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A Negative Sequence Impedance Design and Regulation Strategy for Negative Sequence Current Sharing Among Grid-Forming Sources in Microgrids Considering Topology Impacts IEEE Open J. Power Electron. Pub Date : 2024-03-05 Dingrui Li, Chengwen Zhang, Zhihao Jiang, Yu Su, Yiwei Ma, Fred Wang, Leon M. Tolbert
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Investigation on the Degradation Mechanism of Si/SiC Cascode Device Under Repetitive Short-Circuit Tests IEEE Open J. Power Electron. Pub Date : 2024-02-27 Qiusheng Zhang, Hangzhi Liu, Yuming Zhou
The Si/SiC Cascode device has been widely accepted in various applications, however, its reliability issue still remains a major concern and needs to be extensively investigated. In this paper, the degradation of a 750 V Si/SiC Cascode device under repetitive short-circuit (SC) tests is investigated at 400 V DC-link voltage. Static and dynamic characteristics are measured before and after the repetitive
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Torque Ripple Suppression of BLDCM With Optimal Duty Cycle and Switch State by FCS-MPC IEEE Open J. Power Electron. Pub Date : 2024-02-21 Zicheng Li, Xiuwei Fan, Qingyao Kong, Jiang Liu, Sai Zhang
The traditional six-step commutation control method in brushless DC motors (BLDCM) often results in significant torque ripple, which limits its application in high-precision fields. This paper proposes a scheme that combines finite control set model predictive control (FCS-MPC) to suppress commutation torque ripple. The scheme utilizes an optimal duty cycle and optimal switch compensation state. By
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A New High Step-Up SC-Based Grid-Tied Inverter With Limited Charging Spike for RES Applications IEEE Open J. Power Electron. Pub Date : 2024-02-21 Milad Ghavipanjeh Marangalu, Naser Vosoughi Kurdkandi, Kourosh Khalaj Monfared, Iman Talebian, Yousef Neyshabouri, Hani Vahedi
Switched capacitor multilevel inverter topologies are attractive among industrial power electronics researchers due to their applicability in sustainable energy systems such as renewable energy source (RES) applications. In this paper, a new switched capacitor (SC)-based grid-tied seven-level inverter is proposed for renewable energy sources (RES) applications. The proposed inverter can generate a
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Paralleled SiC MOSFETs Circuit Breaker With a SiC MPS Diode for Avalanche Voltage Clamping IEEE Open J. Power Electron. Pub Date : 2024-02-14 Taro Takamori, Keiji Wada, Wataru Saito, Shin-ichi Nishizawa
This paper proposes a solid-state circuit breaker comprising silicon carbide (SiC) MOSFETs and a SiC diode, based on the principle of avalanche voltage clamping. The key challenge in realizing a solid-state circuit breaker lies in reducing conduction loss. A parallel connection of power semiconductor devices is the suitable configuration that can meet these requirements. However, in such a configuration
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Opportunities and Challenges of Advanced Testing Approaches for Multi-Megawatt Wind Turbines IEEE Open J. Power Electron. Pub Date : 2024-02-12 Florian Hans, Philipp Borowski, Jan Wendt, Gesa Quistorf, Torben Jersch
To safely integrate large numbers of wind turbines into the electric power grid, turbines must demonstrate compliance with grid codes and technical guidelines through rigorous testing. Such tests are traditionally performed using prototype turbines on designated measurement sites. So-called field tests offer little flexibility and repeatability, as factors such as wind and grid conditions cannot be
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A Stacked Piezoelectric Converter Using a Segmented IDT Lithium Niobate Resonator IEEE Open J. Power Electron. Pub Date : 2024-02-12 Weston D. Braun, Eric A. Stolt, Kristi Nguyen, Jeronimo Segovia-Fernandez, Sombuddha Chakraborty, Ruochen Lu, Juan M. Rivas-Davila
Piezoelectric resonators promise to increase dc-dc converter power density by replacing inductive components. However, piezoelectric resonators are not direct circuit level replacements for inductors, requiring new topologies. In this paper, we present a stacked converter using two piezoelectric resonators, providing improved efficiency at low conversion ratios. This converter is realized with a lithium
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Virtual Impedance Shaping for the Bus Conversion System in the Hybrid AC/DC Grid IEEE Open J. Power Electron. Pub Date : 2024-02-01 Sicong Jin, Huanyue Liao, Xin Zhang, Hao Ma, Changjiang Sun, Bin Guo
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Design and Optimization of a Planar Omnidirectional Wireless Power Transfer System for Consumer Electronics IEEE Open J. Power Electron. Pub Date : 2024-01-31 Xipei Yu, Junjie Feng, Liyan Zhu, Qiang Li
