Pub Date : 2025-04-28DOI: 10.1109/OJIA.2025.3563688
Paychuda Kritprajun;Leon M. Tolbert;Elizabeth Sutton;Yunting Liu;Jingxin Wang;Nattapat Praisuwanna;Maximiliano Ferrari
As the utilization of supercapacitors (SCs) in power system applications continues to increase, it is important to observe their behavior under transient and long-term operations to understand their impact on power grids. A real-time reconfigurable hardware testbed (HTB) is a power network emulator that provides flexibility in studying various power system scenarios. This work presents an emulation of a SC for a photovoltaic (PV) system on the HTB platform such that its dynamic behavior during power system scenarios can be observed. The developed emulator on the HTB is verified by comparing the emulation results with the model developed in MATLAB/Simulink. An improvement of grid frequency support control is proposed to enable fast-frequency recovery service provided by a grid-connected PV with SC system. The experimental results of the emulator are consistent with the simulation results under grid support scenarios. This SC emulator can potentially be used for various power system scenarios supporting other research in addition to the PV applications presented in this article.
{"title":"Converter-Based Supercapacitor Emulator for Photovoltaic Applications","authors":"Paychuda Kritprajun;Leon M. Tolbert;Elizabeth Sutton;Yunting Liu;Jingxin Wang;Nattapat Praisuwanna;Maximiliano Ferrari","doi":"10.1109/OJIA.2025.3563688","DOIUrl":"https://doi.org/10.1109/OJIA.2025.3563688","url":null,"abstract":"As the utilization of supercapacitors (SCs) in power system applications continues to increase, it is important to observe their behavior under transient and long-term operations to understand their impact on power grids. A real-time reconfigurable hardware testbed (HTB) is a power network emulator that provides flexibility in studying various power system scenarios. This work presents an emulation of a SC for a photovoltaic (PV) system on the HTB platform such that its dynamic behavior during power system scenarios can be observed. The developed emulator on the HTB is verified by comparing the emulation results with the model developed in MATLAB/Simulink. An improvement of grid frequency support control is proposed to enable fast-frequency recovery service provided by a grid-connected PV with SC system. The experimental results of the emulator are consistent with the simulation results under grid support scenarios. This SC emulator can potentially be used for various power system scenarios supporting other research in addition to the PV applications presented in this article.","PeriodicalId":100629,"journal":{"name":"IEEE Open Journal of Industry Applications","volume":"6 ","pages":"178-190"},"PeriodicalIF":7.9,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10978069","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143925247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-04-25DOI: 10.1109/OJIA.2025.3564501
Anant Narula;Massimo Bongiorno;Paolo Mattavelli;Mebtu Beza;Jan R. Svensson;Wentao Liu
The increasing penetration of converter-interfaced generation units results in a frequency-weak power system characterized by decreasing system inertia. Consequently, the angular frequency of the power system may deviate from its nominal value, with its dynamics significantly influenced by the various control loops of converters. To accurately conduct small-signal analysis of such power systems, two impedance-based modeling approaches have been proposed in recent years. The first approach derives small-signal models in a synchronously rotating reference frame, also referred to as the dq-frame, which is defined by the power system's nominal angular frequency. This method characterizes individual converter systems using only their dq-domain impedance matrix. The second approach, on the other hand, develops small-signal models in a dq-frame defined by the dynamic angular frequency of the power system. In this case, converter systems are characterized not only by their dq-impedance matrix but also by an additional transfer matrix that relates variations in the output current to variations in the power system's angular frequency. This leads to different closed-loop transfer matrices for the two approaches, which are used to assess small-signal stability. This article shows, using the derived analytical models, that despite the differences in the closed-loop transfer matrices, the two impedance-based modeling approaches are equivalent and lead to the same conclusions regarding the small-signal stability of the overall system. However, the second approach offers better physical insight into the behavior of converter systems during disturbances. Experimental results are provided to validate the theoretical analysis.
