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AssigneeVirginia Tech Intellectual Properties, Inc.
InventorsDong Dong, Dushan Boroyevich, Ruxi Wang, Fred Wang
Estimating the term…
DC link capacitance in a bi-directional AC/DC power converter using a full-bridge or H-bridge switching circuit can be greatly reduced and the power density of the power converter correspondingly increased by inclusion of a bi-directional synchronous rectifier (SR) DC/DC converter as a second stage of the power converter and controlling the second stage with a control loop having a transfer function common to both buck and boost modes of operation of the bi-directional SR DC/DC converter and a resonant transfer function to increase gain at the ripple voltage frequency (twice the AC line frequency) to control the duty cycle of the switches of the bi-directional SR DC/DC stage and controlling the duty cycle of the switches of the full-bridge or H-bridge switching circuit using a control loop including a notch filter at the ripple voltage frequency.
A single-phase bi-directional AC/DC power converter having a DC side and an AC side, comprising
The power converter as recited in claim 12 wherein said control circuit for balancing power is modeled as a transfer function from control duty cycle to output AC current and a transfer function from DC link voltage to output AC current.
A method of reducing DC link capacitance of a bi-directional AC/DC power converter having an AC side and a DC side, said method comprising steps of
Dependencies are inferred from the claim text.