J. Stewart
Sandia National Laboratories
16 Papers
10 Citations
J. Stewart is an academic researcher from Sandia National Laboratories. The author has contributed to research in topics: Switched capacitor & High voltage. The author has an hindex of 3, co-authored 6 publications.
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Papers
Design of a 10 kV SiC MOSFET-based high-density, high-efficiency, modular medium-voltage power converter
Slavko Mocevic,Jianghui Yu,Boran Fan,Ke Ping Sun,Yue Xu,J. Stewart,Yu Rong,He Song,Vladimir Mitrovic,Ning Yan,Jun Wang,Igor Cvetkovic,Rolando Burgos,Dushan Boroyevich,Christina DiMarino,Dong Dong,Jayesh Kumar Motwani,Richard S. Zhang +17 more
TL;DR: In this article , an enhanced gate-driver, auxiliary power supply network, PCB planar dc-bus, and high-density inductor are presented, enabling the SiC-based designs in modular medium-voltage (MV) power conversion.
DC link bus design for high frequency, high temperature converters
J. Stewart,Jason C. Neely,Jarod James Delhotal,Jack Flicker +3 more
- 26 Mar 2017
TL;DR: In this article, the authors considered a typical 6-puIse inverter application common in EV and HEV power systems and provided an alternative, cost-effective solution to the design of a low-impedance DC bus.
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Design and Multiobjective Optimization of an Auxiliary Wireless Power Transfer Converter in Medium-Voltage Modular Conversion Systems
TL;DR: In this paper , a CLLC-CL circuit topology is implemented to generate a load-independent output voltage with a coupling-coefficient-independent resonant frequency, which decouples the circuit gain from the coil design.
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Improved Power Density of a 6 kV, 1 MW Power Electronics Building Block Through Insulation Coordination
TL;DR: In this article , the insulation coordination in a 6 kV, 1 MW power electronics building block (PEBB) is presented, which can be stacked in various series-parallel configurations as part of a modular multilevel converter sustaining at least 30 kV common mode.
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Design and evaluation of hybrid switched capacitor converters for high voltage, high power density applications
J. Stewart,J. Richards,Jarod James Delhotal,Jason C. Neely,Jack Flicker,Robert W. Brocato,Lee Rashkin +6 more
- 04 Mar 2018
TL;DR: This work investigates the use of hybrid switched capacitor converter (HSCC) topologies with wide bandgap devices to achieve high efficiency DC-DC power conversion with high gain, high voltage outputs to useful for several applications that include a medium voltage bus.
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