Inverter for producing a true sine wave
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United States of America Patent
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Issued Date -
Oct 16, 2003
app pub date -
Aug 8, 2002
filing date -
Apr 10, 2002
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A power inverter includes a transformer having a primary winding with a first and second ends and a tap between the first and second ends for receiving a DC voltage input, and a secondary winding for outputting an output waveform. A comparator compares the output waveform to a reference signal and outputs a correction signal based on the comparison. A controller receives the correction signal and provide a switching signal. The duty cycle of the switching signal is adjusted based on the correction signal. First and second switches are coupled to the first and second ends, respectively, of the primary winding. The first and second switches switch the transformer in accordance with the switching signal so that the output waveform tracks the reference signal.
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