Recently, omnidirectional wireless power transfer (WPT) has gained increasing popularity due to its capability to charge in arbitrary positions and directions. However, existing solutions still face several challenges, including coupled coils, non-optimized structure, non-uniform magnetic field, and poor misalignment tolerance. This work proposes an omnidirectional WPT system with three fully decoupled
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High Power Density On-Board Charger Featuring Power Pulsating Buffer IEEE Open J. Power Electron. Pub Date : 2024-01-29 Hector Sarnago, Oscar Lucía
Power electronics plays a key role in electric vehicle technology in areas such as the battery charging and managing, dc distribution and motor drive systems, among others. There are, however, significant challenges to be addressed in terms of cost, performance, reliability and power density. This paper aims at proposing an improved on-board charger architecture taking advantage of a power pulsating
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Design of a 2.5 kW Four-Level Interleaved Flying Capacitor Multilevel Totem-Pole PFC Converter With AC-Side Passive Volume Optimization IEEE Open J. Power Electron. Pub Date : 2024-01-29 Naveed Ishraq, Ayan Mallik
In this article, a high-efficiency and high-density 2.5 kW four-level interleaved flying capacitor multilevel (FCML) totem-pole bridgeless power-factor-correction (PFC) rectifier with 200 V GaN devices is analyzed, designed, and tested. This 2.5 kW four-level continuous conduction mode (CCM) GaN totem pole PFC operates with three times inductor current ripple frequency than that of the switching frequency
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A Bidirectional DC–DC Converter With Direct Power Transfer IEEE Open J. Power Electron. Pub Date : 2024-01-29 Sajjad Goudarzitaemeh, Majid Pahlevani
This paper presents a novel bidirectional DC–DC converter for several applications such as energy storage systems. The proposed power circuit topology not only has inherent soft switching but also offers reduced conduction losses. The reduction in conduction losses is achieved through a direct power transfer (DPT) path, which can effectively bypass the transformer as well as power semiconductors at
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A Delta-Sigma Modulated Power Converter With Inherent Zero-Voltage Switching IEEE Open J. Power Electron. Pub Date : 2024-01-29 BART F. J. BOKMANS, Bas J. D. Vermulst, Jan M. Schellekens, Henk Huisman
In this paper an advanced modulation strategy is proposed that generates the switch control signals of a power converter while inherently guaranteeing zero-voltage switching (ZVS) operation. The proposed modulator is based on a first-order $\Delta \Sigma$ -modulator combined with a hold-off circuit. This hold-off circuit consists of a D-latch and maintains the converter's switching state until ZVS
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Comprehensive Analysis and Stabilization of a B2B HVDC System Connecting Two Extremely Weak Grids Considering the Impact of Power Feedforward Compensation IEEE Open J. Power Electron. Pub Date : 2024-01-26 Hassanien Ramadan A. Mohamed, Yasser Abdel-Rady I. Mohamed
Back-to-Back (B2B) HVDC systems can enhance cross-regional transmission capacity and overall power system stability. However, their use in interconnecting two extremely weak grids can compromise system stability. This paper presents a comprehensive stability analysis of a B2B HVDC system to distinguish the root causes of instability mechanisms and identify the critical short circuit ratio (CSCR) of
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Mitigating EMI Noise in Propagation Paths: Review of Parasitic and Coupling Effects in Power Electronic Packages, Filters, and Systems IEEE Open J. Power Electron. Pub Date : 2024-01-24 Niu Jia, Lingxiao Xue, Han Cui
The wide applications of wide-bandgap (WBG) devices in power electronics systems bring benefits in higher switching speed, frequency, and power density, but also cause severe electromagnetic interference (EMI) issues. While many EMI mitigation methods are available to reduce the noise generated from the source (i.e., switching WBG devices), it is equally important to analyze and control the EMI propagation
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Closed-Form Solutions for Grid-Forming Converters: A Design-Oriented Study IEEE Open J. Power Electron. Pub Date : 2024-01-23 Fangzhou Zhao, Tianhua Zhu, Lennart Harnefors, Bo Fan, Heng Wu, Zichao Zhou, Yin Sun, Xiongfei Wang
This paper derives closed-form solutions for grid-forming converters with power synchronization control (PSC) by subtly simplifying and factorizing the complex closed-loop models. The solutions can offer clear analytical insights into control-loop interactions, enabling guidelines for robust controller design. It is proved that 1) the proportional gains of PSC and alternating voltage control (AVC)
