Patent ID: 7683587

Claim:
A generation device comprising: a magneto generator including a rotor having a magnetic field and a stator having an n-phase (n is an integer equal to or larger than one) armature winding; an n-phase voltage type inverter including n-phase bridge-connected switch elements and feedback diodes connected in anti-parallel with the switch elements, and having an AC terminal connected to an output terminal of said armature winding and DC terminals between which voltage accumulation means and a load are connected in parallel; and a controller that controls said inverter so as to apply an n-phase AC control voltage having the same output voltage and frequency as said magneto generator and having a predetermined phase angle in relation to a preset reference phase from said voltage accumulation means to said armature winding through said inverter to perform control to maintain a voltage across said voltage accumulation means at a limit value or less, wherein said generation device further comprises a current detector that detects a phase current of said magneto generator, and said controller comprises: fixed point detection means for detecting a fixed point on a waveform of said phase current; phase current phase detection means for detecting a phase angle of the fixed point on the waveform of the phase current detected by said fixed point detection means in relation to said reference phase; control voltage generation timing arithmetical operation means for arithmetically operating timing for generating said AC control voltage with reference to the phase of the fixed point on the waveform of the phase current detected by said phase current phase detection means; and inverter control means for controlling the switch elements of said inverter so as to generate said AC control voltage at the timing arithmetically operated by said control voltage generation timing arithmetical operation means.