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BRUSH MOTOR: positive and negative wires connect to power. There are two curved permanent magnets inside the case and a spinning shaft with wires wrapped around, it that goes down to the center of the motor. The shaft and the wires together are the armature of the motor and at one end is where the motor pinion gear is attached . At the other end there is the commutator. Touching the commutator to transfer electrical power to the armature are two brushes. The wires that come from the speedo (see diagram) bring power to the brushes which physically contact the commutator, turning the armature into a basic electromagnet field when electricity is applied.

Most used Motors for Quadcopter

BRUSH MOTOR, Two (2) curved permanent magnets inside the case and a spinning shaft with wires wrapped around (armature), motor pinion, commutator, two (2) brushes, speedo, electromagnet field
BRUSHLESS MOTOR, much more efficient, there is no physical connection between parts, longer-lasting because there is no friction of the brushes and commutator, increases efficiency, no sparking, electrical interference reduced, cooler, boosting efficiency

BRUSHLESS MOTOR are so much more efficient than brushed motors.  When the rotor spins on, there is no physical connection at all, making the brushless motor more efficient and longer-lasting because there is no friction of the brushes and commutator. The speedo controls the rotation of the rotor also increases efficiency. There is no sparking from brushes to commutator so electrical interference is drastically reduced. Motor will stay  cooler, boosting efficiency.

BRUSHLESS OUTRUNNER motor, rotor outside as part of a rotating outer case, stator is located inside the rotor, much higher torque than the conventional brushless motors, outrunners are able to drive larger and more efficient propellers
BRUSHLESS OUTRUNNER motor, rotor outside as part of a rotating outer case, stator is located inside the rotor, much higher torque than the conventional brushless motors, outrunners are able to drive larger and more efficient propellers
Brush Motor, Brushless Motor, Brushless Outrunner Motor

BRUSHLESS OUTRUNNER: It’s a recent type of brushless motor. These motors have the rotor outside as part  of a rotating outer case while the stator is located inside the rotor. This arrangement gives much higher torque than the conventional brushless motors, which means that outrunners are able to drive larger and more efficient propellers without the need of gearboxes.

Best Motor Brands (Links)

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