Third-brush dynamo

A third-brush dynamo is a type of electrical generator that incorporates an additional brush, known as the "third brush," which provides a means to draw off current directly from the rotating armature. This design improves efficiency and allows for better control of the voltage output compared to traditional two-brush dynamos. In a typical two-brush dynamo, the armature winding generates alternating current (AC), which is then rectified to direct current (DC) using a commutator and brushes.