IEEJ Transactions on Electrical and Electronic Engineering最新文献

{"title":"Finite Control Set Model Predictive Current Control with Constant Switching Frequency Regulation for PMSM Drives","authors":"Liguo Yang,&nbsp;Hongmei Li,&nbsp;Jingyao Yang,&nbsp;Shilei Li,&nbsp;Qingqiang Meng,&nbsp;Mengyu Zhang","doi":"10.1002/tee.70045","DOIUrl":"https://doi.org/10.1002/tee.70045","url":null,"abstract":"<p>Due to the absence of a modulator stage, finite control set model predictive control (FCS-MPC) exhibits a variable switching frequency, which is one of the main drawbacks when it is applied to power converters and motor drives. Conventional methods achieve the constant switching frequency by modifying the cost function. However, an additional weighting factor is required. In this paper, a novel FCS-MPC with the constant switching frequency is proposed. To avoid the use of a weighting factor, a current error control band (CECB) is used to balance the current control and switching frequency regulation. Furthermore, it is investigated that the switching frequency decreases as the width of the CECB increases. Based on this principle, a switching frequency controller is proposed to online adjust the width of the CECB according to the switching frequency error between the reference and feedback values. This method allows FCS-MPC to operate at a reduced switching frequency. More importantly, the switching frequency can be concentrated at a constant value without requiring the weighting factor. The proposed method is verified experimentally under various operating conditions. © 2025 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.</p>","PeriodicalId":13435,"journal":{"name":"IEEJ Transactions on Electrical and Electronic Engineering","volume":"20 10","pages":"1649-1659"},"PeriodicalIF":1.1,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144927798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thrust Ripple Optimization of Double-Sided Permanent Magnet Linear Synchronous Motor Based on Specific Harmonic Elimination Technology","authors":"Huimin Wang,&nbsp;Chengyuan Yu,&nbsp;Liyan Guo","doi":"10.1002/tee.70037","DOIUrl":"https://doi.org/10.1002/tee.70037","url":null,"abstract":"<p>Double-sided permanent magnet linear synchronous motor (D-PMLSM) is widely used in precision linear motion systems due to its high power density, high thrust, and high precision. However, due to the end effect caused by end breaking and the non-sinusoidal air gap magnetic field, there is a problem of large thrust fluctuation. In this paper, the influence of the end effect on the air gap region is weakened by optimizing the primary length. Second, the expressions of mover magnetomotive force, stator magnetomotive force, and permanent magnet magnetization are derived, and the relationship between mover magnetomotive force and permanent magnet magnetization is pointed out. The source of thrust fluctuation is qualitatively derived and analyzed, and the harmonic number of the mover magnetomotive force corresponding to each harmonic of thrust fluctuation is obtained. By comparing with the finite element method calculation results, the number of thrust harmonics to be eliminated is determined, and the equations for eliminating the specific order of mover magnetomotive force are derived and iteratively calculated. Finally, the improved motor model is established according to the obtained modulation parameters, and the thrust performance is compared with the structure before modulation. The results show that the specific harmonic elimination technology can effectively eliminate the specific mover magnetomotive force harmonics, thereby eliminating the corresponding thrust harmonics, reducing the thrust ripple, and improving the stability of the motor operation. © 2025 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.</p>","PeriodicalId":13435,"journal":{"name":"IEEJ Transactions on Electrical and Electronic Engineering","volume":"20 10","pages":"1626-1636"},"PeriodicalIF":1.1,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144927797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Winding Coefficient Calculation and Harmonic Suppression of Axial Flux Permanent Magnet Machine with PCB Winding","authors":"Peng Gao,&nbsp;Zhe Wang,&nbsp;Guodong Zhang,&nbsp;Bin Li","doi":"10.1002/tee.70040","DOIUrl":"https://doi.org/10.1002/tee.70040","url":null,"abstract":"<p>Currently, the performance calculation of axial flux permanent magnet machine (AFPMM) with PCB winding is mainly performed by finite element analysis (FEA) and analytical method. In contrast, the analytical method is more applicable in preliminary design