{"title":"Evaluation and Comparison of Small-Signal Characteristics of Grid-Forming Converter Systems in Two Different Reference Frames","authors":"Anant Narula;Massimo Bongiorno;Paolo Mattavelli;Mebtu Beza;Jan R. Svensson;Wentao Liu","doi":"10.1109/OJIA.2025.3564501","DOIUrl":"https://doi.org/10.1109/OJIA.2025.3564501","url":null,"abstract":"The increasing penetration of converter-interfaced generation units results in a frequency-weak power system characterized by decreasing system inertia. Consequently, the angular frequency of the power system may deviate from its nominal value, with its dynamics significantly influenced by the various control loops of converters. To accurately conduct small-signal analysis of such power systems, two impedance-based modeling approaches have been proposed in recent years. The first approach derives small-signal models in a synchronously rotating reference frame, also referred to as the <italic>dq</i>-frame, which is defined by the power system's nominal angular frequency. This method characterizes individual converter systems using only their <italic>dq</i>-domain impedance matrix. The second approach, on the other hand, develops small-signal models in a <italic>dq</i>-frame defined by the dynamic angular frequency of the power system. In this case, converter systems are characterized not only by their <italic>dq</i>-impedance matrix but also by an additional transfer matrix that relates variations in the output current to variations in the power system's angular frequency. This leads to different closed-loop transfer matrices for the two approaches, which are used to assess small-signal stability. This article shows, using the derived analytical models, that despite the differences in the closed-loop transfer matrices, the two impedance-based modeling approaches are equivalent and lead to the same conclusions regarding the small-signal stability of the overall system. However, the second approach offers better physical insight into the behavior of converter systems during disturbances. Experimental results are provided to validate the theoretical analysis.","PeriodicalId":100629,"journal":{"name":"IEEE Open Journal of Industry Applications","volume":"6 ","pages":"206-220"},"PeriodicalIF":7.9,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10976625","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143925246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-04-23DOI: 10.1109/OJIA.2025.3563851
Nabil Karania;Mohamad Alaaeddin Alali;Stefano Di Gennaro;Jean–Pierre Barbot
This article presents a compact structure ofshunt active photovoltaic filter based on a cascaded H-bridge multilevel inverter (SAF-PV/CHB-MLI) to eliminate electrical perturbations caused by nonlinear loads and to generate MPPT of PV generators. The SAF-PV/CHB-MLI structure, while injecting the maximum current of PV generators, opts to increase the apparent switching frequency, reduces the coupling/output filter size, improves grid-side power quality, generates sinusoidal-like output stepping voltage, and minimizes voltage stresses on IGBTs devices. To achieve these objectives, the SAF-PV/CHB-MLI structure is configured for an HB module per phase/cluster, combined with an appropriate common control strategy for both active filtering and PV generation. The $p - q$ current identification algorithm is adapted/modified to include a P&O algorithm for MPPT detection and a developed PLL to ensure reliable operation under grid distortion conditions. The common control strategy comprises three complementary control loops: the injected current controller for perturbation compensation and maximum PV current injection, the individual cluster voltage balancing controller, and the overall dc voltage regulator which is incorporated within the adapted/modified p-q algorithm. Then, a multicarriers phase-shifted pulsewidth modulation is adopted to ensure the required individual and apparent switching frequencies, while reducing the sideband harmonic components’ impact. A tradeoff among the HB modules number, IGBTs rating, individual and apparent switching frequencies, and the accumulative output voltage is elaborated to create reliable and economical structure that meets industrial application recommendations. To validate the proposed structure's performance, a case study is conducted for textile industrial factory suffering from harmonic impact on its main sensitive load (SL) textile machine of almost 50 kVA; site measurements using power-quality analyzer devices are collected. A numerical model of the factory's network was developed to investigate the proposed structure performance on SL.
