{"title":"An Accurate Equivalent Circuit based Analytical Model of Sustained Oscillation Analysis for GaN HEMT in Half-Bridge Circuits","authors":"Yanjie He, Zilong Chen, Yukun Zhang, Quangui Tang, Qinyuan Yang, Chong Dou, Qian Cui, Yuqi Wei","doi":"10.1109/jestpe.2026.3739574","DOIUrl":"https://doi.org/10.1109/jestpe.2026.3739574","url":null,"abstract":"","PeriodicalId":13093,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Power Electronics","volume":"10 1","pages":""},"PeriodicalIF":5.5,"publicationDate":"2026-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149086595","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}
Yangwei Zhou;Ziling Nie;Li Peng;Xudong Zou;Jun Sun;Lin Song;Huayu Li
{"title":"Quantitative Observability of PMSM Inductance Estimation: A Unified Multiscale Framework","authors":"Yangwei Zhou;Ziling Nie;Li Peng;Xudong Zou;Jun Sun;Lin Song;Huayu Li","doi":"10.1109/JESTPE.2026.3695100","DOIUrl":"https://doi.org/10.1109/JESTPE.2026.3695100","url":null,"abstract":"The convergence stability and accuracy of permanent magnet synchronous motor (PMSM) parameter estimation are fundamentally governed by model observability. While fundamental-frequency approaches are established, the theoretical observability of emerging models relying on high-frequency current-derivative information remains largely unexplored. This article proposes a real-time quantitative framework for evaluating the observability of PMSM parameter-estimation basis models within a unified multiscale perspective. The proposed method introduces a condition-number-based metric derived from the information matrix, enabling real-time assessment of model excitation and conditioning. Most existing parameter-estimation methods are summarized into three basis models: the fundamental-frequency time-scale model (FFTM), the switching-time-scale full model (STFM), and the virtual-voltage-vector model (VVVM). These models are comparatively analyzed within this framework. Analytical results reveal the excitation-dependent conditioning characteristics of each model and identify their weakly observable conditions. An adaptive observer guided by the proposed metric is utilized specifically to demonstrate the effectiveness of the observability assessment. Both numerical and experimental results confirm that the proposed criterion provides a reliable and real-time index for model observability evaluation and parameter-identification stability.","PeriodicalId":13093,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Power Electronics","volume":"14 5","pages":"6304-6318"},"PeriodicalIF":5.7,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149097511","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}
Yifan Zhang;Jianwei Lv;Yiyang Yan;Shuangxi Zhu;Wenzhe Xu;Jiaxin Liu;Xinmin Liu;Cai Chen;Yong Kang
{"title":"A Low-Parasitic Integrated CM EMI Filter Structure With Additional Terminals for SiC Power Modules: Analysis, Design, and Experimental Validation","authors":"Yifan Zhang;Jianwei Lv;Yiyang Yan;Shuangxi Zhu;Wenzhe Xu;Jiaxin Liu;Xinmin Liu;Cai Chen;Yong Kang","doi":"10.1109/JESTPE.2026.3697540","DOIUrl":"https://doi.org/10.1109/JESTPE.2026.3697540","url":null,"abstract":"Silicon carbide (SiC) devices operate at higher switching speeds and frequencies than traditional silicon (Si) devices, and also generate more significant common-mode (CM) electromagnetic interference (EMI). Integrated EMI filters within the power module offer better performance than external filters above 10 MHz. But the existing integrated design still suffers from insufficient filtering performance below 10 MHz and high core losses in the CM inductors due to the parasitic inductances and terminal placement. To address these problems, this article presents a novel integrated EMI filter structure within the SiC power module. Featuring a low-leakage stripline inductor and additional terminals, it enhances EMI suppression over a wider frequency range and effectively reduces the core losses. A frequency-domain analysis model is developed to analyze the impact of key parasitic parameters from 150 kHz to 30 MHz, addressing gaps in current theoretical analysis. Based on this, the proposed EMI filter structure is introduced. A power module prototype employing this structure is fabricated, and an EMI test bench is constructed. Experimental results from 150 kHz to 30 MHz demonstrate that the proposed structure achieves superior