and optimization calculations, while the 3D FEA is more applicable for verification of the final solution. However, when the analytical method is used, calculating the winding coefficient is crucial. It is related to the selection of the pole-slot combination, which directly affects the back electromotive force (EMF) and the magnetomotive force. It even affects the power factor and operating efficiency. This paper focuses on the calculation methods of winding coefficient for different PCB windings. Then, the influence regulation of PCB winding geometrical parameters on the fundamental and harmonic winding coefficients is investigated. In that way, a new winding structure is proposed to suppress the harmonic of back EMF. The correctness of the studied method is verified through 3D FEA and experimental study of the prototype. The proposed new structure is effective for harmonic suppression of back EMF. © 2025 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.</p>","PeriodicalId":13435,"journal":{"name":"IEEJ Transactions on Electrical and Electronic Engineering","volume":"20 11","pages":"1802-1812"},"PeriodicalIF":1.1,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145197070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"One-Stage Long-Tailed Object Detection Based on Adaptive Class Suppression Equalized Focal Loss","authors":"Qian Yang,&nbsp;Xin Feng,&nbsp;Shuqiu Tan","doi":"10.1002/tee.70027","DOIUrl":"https://doi.org/10.1002/tee.70027","url":null,"abstract":"<p>When dealing with long-tailed data, performance is degraded due to the model's bias in classifying most of the tail categories. Although good results have been achieved for long-tailed object detection, almost all long-tailed object detectors are based on a two-stage paradigm. One-stage detectors have advantages such as fast inference speed and ease of deployment, making them more common in practical applications. However, in-depth research on one-stage long-tail object detection is still lacking. Under the one-stage object detection paradigm, the main reasons for performance degradation in long-tailed object detection models are as follows: (1) the extreme imbalance between foreground samples and background samples; (2) the long-tailed problem among foreground categories; (3) insufficient diversity of samples in the tail categories, which makes it difficult for the model to focus on the important features of the tail samples. To address these problems, this paper proposes the adaptive class suppression equalized focal loss (AEFL), which introduces adaptive class suppression weight parameters to dynamically suppress excessive negative gradients generated by a large number of negative samples during training, thereby improving tail category accuracy. Meanwhile, a channel self-attention mechanism is introduced in the C5 and C4 layers of the FPN, which contain rich semantic information, to enable the implicit clustering of objects of the same category and enhance semantic continuity. The improved CSA-FPN helps the model pay more attention to important features, and when dealing with long-tailed categories, it can better focus on the features of these categories, further enhancing the effect of AEFL. The methods in this paper are extensively tested on the LVIS-0.5 dataset and a long-tailed object detection dataset on the Kaggle platform, and the experimental results show that the proposed methods outperform most of the existing one-stage detection networks on two different long-tailed datasets. © 2025 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.</p>","PeriodicalId":13435,"journal":{"name":"IEEJ Transactions on Electrical and Electronic Engineering","volume":"20 9","pages":"1424-1435"},"PeriodicalIF":1.1,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144767956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Study of Fish Bite Data Collection System Using Acceleration Sensor for Sabiki Fishing","authors":"Yoshiaki Taniguchi,&nbsp;Takuto Harada,&nbsp;Shun Kawahara","doi":"10.1002/tee.70035","DOIUrl":"https://doi.org/10.1002/tee.70035","url":null,"abstract":"<p>In this letter, we conduct an initial verification to see if it is possible to detect a fish bite and estimate the water depth of a fishing rig using acceleration data obtained from a device attached to a fishing rod in the case of Sabiki fishing. We developed a prototype of a fish bite data collection system using an off-the-shelf and low-performance device. Through experimental evaluations, we showed the possibility of detecting fish bites using acceleration data. In addition, we confirmed that the smallest mean absolute error of water depth estimation of our proposed system is 0.131 m. © 2025 The Author(s). <i>IEEJ Transactions on Electrical and Electronic Engineering</i> published by Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.