Parallel inverter system
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United States of America Patent
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May 18, 1993
Grant Date -
N/A
app pub date -
Dec 18, 1991
filing date -
Dec 19, 1990
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A parallel inverter system has a plurality of AC output inverters of an instantaneous voltage control type, a bus for connecting outputs of the inverters to a load so as to share the load current, a detection circuit for detecting a cross current component in a current flowing among the inverters, and an instantaneous voltage control circuit for controlling the output voltages of the inverters. In response to a signal in accordance with the detected cross current component from the detection circuit, the voltage control circuit inserts a virtual impedance between the inverters so as to suppress cross current.
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