07957160 is referenced by 6 patents and cites 60 patents.

Methods and apparatus to provide low harmonic distortion AC power for distribution by converting energy from natural or renewable sources into electrical form, and constructing a current waveform on a primary winding of a transformer by recapturing inductive energy previously stored in the transformer so as to transform the converted electrical energy into substantially sinusoidal AC voltage at a secondary winding of the transformer. For example, AC power may be supplied to a utility power grid from raw electrical energy from renewable energy sources (e.g., solar cells). An inverter may construct the primary winding current waveform using two unidirectional switches. On each half cycle, one of the switches first applies energy previously recaptured from primary winding inductance, and then applies the raw energy to the transformer primary winding at the utility power grid frequency. Accordingly, the constructed primary winding current may exhibit substantially improved total harmonic distortion.

Title
Current waveform construction to generate AC power with low harmonic distortion from localized energy sources
Application Number
12/233432
Publication Number
7957160 (B2)
Application Date
September 18, 2008
Publication Date
June 7, 2011
Inventor
Phillip N Smith
Spokane Valley
WA, US
David J Babcock
Spokane Valley
WA, US
Paul M Babcock
Spokane Valley
WA, US
Agent
Craige Thompson
Thompson Patent Law Offices PC
Assignee
Flyback Energy
WA, US
IPC
H02H 7/125
H02M 3/335
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