XC70 AWD L6-3.2L VIN 98 B6324S (2009)
When the starter motor rotates, the sun wheel rotates clockwise. The planetary gears, which are constantly engaged with the sun wheel and ring wheel,
rotate counter-clockwise. As the ring wheel is secured, the planetary gears are forced to circle around the sun wheel clockwise. The planetary gears rotate
more slowly than the sun wheel. It is the clockwise rotation of the planetary gears which drives the pinion. The speed reduction that occurs between the
sun gear and the planetary gear, results in greater torque. This means that a smaller and lighter starter motor can be used.
Starting the engine
When the moving steel cores for the solenoids reach their limit position the moving switches break the circuit with the fixes switches and the pull-in
winding is disconnected. The hold-in winding keeps the switches closed. The current now passes through the positive carbon brushes and the armature
winding. Grounding is carried out through the negative carbon brushes. This current creates a magnetic field in the rotor, which starts the rotor rotating.
Note! Starter motor for V8 engine is equipped with field winding instead of permanent magnets. The field windings are electrically connected in
series by carbon brushes.
When the rotor rotates, the magnetic field is generated continuously depending on how the commutator and the windings are organized on the rotor. This