{"title":"Advanced High Switching-Frequency Cascaded H-Bridge Multilevel Inverter Based Shunt Active Filter for PV Generation: A Case Study","authors":"Nabil Karania;Mohamad Alaaeddin Alali;Stefano Di Gennaro;Jean–Pierre Barbot","doi":"10.1109/OJIA.2025.3563851","DOIUrl":"https://doi.org/10.1109/OJIA.2025.3563851","url":null,"abstract":"This article presents a compact structure ofshunt active photovoltaic filter based on a cascaded H-bridge multilevel inverter (SAF-PV/CHB-MLI) to eliminate electrical perturbations caused by nonlinear loads and to generate MPPT of PV generators. The SAF-PV/CHB-MLI structure, while injecting the maximum current of PV generators, opts to increase the apparent switching frequency, reduces the coupling/output filter size, improves grid-side power quality, generates sinusoidal-like output stepping voltage, and minimizes voltage stresses on IGBTs devices. To achieve these objectives, the SAF-PV/CHB-MLI structure is configured for an HB module per phase/cluster, combined with an appropriate common control strategy for both active filtering and PV generation. The <inline-formula><tex-math>$p - q$</tex-math></inline-formula> current identification algorithm is adapted/modified to include a P&O algorithm for MPPT detection and a developed PLL to ensure reliable operation under grid distortion conditions. The common control strategy comprises three complementary control loops: the injected current controller for perturbation compensation and maximum PV current injection, the individual cluster voltage balancing controller, and the overall dc voltage regulator which is incorporated within the adapted/modified <italic>p</i>-<italic>q</i> algorithm. Then, a multicarriers phase-shifted pulsewidth modulation is adopted to ensure the required individual and apparent switching frequencies, while reducing the sideband harmonic components’ impact. A tradeoff among the HB modules number, IGBTs rating, individual and apparent switching frequencies, and the accumulative output voltage is elaborated to create reliable and economical structure that meets industrial application recommendations. To validate the proposed structure's performance, a case study is conducted for textile industrial factory suffering from harmonic impact on its main sensitive load (SL) textile machine of almost 50 kVA; site measurements using power-quality analyzer devices are collected. A numerical model of the factory's network was developed to investigate the proposed structure performance on SL.","PeriodicalId":100629,"journal":{"name":"IEEE Open Journal of Industry Applications","volume":"6 ","pages":"262-280"},"PeriodicalIF":7.9,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10975133","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144090730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-04-22DOI: 10.1109/OJIA.2025.3562702
Erika Stracqualursi;Rodolfo Araneo;Massimo Mitolo
Grounding systems play a critical role in ensuring the safety and reliability of power systems, particularly in substations, where public access poses a significant risk. This article presents a computational study of grounding configurations for substation fences, based on guidelines from the IEEE Std 80-2000. A specialized code was developed and tested to simulate various grounding scenarios, including cases where the fence is connected to or isolated from the substation's grounding grid. The study examines key parameters, such as touch and surface potentials under fault conditions. Prospective and simulation results on five distinct fence grounding setups are presented. The article highlights the effectiveness of the developed code in accurately predicting hazardous conditions, providing valuable insights for optimizing substation grounding designs.
