Fred C. Lee
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View article: Foreword
Foreword Open
On the behalf of organizing committees of 2023 IEEE International Power Electronics and Application Conference and Symposium (IEEE PEAS 2023), we would like to welcome all colleagues around world to participate in the conference which will…
View article: Base drive circuit for a four-terminal power Darlington
Base drive circuit for a four-terminal power Darlington Open
A high power switching circuit which utilizes a four-terminal Darlington transistor block to improve switching speed, particularly in rapid turn-off. Two independent reverse drive currents are utilized during turn off in order to expel the…
View article: 3kW Power Supply Design with Easy Manufacturability for 48 V Bus Power Architecture
3kW Power Supply Design with Easy Manufacturability for 48 V Bus Power Architecture Open
The increase of power requirements per server rack, especially in the 48V bus architecture is demanding the increase of rated power and power density per power supply to fit as many power supplies in the server rack power shelf as possible…
View article: 3kW Power Supply Design with Easy Manufacturability for 48 V Bus Power Architecture
3kW Power Supply Design with Easy Manufacturability for 48 V Bus Power Architecture Open
The increase of power requirements per server rack, especially in the 48V bus architecture is demanding the increase of rated power and power density per power supply to fit as many power supplies in the server rack power shelf as possible…
View article: CFP for PEDG 2021
CFP for PEDG 2021 Open
PELS) and organized by the PELS Technical Committee on Sustainable Energy Systems, will provide a venue for experts to present the results of their cutting-edge research in power electronics and distributed generation (DG) systems.PEDG 202…
View article: PEDG 2021
PEDG 2021 Open
PELS) and organized by the PELS Technical Committee on Sustainable Energy Systems, will provide a venue for experts to present the results of their cutting-edge research in power electronics and distributed generation (DG) systems.PEDG 202…
View article: Transient Control and Soft Start-Up for 1-MHz LLC Converter With Wide Input Voltage Range Using Simplified Optimal Trajectory Control
Transient Control and Soft Start-Up for 1-MHz LLC Converter With Wide Input Voltage Range Using Simplified Optimal Trajectory Control Open
The 48-V bus converters are widely used in telecommunications and network power architectures. A single-stage regulated LLC bus converter can achieve high efficiency and high power density. This article addresses the control challenges of …
View article: Low-Loss Integrated Inductor and Transformer Structure and Application in Regulated LLC Converter for 48-V Bus Converter
Low-Loss Integrated Inductor and Transformer Structure and Application in Regulated LLC Converter for 48-V Bus Converter Open
In this article, an LLC converter using gallium nitride (GaN) transistors is proposed for a 48-V regulated and isolated bus converter. Compared with pulsewidth modulation (PWM)-based topologies, the soft switching capability of an LLC allo…
View article: Optimal Design of Megahertz $LLC$ Converter for 48-V Bus Converter Application
Optimal Design of Megahertz $LLC$ Converter for 48-V Bus Converter Application Open
Intermediate bus architecture employing 48-V bus converters is widely used in power supply applications. With the rapid increase of demanded power by these loads, higher efficiency and power density are driving better performance power man…
View article: Coalescence of residual histotripsy cavitation nuclei using low-gain regions of the therapy beam during electronic focal steering
Coalescence of residual histotripsy cavitation nuclei using low-gain regions of the therapy beam during electronic focal steering Open
Following collapse of a histotripsy cloud, residual microbubbles may persist for seconds, distributed throughout the focus. Their presence can attenuate and scatter subsequent pulses, hindering treatment speed and homogeneity. Previous stu…
View article: High-Frequency Transformer Design for Modular Power Conversion From Medium-Voltage AC to 400 VDC
High-Frequency Transformer Design for Modular Power Conversion From Medium-Voltage AC to 400 VDC Open
This paper presents a high-frequency modular medium-voltage AC (4160 VAC or 13.8 kVAC) to low-voltage DC (400 VDC) system that is scalable in order to be used for different scale microgrids. A 15 kW, 500 kHz DC/DC converter is demonstrated…
View article: High-Efficiency High-Density Critical Mode Rectifier/Inverter for WBG-Device-Based On-Board Charger
High-Efficiency High-Density Critical Mode Rectifier/Inverter for WBG-Device-Based On-Board Charger Open
A widebandgap-based bidirectional on-board charger (OBC) has been proposed with a variable dc-link voltage, which tracks the battery voltage fluctuation. Although this approach is deemed most efficient for the resonant dc/dc stage, it post…
View article: Application of GaN Devices for 1 kW Server Power Supply with Integrated Magnetics
Application of GaN Devices for 1 kW Server Power Supply with Integrated Magnetics Open
In today's power electronics products, quality and reliability are given.Great emphases are placed on high efficiency, high power density and low cost.With recent advances made in gallium nitride power devices (GaNs), it is expected that G…
View article: Power Supplies on a Chip (PSOC)
Power Supplies on a Chip (PSOC) Open
All electric devices are built to operate with a certain type and amount of electrical energy, but this is often not the same type or amount of electrical energy that comes out of the outlet in your wall. Power converters modify electrical…