Differences Between Brushed and Brushless DC Motors airhandlingunitsuppliers.home.blog/2022/05/24/differences-between-brushed-and-brushless-dc-motors/
One of the most basic forms of DC motor is the brushed DC motor. It usually consists of a stator (a pair of permanent magnets) and a rotor (a motor coil) coupled to a commutator. Armature winding is on the rotor in this motor, while permanent magnets are always on the stator. Current-carrying conductors are always found on the rotating portion. These wires are powered by a direct current power source in practice. The electricity is transferred to the coil by metallic brushes that rotate with the rotor. Although these motors are highly efficient, they do require brush cleaning on a regular basis. Instead of using a controller to switch current in the windings, brushed motors use mechanical commutation of the windings via brushes. Brushes charge the commutator with a polarity opposite that of the stationary magnet, causing the armature to rotate. When these windings become charged, they generate a magnetic field whose attraction and repulsion keep the rotor spinning. To keep the rotor moving within the stator field, the windings are constantly energized in a varied sequence as the rotor rotates. Brushes are utilized to transfer current to the motor windings through commutator contacts in electric motors. Brushless DC motor, as their name suggests, do not use brushes. Commutation is not used in brushless DC motors to regulate current flow inside the coils. Electrical commutation is used to deliver the current, which results in an AC electric signal that drives the motor. Permanent magnets are attached to the rotor in this motor. On the stator are the currentcarrying conductors, also known as armature windings. They use electrical commutation to turn electrical energy into mechanical energy, unlike brushed motors. Current-carrying commutators are absent in brushless motors. An amplifier actuated by a commutating device, such as an optical encoder, switches the field within a brushless motor.
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