Range Rover L322 User Manual download pdf (Page 59)

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DESCRIPTION AND OPERATION

4.34 RANGE ROVER

Charging

The battery (C1641) provides a permanent feed to the alternator (C0183) via the starter

motor (C0178) on an R wire. Fuse 5 of the passenger compartment fuse box (C0587)

provides an ignition feed to the alternator (C0053) on a GW wire.

When the engine is cranked, the alternator (C0053) supplies the ECM (C0606) a Pulse

Width Modulated (PWM) signal on a U wire. The ECM uses this PWM signal to calculate the

electrical load on the alternator, and controls engine idle speed accordingly.

When the engine is started, the magnetised rotor within the stator windings generate 3

phase alternating current (ac) and voltage that rises rapidly with rotor speed. The field

diodes in the rectifier pack convert the ac current into direct current (dc). Output current from

the field diodes supplements the initial current flowing through the field windings. This

causes an increase in the magnetic influence of the rotor, resulting in self-exitation of the

alternator. The field current increases with rotor speed and thus increases the generated

current and voltage until the alternator is fully excited. The alternator (C0178) charges the

battery (C1641) by providing current on an R wire.

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Comments to this Manuals

Lee 18 Apr 2024 | 04:50:09

Range Rover L322 User Manual Page 59

Comments to this Manuals