BMW 5 Series E39

since 1996-2001 release

Repair and operation of the car

+ Introduction
+ Maintenance instruction
+ Current leaving and service
+ Engine
+ Cooling systems, heating
+ Power supply system and release
- Engine electric equipment
   + System of ignition
   + System of preheat of the diesel engine
   - Systems of a charge and start
      Removal and installation of the rechargeable battery
      The low-served rechargeable battery
      Check of the rechargeable battery
      Self-discharge of the rechargeable battery
      Charging of the rechargeable battery
      The generator - general information
      Security measures during the work with the generator
      Check of tension of charging of the generator
      Removal and installation of the generator
      Check and replacement of brushes of the generator and regulator of tension
      Removal and installation of a starter
      Removal, check and installation of the electromagnetic traction relay
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Schemes of electric equipment
+ System of onboard diagnostics

The generator - general information

The BMW car of the 5th series has the generator of alternating current. Depending on model of the car and its equipment generators of nominal current 80 and 140 can be installed And.

The generator is set in motion by the engine through maple a belt. The rotor and the stator of the generator have windings (at a rotor an excitement winding).

Electric current to a winding of excitement of a rotor arrives through brushes and contact rings and creates the electromagnetic field in the generator.

The electromagnetic field of a rotor at its rotation changes situation therefore in windings of the stator electric current is formed.

As the rechargeable battery is charged only with a direct current, alternating current will be transformed in constant by means of the rectifier which is on a diode payment. The regulator of tension changes charge current by inclusion and switching off of current of excitement, depending on degree of a razryazhennost of the rechargeable battery. At the same time the regulator supports to constants working voltage of 14 V, irrespective of engine speed.

1 — a pulley
2 — tension regulator
3 — the soaking-up branch pipe
4 — a bolt
5 — a bolt with a washer
6 — the air channel
7 — a collar
8 — the self-tapping screw
9 — a nut