What is the working principle of a starter?

[FinleyMarie]

The working principle of a starter is that when the ignition switch is closed, it energizes two coil windings. Due to the smaller resistance of the pull-in coil, a larger current passes through it. This coil is connected in series with the motor circuit. Under the effect of the current, the motor rotates slowly to facilitate the engagement of the pinion gear with the flywheel. The starter converts the electrical energy from the battery into mechanical energy, driving the engine flywheel to rotate and enabling the engine to start. Before the engine can operate under its own power, it must rely on external force to rotate. The process by which the engine transitions from a stationary state to self-sustained operation with the help of external force is called engine starting.