Search Results - yifan+dong

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Single Gate Driver System for DC Circuit Breakers

THE CHALLENGE Single power semiconductor devices cannot meet the voltage demands for the solid-state switch in medium voltage DC circuit breakers (DCCBs) due to limitations in their voltage blocking capabilities. As a result, commercially available devices are often connected in series to meet the final clamping voltage target. Voltage balancing across...

Published: 9/29/2021 | Inventor(s): Jian Liu, Lakshmi Ravi, Dong Dong, Rolando Burgos, Steve Schmalz

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Category(s): Electrical

Polysaccharide - Bile Salt Conjugates

Novel amphiphilic polymers based on natural, renewable polysaccharides that can stabilize solid and liquid phase dispersions of otherwise poorly water soluble bioactive or other small molecules.

Published: 7/18/2016 | Inventor(s): Kevin Edgar, Yifan Dong

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Category(s): Drug Delivery

Cellulose Ethers for Solubility Enhancement

The technology is a novel method for making functional materials from sustainable, renewable polysaccharides. It focuses on making materials that have good solubility, dispersability, or otherwise have high affinity in and for water. These materials can be designed to contain virtually any functional group, thereby permitting the designer to equip them...

Published: 9/21/2015 | Inventor(s): Kevin Edgar, Yifan Dong, Jacob Troutman

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Category(s): Materials

Islanding Detection Using Phase-Locked-Loop Small-Signal Instability For Three-Phase Power Inverters

A simple and effective anti-islanding detection is required to meet IEEE standard 1547 for every distributed generation unit. Many research papers and patents work on this issue, and there exists lots of solutions. All the existing solutions suffer the complicated design and lots of implementation procesess. Some of them tend to destabilize the grid...

Published: 9/20/2012 | Inventor(s): Dong Dong, Dushan Boroyevich, Paolo Mattavelli, Bo Wen

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Category(s): Electrical

Two-Stage Bi-Directional Single-Phase Converter with DC-Link Capacitor Reduction

It is well-known that single-phase ac-dc conversion requires a bulky dc-link capacitor for filtering the ripple power from the grid, thus leading a overall bulky converter size. Also, in order to interface a dc renewable energy system to a single-phase utility grid, bi-directional power flow control and dc-bus voltage regulation are major concerns....

Published: 9/20/2012 | Inventor(s): Dong Dong, Dushan Boroyevich, Ruxi Wang, Fred Wang

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Category(s): Electrical

Anti-Islanding Detection Algorithm and Modeling Approach for Three-Phase Distributed Generation Unit

Published: 9/14/2012 | Inventor(s): Dong Dong, Dushan Boroyevich, Paolo Mattavelli

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Category(s): Electrical

DC Leakage Current Reduction for Single-Phase Full-Bridge Converter

The switching-frequency dc leakage current issue exists in the single-phase full-bridge topology with the unipolar modulation switching scheme. It is important to reduce the leakage current, which has a negative impact on the solar panels. With the emerging market on solar inverter, there are lots of patents filed by different companies on solving this...

Published: 9/14/2012 | Inventor(s): Dong Dong, Fang Luo, Dushan Boroyevich, Paolo Mattavelli

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Category(s): Electrical