Current generating system with output winding switching device

摘要

A first and a second full-wave rectifying network are respectively connected with both ends of generating coils of a generator for respectively generating alternating current thereat. A switching device has normally closed contacts for making voltage differences among the input terminals of the second full-wave rectifying network zero, whereby the coils act as a star-connected current generating winding so long as the contacts are held closed. The switching device also has an energizing coil for actuating the normally-closed contacts to open when the rotational speed of the generator exceeds a predetermined value. When the normally-closed contacts are opened, the coils no longer act as the star-connected winding but an independently generating winding, to thereby increase the output current from the generator even when the generator operates at a relatively high rotational speed. A terminal circuit having a resistor and diodes connected with input terminals of the first full-wave rectifying network supplies base current for a switching transistor of a voltage regulator so that the voltage regulator establishes a separate field excitation at an earlier stage of the rotational speed of the generator.