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13.8 kV, 5 MVA Medium Voltage Test Facility: Design, Implementation and Lessons Learned IEEE Open J. Power Electron. Pub Date : 2024-01-23 Brandon M. Grainger, Daniel J. Carnovale
Hands-on, testing laboratories are fundamental to technical learning environments in universities. The need for modern equipment in these labs to support industry research and testing is often cost prohibitive and students and professors rely on a random collection of donated and often outdated equipment. This article focuses on the creation of a state-of-the-art medium voltage electrical power technologies
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166 kW Liquid-Insulated Medium-Frequency Transformer With Hybrid Foil-Litz Windings IEEE Open J. Power Electron. Pub Date : 2024-01-16 Andrea Cremasco, Daniel Rothmund, Marco Milone, Sudheer Mokkapaty, Elena A. Lomonova
The safe operation of high-power solid-state transformers (SSTs) in medium-voltage grid-connected applications relies on medium-frequency transformers (MFTs). In MFTs, hybrid foil-litz windings present a cost-effective alternative to litz wire, since foil is employed as the main conductor. This innovative topology exhibits lower ohmic losses than conventional foil windings. Besides, the dielectric
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Design and Evaluation of a 6.5 kV, 400 A Super-Cascode Power Module IEEE Open J. Power Electron. Pub Date : 2024-01-12 Sergio Jimenez, Andrew Lemmon, Arthur Boutry
As the demand for medium-voltage power semiconductors continues to rise, the super-cascode switch has emerged as a promising solution. This paper presents the design, implementation, and experimental evaluation of a 6.5 kV, 400 A super-cascode power module. This treatment includes an in-depth analysis of the theory of operation for this topology, as well as a set of design guidelines to facilitate
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Extension of the Stray Voltage Capture Short-Circuit Detection Method to a 6-Phase Fault-Tolerant Dual-Motor Drive IEEE Open J. Power Electron. Pub Date : 2024-01-10 Mustapha Al Sakka, Farzad Hosseinabadi, Thomas Geury, Mohamed El Baghdadi, Monzer Al Sakka, Omar Hegazy
This article investigates and validates the applicability of the recently developed stray voltage capture (SVC) ultra-fast short-circuit (SC) detection method and its extended version (ESVC) to fault-tolerant multi-motor drives. As these methods are system-based, a fault localization algorithm is also developed. Simulation analysis of the inverter stray inductances shows additional challenges for the
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Control Scheme for the Lagging Power Factor Operation of a Single-Phase Grid-Connected Inverter Using an Unfolding Circuit IEEE Open J. Power Electron. Pub Date : 2024-01-09 Yasuhiko Miguchi, Hidemine Obara, Atsuo Kawamura
A single-phase grid-connected inverter with an unfolding circuit typically consists of a first-stage dc/dc converter, which generates fully rectified sinusoidal waveforms, and a second-stage unfolding inverter, which switches every 180° of the line frequency waveform. This converter exhibits low switching loss and high efficiency, and the operating principle of the unfolding inverter typically includes
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A Neutral Point Balancing and Voltage Error Compensation Approach for Fault-Tolerant 3-Level Inverters IEEE Open J. Power Electron. Pub Date : 2023-12-25 Johannes Häring, Maximilian Hepp, Wolfgang Wondrak, Mark-M. Bakran
Neutral point clamped inverters, such as NPC, ANPC, or T-Type inverters, have emerged as competitive solutions for specific automotive traction applications due to the increase in DC-link voltage levels up to $800 \,\mathrm{V}$ . Besides improved harmonic performance, certain 3-level inverter structures can provide a reconfigured failure mode operation in case of a semiconductor failure by applying
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Switching Loss Reduction for an MMC-Fed AC/DC Converter IEEE Open J. Power Electron. Pub Date : 2023-12-14 Kaveh Pouresmaeil, Maurice G.L. Roes, Nico H. Baars, Cornelis G.E. Wijnands
Medium-voltage connected ultra-fast chargers are getting more popular for charging electric vehicles with large battery capacities. Here, the solution based on a modular multilevel converter is more promising, since the isolation stage can be realized as a single medium-frequency transformer interconnecting the modular multilevel converter to a single-phase ac/dc converter. A new operating scheme is
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Survey of Real-World Grid Incidents–Opportunities, Arising Challenges and Lessons Learned for the Future Converter Dominated Power System IEEE Open J. Power Electron. Pub Date : 2023-12-14 Jan Wachter, Lutz Gröll, Veit Hagenmeyer
