Internal circuitry
Six Zener diodes are used to convert the alternating voltage generated by the stator windings into direct voltage.
The stator windings form three phases and are delta-connected.
The magnetizing voltage is taken from the B+ connection instead of from separate magnetizing diodes.
The 6 rectifier diodes are bridge-connected. The diodes are pressed into a diode retainer.
Depending on the polarity, the diode retainer is either insulated from the casing or connected directly to it. The excitation winding is mounted on to the rotor, which has claw-type poles. Alternate claws act as north poles, the remaining alternate claws as south poles.
The ends of the excitation winding are connected to slip rings over which the exciting current is fed.