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Power converter with ripple current cancellation using skewed switching techniques

  • US 7,046,527 B2
  • Filed: 05/09/2003
  • Issued: 05/16/2006
  • Est. Priority Date: 05/09/2003
  • Status: Active Grant
First Claim
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1. An electrical, utility-grid-interactive, power processing apparatus that sinks current from a direct current power source and sources current into an electric utility grid and comprises two or more high frequency, pulse modulated, current regulating power converter sections for each distinct phase of an electric utility grid and where each said power converter section comprises an arrangement of semiconductor power switching devices and a filter inductor and where currents in the filter inductors of said power converter sections dedicated to the same phase are summed or combined and where said high frequency, pulse modulated current regulation for each said power converter section is shifted in time or phase delayed with respect to the remaining power converter section or sections, dedicated to the same phase, for the purpose of reducing the amplitude of high-frequency pulse modulation ripple current being sourced into the electrical utility grid.

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