To reach the climate goals set by national and international institutions, a vast transition of the legacy power system is unavoidable. The necessary integration of distributed, renewable generation devices, which are often interfaced with power electronic converters, has a non-negligible influence on the characteristics of the power grid. This is particularly visible during abnormal grid conditions
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Novel Figures of Merit for Evaluating the Performance of the Super-Cascode Switch IEEE Open J. Power Electron. Pub Date : 2023-12-14 Sergio Jimenez, Andrew Lemmon, Arthur Boutry
The super-cascode switch (SCS) has gained significant attention in the last decade due to its ability to achieve medium-voltage ratings using low-voltage semiconductors. However, there exists a notable absence of quantitative metrics to effectively evaluate the performance of the SCS. This gap exists because the behavior of the SCS is different from that of a traditional semiconductor switch, and traditional
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Analysis and Optimization of the Loss Distribution for a Two Stage AC/DC Power Supply IEEE Open J. Power Electron. Pub Date : 2023-12-12 Lukas Fräger, Jens Friebe
This paper presents the analysis and optimization procedure of a two-stage bidirectional AC/DC power supply. The exemplary power supply consists of a silicon carbide based active front end and a dual active bridge DC/DC converter. It is designed to supply 600 V DC applications from universal low voltage AC grids with a power up to 6 kW. The paper includes the topology and design considerations, as
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Comprehensive Overview of Power Electronics Intensive Solutions for High-Voltage Pulse Generators IEEE Open J. Power Electron. Pub Date : 2023-12-07 Yingjian Zhuge, Junrui Liang, Minfan Fu, Teng Long, Haoyu Wang
With the advancements in power semiconductors and converters, power electronics based high-voltage pulse generators (HVPG) have emerged due to their advantages of high repetition rate, flexible control, long lifetime, and compact size. However, there is a lack of comprehensive literature review on recent advances in power electronics intensive HVPG technologies. To fill this gap, we present a systematic
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Dynamic Interactions and Stabilization of Weak Grid-Tied Parallel VSCs and Parallel CSCs Systems Considering PVG Dynamic Resistance IEEE Open J. Power Electron. Pub Date : 2023-12-07 Md. Mizanur Rahman, Yasser Abdel-Rady I. Mohamed
The parallel operation of power converters is essential to meet increased power demands. However, due to dynamic coupling, the instability in one converter can affect the stability of another. Therefore, this paper analyses the interaction and stability differences among the weak grid-tied photovoltaic (PV)-interfaced parallel voltage- and current-source converters (VSCs and CSCs) considering the PV
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Robust Model Predictive Control of a Renewable Energy Converter Under Parametric Uncertainty Conditions IEEE Open J. Power Electron. Pub Date : 2023-12-04 Jefferson S. Costa, Angelo Lunardi, Darlan A. Fernandes, Alfeu J. Sguarezi Filho
The advanced control technique Model predictive control (MPC) is gaining popularity in power electronics for converters with distributed energy resources. It combines closed-loop control and minimizes errors and control effort. As a model-based control technique, MPC's performance can degrade due to plant disturbances, such as parametric errors or large perturbations in grid voltage or load current
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Grid-Side Current Improvement With Direct Digital Control and Capacitor Voltage Feedforward to Mitigate Distorted Grid Currents for 3Φ3W LCL Grid-Connected Inverter Under Distorted Grid Voltages IEEE Open J. Power Electron. Pub Date : 2023-11-30 Tsai-Fu Wu, Ching-Chih Chan, Yun-Hsiang Chang, Jui-Yang Chiu, Chien-Chih Hung, Tzu-Hsien Chuang
A three-phase three-wire LCL grid-connected inverter is usually used as an interface between renewable-energy sources and grid. However, grid voltage is always distorted and results in grid-current distortion when there is no control at the filter-capacitor current. This article presents the grid-current improvement with inverter-side-current direct digital control and capacitor voltage feedforward
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Numerically Efficient Average-Value Model for Voltage-Source Converters in Nodal-Based Programs IEEE Open J. Power Electron. Pub Date : 2023-11-30 SEYYEDMILAD EBRAHIMI, Taleb Vahabzadeh, Juri Jatskevich
