Scholarly Works, Center for Power Electronics Systems
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Recent Submissions
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Recent progress of Ga2O3 power technology: large-area devices, packaging and applications
(IOP Publishing, 2023-06)Benefitted from progress on the large-diameter Ga2O3 wafers and Ga2O3 processing techniques, the Ga2O3 power device technology has witnessed fast advances toward power electronics applications. Recently, reports on large-area ... -
Vertical GaN diode BV maximization through rapid TCAD simulation and ML-enabled surrogate model
(Pergamon-Elsevier Science, 2022-12)In this paper, two methodologies are used to speed up the maximization of the breakdown voltage (BV) of a vertical GaN diode that has a theoretical maximum BV of -2100 V. Firstly, we demonstrated a 5X faster accurate ... -
Global Intergrid for Sustainable Energy Abundance
(IEEE Power Electronics Society, 2022-06-04)Invited Poster for Session on Brainstorming for Game-Changing Ideas. -
Multidimensional device architectures for efficient power electronics
(Springer Nature, 2022-11-17)Power semiconductor devices are key to delivering high-efficiency energy conversion in power electronics systems, which is critical in efforts to reduce energy loss, cut carbon dioxide emissions and create more sustainable ... -
Present and Future of DC Circuit Breakers for HVDC Grids
(IEEE, 2023-11-15) -
Design of a 10 kV SiC MOSFET-based high-density, high-efficiency, modular medium-voltage power converter
(IEEE, 2022-03)Simultaneously imposed challenges of high-voltage insulation, high dv/dt, high-switching frequency, fast protection, and thermal management associated with the adoption of 10 kV SiC MOSFET, often pose nearly insurmountable ... -
Role of power electronics in Grid 3.0
(IEEE, 2022-12) -
A SiC-Based Liquid-Cooled Electric Vehicle Traction Inverter Operating at High Ambient Temperature
(China Power Supply Society, 2022-06-30)This paper describes the design process of a high-power-density 100 kW (34 kW/L) traction inverter for electric vehicles, operating at an ambient temperature of 105 °C. A detailed thermal analysis is performed based on the ... -
Superjunction Power Transistors With Interface Charges: A Case Study for GaN
(2019-12-13)Recent progress in p-GaN trench-filling epitaxy has shown promise for the demonstration of GaN superjunction (SJ) devices. However, the presence of n-type interface charges at the regrowth interfaces has been widely observed. ... -
Structural Resemblance Between Droop Controllers and Phase-Locked Loops
(IEEE, 2016)It is well known that droop control is fundamental to the operation of power systems and now the parallel operation of inverters, while phase-locked loops (PLLs) are widely adopted in modern electrical engineering. In this ... -
Two-stage multichannel LED driver with CLL resonant circuit
(United States Patent and Trademark Office, 2017-01-10)In a two-stage power converter providing voltage regulation in a first stage, zero voltage switching (ZVS) is provided in switches in an unregulated, constant frequency second stage of a two-stage power converter by an ... -
Method and apparatus for driving a power device
(United States Patent and Trademark Office, 2016-12-27)Aspects of the disclosure provide a circuit for driving a power switch. The circuit includes a first circuit configured to provide a charging current to charge a control terminal of the power switch, a second circuit ... -
Parallel devices having balanced switching current and power
(United States Patent and Trademark Office, 2018-10-30)A power circuit includes a power source for providing electrical power and two driving transistors being disposed in parallel and receiving electrical power from the power source. Each of the two driving transistors includes ... -
Transient performance improvement for constant on-time power converters
(United States Patent and Trademark Office, 2018-10-23)Response of a variable frequency switching constant on-time or adaptive on-time controlled power converter to a large step-up or step-down change in load is improved with a simple circuit that detects magnitude and polarity ... -
Low profile coupled inductor substrate with transient speed improvement
(United States Patent and Trademark Office, 2018-10-23)A low profile inductor structure suitable for use in a high power density power converter has one or more windings formed by vias through a thin, generally planar body of magnetic material forming the inductor core and ... -
Multi-step simplified optimal trajectory control (SOTC) based on only Vo and I load
(United States Patent and Trademark Office, 2018-09-11)A resonant power converter is disclosed with a driving circuit generating a switching signal connecting power to a resonant tank circuit, with a voltage monitoring circuit measuring a voltage output and a load current. A ... -
Semiconductor module arrangement
(United States Patent and Trademark Office, 2018-07-24)In a switching module structure that includes a low-impedance path to ground, such as a parasitic capacitance of an insulating substrate, a further insulating substrate presenting a parasitic capacitance placed in series ... -
Hybrid interleaving structure with adaptive phase locked loop for variable frequency controlled switching converter
(United States Patent and Trademark Office, 2018-07-03)In a multi-phase power converter using a phase-locked loop (PLL) arrangement for interleaving of pulse frequency modulated (PFM) pulses of the respective phases, improved transient response, improved stability of high ... -
Power-cell switching-cycle capacitor voltage control for modular multi-level converters
(United States Patent and Trademark Office, 2018-05-08)In a modular multi-level power converter, additional switching states are interleaved between main switching states that control output voltage or waveform. The additional switching states provide current from a DC-link ... -
Power switch drivers with equalizers for paralleled switches
(United States Patent and Trademark Office, 2018-06-12)Capacitors connected between gate terminals of a plurality of parallel-connected power transistors are charged and discharged in each switching cycle to provide a plurality of power transistor control waveforms from a ...
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