</p>","PeriodicalId":13435,"journal":{"name":"IEEJ Transactions on Electrical and Electronic Engineering","volume":"20 10","pages":"1660-1662"},"PeriodicalIF":1.1,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/tee.70035","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144927742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"TCRRT: A Novel Path Planning Approach of Field Robots for Optimizing the Traversal Cost in Diversified Terrains","authors":"Botao Zhang,&nbsp;Yawen Li,&nbsp;Tao Hong,&nbsp;Ruoyao Wang,&nbsp;Jian Wang,&nbsp;Anton A. Zhilenkov,&nbsp;Sergey A. Chepinskiy","doi":"10.1002/tee.70034","DOIUrl":"https://doi.org/10.1002/tee.70034","url":null,"abstract":"<p>The identification of feasible regions is crucial for navigation and path planning of robots. When robots travel across different terrains, their speeds and energy consumption vary dramatically. Considering the different energy costs in various terrains, this study proposes a novel path planning strategy for robots that work in diversified complex terrains. First, the energy cost is evaluated under different terrains such as concrete, wood, and grass. Then, a terrain cost map is designed to record the difference in energy costs, in which the terrain is recognized and segmented by a light network Psp-MobileNet. According to the energy cost of terrains, a path planning approach named Terrain Cost Rapidly-exploring Random Trees (TCRRT) is proposed to optimize the traversal cost. In the above approach, the cost function could balance the energy cost and distance in various terrains and generate a dynamically feasible and low-cost path. Finally, the effectiveness of the TCRRT algorithm is verified by simulation and real-world navigation experiments on diversified terrains. © 2025 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.</p>","PeriodicalId":13435,"journal":{"name":"IEEJ Transactions on Electrical and Electronic Engineering","volume":"20 10","pages":"1614-1625"},"PeriodicalIF":1.1,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144927741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Topology Identification of Distribution Network Based on Fourier Kolmogorov-Arnold Networks","authors":"Jianbin Liang,&nbsp;Longhua Mu,&nbsp;Chongkai Fang","doi":"10.1002/tee.70031","DOIUrl":"https://doi.org/10.1002/tee.70031","url":null,"abstract":"<p>Large-scale distributed energy resource access has made the operation mode of the distribution network more complex, thereby increasing the difficulty of quickly, and accurately identifying its topology. To address this problem, this paper proposes a topology identification method for distribution networks based on Extreme Gradient Boosting (XGBoost) and Fourier Kolmogorov-Arnold Networks (FourierKAN). Firstly, the importance of voltage amplitudes of all nodes is calculated through the XGBoost algorithm. Then, feature selection is performed, and the feature subset is constructed. Kolmogorov-Arnold Networks (KAN) enhanced with Fourier series is utilized to establish the FourierKAN model, and the mapping relationship between the sample data and the distribution network topology can be derived. Finally, the proposed topology identification method is verified on the standard IEEE 33-node and IEEE 70-node distribution networks. The results show that the proposed method can use the voltage amplitudes of certain nodes to identify the network topology accurately, and the FourierKAN model has outstanding accuracy and computational efficiency. © 2025 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.</p>","PeriodicalId":13435,"journal":{"name":"IEEJ Transactions on Electrical and Electronic Engineering","volume":"20 10","pages":"1579-1588"},"PeriodicalIF":1.1,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144927743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Forecasting Dissolved Gas Concentration in Transformer Oil Using the AdaSTDM","authors":"Weiqing Lin,&nbsp;Rui Zhao,&nbsp;Jing Chen,&nbsp;Hao Jiang,&nbsp;Sa Xiao,&nbsp;Xiren Miao","doi":"10.1002/tee.70024","DOIUrl":"https://doi.org/10.1002/tee.70024","url":null,"abstract":"<p>Accurately forecasting dissolved gas concentration (DGC) in transformer oil is crucial for ensuring the safety and reliability of power transformers and facilitating early anomaly warning. Current methods for forecasting DGC demonstrate limited effectiveness in non-stationary characteristics with data-distribution