Discrete detailed models of high-frequency switching voltage source converters (VSCs) are accurate but computationally expensive in simulations of large power-electronics-based systems. For fast/efficient studies, the average-value models (AVMs) of VSCs have proven indispensable, which conventionally utilize controlled voltage/current sources to interface with external circuits. In nodal-analysis-based
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A Simple and Non-Destructive Method to Measure Per-Terminal Baseplate Coupling of Power Modules IEEE Open J. Power Electron. Pub Date : 2023-11-20 Brian T. DeBoi, Andrew Lemmon, Austin Curbow
The fast slew rates of wide bandgap semiconductors can produce common-mode currents that flow through the baseplates of multi-chip power modules. These currents increase the electromagnetic signature of these devices and force designers to reduce edge rates or add additional filters in order to meet compliance standards. Parasitic baseplate capacitances that exist within power module packaging are
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A Pareto Based Comparison of DC/DC Converters for Variable DC-Link Voltage in Electric Vehicles IEEE Open J. Power Electron. Pub Date : 2023-11-15 Timijan Velić, Yannik Becher, Nejila Parspour
High battery voltages increase inverter switching and harmonic losses of the electric machine. These losses dominate at low speeds in the partial load range, where the customer relevant Worldwide Harmonized Light Vehicles Test Procedure (WLTC) driving cycle is located. By installing a bidirectional DC/DC converter between the inverter and the battery, the input voltage of the inverter can be adjusted
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The Kopernikus ENSURE Co-Demonstration Platform IEEE Open J. Power Electron. Pub Date : 2023-11-13 Gert Mehlmann, Uwe Kühnapfel, Felix Wege, Alexander Winkens, Christian Scheibe, Steffen Vogel, Peter Noglik, Michael Gratza, Julian Richter, Moritz Weber, Ilya Burlakin, Ananya Kuri, Timo Wagner, Sebastian Hubschneider, Rafael Poppenborg, Tobias Heins, Kevin Förderer, Andreas Ulbig, Antonello Monti, Veit Hagenmeyer, Matthias Luther
The Kopernikus ENSURE Co-Demonstration Platform enables the investigation of components and processes for the changing power system with grid models adapted to the respective problem. The platform is developed from the power system's perspective. A central aspect of the platform is to analyze several technical solutions of different stakeholders in shared power system models. Furthermore the platform
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Machine Learning Enabled Cluster Grouping of Varistors in Parallel-Structured DC Circuit Breakers IEEE Open J. Power Electron. Pub Date : 2023-11-10 Shuyan Zhao, Yao Wang, Reza Kheirollahi, Zilong Zheng, Fei Lu, Hua Zhang
This letter presents the first ever trial of machine learning enabled cluster grouping of varistors for DC circuit breakers (DCCBs). It reveals that the manufacturing discrepancy of varistors is a main challenge in their parallel connection. The proposed cluster grouping concept is introduced to classify varistors according to the interruption characteristic, in which the K -means algorithm is adopted
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Remaining Useful Lifetime Prediction of Discrete Power Devices by Means of Artificial Neural Networks IEEE Open J. Power Electron. Pub Date : 2023-11-10 Alessandro Vaccaro, Davide Biadene, Paolo Magnone
This work proposes a deep learning-based model for predicting the lifetime of power devices subjected to power cycling. To this purpose, a neural network based on bidirectional long short-term memory is adopted. The neural network is trained with experimental on-voltage degradation profiles. The application of the proposed method is based on the monitoring of a precursor, that is the on-voltage degradation
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A New Class of Modular Multilevel Converter for Direct AC-AC Conversion IEEE Open J. Power Electron. Pub Date : 2023-11-09 Anjana Wijesekera, Yuan Li, Gregory J. Kish
This article introduces the modular multilevel ac/ac converter (M2AC) which capitalizes on a new partial power processing mechanism (P3M) to achieve direct voltage transformation in single frequency power systems. The proposed P3M allows direct voltage transformation using only half-bridge submodules (HBSM) by harnessing internally circulating dc currents to achieve the charge balance of the submodule
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A Review of DC-DC Resonant Converter Topologies and Control Techniques for Electric Vehicle Applications IEEE Open J. Power Electron. Pub Date : 2023-11-08 Guvanthi Abeysinghe Mudiyanselage, Niloufar Keshmiri, Ali Emadi
Resonant converters are attractive for DC-DC converter applications of electric vehicles (EVs) due to their wide range of soft switching and less output filter requirements compared to dual active bridge (DAB) converters. However, the design and control implementation of resonant converters is comparatively challenging due to the nonlinearities introduced with the resonant tank. LLC and CLLC resonant