filtering performance to the existing structure, and also achieves a 10 dB improvement compared to the external filters.","PeriodicalId":13093,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Power Electronics","volume":"14 5","pages":"6043-6055"},"PeriodicalIF":5.7,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149097522","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":"Advanced Inverter Control Method Using Adaptive Cascaded Delayed Signal Cancellation PLL","authors":"Guanhong Song;Sicheng Wu;Chunpu Wu;Qingnian Wang;Zhan Shu;Yongkang Xiong","doi":"10.1109/JESTPE.2026.3695229","DOIUrl":"https://doi.org/10.1109/JESTPE.2026.3695229","url":null,"abstract":"With increasing penetration of three-/single-phase inverters in distribution networks, nonideal grid conditions with unbalanced voltages, and background harmonics have become major problems that have severe impacts on the stable operation of grid-connected inverters. In recent literature, much research has focused on the phase-locked loop (PLL) algorithms for accurate phase angle synchronization. Even though various PLL methods have been studied, the tradeoffs between filtering capabilities and phase delay performance, as well as their negative impedance characteristic, have degraded the overall performance when integrating into inverter applications. Therefore, an improved adaptive cascaded delayed signal cancellation (CDSC) PLL method with threshold-triggered selective activation and adaptive delay compensation strategies is proposed in this article. The effectiveness of the proposed control method is verified through mathematical analysis and experimental comparison on an inverter prototype. However, the results have shown that the proposed method can provide accurate phase angle estimation with phase delay compensation and impedance characteristics enhancement for grid-connected inverters operating in nonideal grid conditions.","PeriodicalId":13093,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Power Electronics","volume":"14 5","pages":"6555-6566"},"PeriodicalIF":5.7,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149097810","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}
Gerald Brakoh;Ashraf Ali Khan;John E. Quaicoe;Hafiz Furqan Ahmed
{"title":"A Single-Phase Integrated Onboard Charger for Plug-In Dual-Motor EVs","authors":"Gerald Brakoh;Ashraf Ali Khan;John E. Quaicoe;Hafiz Furqan Ahmed","doi":"10.1109/JESTPE.2026.3688075","DOIUrl":"10.1109/JESTPE.2026.3688075","url":null,"abstract":"This article presents a simple integrated onboard charger (OBC) for electric vehicles (EVs) with a two-motor propulsion system, especially used in all-wheel drive (AWD). In order to ensure seamless integration of the charging system, the proposed charger does not use any additional components but reuses the two three-phase inverters that drive the two distinct permanent magnet synchronous motors (PMSMs) to charge the EV battery. The first inverter is reconfigured into an active rectifier that ensures a unity power factor is drawn from the grid, and a stable DC-link voltage is obtained. The second inverter is reconfigured into a DC–DC converter to control the output voltage and current for charging the battery. There are no additional elements present; hence, this innovation not only reduces the cost of EVs but also reduces the overall weight. The charger utilizes the motor windings as grid harmonic filters that ensure a total harmonic distortion (THD) below 5%. A simple proportional–integral (PI) and proportional–resonant (PR) control is implemented to achieve these objectives. Furthermore, the motors do not generate torque while charging, making it a suitable solution for AWD EVs. Simulation and experimental results are provided for a 1-kW prototype to evaluate the performance of the proposed charger using a 110-Vrms, 60-Hz supply with an output voltage of 48 V.","PeriodicalId":13093,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Power Electronics","volume":"14 5","pages":"5959-5973"},"PeriodicalIF":5.7,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147752637","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}
Jiaxiang Li;Yan Yan;Jian Wang;Xuefeng Jin;Hao Chen;Tingna Shi
