Event
MS Thesis Defense: Casey Beyers
Wednesday, April 21, 2021
10:00 a.m.
https://umd.zoom.us/j/2555914757
Maria Hoo
301 405 3681
mch@umd.edu
ANNOUNCEMENT: M.S. Thesis Defense
Name: Casey Beyers
Committee:
Professor Alireza Khaligh, Chair |
Professor Isaak Mayergoyz |
Professor Timothy Horiuchi |
Date/Time: Wednesday, April 21st, 2021 at 10am
Zoom Link: https://umd.zoom.us/j/2555914757
Title: A COMPARISON OF THE RESONANT AND NON-RESONANT DUAL ACTIVE BRIDGE TOPOLOGIES FOR SINGLE PHASE MICROINVERTERS
Abstract:
The effects of introducing resonance into the impedance network of the dual active bridge (DAB) converter are examined in solar DC-AC microinverter applications. By allowing the series capacitance of the DAB to decrease towards zero the impedance network of the DAB behaves like that of the series resonant DAB (SRDAB). A general comparison was facilitated by developing two figures of merit relating to converter losses namely conduction loss factor (CLF) and switching loss factor (SLF). Modeling through multiple harmonic frequency domain analysis (MH-FDA) was then leveraged to conduct design optimization of the impedance network parameters with varying resonant frequencies and compared based on CLF and SLF. It was found that the CLF in resonant designs could be reduced with near minimization of SLF compared to non-resonant designs, hence efficiency can be slightly improved. More importantly, the reduction in the capacitance value enables reduced volumetric contributions, enhancing the achievable power density.