IEEE Journal of Emerging and Selected Topics in Power Electronics最新文献

{"title":"Dynamic Sector Partitioning-Based Torque Ripple Suppression Strategy for Switched Reluctance Motors Using Lyapunov Stability Criterion","authors":"Wenju Yan;Bin Ouyang;Jun Xin;Hao Chen;Nikolay Korovkin;Sakhno Liudmila;Popov Stanislav Olegovich;Bodrenkov Evgenii Alexandrovich","doi":"10.1109/JESTPE.2026.3679660","DOIUrl":"10.1109/JESTPE.2026.3679660","url":null,"abstract":"Fixed-sector model predictive control (FS-MPC) strategies suffer from rigid sector boundaries and the lack of a rigorous mathematical foundation for candidate voltage vector selection. To address these limitations, this article proposes a dynamic sector partitioning strategy for switched reluctance motors (SRMs) based on the Lyapunov stability criterion. According to rotor position and interphase torque characteristics, the motor operating region is dynamically divided into four sub-regions, providing a theoretical basis for selecting the optimal predictive voltage vector. Combined with model predictive torque control (MPTC), accurate tracking of the reference torque is achieved. Simulation and experimental results verify the effectiveness of the proposed method. The results demonstrate that, compared with conventional FS-MPC, Lyapunov stability criterion-based dynamic sector model predictive control (LDS-MPC) significantly suppresses torque ripple under various experimental operating conditions. In particular, at the rated speed, the torque ripple is reduced by 50.87% under heavy-load conditions and by 52.32% under light-load conditions. This strategy effectively resolves the performance deterioration of traditional methods under high-load conditions, achieving low torque ripple control across a wide operating range.","PeriodicalId":13093,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Power Electronics","volume":"14 5","pages":"6197-6209"},"PeriodicalIF":5.7,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147586475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modulated Model Predictive Control for Modular Multilevel Matrix Converter With Enhanced Steady-State Performance","authors":"Zheng Gong;Ziyang Meng;Lianchang Zhang;Xiaojie Wu","doi":"10.1109/JESTPE.2026.3686317","DOIUrl":"10.1109/JESTPE.2026.3686317","url":null,"abstract":"Modular multilevel matrix converter (M3C) is a direct AC/AC frequency conversion technology, which exhibits the characteristics of modularity, scalability, and redundancy. Conventional finite control set model predictive control (FCS-MPC) applies only a single switching state per control period, resulting in a variable switching frequency and significant current tracking errors. In this article, a modulated model predictive control (M2PC) strategy is proposed, which fixes the switching frequency through modulation technology and reduces the tracking errors in branch currents by operating double switching states. Thus, the steady-state performance of the system is enhanced with the superior dynamic-state performance of the conventional FCS-MPC reserved. In addition, aiming at the inherent computational delay of the digital controller, a two-step forward prediction delay compensation scheme for the proposed M2PC is employed. Finally, the feasibility and effectiveness of the proposed method are verified by simulations and experimental results.","PeriodicalId":13093,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Power Electronics","volume":"14 5","pages":"6221-6232"},"PeriodicalIF":5.7,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147735668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Moisture-Accelerated Gate-Oxide Failure in 1200-V SiC MOSFETs Under Repetitive Avalanche Stress","authors":"Yifan Song;Ao Zhang;Kun Ma;Yameng Sun;Xun Liu;Zhaofu Zhang;Yang Zhou;Sheng Liu","doi":"10.1109/JESTPE.2026.3701503","DOIUrl":"10.1109/JESTPE.2026.3701503","url":null,"abstract":"Silicon carbide (SiC) MOSFETs are increasingly adopted in high-efficiency power systems where avalanche events are prevalent. However, the coupled impact of environmental humidity and repetitive avalanche stress is not well understood, which complicates reliability assessment under realistic mission profiles. In this work, the repetitive-avalanche characteristic lifetime to catastrophic gate-oxide breakdown is found to decrease markedly with humidity, even though the single-pulse avalanche ruggedness remains comparable at 25% RH and 85% RH; within the investigated range, the characteristic lifetime is reduced by about 15.7% for every 10% increase in RH. To clarify the underlying degradation process, fixed- and step-change-humidity unclamped inductive switching (UIS) experiments are combined with interrupted-device emission microscopy (EMMI), failure analysis, TCAD simulation, and capacitance–voltage (<inline-formula> <tex-math>$C_{G}$ </tex-math></inline-formula>–<inline-formula> <tex-math>$V_{G}$ </tex-math></inline-formula>) characterization. The