{"title":"Analysis of Transferred Potentials on Substation Fences","authors":"Erika Stracqualursi;Rodolfo Araneo;Massimo Mitolo","doi":"10.1109/OJIA.2025.3562702","DOIUrl":"https://doi.org/10.1109/OJIA.2025.3562702","url":null,"abstract":"Grounding systems play a critical role in ensuring the safety and reliability of power systems, particularly in substations, where public access poses a significant risk. This article presents a computational study of grounding configurations for substation fences, based on guidelines from the IEEE Std 80-2000. A specialized code was developed and tested to simulate various grounding scenarios, including cases where the fence is connected to or isolated from the substation's grounding grid. The study examines key parameters, such as touch and surface potentials under fault conditions. Prospective and simulation results on five distinct fence grounding setups are presented. The article highlights the effectiveness of the developed code in accurately predicting hazardous conditions, providing valuable insights for optimizing substation grounding designs.","PeriodicalId":100629,"journal":{"name":"IEEE Open Journal of Industry Applications","volume":"6 ","pages":"307-315"},"PeriodicalIF":7.9,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10974581","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144171053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-04-22DOI: 10.1109/OJIA.2025.3563502
Andrei Tregubov;Petros Karamanakos;Ludovico Ortombina
Long-horizon finite control set model predictive control (FCS-MPC) is known for its superior performance, particularly when applied to complex, higher order systems, such as grid-connected converters with $LCL$ filters. This article proposes a long-horizon FCS-MPC method that effectively operates such systems even in the presence of time-varying model parameters and distorted grid voltage with variable harmonic content. To do so, the proposed method incorporates information about the grid voltage distortion when generating the reference trajectories of the controlled variables, namely, the grid and converter currents and the filter capacitor voltage. In addition, a fast estimation algorithm continuously updates the grid- and converter-side reactances, thus ensuring robustness to parameter variations in the system model. Real-time tests conducted in a hardware-in-the-loop environment validate the effectiveness of the proposed control approach across various operating conditions.
{"title":"Long-Horizon Direct Model Predictive Control for Medium-Voltage Converters Connected to a Distorted Grid","authors":"Andrei Tregubov;Petros Karamanakos;Ludovico Ortombina","doi":"10.1109/OJIA.2025.3563502","DOIUrl":"https://doi.org/10.1109/OJIA.2025.3563502","url":null,"abstract":"Long-horizon finite control set model predictive control (FCS-MPC) is known for its superior performance, particularly when applied to complex, higher order systems, such as grid-connected converters with <inline-formula><tex-math>$LCL$</tex-math></inline-formula> filters. This article proposes a long-horizon FCS-MPC method that effectively operates such systems even in the presence of time-varying model parameters and distorted grid voltage with variable harmonic content. To do so, the proposed method incorporates information about the grid voltage distortion when generating the reference trajectories of the controlled variables, namely, the grid and converter currents and the filter capacitor voltage. In addition, a fast estimation algorithm continuously updates the grid- and converter-side reactances, thus ensuring robustness to parameter variations in the system model. Real-time tests conducted in a hardware-in-the-loop environment validate the effectiveness of the proposed control approach across various operating conditions.","PeriodicalId":100629,"journal":{"name":"IEEE Open Journal of Industry Applications","volume":"6 ","pages":"191-205"},"PeriodicalIF":7.9,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10974479","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143925028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-04-21DOI: 10.1109/OJIA.2025.3562844
Yinan Li;Song Hu;Chuan Sun;Peiwen Li;Wanlin Nie;Huiqing Wen;Akshay Rathore;Xiaodong Li
To improve the operation efficiency under various conversion gains, a series resonant dc–dc converter is proposed in this article for renewable power generation application, which adopts a dual-transformer structure and employs an asymmetrical modulation scheme. First, the operation principle of the converter and the modulation scheme is analyzed. As a result, the steady-state characteristics expressions are solved, including the resonant tank current and transmission power. To reduce the high-frequency switching loss, the additional parameter of dual-transformer structure, which is defined as the ratio of two high-frequency transformers, can be tuned to widen zero-voltage switching (ZVS) range on both sides. Furthermore, Lagrange multiplier method is applied to minimize the root mean square (rms) current to reduce the conduction loss. With full ZVS range operation and minimized rms current, the overall efficiency of the proposed converter can be enhanced. Finally, the performance of the proposed converter with the adopted control scheme is evaluated with the experimental results on a 400 W lab prototype converter.
