Starter motor with planetary gear system and three planet gears for high starting torque. Equipped with a six-pole permanent-magnet excitation field and four carbon brushes, it demonstrates key electrical components like the solenoid switch, commutator, and pull-in/hold-in windings. Highlights the compatibility of the starter motor with modern engine systems, featuring materials such as glass-fiber reinforced polyamide or sintered steel for the internal gear.