Brushless motors use the induction of a rotating magnetic field in the stator to turn the rotor and stator at the same rate. Like DC motors, these are permanent-magnet synchronous motors, or PMSMs, that rely upon magnets built into the rotor.
Brushed DC motors Issues connecting to moving armature are avoided by using a fixed one with permanent magnets in the rotor. The lack of brushes in these motors also increases their lifespans, makes them cleaner and quieter, and reduces wear and tear. Potential problems with centrifugal forces are reduced by avoiding windings on the rotor and eliminating the need for active cooling.
Panasonic Brushless motors offer several advantages over brushed DC motors, including high torque to weight ratio, more torque per watt (increased efficiency), increased reliability, reduced noise, longer lifetime(no brush and commutator erosion), elimination of ionizing sparks from the commutator, and an overall reduction of maintenance cost.