{"title":"A Dual-Transformer Series Resonant Converter With Wide ZVS Range and Minimized RMS Current Operation","authors":"Yinan Li;Song Hu;Chuan Sun;Peiwen Li;Wanlin Nie;Huiqing Wen;Akshay Rathore;Xiaodong Li","doi":"10.1109/OJIA.2025.3562844","DOIUrl":"https://doi.org/10.1109/OJIA.2025.3562844","url":null,"abstract":"To improve the operation efficiency under various conversion gains, a series resonant dc–dc converter is proposed in this article for renewable power generation application, which adopts a dual-transformer structure and employs an asymmetrical modulation scheme. First, the operation principle of the converter and the modulation scheme is analyzed. As a result, the steady-state characteristics expressions are solved, including the resonant tank current and transmission power. To reduce the high-frequency switching loss, the additional parameter of dual-transformer structure, which is defined as the ratio of two high-frequency transformers, can be tuned to widen zero-voltage switching (ZVS) range on both sides. Furthermore, Lagrange multiplier method is applied to minimize the root mean square (rms) current to reduce the conduction loss. With full ZVS range operation and minimized rms current, the overall efficiency of the proposed converter can be enhanced. Finally, the performance of the proposed converter with the adopted control scheme is evaluated with the experimental results on a 400 W lab prototype converter.","PeriodicalId":100629,"journal":{"name":"IEEE Open Journal of Industry Applications","volume":"6 ","pages":"281-294"},"PeriodicalIF":7.9,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10971908","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-04-21DOI: 10.1109/OJIA.2025.3562868
Ji-Chang Son;Min-Su Kwon;Dong-Kuk Lim
Optimal design of a traction motor is a complex process, as various requirements and constraints need to be satisfied. In addition, consideration of various physical aspects, such as stress and heat, is necessary to ensure the stability of the motor, including mechanical rigidity and insulation breakdown. In this article, to derive the optimal design of an interior permanent magnet synchronous motor (IPMSM), a novel sequential design process consisting of conceptual design, detailed design, and optimal design is proposed. The conceptual design enables the rapid execution of multiple case studies, as static electromagnetic analysis is used. The overall geometric parameters are determined through electromagnetic analysis in the detailed design stage and an initial model that satisfies the requirements is derived. Finally, in the optimal design stage, the optimal model is quickly derived using a machine learning method, and the stability of the model is examined through multiphysics analysis. To validate the applicability to the practical motor, design optimization for a 350-kW class dual three-phase IPMSM for a wheeled armored vehicle is conducted, and the feasibility of the proposed method is verified based on the experimental results of the manufactured prototype.
{"title":"Sequential Design Process of a 350-kW Class Dual Three-Phase IPMSM for a Wheeled Armored Vehicle","authors":"Ji-Chang Son;Min-Su Kwon;Dong-Kuk Lim","doi":"10.1109/OJIA.2025.3562868","DOIUrl":"https://doi.org/10.1109/OJIA.2025.3562868","url":null,"abstract":"Optimal design of a traction motor is a complex process, as various requirements and constraints need to be satisfied. In addition, consideration of various physical aspects, such as stress and heat, is necessary to ensure the stability of the motor, including mechanical rigidity and insulation breakdown. In this article, to derive the optimal design of an interior permanent magnet synchronous motor (IPMSM), a novel sequential design process consisting of conceptual design, detailed design, and optimal design is proposed. The conceptual design enables the rapid execution of multiple case studies, as static electromagnetic analysis is used. The overall geometric parameters are determined through electromagnetic analysis in the detailed design stage and an initial model that satisfies the requirements is derived. Finally, in the optimal design stage, the optimal model is quickly derived using a machine learning method, and the stability of the model is examined through multiphysics analysis. To validate the applicability to the practical motor, design optimization for a 350-kW class dual three-phase IPMSM for a wheeled armored vehicle is conducted, and the feasibility of the proposed method is verified based on the experimental results of the manufactured prototype.","PeriodicalId":100629,"journal":{"name":"IEEE Open Journal of Industry Applications","volume":"6 ","pages":"237-248"},"PeriodicalIF":7.9,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10971876","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-28DOI: 10.1109/OJIA.2025.3555529
Md Samiullah;Mohammed Al-Hitmi;Ali T. Al Awami;Shirazul Islam;Atif Iqbal
DC–DC converters hold immense importance due to their diverse applications, making it critical to design them in accordance with the demanding operational requirements. Conventional boost converters face significant challenges at high voltage levels, requiring excessively high duty cycles that lead to increased component stress, switching transients and losses, electromagnetic interference (EMI), and diode reverse recovery issues. This article presents the design of a new voltage scaling converter with applications in high-voltage scenarios, such as the integration of solar photovoltaic (PV) systems into a high-voltage dc bus within a microgrid. The proposed converter features an extendable design and flexible control, enabled by the incorporation of dual duty cycles, allowing for a broader range of operational flexibility. The converter simultaneously achieves high voltage gain, reduced component stress, continuous input current, high power density, and a wide range of feasible duty ratios. The utilization of multiple passive elements is analytically verified by studying variations in parameters, such as the presence of inductors with different values. Finally, the converter's performance is validated through experiments conducted on a 600 W prototype operating at a frequency of 50 kHz. In addition, the closed-loop operation of the converter is validated by its ability to maintain a regulated 400 V dc bus voltage, despite variations in the input voltage.