results support a two-stage degradation scenario in which a localized precursor gate-leakage path first forms under repetitive avalanche with only weak humidity dependence, whereas the subsequent charge buildup and propagation to final breakdown are strongly accelerated by humidity. Based on these findings, a semi-empirical lifetime model is established to support humidity-aware repetitive-avalanche reliability assessment of the investigated 1200-V planar-gate SiC MOSFET platform.","PeriodicalId":13093,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Power Electronics","volume":"14 5","pages":"6068-6079"},"PeriodicalIF":5.7,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148289248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design and Analysis of a Three-Port Bidirectional DC--DC Converter With Low-Voltage Stress and Flexible Power Flow Control for DC Microgrid Applications","authors":"Sunil Mandal;Prajof Prabhakaran","doi":"10.1109/JESTPE.2026.3698587","DOIUrl":"10.1109/JESTPE.2026.3698587","url":null,"abstract":"Nonisolated bidirectional DC–DC converters (BDCs) are widely used for power flow management in energy storage systems, DC microgrids (DC-MGs), and electric vehicles (EVs); however, many existing topologies suffer from limited voltage gain, narrow duty-cycle range, high component count, bulky structure, and high-voltage stress on power devices. To overcome these limitations, this article proposes a nonisolated three-port high-gain BDC for the integration of renewable energy sources (RESs), energy storage units (ESUs), and DC-MGs. The proposed converter supports multiple power flow paths, including battery-to-DC-MG, photovoltaics (PVs)-to-DC-MG, and DC-MG-to-battery operation. It operates in boost mode for power transfer from Port-A to Port-B and in buck mode for reverse power flow. A wide voltage conversion ratio with reduced voltage stress across most switches is achieved, improving efficiency and reliability. A 200-W SiC MOSFET-based prototype was developed and experimentally validated. The converter achieves a peak efficiency of 96% and exhibits stable operation under both open-loop and closed-loop control. Moreover, operation in both continuous conduction mode (CCM) and discontinuous conduction mode (DCM) demonstrates the flexibility and robustness of the proposed topology across a wide operating range.","PeriodicalId":13093,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Power Electronics","volume":"14 5","pages":"5985-5997"},"PeriodicalIF":5.7,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148290655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Natural Continuity of States Seamless Switching Control for Grid-Connected Inverters","authors":"Rui Zhao;Xiaofeng Yang;Ange Wei;Menghan Lv;Trillion Q. Zheng","doi":"10.1109/JESTPE.2026.3711760","DOIUrl":"10.1109/JESTPE.2026.3711760","url":null,"abstract":"Seamless switching control between grid-following (GFL) and grid-forming (GFM) modes is a critical solution for addressing the stability challenges of grid-connected inverters (GCIs) under a wide range of grid strength fluctuations. However, the essence of traditional methods is a constrained switching system that artificially forces the discontinuous states to be continuous through additional control, such as synchronization links. As a result, the traditional methods suffer from the issue of real-mode switching lagging behind the switching command, which is referred to as pseudoswitching in this article. If the grid strengths fluctuate into the unstable region, the instability risks of GCIs with pseudoswitching will increase. Another nonnegligible issue is that the control structure and logic of the existing methods are complex, which limits their engineering applicability. To address the above issues, a natural continuity of states seamless switching control (NC-SSC) strategy is proposed. The NC-SSC designs a scheme of phase switching point advancement and integrator sharing, which ensures the continuity of phase at the switching time without relying on extra synchronization mechanisms. Then, a modal transition adaptive PI (MT-API) controller is proposed, which ingeniously embeds the switching logic into the controller by the modal factor <inline-formula> <tex-math>$sigma $ </tex-math></inline-formula>. This approach achieves natural continuity of the reference current while significantly simplifying the operational logic. Moreover, NC-SSC eliminates the need for traditional amplitude synchronization through a dynamic <inline-formula> <tex-math>$d$ </tex-math></inline-formula>-axis grid voltage component assignment technique, further saving control resources. With these enhancements, the proposed NC-SSC breaks through the constraints of the traditional switching system, effectively resolving the issues of pseudoswitching and control complexity. Simulation and experimental results verify the correctness of the theoretical