ENGINE AR 1167958 - Caterpillar

If another time instant is chosen (150° phase angle) where none of the voltages are zero, the current would flow as shown in illustration 5 Phase Relationships (150°).Equal currents flow from windings "U" and "V" to the respective positive diodes. They return to the neutral point through "W" winding negative diode and winding "W".Note: Not all the diodes belonging to the various phases are used at the instant of time examined in this example. This remains true for all the other instants of time which could be examined. Individual phase currents change in magnitude and polarity, while the output current to the battery or electrical accessories remains uniform.Excitation Circuit
The exciting current for generation of the magnetic field is taken from the stator winding. It is rectified by three exciter diodes and the three negative power diodes. The exciting current follows the path shown in the illustration 6.
Illustration 6 g03240256
Excitation circuit with phase angle of phase U = 120°Current flows from the output of winding "U" (positive at this instant of time), through its corresponding exciter diode and the alternator D+ terminal to the regulator D+ terminal. When the regulator