motor can cause failure.
Motor Can
Rotor
End Bell
Brushed motors use magnets mounted to the
inside walls of the motor can. The center shaft,
called an armature, contains wire coils used to
create positive and negative charges. In order for
these coils to work, they must have power sup-
plied to them. Brushed motors use brushes to
transfer power to the center shaft through the
commutator,commutator, located toward the top of the shaft. A
typical motor uses two brushes as seen to the
right. These brushes must keep constant contact
to the commutator in order to charge the coils and
keep the motor running. As you can imagine, lots
of heat and friction are created between the
brushes and commutator. Keeping this part of the
motormotor clean is important to having a good running
motor. Motor cleaning sprays are sold at hobby
stores and come in easy to use spray cans. Spray
the end of the motor that contains the brushes
with motor spray every couple of runs to keep it
working properly. Thin bearing oil can be used to
lubricate the bearings or bushings after cleaning.
Commutator
Motor Can
Armature
Brush
Brush
End Bell
There are two types of electric motors used in RC vehicles, brushed and brushless. Redcat offers vehicles
with brushed motors as well as vehicles with brushless motors. In this section we will compare the two.
ELECTRIC MOTORS
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