Engine generator
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United States of America Patent
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Jun 12, 2018
Issued Date -
N/A
app pub date -
Apr 19, 2017
filing date -
Apr 20, 2016
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An engine generator includes a generator body connected to an engine, a converter including rectifiers that convert an output from the generator body to DC current, an inverter that converts an output from the converter to AC current, an input voltage detector that detects an input voltage from the generator body to the converter, and an AC current detector that detects an AC current output from the inverter. An abnormality in the engine generator is determined if a state that a current detected by the AC current detector is not higher than a first threshold value and a duty ratio of a voltage detected by the input voltage detector is not higher than the second threshold value continues for a first predetermined time; or if the current detected by the AC current detector is not higher than a third threshold value and the duty ratio change rate is not higher than a fourth threshold value.
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