The starter is perhaps one the most misunderstood car components. Car owners assume they have it figured out until it fails. The concept behind how it works is simple. It rotates the engine crankshaft through a flywheel using an electric motor circuit. The system then reacts by rotating the crank and the engine cycle gets triggered to work continuously. This is not everything though. To fully understand how your Porsche starter works, you must first understand what the system is made of. That is, which part does what and so on…
Designed like a coil, the solenoid features an iron core placed right in the middle of a copper coil. It is one of the most easily recognizable parts of Porsche starters. It resembles a tubular part on the main motor. It is designed to push the pinion drive gear and in the process, provide voltage to the main motor. It is made of a pull in coil and a hold in coil. The pull in coil pushes the plunger to activate the drive pinion gear while the hold in coil withstands movement of the pull in coil. It also channels battery current to the main motor.
The Coil Field
It is a series of magnetic coils designed to generate magnetism around a coil rotor. The coil field is not a permanent magnet on its own. It only generates magnetism with current input from terminal. This process is referred to as electromagnetic induction. The coil field is also made up of other parts such as the yoke, which is the housing that covers the coil.
The Coil Rotor
The coil rotor, otherwise referred to as Armature coil is yet another magnetic field generator inside Porsche starters. Its rotation is caused by interaction of two different magnetic fields in the starter. One magnetic field is produced by the coil field while the other is produced by the armature coil when voltage is applied to brushes that come in contact with the commutator. A magnetic field gets established when current passes through the armature winding. This field is always out of line with the field established by the field coil. This easily causes a force of repulsion to one pole and attraction from another. In the process, the field coil gets fixed in place and causes the armature to move. The commutator, attached to the shaft, moves by exactly the same degree and in the process, switches the pole. The armature tries to chase the magnetic field and is therefore forced to spin.
It is a rotator electrical switch in a starter motor. It is designed to periodically reverse current direction between the external circuit and the rotor. It is made of a cylinder which features multiple contact segments on the armature.
Brushes are the housings on the endplate of your car starter. They conduct current between the moving parts and stationary wires in the starter’s rotation shaft. They are made of carbon alloy and copper. They are usually four though some models have only two.