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Steady-State and Transient Modeling of the Series Resonant Balancing Converter IEEE Open J. Power Electron. Pub Date : 2023-10-31 Igor Lopušina, Yann E. Bouvier, Petar J. Grbović
The active voltage balancing device is a necessary part of some modern power electronics applications. Among numerous possible hardware solutions, the Series Resonant Balancing Converter shows advantages in terms of efficiency and low complexity, due to the soft-switching capability and stable operation in the open-loop. This paper models the steady-state operation of Series Resonant Balancing Converter
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Multi-Pulse Si-MOSFET Gate Driving Utilizing Gate Loop Inductance IEEE Open J. Power Electron. Pub Date : 2023-10-31 Jan Hammer, Ignacio Galiano Zurbriggen, Martin Ordonez
Gatedriving circuits are a crucial part of the safety, compliance, and performance of switched-mode power converters. Traditionally, these circuits use a single pulse and employ a gate resistor to control silicon (Si) MOSFETs. Unfortunately, the performance of this approach is limited by parasitic inductances, which can cause excessive oscillations, voltage stress, and catastrophic false turn-ON failures
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Detailed Parametric Modeling of AC–DC Converters for EMT Simulators IEEE Open J. Power Electron. Pub Date : 2023-10-27 Parastoo Sadat Hosseinian, Seyyedmilad Ebrahimi, Juri Jatskevich
Detailed switching models of ac–dc converters are available in many offline and real-time electromagnetic transient (EMT) simulation programs. However, such discrete models typically require small simulation time steps for accurately handling the switching events without interpolation. This paper proposes a new parametric modeling approach for line-commutated and 2-level voltage-source ac–dc converters
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Hardware-Based Comparative Analysis of Multilevel Inverter Topologies for Integrated Motor Drives Considering Overload Operation IEEE Open J. Power Electron. Pub Date : 2023-10-25 Gwendolin Rohner, Tino Gfrörer, Pascal S. Niklaus, Jonas Huber, Dominik Bortis, Mario Schweizer, Johann W. Kolar
With today's demand for increased industrial process automation a trend towards Integrated Motor Drives (IMDs) has evolved allowing a low complexity and compact installation of the drive system. Especially servo applications with high short-term overload requirements (e.g., three times the nominal current for several seconds) are a thermal challenge for the power electronics. Consequently, high efficiencies
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Electrothermal Power Cycling to Failure of Discrete Planar, Symmetrical Double-Trench and Asymmetrical Trench SiC MOSFETs IEEE Open J. Power Electron. Pub Date : 2023-10-23 Juefei Yang, Saeed Jahdi, Renze Yu, Bernard Stark
While SiC MOSFETs are now being utilized in industry their robustness under heavy-duty applications still remains a concern. In this paper, the results of experimental measurements of degradation to failure of different structured SiC power MOSFETs, namely the planar, symmetrical double-trench and asymmetrical trench structures are presented following electrothermal stressing by power cycling to beyond
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Improved Robust LQR Digital Control Method for High Bandwidth Inverters With Time Delay and Uncertain Parameters IEEE Open J. Power Electron. Pub Date : 2023-10-16 Jichao Ning, Hongqi Ben, Xuesong Wang, Tao Meng
A feedforward combined with state feedback linear quadratic regulator (LQR) is proposed to reduce the output waveform distortion and load regulation of high-bandwidth inverters. However, when digital control is adopted, the additional delays introduced by each part can lead to unmodeled model errors, which not only seriously affects the stability of the system, but also complicates the design of the
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EMI Mitigation for SiC MOSFET Power Modules Using Integrated Common-Mode Screen IEEE Open J. Power Electron. Pub Date : 2023-10-16 Taha Moaz, Narayanan Rajagopal, Christina DiMarino, Michael Fish
Electromagnetic interference (EMI) remains a critical roadblock to fully benefitting from the various advantages provided by wide-bandgap devices. Of particular concern is the common-mode (CM) emissions generated during the device operation. This work aims to inform EMI mitigation strategies that can be implemented at the power module design stage and that can result in modules with lower noise emissions
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Control Performance Characterization and Monitoring Scheme for Power Converters in Weak Grids IEEE Open J. Power Electron. Pub Date : 2023-10-10 Jiachen Wang, Qing Liu, Xiangchen Zeng, Weijian Han, Zhen Xin
