Interleaved parallel inverters with integrated filter inductor and interphase transformer

Abstract

A power electronics system, comprising a first inverter configured to receive DC power from a power source and a second inverter configured to receive DC power from the power source is provided. The system includes a first output inductor connected in series to an output of the first inverter, a second output inductor connected in series to an output of the second inverter, a coupling inductor configured to receive current from the first output inductor and the second output inductor, and an AC power output.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of U.S. patent application Ser. No. 16 / 461,245, titled INTERLEAVED PARALLEL INVERTERS WITH INTEGRATED FILTER INDUCTOR AND INTERPHASE TRANSFORMER, which is a U.S. National Phase Application under 35 U.S.C. § 371 of International Application No. PCT / US2017 / 061727 titled INTERLEAVED PARALLEL INVERTERS WITH INTEGRATED FILTER INDUCTOR AND INTERPHASE TRANSFORMER filed Nov. 15, 2017, which claims the benefit of an earlier filing date under 35 U.S.C. § 119(e) and claims the benefit of priority under PCT Article 8, as applicable, of U.S. Provisional Patent Application No. 62 / 422,838 titled COMPACT AC FILTER MODULE FOR INTERLEAVED POWER CONVERTER filed on Nov. 16, 2016, all of which are hereby incorporated by reference in their entireties for all purposes.BACKGROUNDField of Invention[0002]Embodiments of the present invention relate generally to utility scale power inverters.Discussion of Related Art[0003]A power i...

AI Technical Summary

Benefits of technology

[0010]Particularly for large scale inverter systems, AC filters required to smooth out the unacceptably rough AC power waveform of the inverters would conventionally be large and costly in order to handle the level of power and power quality required. In accordance with principles of the present invention, some embodiments provide for two or more inverters to be connected in parallel, in an extremely compact configuration, with efficient use of magnetic inductor material (thereby reducing cost). These embodiments may drastically reduce the overall AC filter size and cost, and can provide a filtered AC output quality suitable for the grid.

Problems solved by technology

Also, the higher frequency noise reduces the size of the inverter AC output filters that are needed.

Particularly for large scale inverter systems, AC filters required to smooth out the unacceptably rough AC power waveform of the inverters would conventionally be large and costly in order to handle the level of power and power quality required.

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