INVERTER FOR SOLAR CELL ARRAY
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United States of America Patent
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Issued Date -
Dec 8, 2011
app pub date -
Jun 2, 2011
filing date -
Jun 7, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A full-bridge, NPC inverter uses pulse width modulation (PWM) to convert the DC voltage from a solar panel array to an AC voltage at the output of the inverter that is acceptable for connection to a utility. The PWM control unit has a predetermined carrier frequency. The carrier unit uses for each carrier period either positive or negative values of a reference voltage to generate a predetermined number of signals to control the switching on and off of each of the eight inverter switching elements in a predetermined pattern for a predetermined period of the carrier frequency period to thereby produce the acceptable alternating current voltage at the inverter output and not produce between the inverter input and earth ground a carrier frequency component.
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