Patent ID: 8058739

Claim:
A main circuit of an electric power generating apparatus for dispersed power supply comprising a permanent magnet type electric power generator driven by a windmill or waterwheel driven at varying speeds by wind or water, and having two windings, each of said two windings inducing different effective values of induced voltages, alternating current outputs of said permanent magnet type electric power generator being rectified by individual rectifiers, and direct current outputs of said individual rectifiers being summed up in parallel to output to an external, wherein a reactor is connected in series between a first individual rectifier and an alternating current output terminal of a first one of said two windings, said first winding inducing a lower effective value of induced voltage among said two windings, and a capacitor is connected in series between a second individual rectifier and an alternating current output terminal of a second one two windings, said second winding inducing a higher effective value of induced voltage among said two windings, in a manner that a sum of inductive impedance by internal inductance of the second winding and capacitive impedance by said capacitor is capacitive impedance having its absolute value being decreased at an increase of number of rotations of the windmill or waterwheel, within a range of rated rotational speed of said permanent magnet type electric power generator.