Search results for: Alex. Q. Huang

Items from 1 to 20 out of 197 results

article

SiC Trench MOSFET With Integrated Self-Assembled Three-Level Protection Schottky Barrier Diode

Xuan Li, Xing Tong, Alex Q. Huang, Hong Tao, more

IEEE Transactions on Electron Devices > 2018 > 65 > 1 > 347 - 351

A silicon carbide (SiC) trench MOSFET (TMOS) with integrated three-level protection (TLP) Schottky barrier diode (SBD), named ITS-TMOS, is proposed and investigated by simulation. The device features the integrated TLP-SBD that remarkably improves body diode characteristics while guarantees excellent fundamental performance of TMOS. In the blocking state, the P-base region, the trench gate, and the...

article

Soft-Switched Modulation Techniques for an Isolated Bidirectional DC–AC

Mengqi Wang, Qingyun Huang, Suxuan Guo, Xiaohang Yu, more

IEEE Transactions on Power Electronics > 2018 > 33 > 1 > 137 - 150

Two carrier-based unipolar-sinusoidal pulse width modulation (SPWM)-oriented modulation techniques for an isolated bidirectional dc–ac converter are proposed, compared, and validated in this paper. The dc–ac converter is composed of a full-bridge (FB) inverter cascaded with a cycloconverter through a high-frequency transformer. Both modulation techniques proposed in this paper can realize zero-voltage...

article

Active Damping of Ultrafast Mechanical Switches for Hybrid AC and DC Circuit Breakers

Chang Peng, Landon Mackey, Iqbal Husain, Alex Q. Huang, more

IEEE Transactions on Industry Applications > 2017 > 53 > 6 > 5354 - 5364

An active damping method for Thomson coil actuated ultrafast mechanical switches is proposed, including its control. Ultrafast mechanical switches are crucial for both dc and ac circuit breakers that require fast-acting current-limiting capabilities. However, fast motion means high velocity at the end of travel resulting in over-travel, bounce, fatigue, and other undesirable effects. The active damping...

article

15-kV/40-A FREEDM Supercascode: A Cost-Effective SiC High-Voltage and High-Frequency Power Switch

Xiaoqing Song, Alex Q. Huang, Soumik Sen, Liqi Zhang, more

IEEE Transactions on Industry Applications > 2017 > 53 > 6 > 5715 - 5727

High-voltage wide bandgap semiconductor devices such as the 15 kV SiC <sc>mosfet</sc> have attracted great attention because of their potential applications in high-voltage and high-frequency power converters. However, these devices are not commercially available at the moment, and their high cost due to expensive material growth and fabrication may limit their widespread adoption in the...

article

Power Semiconductor Devices for Smart Grid and Renewable Energy Systems

Alex Q. Huang

Proceedings of the IEEE > 2017 > 105 > 11 > 2019 - 2047

Modern civilization is related to the increased use of electric energy for industry production, human mobility, and comfortable living. Highly efficient and reliable power electronic systems, which convert and process electric energy from one form to the other, are critical for smart grid and renewable energy systems. The power semiconductor device, as the cornerstone technology in a power electronics...

article

A 98.3% Efficient GaN Isolated Bidirectional DC–DC Converter for DC Microgrid Energy Storage System Applications

Fei Xue, Ruiyang Yu, Alex Q. Huang

IEEE Transactions on Industrial Electronics > 2017 > 64 > 11 > 9094 - 9103

This paper presents a novel 400 to 12 V isolated bidirectional dc–dc converter based on a phase-shift-controlled-modified dual-active-bridge power stage. The proposed converter consists of a half-bridge and center tap with active clamp circuit, which has promising performance for low-voltage high-current applications. 650 V gallium-nitride high electron mobility transistors are used on the high voltage...

chapter

Continuous switching operation of 15 kV FREEDM super-cascode

Soumik Sen, Xiaoqing Song, Liqi Zhang, Alex Q. Huang

2017 IEEE Energy Conversion Congress and Exposition (ECCE) > 4366 - 4372

2017 IEEE Energy Conversion Congress and Exposition (ECCE)

High voltage and wide bandgap (WBG) semiconductor devices like the 15 kV SiC MOSFET have attracted a lot of attention because of their potential applications in high voltage and high power converters. However, they are not commercially available at present and their high cost might be a hindrance to their widespread adoption in future. To address the commercial unavailability and the high cost issues...

chapter

Data center power distribution system reliability analysis tool based on Monte Carlo next event simulation method