shifts. To address this, this paper presents a novel adaptive segmented temporal distribution matching (AdaSTDM) model, consisting of the Toeplitz inverse covariance-based clustering (TICC) algorithm and time distribution matching (TDM) algorithm. To effectively adapt to the different state distribution of the DGC data, the TICC algorithm is used to segment the state domain of the DGC sequence, and the Jensen-Shannon (JS) divergence is used as an indicator to evaluate the segmentation results. The TDM module is designed to mitigate data-distribution mismatches by learning common knowledge among different gas states. Experimental results across two real-world cases illustrate that the proposed AdaSTDM outperforms various advanced methods in predicting both stationary and non-stationary DGC data. © 2025 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.</p>","PeriodicalId":13435,"journal":{"name":"IEEJ Transactions on Electrical and Electronic Engineering","volume":"20 9","pages":"1382-1392"},"PeriodicalIF":1.1,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144767962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Pricing and Energy-Sharing Strategies for a Commercial Building-Based Virtual Power Plant","authors":"Shunfu Lin,&nbsp;Hao Wang,&nbsp;Yunwei Shen,&nbsp;Hao Yu,&nbsp;Dongdong Li","doi":"10.1002/tee.70023","DOIUrl":"https://doi.org/10.1002/tee.70023","url":null,"abstract":"<p>As distributed resources within buildings continue to grow, buildings have had a significant impact on the stability of the distribution network. It's urgent to effectively achieve regional power balancing and consumption within building clusters. Virtual power plants (VPP) are believed to be effective in aggregating and managing distributed resources. In this paper, an optimal pricing and energy-sharing mechanism for the commercial building-based VPP is proposed to promoting power balance in building clusters. The virtual power plants operator's (VPPO) pricing strategy is determined based on the Stackelberg game, considering the cooperative game of lower-tier buildings with energy sharing. A LHS and Kantorovich-distance-based scene generation and reduction method is used to deal with the uncertainties of PV, WT, and load power in buildings. Then, an improved Shapley-value method is proposed to distribute the benefits of cooperation to the buildings. Moreover, a Shapley-valued-based carbon-credit apportionment method is developed to form the range of emission allowance for each building. The simulation results verify the effectiveness of the proposed optimal pricing and energy-sharing mechanism, which can promote the power balance among multiple buildings while reducing the carbon emissions of the VPP. © 2025 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.</p>","PeriodicalId":13435,"journal":{"name":"IEEJ Transactions on Electrical and Electronic Engineering","volume":"20 10","pages":"1557-1570"},"PeriodicalIF":1.1,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144927775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Concise Grid-Fault Current Expression for Doubly Fed Induction Generator Under Uninterrupted Control","authors":"Chun Mo,&nbsp;Tianyao Ji,&nbsp;Luliang Zhang,&nbsp;Aoxuan Lu,&nbsp;An Li","doi":"10.1002/tee.70017","DOIUrl":"https://doi.org/10.1002/tee.70017","url":null,"abstract":"<p>Numerous methods have been developed to derive the stator short-circuit current expression for DFIG, resulting in a variety of forms of current expressions. These expressions are too complex in form to facilitate further development and utilization, without considering the role of power grids. In addition, the relationship between different expressions is not clear, which is not conducive for engineers to make selective research. Therefore, this paper conducts a detailed analysis of the stator short-circuit current based on the proposed rotor equivalent circuit, which derives a concise expression for the stator short-circuit current. The expression considers the effects of the control parameter and power grids. Moreover, this paper reveals the interrelationships between three types of current expressions. The validity of the proposed concise short-circuit current expression is verified by a grid-connected DFIG simulation model built in PSCAD/EMTDC. © 2025 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.</p>","PeriodicalId":13435,"journal":{"name":"IEEJ Transactions on Electrical and Electronic Engineering","volume":"20 10","pages":"1545-1556"},"PeriodicalIF":1.1,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144927804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}