The starting system is composed of the ignition switch controlled by the key and the starter motor which is connected directly to the battery.For some time now, in addition to motors with series or series/parallel windings, motors have been developed with ceramic manget ferrite type permanent magnet energizing.
specifications
Circular magnet with magnetically preorientated crystals
The rough components are directed into the desired shape by pressing and extrusion. Lastly, after a thorough baking procedure, the material turns into the magnets that have a black ceramic structure. The magnetizing treatment takes place during the manufacturing process.The magnets have a circular sector and thereby replace the polar part and the winding.
1 - Radial orientation2 - Parallel orientation
Stator-inductor
The positioning of the magnets cannot be done through strong compression or by means of riveting because the magnets are reasonably fragile: they are secured by flexible means, clips which, in some cases, are stuck to the casing. The casing assembly can be compared with a simple mechanical component without wires to be fitted using two special bolts; it has 6 magnetic poles.
1 - Permanent N-S magnets
Rotor-armature (with epicyclical reduction unit)
The rotor-armature is illustrated in the diagram below.
1 - Shaft2 - Ring gear/crown wheel3 - Satellite/planet gears4 - Pinion/sun gear5 - Armature6 - Commutator/switchGiven that the magnetic field is produced by permanent magnets, the energizing is the same in all motor operating conditions; in addition, as there are no energizing windings, there is no energizing current or ohmic resistance: the total resistance only depends on the armature circuit. The rotation speed is only influenced by the current that passes through the blades and reaches the rotor depending on the voltage. Since the motor is equipped with permanent magnets, i.e. with fixed polarity, the direction of rotation depends on how the current is sent to the blades.When rotating the rotor transmits motion to the three satellite gears fitted on special supports that transmit their drive torque to the ring gear or crown wheel in one piece with the output shaft where the pinion is located and the engine flywheel is rotated. The optimum reduction radio 1:4.26 is 4.26 revs of the rotor for every revolution of the ring gear and the presence of permanent magnets makes it possible to produce small simply designed motors with a comparable power output in relation to motors with windings.
1 - Pinion with free wheel2 - Epicyclic reduction unit3 - Inductor permanent magnets4 - Polar casing assembly5 - Armature or rotor6 - Blades7 - Manifold8 - Commutator side support9 - Engagement relay10 - Lever11 - Control side support
Technical data
The types of starter motor adopted on this vehicle are summarized in the table.