{"title":"Wide Range Voltage Scaling Converter With Extended Duty and Low Voltage Stress for a DC Microgrid Applications","authors":"Md Samiullah;Mohammed Al-Hitmi;Ali T. Al Awami;Shirazul Islam;Atif Iqbal","doi":"10.1109/OJIA.2025.3555529","DOIUrl":"https://doi.org/10.1109/OJIA.2025.3555529","url":null,"abstract":"DC–DC converters hold immense importance due to their diverse applications, making it critical to design them in accordance with the demanding operational requirements. Conventional boost converters face significant challenges at high voltage levels, requiring excessively high duty cycles that lead to increased component stress, switching transients and losses, electromagnetic interference (EMI), and diode reverse recovery issues. This article presents the design of a new voltage scaling converter with applications in high-voltage scenarios, such as the integration of solar photovoltaic (PV) systems into a high-voltage dc bus within a microgrid. The proposed converter features an extendable design and flexible control, enabled by the incorporation of dual duty cycles, allowing for a broader range of operational flexibility. The converter simultaneously achieves high voltage gain, reduced component stress, continuous input current, high power density, and a wide range of feasible duty ratios. The utilization of multiple passive elements is analytically verified by studying variations in parameters, such as the presence of inductors with different values. Finally, the converter's performance is validated through experiments conducted on a 600 W prototype operating at a frequency of 50 kHz. In addition, the closed-loop operation of the converter is validated by its ability to maintain a regulated 400 V dc bus voltage, despite variations in the input voltage.","PeriodicalId":100629,"journal":{"name":"IEEE Open Journal of Industry Applications","volume":"6 ","pages":"162-177"},"PeriodicalIF":7.9,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10944579","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-25DOI: 10.1109/OJIA.2025.3554485
Usman Ali Khan;Ashraf Ali Khan;Jung-Wook Park
This article presents a simple high-frequency transformer (HFT) isolated buck–boost inverter designed for single-phase applications. The proposed HFT isolated inverter, with its full-bridge buck–boost topology, provides a wider voltage regulation range. It can efficiently step up or step down the input voltage to achieve the desired output ac voltage. It provides galvanic isolation between the input and output sides. This feature ensures safety and compatibility with applications that require isolation, such as renewable energy systems and electric vehicle charging. It utilizes a solitary output inductor, an HFT for isolation, and ensures that only one switch is switching at a high frequency at a time. This novel inverter design obviates the requirements for a 50/60 Hz low-frequency transformer, consequently enhancing the power density. To validate the theoretical findings, an experimental prototype of the proposed inverter with output voltage ac voltage of peak 155.5 V, line frequency 60 Hz, and an output power of 0.5 kW is implemented. Extensive experimental tests are conducted under various operating conditions. The experimental results validate the theoretical analysis and confirm the practical viability and effectiveness of the proposed topology.
