A brushless alternator is a type of electrical generator that produces alternating current (AC) without the need for brushes and commutators.

• Rotor: Instead of using brushes and a commutator, a brushless alternator has a rotor with permanent magnets or electromagnets. These magnets generate a rotating magnetic field when electricity is supplied to them.
• Stator: The stator consists of coils of wire arranged around the rotor. As the magnetic field of the rotor rotates, it induces an alternating current in the stator windings through electromagnetic induction.
• Rectifier: The alternating current produced in the exiter rotor windings is then converted into direct current (DC) by a rectifier assembly and fed to the main rotor. This DC is necessary for the excitation of the rotor's magnets.
• Excitation: The DC is fed to the rotor's electromagnets or permanent magnets, creating a steady magnetic field. This field interacts with the rotating magnetic field of the rotor, inducing a three-phase AC current in the stator windings.
• Output: The three-phase AC output from the stator windings is then available for use in powering electrical devices or for distribution in an electrical grid.