Patent ID: 9722504
Date: 2017-08-01
CPC Classifications: H02J,H02M

Claim:
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) and an energy storage device, 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 and wherein the second converter is configured to supplement power of the second AC waveform by supplying power to and extracting power from the energy storage device.