Patent ID: 6281664
Filing Date: 2001-08-28
Classification: H02P

Abstract:
A generator having two power source systems each of which comprises a rectifier circuit for rectifying an input alternating current into a direct current and an inverter circuit for converting the direct current inputted from the rectifier circuit into an alternating current of a predetermined frequency, one of said systems further comprising:target waveform generating means for producing a reference waveform to determine an output frequency of the inverter circuit;means for producing a reference waveform clock signal representative of the reference a waveform to the other system;means for receiving a second reference waveform clock signal transmitted from the other system;phase difference detecting means for detecting a phase difference between the first and second reference waveform clock signals; andfrequency adjusting means for adjusting the output frequency so that the phase difference detected by the phase difference detecting means is within a predetermined range;wherein the generator includes switching means for selectively connects the two power source systems in series connection or in parallel connection.