{"title":"An Accurate Full-Speed-Range Control Strategy for PMSM With Improved Virtual Signal Injection MTPA and Smooth Field-Weakening Transition","authors":"Jiaxiang Li;Yan Yan;Jian Wang;Xuefeng Jin;Hao Chen;Tingna Shi","doi":"10.1109/JESTPE.2026.3663394","DOIUrl":"10.1109/JESTPE.2026.3663394","url":null,"abstract":"To improve the control accuracy of maximum torque per ampere (MTPA) in the constant torque region and enhance the control performance in the field-weakening region for permanent magnet synchronous motors (PMSMs), this article proposes a high-performance full-speed-range control strategy that integrates an improved virtual-signal-injection-based MTPA (VSIC-MTPA) approach with seamless field-weakening transition control. In the constant torque region, the torque model employed by VSIC-MTPA is analytically refined by accounting for the effects of injected virtual signals and inverter nonlinear voltage drops. This analysis identifies key error terms in the original model, which are subsequently compensated to improve torque modeling accuracy and thereby enhance MTPA control precision. Furthermore, a novel switching mechanism and region-transition criterion are developed to enable smooth and rapid transitions between the constant torque and field-weakening regions. The proposed design also reduces the current ripple during steady-state operation in the field-weakening region. The experimental results under various operating conditions validate the effectiveness and superior performance of the proposed method.","PeriodicalId":13093,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Power Electronics","volume":"14 5","pages":"6119-6132"},"PeriodicalIF":5.7,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146161303","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":"Structure-Reconfigurable LLC Resonant Converter Using Pulse-Frequency and Phase Shift Modulations for Wide Voltage Range Applications","authors":"Tae-Seok Kang;Hyun-Jin Jin;Yeong-Jun Choi","doi":"10.1109/JESTPE.2026.3674611","DOIUrl":"10.1109/JESTPE.2026.3674611","url":null,"abstract":"This article proposes a structure-reconfigurable LLC resonant converter employing pulse-frequency modulation (PFM) and phase shift modulation (PSM) for high-efficiency operation under a wide output voltage range. The proposed converter operates in three modes, namely primary-bridges phase-shift (PBP), synchronous rectifier frequency-variable (SRF), and primary/secondary phase-shift (PSP) modes. PSM is used in the PBP and PSP modes, while PFM is applied in the SRF mode. Additionally, there is no switching frequency difference during mode transitions, allowing for smooth transitions. By appropriately transitioning between operating modes, the proposed converter achieves a wide output voltage range while guaranteeing high efficiency near the resonant frequency. Additionally, conduction losses are reduced through structural reconfiguration by paralleling the primary-side bridges and adding switches on the secondary-side. Finally, a 1.2 kW prototype is constructed to validate the proposed converter. The verification results show that soft switching is maintained over the entire operating range, and an output voltage range of 135–600 V is achieved with a maximum efficiency of 97.4%.","PeriodicalId":13093,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Power Electronics","volume":"14 5","pages":"5551-5564"},"PeriodicalIF":5.7,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147470996","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}
Xiaochen Wu;Zeng Liu;Wenchen Wang;Yidong Shi;Jiarui Li;Jinjun Liu
{"title":"A High-Frequency Small-AC-Signal Injection-Based Decentralized Secondary Frequency Control Method for Islanded Low-Voltage AC Microgrids With Background Harmonics","authors":"Xiaochen Wu;Zeng Liu;Wenchen Wang;Yidong Shi;Jiarui Li;Jinjun Liu","doi":"10.1109/JESTPE.2026.3670029","DOIUrl":"10.1109/JESTPE.2026.3670029","url":null,"abstract":"Small-AC-signal (SACS) injection-based secondary frequency control (SFC) method demonstrates superior performance in restoring frequency and maintaining power sharing without communication in islanded AC microgrids. However, a major issue with the existing method is that the frequency of injected SACS often overlaps with that of preexisting background harmonic, leading to oscillations in both fundamental frequency and output power. To solve the problem, this article proposes a high-frequency SACS (HF-SACS) injection-based method. Unlike the existing method that limits SACS to a low frequency range, a HF-SACS lying beyond the preexisting background harmonics