Generator unit having function of automatically adapting itself

Details Generator unit having function of automatically adapting itself Generator unit having function of automatically adapting itself

1992-01-21

1993-11-02

Peckman, Kristine L.

Electricity: single generator systems

Automatic control of generator or driving means

Plural conditions

322 28, H02P 930

Patent

active

052587002

ABSTRACT:
A portable generator capable of automatically adapting itself to parallel operation of a plurality of generators including the present generator. A voltage detector and a current detector generate a voltage signal and a current signal respectively indicative of detected voltage and current of an AC output from the portable generator. A phase difference detector generates a signal indicative of a phase difference between the detected voltage and current. An oscillator has its output frequency controlled by the signal indicative of the phase difference. A target output waveform signal in the form of a sine wave signal is formed, which has a frequency corresponding to the output frequency of the oscillator. The target output waveform signal and the voltage signal are mixed at a variable ratio. At the start of the generator, the voltage signal takes precedence over the target output waveform signal to thereby cause an invertor circuit to effect switching control based on the voltage signal. After the start of the generator, a target output waveform to be realized through the switching control by the invertor circuit is gradually shifted from a waveform of the voltage signal to a waveform of the target output waveform signal.

REFERENCES:
patent: 3758843 (1973-09-01), Ishizaki et al.
patent: 3794846 (1974-02-01), Schlicher et al.
patent: 4129818 (1978-12-01), Goto et al.
patent: 4463306 (1984-07-01), de Mello et al.
patent: 4714869 (1987-12-01), Onitsuka

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