analysis and the superiority of the NC-SSC.","PeriodicalId":13093,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Power Electronics","volume":"14 5","pages":"6625-6638"},"PeriodicalIF":5.7,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148414904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"State-Space Modeling and Linearization of Radial DC Microgrids: A Method for Coupling DC--DC Converters State-Space Average Models","authors":"Guilherme Henrique Favaro Fuzato;Thales Augusto Fagundes;Cassius Rossi de Aguiar;Paulo Soares Filho;Tárcio André dos Santos Barros;Ricardo Quadros Machado","doi":"10.1109/JESTPE.2026.3719182","DOIUrl":"10.1109/JESTPE.2026.3719182","url":null,"abstract":"DC microgrids are composed of various nonlinear elements, including power converters (e.g., DC–DC and DC–AC/AC–DC converters for grid-connected operation), power sources (fuel cells, photovoltaics, and batteries), and controllers that may be linear or nonlinear. Accurately capturing the dynamic behavior of such systems requires developing a model that closely reflects the interactions among these nonlinear elements. These interactions influence the transient response, the steady-state operating points, and stability of the microgrid. In this context, this article presents a systematic modeling approach for radial DC microgrids based on the proposed DC-link Coupling Equation. This method enables systematic coupling of nonlinear average models of DC–DC converters with their associated linear or nonlinear controllers into a unified state-space representation. The methodology is applied to two case studies: one employing a droop controller and the other using a cascaded DC-link voltage controller. The nonlinear microgrid model accounts for interactions among all nonlinear elements and is validated through comparison of results from MATLAB ordinary differential equation (ODE) solver applied to the DC microgrid model and experimental data obtained from a hardware-based prototype. Finally, linearization of the nonlinear DC microgrid model is employed to assess the stability of the microgrid under varying load conditions.","PeriodicalId":13093,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Power Electronics","volume":"14 5","pages":"5720-5731"},"PeriodicalIF":5.7,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11635891","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148633686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-Precision In Situ Inductor Loss Evaluation for DC–DC Converters Based on Gain–Phase Frequency Characteristics Correction in Voltage/Current Measurement Systems","authors":"Takaaki Ibuchi;Tsuyoshi Funaki","doi":"10.1109/JESTPE.2026.3681269","DOIUrl":"10.1109/JESTPE.2026.3681269","url":null,"abstract":"Accurate in situ evaluation of inductor losses in operating DC–DC converters is hindered by frequency-dependent gain and phase errors in practical voltage and current probes, especially when the voltage–current phase approaches 90° in a low-loss inductor. This article presents a frequency-domain gain–phase correction method based on vector network analyzer (VNA) characterization of commercially available probes. The proposed approach is based on the same fundamental principle as the cross-power method and enables high-accuracy loss evaluation using general-purpose oscilloscopes and probe systems during actual converter operation. Gain–phase characteristics are measured for high-voltage differential probes, AC/DC current probes, and optically isolated probes. Applying the derived correction to harmonic components measured in a 100-kHz, 450-W boost converter reduces the discrepancy between different probe combinations from approximately 20 W to below 0.2 W. The results demonstrate that frequency-dependent correction is essential for reliable in situ magnetic loss evaluation using the standard measurement equipment.","PeriodicalId":13093,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Power Electronics","volume":"14 5","pages":"6459-6470"},"PeriodicalIF":5.7,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149091401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimal Multitimescale Model Predictive Control-Based Power Allocation of Hybrid Energy Storage Systems via Reference Curve Tracking","authors":"Weihao Zhang;Dongsheng Yu;Zhichao Zhang;Samson Shenglong Yu;Shing Chiang Tan;Chee Peng Lim","doi":"10.1109/JESTPE.2026.3689151","DOIUrl":"10.1109/JESTPE.2026.3689151","url":null,"abstract":"The intermittency of renewable energy has made stable power supply a focal and challenging research topic in today’s power system. However, most existing intelligence-enabled control protocols pose significant computational complexity, hindering their practical applications in multitimescale power control scenarios. This article proposes an optimal power allocation method for hybrid energy storage systems (HESSs) based on complementary power reference curves. The approach leverages