Patent ID: 6570779
Filing Date: 2003-05-27
Classification: H02M,H02P

Abstract:
An inverter generation apparatus comprising a DC power circuit to obtain a DC voltage from an output of a generator as a power source, a bridge type inverter to which said DC voltage is input from said DC power circuit, a filter to remove a harmonic component of an output of said inverter, load connection terminals to which said output of said filter is input and a controller to control an on-off operation of each of predetermined switch elements of said inverter in a predetermined duty ratio to switch timings appealing for predetermined PWM period so as to obtain an AC output voltage of desired waveform across said load connection terminals, said controller comprising duty correction means to correct said duty ratio of said on-off operation of said element switches on-off driven to each of said switch timings for maintaining a predetermined waveform of said AC output voltage obtained across said load connection terminals even though said output voltage of said DC power circuit varies.