Yang Lei, Alex Q. Huang

2017 IEEE Energy Conversion Congress and Exposition (ECCE) > 2031 - 2035

2017 IEEE Energy Conversion Congress and Exposition (ECCE)

High reliability is extremely important for uninterruptable power supplies (UPS) such as those used in the modern data centers. It is necessary to comprehensively and precisely evaluate reliability of different UPS system's architectures before constructing the data center. In this paper, a novel reliability analysis and simulation tool for data center power distribution system is proposed. The basic...

chapter

Design and optimization of the high frequency transformer for a 800V/1.2MHz SiC LLC resonant converter

Suxuan Guo, Pengkun Liu, Liqi Zhang, Alex Q. Huang

2017 IEEE Energy Conversion Congress and Exposition (ECCE) > 5317 - 5323

2017 IEEE Energy Conversion Congress and Exposition (ECCE)

The LLC resonant converter is very suitable for high frequency and high power density applications due to its excellent characteristics such as load independent ZVS turn-on, low turn-off current. The high frequency high voltage transformer is a key component in the LLC that provides galvanic isolation and power conversion. In order to improve the power density, the frequency can be pushed to several...

chapter

Assessment of medium voltage SiC MOSFET advantages in medium voltage drive application

Hanning Tang, Alex Q. Huang

2017 IEEE Energy Conversion Congress and Exposition (ECCE) > 801 - 807

2017 IEEE Energy Conversion Congress and Exposition (ECCE)

This paper proposes a hypothetic silicon carbide (SiC) metal oxide semiconductor field effect transistor (MOSFET) power module for the medium voltage (MV) variable frequency drive (VFD). A peer-to-peer comparison between commercial silicon (Si) insulated-gate bipolar transistor (IGBT) and the proposed SiC MOSFET module results in some promising results to support the introduction of SiC power modules...

chapter

Design and implementation of a 7.2kV single stage AC-AC solid state transformer based on current source series resonant converter and 15 kV SiC MOSFET

Qianlai Zhu, Li Wang, Dong Chen, Liqi Zhang, more

2017 IEEE Energy Conversion Congress and Exposition (ECCE) > 1288 - 1295

2017 IEEE Energy Conversion Congress and Exposition (ECCE)

This paper introduces a 97% efficiency medium voltage (MV) Solid State Transformer (SST) based on two-level single stage (TLSS) topology and 15 kV SiC MOSFETs. Series resonant converter (SRC) is implemented as the main stage and is identified as a current source (CS) SRC for the first time. Equivalent resonant frequency of the proposed CS-SRC is analyzed in both time domain and frequency domain. Resonant...

chapter

Comparative study on the turn-off capability of multiple Si and SiC power devices

Liqi Zhang, Kai Tan, Xiaoqing Song, Alex Q. Huang

2017 IEEE 5th Workshop on Wide Bandgap Power Devices and Applications (WiPDA) > 295 - 299

2017 IEEE 5th Workshop on Wide Bandgap Power Devices and Applications (WiPDA)

DC power delivery system is becoming an attractive alternative in an AC dominant world due to its higher energy efficiency and better cable utilization. It has already been applied in data centers, commercial buildings, electrical vehicle charge stations and micro grid systems, etc. Among many new issues that need to be addressed for the DC power delivery system, ultra-fast and accurate protection...

chapter

An improved SiC MOSFET-gate driver integrated power module with ultra low stray inductances

Liqi Zhang, Pengkun Liu, Alex Q. Huang, Suxuan Guo, more

2017 IEEE 5th Workshop on Wide Bandgap Power Devices and Applications (WiPDA) > 342 - 345

2017 IEEE 5th Workshop on Wide Bandgap Power Devices and Applications (WiPDA)

An improved SiC MOSFET-gate driver integrated half-bridge module with folded layout using direct bonded copper (DBC) substrate is designed, fabricated, and tested. The bottom layer of the DBC is used as part of the power loop to achieve major reduction in the loop stray inductance. Due to the low parasitic inductance and capacitance, the gate resistor is chosen as zero to reduce the switching loss...

article

Wide Bandgap Devices and Power Conversion Systems—Part I

Oscar Lucia, Xu She, Alex Q. Huang

IEEE Transactions on Industrial Electronics > 2017 > 64 > 10 > 8190 - 8192

article

A SiC Power MOSFET Loss Model Suitable for High-Frequency Applications

Xuan Li, Junning Jiang, Alex Q. Huang, Suxuan Guo, more

IEEE Transactions on Industrial Electronics > 2017 > 64 > 10 > 8268 - 8276

The reduced chip size and unipolar current conduction mechanism make silicon carbide (SiC) metal–oxide–semiconductor field-effect transistors (MOSFETs) suitable for high-frequency power electronics applications. Modeling the switching process of the SiC power MOSFET with parasitic components is important for achieving higher efficiency and power density system design. Therefore, this paper proposes...

