Iet Electric Power Applications最新文献

{"title":"Robust multi-objective optimisation of an axial-radial flux hybrid excitation permanent magnet synchronous motors based on improved sequential Taguchi method","authors":"Naixi Xu,&nbsp;Ning Li,&nbsp;Xiaodong Sun,&nbsp;Yong Wang,&nbsp;Bingkuan Wan","doi":"10.1049/elp2.12543","DOIUrl":"https://doi.org/10.1049/elp2.12543","url":null,"abstract":"<p>This paper proposes a novel axial-radial flux hybrid excitation permanent magnet synchronous motor (ARFHE-PMSM), which has better space utilisation and torque density than traditional radial flux PMSM (RFPMM) and axial flux PMSM (AFPMSM). Due to the complex mechanical structure of ARFHE-PMSM, the computation burden is higher and larger than RFPMM and AFPMSM. Therefore, the sequential Taguchi optimisation method is proposed to improve the performance of ARFHE-PMSM and reduce computation burden. The torque, torque ripple, core loss and permanent magnet volume of ARFHE-PMSM are optimisation targets. In the optimisation process, the design parameters are divided into non-sensitive and sensitive parameters based on the sensitivity analysis results. The non-sensitive parameters are first optimised through the finite element model and then the sensitive parameters are optimised. The motor's manufacturing errors are considered in the optimisation process, and the Gaussian membership function and characteristic index are utilised to transform the multi-objective optimisation problem into a single-objective optimisation problem. The iterative Taguchi method narrows the optimisation scope until the convergence conditions are met. The optimal combination of different design parameters of the motor is obtained by analysing the experimental results. Compared with the initial design, the electromagnetic performance and robustness of the ARFHE-PMSM have been significantly increased.</p>","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"19 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.12543","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117916","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":"Model predictive control with adjustable switching frequency for induction motor drives based on three-dimensional satisfaction space optimisation","authors":"Bo Yang,&nbsp;Xiang Wu,&nbsp;Yu Tian,&nbsp;Zhikang Guo,&nbsp;Xu Zhang,&nbsp;Guojun Tan","doi":"10.1049/elp2.12547","DOIUrl":"https://doi.org/10.1049/elp2.12547","url":null,"abstract":"<p>This paper proposes a model predictive control strategy for induction motors driven by three-level inverters, enabling effective switching frequency adjustment. First, a three-dimensional satisfaction space optimisation strategy is proposed, eliminating the need for weight coefficient adjustments through self-constraints and mutual constraints of the optimisation variables. The optimal switching state is selected by comparing the maximum average dwell time within the satisfaction space, thus reducing the inverter switching frequency. Second, switching frequency is treated as an auxiliary optimisation variable, and a dynamic sliding window method is designed to efficiently track switching frequency in variable-speed systems. The boundaries of the three-dimensional satisfaction space are adjusted to regulate the switching frequency. Finally, experimental results demonstrate that the proposed strategy maintains the switching frequency of 300 Hz across the entire speed range, achieving excellent dynamic and steady-state performance at this low switching frequency.</p>","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"19 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.12547","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117971","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":"High-dimensional optimal design of dual-rotor synchronous reluctance machines based on data-driven torque decomposition","authors":"Farnam Farshbaf-Roomi,&nbsp;Aran Shoaei,&nbsp;Jianguo Zhu,&nbsp;Qingsong Wang","doi":"10.1049/elp2.12535","DOIUrl":"https://doi.org/10.1049/elp2.12535","url":null,"abstract":"<p>The multi-objective optimal design of double-sided stator dual-rotor synchronous reluctance machines (DSS-DRSynRMs) is a challenging high-dimensional problem. The objective of this paper is to present a new optimal design method based on data-driven models and the principle of torque decomposition addressing the aforementioned issue. For this purpose, a 26-parameter optimisation problem is solved by employing the proposed method consisting of three sequential phases. Through the proposed method, the combination of artificial neural network (ANN) and recently introduced waveform targeting surrogate model (WTSM) strategy is investigated to mitigate the computational complexity of the optimisation process. Furthermore, the electromagnetic performance of the final optimal design has been comprehensively analysed showing a significant reduction in torque ripple rate and improved torque density. Moreover, the computational efficiency of the proposed method has been compared to the popular multi-level multi-objective optimisation method. From the discussion, it can be found that the proposed method provides a reduced computation time and wider search space.