In weak grids, control performance of power converters is negatively affected by the significantly varied grid impedance, which can easily lead to degradation of anti-harmonic performance, resonances or even system instability. A rapid control performance monitor is therefore proposed in this work to acquire power converters’ actual performance indexes, i.e., the crossover frequency and phase margin
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Design of SiC-Si Hybrid Interleaved 3-Phase 5-Level E-Type Back-to-Back Converter IEEE Open J. Power Electron. Pub Date : 2023-10-13 Marco di Benedetto, Alessandro Lidozzi, Petar J. Grbović
In modern applications, such as variable frequency electric drives, aircraft propulsion, electric vehicles, and uninterruptible power supply units, high power-dense, and efficient AC-AC power converters are the key to reducing power losses, thus limiting the overall costs, and improving the system's reliability. Power electronic equipment can be enhanced thanks to the continuous evolution of conversion
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An AC Voltage Balancer and its Improved Modulation Strategy for CHB Based PV Inverters IEEE Open J. Power Electron. Pub Date : 2023-10-03 Jianbo Jiang, Enming Zhao, Lin Yang, Peng Li, Nianting Yang
Cascaded H-bridge (CHB) inverters have been widely used in distributed photovoltaic (PV) power generation systems due to their attractive features in terms of power quality and easy to expand compared to two-level or three-level inverters. Especially the modular inverters with an interphase structure composed of four-port isolated DC/DC converters and CHB inverters are preferred by academia and industry
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ZVS-Optimized Constant and Variable Switching Frequency Modulation Schemes for Dual Active Bridge Converters IEEE Open J. Power Electron. Pub Date : 2023-09-27 Dingsihao Lyu, Coen Straathof, Thiago Batista Soeiro, Zian Qin, Pavol Bauer
This paper proposes two modulation schemes for Dual Active Bridge (DAB) converters, with the aim of maximizing Zero Voltage Switching (ZVS) operation over a wide operational range. The first is a ZVS-optimized constant frequency modulation scheme, constructed based on the boundary conditions of ZVS operation. This scheme maximizes the number of ZVS events across a broad operational range and is easy
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An Optimal Control Strategy for the DAB-Based Partial Power Converter Based on Extended-Phase-Shift Control IEEE Open J. Power Electron. Pub Date : 2023-09-26 Shanshan Gao, Yixue Zhang, Yijie Wang, Jianxing Liu, Dianguo Xu
Dual active bridge (DAB) converters are extensively used due to the advantages of wide voltage regulation range and easy realization of soft switching. Besides, the concept of partial power converters (PPCs) has been widely applied to increase the converter efficiency by reducing the power actually processed by the converter. Therefore, in this article, the DAB converter and PPC are combined. And a
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ZVS Turn-on Triangular Current Mode (TCM) Control for Three-Phase Two-Level Converters With Reactive Power Control IEEE Open J. Power Electron. Pub Date : 2023-09-25 Nidhi Haryani, Sung Jae Ohn, Rolando Burgos
High switching frequency operation in power converters leads to a significant reduction in size at the cost of increased switching losses. Thus, soft switching techniques become necessary to reduce the losses. WBG devices have the benefit of low turn-off losses, but the turn-on losses are still significant. Triangular Current Mode (TCM) control can achieve zero voltage switching (ZVS) turn-on without
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Robust Optimization of a Wireless Power Transfer Coupler Against Manufacturing and Fabrication Tolerances IEEE Open J. Power Electron. Pub Date : 2023-09-25 Sampath Jayalath, Azeem Khan
The design variables are optimized to improve the overall performance of wireless power transfer (WPT) coils or couplers. However, failure to consider their uncertainties and tolerances will lead to variations in the performance targets of a WPT system and mass-scale production of couplers cannot afford performance variation from one coupler to another. Therefore, this article proposes a stochastic-based
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A Comparison of the Hard-Switching Performance of 650 V Power Transistors With Calorimetric Verification IEEE Open J. Power Electron. Pub Date : 2023-09-14 Daniel J. Rogers, Jack Bruford, Aleksandar Ristic-Smith, Kawsar Ali, Patrick Palmer, Edward Shelton
