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Alternator & Regulator - BOSCH: Description

NOTE: Some models may use a Motorola alternator. Please refer to ALTERNATOR & REGULATOR - SEV MOTOROLA article.

Bosch alternators are conventional 3-phase, self-rectifying type alternators. Bosch 65 through 75-amp alternators use 3 positive and 3 negative diodes connected to stator windings to rectify current. Bosch 90-amp alternators use 14 diodes.

All alternators use 3 exciter diodes connected to stator windings. These diodes turn off the alternator indicator light and supply power to the voltage regulator while the engine is running. Bosch regulators are transistorized and integral with alternator.

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