</p>","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"19 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.12535","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117972","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":"Numerical and analytical investigations of the water immersion cooling strategy for a permanent magnet synchronous motor","authors":"Tohid Sharifi","doi":"10.1049/elp2.12546","DOIUrl":"https://doi.org/10.1049/elp2.12546","url":null,"abstract":"<p>Permanent magnet synchronous motors (PMSMs) experience considerable performance degradation due to the rise in temperature and the resulting partial demagnetisation in the PMs, as well as the shortenings in the insulations' lifetime. To mitigate the temperature of motor components, it is crucial to investigate and continually improve the design of efficient cooling systems. This study implements the water immersion cooling (WIC) concept on a surface-mounted PMSM (SMPMSM), where through comparing its cooling performance with the forced ventilation cooling (FVC), it is indicated that, even at high inlet velocities for the latter, it cannot maintain the temperature below the specified thresholds and the required input electric power to run the ventilation fan will be increased exponentially to compensate for its ineffectiveness. While in the WIC configuration, the winding and PM temperature values remain well below the margins when the heat transfer coefficient of this method is 40<span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>%</mi>\u0000 </mrow>\u0000 <annotation> $%$</annotation>\u0000 </semantics></math> higher than the FVC. By incorporating the effect of the cooling process through the heat transfer coefficient, the lumped-parameter thermal network (LPTN) is utilised to study the operation mode of the motor under the mentioned cooling configurations. Besides achieving higher cooling efficiency, the WIC strategy can quickly reduce temperature, which is reflected in the thermal time constant of the cooling method extracted from the LPTN. Consequently, it is demonstrated that up to 35<span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>%</mi>\u0000 </mrow>\u0000 <annotation> $%$</annotation>\u0000 </semantics></math> higher than the nominal generated heat, the SMPMSM under the WIC can operate continuously, while for the FVC, the frequent start-stop driving scenario should be employed.</p>","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"19 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.12546","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117963","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":"Fast calculation method of transformer harmonic magnetic field based on radial basis function augmented surrogate model","authors":"Shuguo Gao,&nbsp;Haoyu Liu,&nbsp;Qian Zang,&nbsp;Meng Guo,&nbsp;Gang Liu,&nbsp;Zhigang Zhang,&nbsp;Lujian Dai,&nbsp;Yunpeng Liu","doi":"10.1049/elp2.12544","DOIUrl":"https://doi.org/10.1049/elp2.12544","url":null,"abstract":"<p>Accurate and efficient calculation of a transformer's magnetic field is fundamental for the rapid calculation of its losses, temperature rise, and structural forces. However, existing numerical methods for calculating the harmonic magnetic field of a product-level transformer are time-consuming and fail to meet the rapid requirements of digital operations and maintenance. To address this, this paper first utilises the harmonic field method to obtain the snapshot matrix of the transformer's magnetic field. Subsequently, a response surface model of the magnetic field is constructed using intrinsic quadrature theory and radial basis functions in the augmented form. To enhance the efficiency of constructing the reduced-order model, an adaptive Latin hypercube sampling method, integrating the additive rule and leave-one-out cross-validation, is introduced, significantly improving the efficiency of sample space construction. The effectiveness of the proposed method is validated by applying the proper orthogonal decomposition-radial basis function including linear polynomial (POD-RBFLP) method to calculate the harmonic magnetic field of a three-phase power transformer in reduced order. The results are compared with those from COMSOL calculations, showing that the reduced-order model maintains the calculation error within a reasonable range, thereby confirming the accuracy of the proposed method. Additionally, the reduced-order model demonstrates a significant advantage in computation time compared to COMSOL simulations, enabling the calculation of the transformer's magnetic field in seconds.