High-power compact capacitor charger

Michael G. Giesselmann, Travis T. Vollmer

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations


We are reporting on a new design for a compact high power Capacitor charger with a power output that far exceeds the peak power of previously reported designs [1]. For this purpose we are evaluating parallel modular designs with separate inverters, transformers, & rectifiers and compare them with designs with a larger module size. For larger power implementations with a single inverter, transformer, & rectifier, the main challenge is the design of the inverter using parallel connected IGBT transistors and their current sharing. We are demonstrating an implementation were we are combining 2 H-Bridge inverters in parallel to feed the primary of a 100 kVA compact step-up transformer. Each H-Bridge is using current mode control to enforce current sharing. The oscillators in the current mode control IC's for each H- Bridge are synchronized for this parallel mode of operation. This topology could be expanded to more H-Bridges. In order to reduce the high-frequency impedance and the windings losses of the step-up transformer [2,3], litz wire is used for both the primary winding and the secondary windings.

Original languageEnglish
Title of host publicationPPC2009 - 17th IEEE International Pulsed Power Conference
Number of pages4
StatePublished - 2009
Event17th IEEE International Pulsed Power Conference, PPC2009 - Washington, DC, United States
Duration: Jun 28 2009Jul 2 2009

Publication series

NamePPC2009 - 17th IEEE International Pulsed Power Conference


Conference17th IEEE International Pulsed Power Conference, PPC2009
Country/TerritoryUnited States
CityWashington, DC


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