can be selected by using the proposed injection-and-detection (I&D) circuit. Moreover, to maintain reactive power sharing, a novel HF-SACS synchronization mechanism is also constructed by extending the range of SACS power angle. Finally, experimental results verify the effectiveness of proposed method.","PeriodicalId":13093,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Power Electronics","volume":"14 5","pages":"6389-6405"},"PeriodicalIF":5.7,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147350318","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":"Model-Predictive Active-Damping Control of Dual-Active-Bridge Converter With Input LC Filter","authors":"Changming Zheng;Haorui Wu;Baowang Lu;Miao Xie;Zheng Gong;Tomislav Dragičević","doi":"10.1109/JESTPE.2026.3684805","DOIUrl":"10.1109/JESTPE.2026.3684805","url":null,"abstract":"The integration of an input LC filter with a dual-active-bridge (DAB) converter improves the quality of the input current. However, the interaction between the filter and converter can induce resonant instability. To address this issue, this article proposes a model-predictive active-damping control (MPADC) scheme for stabilizing the LC-filtered DAB (LC-DAB) converter system. First, an improved cost function is developed by incorporating output-voltage regulation and virtual-admittance-based active damping (AD), reshaping the DAB converter’s input impedance and effectively suppressing resonance. Then, an MPADC scheme with a continuous-control set is developed, which improves steady-state performance, enhances robustness to model mismatches, and reduces the number of physical sensors. Furthermore, theoretical analysis of the closed-loop impedance stability and robustness of the proposed MPADC is provided. Experimental results confirm the superiority of the proposed strategy over conventional model predictive control (MPC) approaches.","PeriodicalId":13093,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Power Electronics","volume":"14 5","pages":"5624-5636"},"PeriodicalIF":5.7,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147695572","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":"Full-Power-Range Instantaneous Flux and Current Control of Three-Phase DAB Converters With Different Winding Configurations","authors":"Haojie Xie;Mingwei Lu;Zhenyi Li;Jingxin Hu","doi":"10.1109/JESTPE.2026.3684310","DOIUrl":"10.1109/JESTPE.2026.3684310","url":null,"abstract":"The three-phase dual-active bridge (DAB3) converter, a promising topology for high-power DC–DC conversion, suffers from transient overshoots and DC bias under conventional single phase shift (SPS) modulation during a phase shift angle change. While instantaneous flux and current control (IFCC) effectively suppresses transient flux/current overshoots and DC bias in Y–Y-connected transformers and phase shift angle below <inline-formula> <tex-math>$pi /3$ </tex-math></inline-formula>, its applicability to different winding configurations and wider phase shift angle range remains unexplored. This is particularly important for DAB3 converters with <inline-formula> <tex-math>$Delta $ </tex-math></inline-formula>-connected windings, which experience higher switch current stress. This article presents a generalized space-vector model to evaluate the transient performance of DAB3 converters with Y–Y, Y–<inline-formula> <tex-math>$Delta $ </tex-math></inline-formula>, and <inline-formula> <tex-math>$Delta $ </tex-math></inline-formula>–<inline-formula> <tex-math>$Delta $ </tex-math></inline-formula> configurations over the full power range. The analysis reveals that the original IFCC parameters are not optimal for the Y–<inline-formula> <tex-math>$Delta $ </tex-math></inline-formula> configuration, and an improved distribution factor is derived to minimize flux linkage overshoots. Furthermore, an integration scheme combining the IFCC method with an active phase current balancing strategy is proposed to mitigate three-phase parameter inconsistencies. Simulation and experimental results are provided to validate the analysis, demonstrating enhanced transient performance in extended operating conditions.","PeriodicalId":13093,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Power Electronics","volume":"14 5","pages":"5637-5653"},"PeriodicalIF":5.7,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147695566","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}