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Dr. Kimball’s research interests include power conversion architectures and control methods for microgrids, renewable energy, energy storage, and electric vehicles. He is the principal investigator for a major DOE-funded project, “Enabling Extreme Fast Charging of Electric Vehicles with Energy Storage.” The project’s primary goal is to develop charge station technology that can recharge an EV in under 10 minutes, similar to the time required to fill up a gasoline vehicle.
Other recent and active projects include:
AC-AC Dual Active Bridge: This innovative topology enables direct ac to ac power conversion with isolation but without a dc link. This eliminates a cost and reliability weakness of conventional grid-tied power converters.
Extended Generalized Average Modeling: This modeling technique enables the analysis of converters with multiple interacting frequency components, e.g., switching frequency and grid frequency. EGAM is essential for properly modeling an ac-ac DAB, as well as other grid-tied converters with weak decoupling between stages.
Piezoelectric Drivers: Dr. Kimball is assisting Dr. Dan Stutts, who is developing piezoelectric actuators to remove dust from solar cells. The power converter must accommodate multiple electromechanical resonance modes, which shift due to temperature and aging.