Alternator & Regulator: Description

Bosch alternators are conventional 3-phase, self-rectifying type alternators. Nine rectifier diodes are connected to stator windings (3 to each phase lead). Diodes change alternator A.C. voltage to D.C. voltage coming out "B+" and "D+" terminals of the alternator. Bosch regulators are transistorized solid state and integral with alternator.

Fig 1: Cutaway View of Bosch Alternator

APPLICATION

Model

Volts/Amp Rating

⁽¹⁾ Part No.

318i

14/65

489 191

320i

14/65

489 718

All Others

14/65

489 030

⁽¹⁾	Bosch part numbers are preceded by 0 120 for alternators. Integral regulator models arenumbered 469 and 489.