Alternators - S.E.V. MOTOROLA: Description

SEV Motorola alternators are conventional three-phrase, self-rectifying type alternators. Six silicon diodes (three positive and three negative) are used to rectify AC current. The 35 ampere alternator uses one isolation diode mounted in a heat sink attached to end frame. The 55 ampere unit incorporates two isolation diodes (connected in parallel) which are mounted on exterior. Isolation diodes (when used) have two functions: They prevent battery from discharging through regulator and alternator field, and they provide a simple means of operating charge warning lamp.