according to Tractor starter Motor wiring diagram, current flows through the stator and armature at the same time. The tractor starter generates a fixed magnetic field, which can be compared to the force of a strong permanent magnet.

All tractor starters used on tractor engines are similar in design.The only variable factors of the tractor starter are the operating voltage, current range, rated power, number of meshing teeth on the front gear and the direction of rotation of the central starter shaft, whether it is counterclockwise (CCW) or clockwise (CW).These are the basic factors that all beginners will have in principle and design.

A Tractor starter The motor is built around the rules of Flemings left, which states that the conductor (copper wire, called armature) that carries current (DC power), when placed in a magnetic field (generated by the stator), will experience a flow perpendicular to the magnetic field. Motion current (start the movement of the motor shaft)

The core of the tractor starter is the central laminated iron core, on which a conductive copper wire is wound, and a conductive ring is formed at one end of the shaft.This ring is called a commutator.

The central laminated iron core is composed of several layers of thin metal sheets, and copper wires are wound around and between the iron sheets in a predetermined manner.The entire assembly is then laminated with the shaft, metal sheet and copper wire and cured in a furnace.The lamination ensures that there is no power shortage between the three components.
The lamination and the copper wire are separated by thin paper and then kept intact through the lamination process and appropriate rope.

When a current is applied to the copper winding, a magnetic field is generated.The coil used is called the armature.
Then put the entire laminated armature shaft into the starter motor housing.Multiple sets of copper wire loops are fixed on the shell of the starting motor, called the stator.The armature rotates inside the stator through bushings and bearings.The gap between the two can be as small as one millimeter.