초록 ▼

Two generation systems 3, 8 each including inverter 8 are switched over between series connection and parallel connection by switching section 5. Reference waveform signals are mutually communicated between the two generation systems through communication lines 6. When a phase difference between the

Two generation systems 3, 8 each including inverter 8 are switched over between series connection and parallel connection by switching section 5. Reference waveform signals are mutually communicated between the two generation systems through communication lines 6. When a phase difference between these two reference waveform signals is within a predetermined range, the inverters are driven to generate an output alternating current. One of the conduction angles of thyristors 3a, 3a in two converters 3, 3 which is larger than the other is inputted to a deviation detector 42. Based on a deviation of the conduction angle inputted from a target conduction angle, an updated target rotational speed is set in a calculator 44. A throttle controller 48 controls a throttle opening angle so that an actual rotational speed converges into the target rotational speed. A ground fault is judged based on a potential difference across one node point in a first arm, connected to the earth and the other node point in a second arm of a resistance bridge provided across a pair of output terminals of either one of the inverters.

대표청구항 ▼

[ What is claimed is:] [1.]1. 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 cu

[ What is claimed is:] [1.]1. 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.