</p>","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"19 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.12544","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117915","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":"Improved loss minimisation control for interior permanent magnet synchronous motor based on loss angle optimisation","authors":"Qihuai Chen,&nbsp;Jiaxing Hu,&nbsp;Tianliang Lin,&nbsp;Shengjie Fu,&nbsp;Haoling Ren","doi":"10.1049/elp2.12541","DOIUrl":"https://doi.org/10.1049/elp2.12541","url":null,"abstract":"<p>Due to their high power density and superior drive performance, permanent magnet synchronous motors (PMSM) are extensively utilised in the mobile machine traction systems. Traditional id = 0 control produces relatively low torque per unit of current and is suitable for non-flux-weakening control. Traditional maximum torque per ampere (MTPA) control can enhance the torque output capability per unit of current, and is mainly used for interior PMSMs (IPMSMs) with salient poles. However, neither id = 0 control nor MTPA control fully considers the impact of copper losses, iron losses, and variations in motor parameters, resulting in suboptimal control efficiency of the PMSM. In this paper, to further enhance the energy efficiency of IPMSMs, models for iron loss and copper loss in IPMSMs are constructed and analysed. Compared to existing minimum loss optimisation algorithms, a minimum loss angle vector control method based on the loss models is proposed. The particle swarm optimisation algorithm is employed to achieve globally optimal <i>d</i>-<i>q</i> axis current distribution. In addition, considering the influence of parameter variations during the operation of IPMSMs on the efficiency improvement control, online parameter identification of the motor is investigated. Consider the impact of parameter variations on motor performance when using traditional proportional integral (PI) control, a neural network is employed for online tuning of the speed loop of IPMSMs. Experimental research is conducted to verify the effectiveness of the proposed control algorithm. The experimental results demonstrate that the proposed online tuning control algorithm exhibits superior control performance compared to the traditional PI control. Specifically, during the startup phase, the overshoot is reduced by 61.54%, and the adjust time is decreased by 33%. When load variations cause changes in rotational speed, the overshoot is red uced by 33%–60%, and the adjust time is shortened by 34%–50%. Furthermore, the minimum loss angle control can improve energy efficiency by more than 20% compared to id = 0 control, and by 6%–10% compared to MTPA control.</p>","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"19 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.12541","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117914","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":"Multi-level optimisation design of a yoke-less axial-field flux-switching permanent magnet motor considering the fault-tolerant capability","authors":"Javad Rahmani-Fard,&nbsp;Mohammed Jamal Mohammed","doi":"10.1049/elp2.12537","DOIUrl":"https://doi.org/10.1049/elp2.12537","url":null,"abstract":"<p>This paper proposes a multi-level optimisation design strategy aimed at enhancing the fault-tolerant capability of a Yoke-less Axial-Field Flux-Switching Permanent Magnet (YASA-AFFSPM) motor. The research addresses the crucial requirement for robustness and reliability in electric motor systems utilised in safety-critical applications. By employing a comprehensive multi-objective optimisation approach, the motor's design is refined at three levels based on the main effect stratification of design variables for the YASA-AFFSPM motor. The design variables are divided into three levels and optimised, resulting in the attainment of a comprehensive optimal solution that considers multiple design goals, including average torque, cogging torque, and fault-tolerant capability. The optimal design places a primary emphasis on attaining a substantial level of fault tolerance for both open- and short-circuit faults. This is accomplished by reducing the ratio of mutual-inductance to self-inductance. To streamline optimisation, the Kriging model approximates finite element analysis at each level. Furthermore, the effectiveness of the design is showcased through the utilisation of a dual-channel winding configuration. A prototype is constructed, and experimental validation demonstrates a significant improvement in fault-tolerance performance, with results indicating enhancements of 14% in average torque and 41% in cogging torque.</p>","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"19 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.12537","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143389072","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":"New low-noise sensorless control strategy for permanent magnet synchronous motor drives based on variable-frequency voltage signal injection","authors":"Haotian Zhu,&nbsp;Li Zhang,&nbsp;Zhongfei Peng,&nbsp;Feixue Tan,&nbsp;Lei Xu","doi":"10.1049/elp2.12538","DOIUrl":"https://doi.org/10.1049/elp2.12538","url":null,"abstract":"<p>This paper proposes a new low-noise sensorless control strategy for the permanent magnet synchronous motor (PMSM) drives to tackle audible noise caused by high-frequency injection method. The traditional noise reduction methods face limitation in improving estimated accuracy of rotor position due to the signal delay with fixed frequency signal. To overcome this issue, a low-noise sensorless control strategy is developed, which consists of two parts. First, with the injection of the proposed variable-frequency voltage signal, significant noise reduction can be achieved due to its characteristics of multi-frequency switching and multi-modal amplitude tuning. Secondly, a delayed effects-aware demodulated signal is designed to reduce the impact of system delay, which can further improve the estimation accuracy of rotor position. As a result, the proposed low-noise sensorless control scheme can suppress audible noise and further improve position estimation accuracy. Also, the steady-state and dynamic performances of the motor drive system can be enhanced. Finally, comparative experiments under steady-state and dynamic conditions demonstrate the superiority of the proposed method in PMSM.