article

Review of Silicon Carbide Power Devices and Their Applications

Xu She, Alex Q. Huang, Oscar Lucia, Burak Ozpineci

IEEE Transactions on Industrial Electronics > 2017 > 64 > 10 > 8193 - 8205

Silicon carbide (SiC) power devices have been investigated extensively in the past two decades, and there are many devices commercially available now. Owing to the intrinsic material advantages of SiC over silicon (Si), SiC power devices can operate at higher voltage, higher switching frequency, and higher temperature. This paper reviews the technology progress of SiC power devices and their emerging...

article

Integration of DC Microgrids as Virtual Synchronous Machines Into the AC Grid

Dong Chen, Yizhe Xu, Alex Q. Huang

IEEE Transactions on Industrial Electronics > 2017 > 64 > 9 > 7455 - 7466

A smart and autonomous integration concept for dc microgrids into the legacy ac grid is proposed based on the virtual synchronous machine (VSM) concept. It utilizes a dc–ac converter as a universal VSM-based interface (VSMBI) between the ac grid and various distributed energy resources (DER) connected on the dc side. The control strategy of it includes: 1) a frequency regulation improved from previous...

article

Theoretical and Experimental Study of 22 kV SiC Emitter Turn-OFF (ETO) Thyristor

Xiaoqing Song, Alex Q. Huang, Meng-Chia Lee, Chang Peng

IEEE Transactions on Power Electronics > 2017 > 32 > 8 > 6381 - 6393

Controllable three terminal high voltage (

$>$

10 kV) power switches based on silicon carbide (SiC) material are gaining significant attentions since silicon (Si) power switches such as insulated gate bipolar transistors (IGBTs) are typically designed for much lower blocking voltages. After more than 30 years of commercial development, there is a fundamental limitation in designing Si IGBTs with...

article

Solid-State-Transformer-Interfaced Permanent Magnet Wind Turbine Distributed Generation System With Power Management Functions

Rui Gao, Xu She, Iqbal Husain, Alex Q. Huang

IEEE Transactions on Industry Applications > 2017 > 53 > 4 > 3849 - 3861

The higher penetration of wind energy poses increasing demand for grid support and power management functions of a wind energy conversion system (WECS). This paper investigates a medium-voltage solid-state transformer (SST)-interfaced permanent magnet synchronous generator system with integrated active power management and reactive power compensation functions. Specifically, a WECS consisting of wind...

chapter

Multi-objective optimization of medium voltage SiC DC-DC converter based on modular input-series-output-parallel (ISOP) architecture

Li Wang, Alex Q. Huang, Qianlai Zhu

2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia (IFEEC 2017 - ECCE Asia) > 627 - 632

2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia (IFEEC 2017 - ECCE Asia)

This paper aims to comprehensively investigate the efficiency, power density and overall cost of input series output parallel (ISOP) medium voltage (MV) all silicon carbide (SiC) DC-DC converter in solid state transformers (SST). The medium voltage capability can be achieved by using either high voltage devices or multiple low voltage cells in series. Voltage rating of semiconductor devices, magnetic...