We compare the switching losses of four equivalent silicon and wide-bandgap 650 V power transistors operated in a hard-switched half-bridge configuration, switching 400 V at 40 A. Each transistor is mounted on an identical PCB and driven by a gate drive circuit matched to its requirements. Switching speed is maximised by a PCB design featuring very low parasitic inductance and the use of zero external
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Floating Capacitor Integrated DAB for Single-Phase, Single-Stage PFC in Wireless Battery Charging Application IEEE Open J. Power Electron. Pub Date : 2023-09-08 Itziar Alzuguren, Asier Garcia-Bediaga, Ander Avila, Alejandro Rujas, Miroslav Vasić
In this article, a novel active power decoupling topology called Floating Capacitor Integrated Dual Active Bridge (FCI-DAB) for single-phase, single-stage AC-DC solutions is introduced. The main point of the circuit is an active energy buffer that compensates the power fluctuation at double the grid frequency. The power decoupling filter is composed by a floating capacitor and a full-bridge; and is
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Performance Prediction of Direct Torque-Controlled PMSM Drives Considering Different Pulse Selectors Using FEA-Based Model IEEE Open J. Power Electron. Pub Date : 2023-09-05 Ahmed Nasr, Chunyang Gu, Jing Li, Giampaolo Buticchi, Salman Ijaz, Chris Gerada, He Zhang
Despite the robustness and fast dynamic response, direct torque control (DTC) exhibits relatively large ripples in torque and flux during steady-state operation. Mitigating these ripples depends on designing a pulse selector to identify the optimal voltage vector at every control cycle, which has been reported with different structures in the literature. Hence, it is becoming increasingly crucial to
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Modeling and Emulation of a Synchronous Generator Considering Unbalanced Load Conditions IEEE Open J. Power Electron. Pub Date : 2023-08-30 Dingrui Li, Yu Su, Haiguo Li, Fred Wang
Power electronics converters can be applied as emulators to mimic different grid components used for system behavior analyses and control validation. Synchronous generators (SGs) are the major sources of electric grids. Converter-based SG emulators have been developed for system stability analysis, fault analysis, and frequency support. However, existing SG emulators have not considered the impacts
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Machine Learning-Based Cyber-Attack Detection in Photovoltaic Farms IEEE Open J. Power Electron. Pub Date : 2023-08-29 Jinan Zhang, Lulu Guo, Jin Ye, Annarita Giani, Ahmed Elasser, Wenzhan Song, Jianzhe Liu, Bo Chen, H. Alan Mantooth
In this article, a machine learning technique is proposed for the detection of cyber-attacks in Photovoltaic (PV) farms using point of common coupling (PCC) sensors alone. A comprehensive cyber-attack model of a PV farm is first developed to consider operating conditions variability. The attack model specifically includes two types of cyber-attacks that are historically more difficult to detect. A
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Optimal Common-Mode Voltage Injection for Phase-Modular Three-Phase PFC Rectifiers Minimizing Energy Buffering Requirement IEEE Open J. Power Electron. Pub Date : 2023-08-28 David Menzi, Valentin Marugg, Thomas Langbauer, Johann W. Kolar
Realizing an isolated three-phase Power Factor Correction (PFC) ac-dc converter as a phase-modular system, i.e., by star-connecting three single-phase PFC rectifier front-ends with individual isolated dc-dc converter stages generating a common dc output voltage advantageously facilitates the use of standard single-phase converter modules. Further the low dc-link voltage level of typically $400 \,{\rm
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Analytical Model for HF-Losses Caused by 2D Magnetic Fields in Litz Wire IEEE Open J. Power Electron. Pub Date : 2023-08-28 Qingchao Meng, Jürgen Biela
The 2D magnetic field effect arises when the winding height is lower than the window height due to isolation requirements and mechanical constraints. In this situation, most analytical models for calculating HF-losses in Litz wire fail to predict the winding losses accurately since they are normally based on a 1D magnetic field assumption. Although numerical or semi-numerical methods can accurately
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Large- and Small-Signal Modeling Derived Loss Optimal Power Loop Decoupling Mechanism of TAB Converter IEEE Open J. Power Electron. Pub Date : 2023-08-11 Saikat Dey, Ayan Mallik
This article presents a precisely synthesized full order as well as reduced order continuous time large signal and small signal model of a hybrid phase-duty controlled triple-active bridge (TAB) converter based on higher order harmonic frequency inclusive averaging model. Such model helps to accurately predict the steady state circuit parameters such as inductor current, average output voltage, output