</p>","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"19 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.12538","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143389124","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":"Comparative study of electromagnetic vibration on single three-phase and dual three-phase permanent magnet machines with different winding layouts","authors":"Wanlu Xie,&nbsp;Weili Li,&nbsp;Haoyue Tang,&nbsp;Jianfeng Hong","doi":"10.1049/elp2.12534","DOIUrl":"https://doi.org/10.1049/elp2.12534","url":null,"abstract":"<p>The comparison between conventional single three-phase permanent magnet (STP-PM) machine and dual three-phase permanent magnet (DTP-PM) machine has primarily focused on performance and fault-tolerance ability. However, electromagnetic vibration behaviour is one of vital indicator for evaluating the comprehensive performance of the machine. In this paper, the mechanism of the effect on the vibration performance of the STP-PM machine and DTP-PM machine with different winding layouts is analysed. First, the coil electromagnetic force phasor diagrams with different winding layouts are given. Moreover, the harmonic distribution of the armature magnetomotive force (MMF) and air-gap electromagnetic force density (AEFD) in PM machines are analysed in detail, and vibration predictions are given. The result demonstrates that the PM machine with single-layer winding exists high amplitude of the armature MMF sub-harmonic components, especially at the first-order, while the DTP-PM machine can effectively suppress the fifth- and seventh- order harmonic components. And the AEFD amplitude at the major orders of DTP-PM machine with double-layer is the lowest which is of great significance to reduce vibration acceleration at 2<i>f</i>_<i>e</i>. Finally, the modal test and vibration measurement for a manufactured 24slot/22pole DTP-PM machine are carried out to validate the theoretical analysis and simulated results.</p>","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"19 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.12534","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143397243","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":"A novel fuzzy approach for winding paper insulation health monitoring of oil-immersed power transformer using non-destructive failure parameters","authors":"Md. Manzar Nezami,&nbsp;Hythem Hashem,&nbsp;Md. Danish Equbal,&nbsp;Shakeb A. Khan,&nbsp;Hasmat Malik,&nbsp;Fausto Pedro García Márquez,&nbsp;Asyraf Afthanorhan,&nbsp;Mohammad Asef Hossaini","doi":"10.1049/elp2.12533","DOIUrl":"https://doi.org/10.1049/elp2.12533","url":null,"abstract":"<p>Power transformers, a significant and critical component of power system, require regular condition monitoring by the utilities for uninterrupted power supply. The kraft paper made of cellulose is used as the solid insulation of the transformer which undergoes thermal, electrical and environmental stresses causing its progressive ageing. It thereby reduces the physical strength of the paper and ultimately affects the transformer's remaining useful life (RUL). The current state (physical) of the cellulosic (solid) insulating paper is predicted in this article using the fuzzy inference system (FIS) based RUL assessment technique. Three non-destructive parameters, that is, 2-Furfuraldehyde (2-FAL), Carbon Monoxide (CO) and Carbon dioxide (CO₂) are used to determine the value of the Degree of Polymerisation (i.e. DP) which directly reflects the current physical state of the insulating material. Four states (Healthy, Poor, Very Poor, and Worst) of the insulating paper are identified based on the values of DP. Five FIS models have been developed separately with different membership functions and a number of fuzzy if-then rules are formulated to estimate the value of DP. Every model is tested with 30 test samples to validate the system accuracy. The physical condition of the insulation estimated using FIS built with trapezoidal membership function has been found to be considerably precise with an average absolute deviation of 0.33%. Hence, a comprehensive assessment of transformer's health is carried out with the prominent non-destructive parameters.</p>","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"19 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.12533","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143397211","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}