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Keywords

SILICON CARBIDE (57)
SWITCHES (50)
MOSFET (47)
VOLTAGE CONTROL (35)
LOGIC GATES (33)
CAPACITORS (29)
SILICON (26)
INSULATED GATE BIPOLAR TRANSISTORS (17)
BATTERIES (15)
GALLIUM NITRIDE (14)
INDUCTORS (14)
INVERTERS (12)
RELIABILITY (12)
SIC (12)
SIC MOSFET (12)
SWITCHING FREQUENCY (12)
SWITCHING LOSS (12)
CIRCUIT BREAKERS (11)
DC-DC POWER CONVERTERS (11)
IGBT (11)
JFETS (11)
RECTIFIERS (11)
SCHOTTKY DIODES (11)
TOPOLOGY (11)
BRIDGE CIRCUITS (10)
INDUCTANCE (10)
MODULATION (10)
THYRISTORS (10)
ZERO VOLTAGE SWITCHING (10)
CONVERTERS (9)
JFET (9)
4H-SIC (8)
DC MICROGRID (8)
ENERGY STORAGE (8)
HIGH VOLTAGE (8)
JUNCTIONS (8)
LOW VOLTAGE (8)
MATHEMATICAL MODEL (8)
MICROGRIDS (8)
SOLIDS (8)
CAPACITANCE (7)
MEDIUM VOLTAGE (7)
PULSE WIDTH MODULATION (7)
RESISTANCE (7)
SOLID-STATE TRANSFORMER (7)
SOLID-STATE TRANSFORMER (SST) (7)
TRANSFORMER CORES (7)
CIRCUIT FAULTS (6)
CONTROL SYSTEMS (6)
HARMONIC ANALYSIS (6)
HEMTS (6)
HYBRID CIRCUIT BREAKER (6)
POWER TRANSFORMERS (6)
REACTIVE POWER (6)
RESONANT FREQUENCY (6)
SOLID STATE TRANSFORMER (6)
TEMPERATURE MEASUREMENT (6)
WIDE BAND GAP SEMICONDUCTORS (6)
CURRENT MEASUREMENT (5)
DC CIRCUIT BREAKER (5)
EDGE TERMINATION (5)
FREQUENCY CONTROL (5)
GAN (5)
HIGH FREQUENCY (5)
MICROGRID (5)
OPTIMIZATION (5)
PERFORMANCE EVALUATION (5)
SIMULATION (5)
TRANSIENT ANALYSIS (5)
WIND ENERGY (5)
WINDINGS (5)
ALUMINUM GALLIUM NITRIDE (4)
CARRIER-BASED UNIPOLAR MODULATION (4)
CASCADED MULTILEVEL CONVERTER (4)
CLAMPS (4)
DC-AC POWER CONVERTERS (4)
EMITTER TURN-OFF THYRISTOR (ETO) (4)
HIGH EFFICIENCY (4)
IMPEDANCE (4)
INTEGRATED CIRCUIT MODELING (4)
INTERRUPTERS (4)
JUNCTION TERMINATION EXTENSION (JTE) (4)
LEAKAGE CURRENTS (4)
MODFETS (4)
POWER HARMONIC FILTERS (4)
POWER MANAGEMENT (4)
SIC DEVICE (4)
SILICON CARBIDE (SIC) (4)
SILICON COMPOUNDS (4)
SMART GRID (4)
SST (4)
STEADY-STATE (4)
SURGES (4)
SWITCHING CIRCUITS (4)
SYSTEM-ON-CHIP (4)
VOLTAGE BALANCE (4)
VOLTAGE MEASUREMENT (4)
ACTIVE CLAMP (3)
AUTOMATIC VOLTAGE CONTROL (3)
BATTERY (3)
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IEEE Transactions on Power Electronics (18)
IEEE Transactions on Industrial Electronics (8)
Solid State Electronics (7)
IEEE Transactions on Industry Applications (6)
IEEE Journal of Emerging and Selected Topics in Power Electronics (4)
IEEE Transactions on Electron Devices (4)
IEEE Electron Device Letters (3)
IEEE Transactions on Smart Grid (2)
Applied Energy (1)
Electric Power Systems Research (1)
IEEE Industrial Electronics Magazine (1)
IEEE Transactions on Energy Conversion (1)
IEEE Transactions on Sustainable Energy (1)
Journal of Power Sources (1)
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INFONA - science communication portal

Search results for: Alex. Q. Huang

SiC Trench MOSFET With Integrated Self-Assembled Three-Level Protection Schottky Barrier Diode

Soft-Switched Modulation Techniques for an Isolated Bidirectional DC–AC

Active Damping of Ultrafast Mechanical Switches for Hybrid AC and DC Circuit Breakers

15-kV/40-A FREEDM Supercascode: A Cost-Effective SiC High-Voltage and High-Frequency Power Switch

Power Semiconductor Devices for Smart Grid and Renewable Energy Systems

A 98.3% Efficient GaN Isolated Bidirectional DC–DC Converter for DC Microgrid Energy Storage System Applications

Continuous switching operation of 15 kV FREEDM super-cascode

Data center power distribution system reliability analysis tool based on Monte Carlo next event simulation method

Design and optimization of the high frequency transformer for a 800V/1.2MHz SiC LLC resonant converter

Assessment of medium voltage SiC MOSFET advantages in medium voltage drive application

Design and implementation of a 7.2kV single stage AC-AC solid state transformer based on current source series resonant converter and 15 kV SiC MOSFET

Comparative study on the turn-off capability of multiple Si and SiC power devices

An improved SiC MOSFET-gate driver integrated power module with ultra low stray inductances

Wide Bandgap Devices and Power Conversion Systems—Part I

A SiC Power MOSFET Loss Model Suitable for High-Frequency Applications

Review of Silicon Carbide Power Devices and Their Applications

Integration of DC Microgrids as Virtual Synchronous Machines Into the AC Grid

Theoretical and Experimental Study of 22 kV SiC Emitter Turn-OFF (ETO) Thyristor

Solid-State-Transformer-Interfaced Permanent Magnet Wind Turbine Distributed Generation System With Power Management Functions

Multi-objective optimization of medium voltage SiC DC-DC converter based on modular input-series-output-parallel (ISOP) architecture

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