batteries’ dynamic characteristics and output properties and algorithmic features to construct complementary power reference curves. Through real-time tracking of these reference curves, the method achieves coordinated and stable power output across multiple timescales. The improved model predictive control (MPC) is integrated into the control strategy to efficiently convert power tracking into current prediction. This approach enhances system dynamic response without needing excessive computational resources. Furthermore, the proposed method is integrated into a dynamic voltage restorer (DVR) for power quality control. Finally, the feasibility and effectiveness of the proposed approach is validated through hardware experiments.","PeriodicalId":13093,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Power Electronics","volume":"14 5","pages":"6501-6512"},"PeriodicalIF":5.7,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149091404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Virtual Synchronous Generator Stability Enhancement and Power Oscillation Suppression With Adaptive Virtual Impedance Control","authors":"Xiangqian Su;Xiangyang Xing;Xiangjun Li;Yan Li;Zhiyuan Meng;Jiadong Sun;Frede Blaabjerg","doi":"10.1109/JESTPE.2026.3689505","DOIUrl":"10.1109/JESTPE.2026.3689505","url":null,"abstract":"With the rapid growth of renewable power generation (RPG), grid inertia gradually decreases. Therefore, the virtual synchronous generator (VSG) is proposed to enhance the inertia and damping of the power system. High-penetration RPG, characterized by intermittency, stochasticity, and output volatility, could cause grid impedance variations, thereby leading to short-circuit ratio (SCR) fluctuations that are detrimental to system stability. When the grid reactance is much larger than its resistance, VSG is stable under weak grids while less stable under strong grids, so it is challenging for VSG to meet the stability criteria under a wide range of SCRs. Furthermore, power oscillation may occur during SCR fluctuations. Therefore, this article proposes an adaptive virtual impedance (AVI) control strategy which fully retains the characteristics of the grid-forming (GFM) mode, mitigates power oscillation during SCR fluctuations, and improves the stability of VSG under strong grids. First, a state-space model of the VSG is developed to analyze the control parameters. Then, an open-loop small-signal transfer function of the active power loop (APL) is derived to analyze the proposed strategy. Finally, an appropriate feedback coefficient is determined based on the developed model. Experimental results verify the effectiveness of the proposed strategy.","PeriodicalId":13093,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Power Electronics","volume":"14 5","pages":"6513-6530"},"PeriodicalIF":5.7,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149091409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sensorless Control of Dual-Three-Phase PMSM Using a Subspace Decoupling-Based Fuzzy Super-Twisting Sliding Mode Observer","authors":"Luhui Xu;Zhiguo Zhao;Peng Tang","doi":"10.1109/JESTPE.2026.3702105","DOIUrl":"10.1109/JESTPE.2026.3702105","url":null,"abstract":"To address the chattering, parameter sensitivity, and limited operating-condition adaptability of conventional sliding mode observers (SMOs) in sensorless control of dual-three-phase permanent magnet synchronous motors (DTP-PMSMs), this article proposes a subspace-decoupling-based integrated method combining a fuzzy super-twisting SMO (F-STSMO) and gray wolf optimization (GWO). In the proposed method, fuzzy control is integrated with the super-twisting SMO (STSMO) to construct a fuzzy time-varying-gain observer. The stability of the observer under time-varying disturbances is demonstrated, which effectively suppresses chattering and improves the observation performance over a wide dynamic range. By exploiting the multiple degrees of freedom of DTP-PMSMs, a GWO-based parameter estimation algorithm is developed. The sensitivity to initial settings and the convergence conditions are discussed, enabling high-accuracy real-time motor parameter estimation and enhancing the robustness of the STSMO against parameter variations. Furthermore, the Lyapunov stability constraints of the integrated F-STSMO and GWO method are analyzed. Experimental results show that the proposed integrated F-STSMO and GWO sensorless control method achieves a resistance estimation error of 0.9% for the DTP-PMSM, reduces the rotor position error caused by parameter variations by 88.6%, and keeps the rotor position error fluctuation within 2.51° under both steady-state and dynamic operating conditions.","PeriodicalId":13093,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Power Electronics","volume":"14 5","pages":"6331-6344"},"PeriodicalIF":5.7,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149092326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}