{"title":"Single-Stage Single-Phase Isolated Full-Bridge Buck–Boost DC–AC Inverters","authors":"Usman Ali Khan;Ashraf Ali Khan;Jung-Wook Park","doi":"10.1109/OJIA.2025.3554485","DOIUrl":"https://doi.org/10.1109/OJIA.2025.3554485","url":null,"abstract":"This article presents a simple high-frequency transformer (HFT) isolated buck–boost inverter designed for single-phase applications. The proposed HFT isolated inverter, with its full-bridge buck–boost topology, provides a wider voltage regulation range. It can efficiently step up or step down the input voltage to achieve the desired output ac voltage. It provides galvanic isolation between the input and output sides. This feature ensures safety and compatibility with applications that require isolation, such as renewable energy systems and electric vehicle charging. It utilizes a solitary output inductor, an HFT for isolation, and ensures that only one switch is switching at a high frequency at a time. This novel inverter design obviates the requirements for a 50/60 Hz low-frequency transformer, consequently enhancing the power density. To validate the theoretical findings, an experimental prototype of the proposed inverter with output voltage ac voltage of peak 155.5 V, line frequency 60 Hz, and an output power of 0.5 kW is implemented. Extensive experimental tests are conducted under various operating conditions. The experimental results validate the theoretical analysis and confirm the practical viability and effectiveness of the proposed topology.","PeriodicalId":100629,"journal":{"name":"IEEE Open Journal of Industry Applications","volume":"6 ","pages":"148-161"},"PeriodicalIF":7.9,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10938598","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143801011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-21DOI: 10.1109/OJIA.2025.3569595
Yifei Cai;Fares S. EL-Faouri;Akira Chiba;Souichiro Yoshizaki
Magnetostriction and electromagnetic force are the two electromagnetic sources of motor vibration. Understanding the phases of the vibrations caused by these two factors is crucial for determining whether they interact to amplify or mitigate total vibration. This study focuses on the experimental investigation of the phase behaviors of these two types of vibrations. A frequency-dependent phase delay between magnetostrictive strain and flux density is observed when measuring the magnetostriction curves of three core materials. However, similar phase delay cannot be confirmed between the magnetostrictive vibration and flux density in three stator cores. Instead, the magnetostrictive vibration is found to be in phase with the flux density even under high-frequency excitations. In addition, the vibration caused by electromagnetic force is measured in a switched reluctance motor, which also demonstrates an anti-phase relationship with the flux density. These experimental findings provide fundamental insights into magnetostrictive vibration, which will guide further research on motor vibration considering magnetostriction effect.
{"title":"An Experimental Study on Phases of Vibrations Caused by Magnetostriction and Electromagnetic Force","authors":"Yifei Cai;Fares S. EL-Faouri;Akira Chiba;Souichiro Yoshizaki","doi":"10.1109/OJIA.2025.3569595","DOIUrl":"https://doi.org/10.1109/OJIA.2025.3569595","url":null,"abstract":"Magnetostriction and electromagnetic force are the two electromagnetic sources of motor vibration. Understanding the phases of the vibrations caused by these two factors is crucial for determining whether they interact to amplify or mitigate total vibration. This study focuses on the experimental investigation of the phase behaviors of these two types of vibrations. A frequency-dependent phase delay between magnetostrictive strain and flux density is observed when measuring the magnetostriction curves of three core materials. However, similar phase delay cannot be confirmed between the magnetostrictive vibration and flux density in three stator cores. Instead, the magnetostrictive vibration is found to be in phase with the flux density even under high-frequency excitations. In addition, the vibration caused by electromagnetic force is measured in a switched reluctance motor, which also demonstrates an anti-phase relationship with the flux density. These experimental findings provide fundamental insights into magnetostrictive vibration, which will guide further research on motor vibration considering magnetostriction effect.","PeriodicalId":100629,"journal":{"name":"IEEE Open Journal of Industry Applications","volume":"6 ","pages":"316-324"},"PeriodicalIF":7.9,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11008624","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144170871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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