APPARATUS FOR CONVERTING DIRECT CURRENT TO ALTERNATING CURRENT

摘要

An inverter for converting an input direct current (DC) waveform from a DC source to an output alternating current (AC) waveform for delivery to an AC grid includes an input converter, an output converter, and an active filter, each of which is electrically coupled to a bus. The bus may be a DC bus or an AC bus. The input converter is configured to convert the input DC waveform to a DC or AC bus waveform. The output converter is configured to convert the bus waveform to the output AC waveform at a grid frequency. The active filter is configured to reduce a double-frequency ripple power of the bus waveform by supplying power to and absorbing power from the power bus.

主权项

1. An inverter for converting an input direct current (DC) waveform from a DC source to an output alternating current (AC) waveform for delivery to an AC grid, the inverter comprising:
a first converter having an input to receive the input DC waveform and configured to convert the input DC waveform to a first AC waveform at an output; a second converter comprising a bi-directional bridge circuit that includes a plurality of metal-oxide-semiconductor field effect transistors (MOSFETs), wherein at least one pair of the plurality of MOSFETs includes a first MOSFET electrically coupled in series with a second MOSFET and having a source terminal electrically coupled to a source terminal of the second MOSFET; and a transformer comprising a first winding electrically coupled to the output of the first converter to receive the first AC waveform and another winding electrically coupled to the bi-directional bridge circuit of the second converter, wherein the transformer is configured to convert the first AC waveform to a second AC waveform.