{"title":"Metaheuristic Algorithm–Based Parameter Estimation for Permanent Magnet DC Motors","authors":"Po-Wen Hsueh, Mohamad Farid Fazdi","doi":"10.1049/elp2.70166","DOIUrl":"https://doi.org/10.1049/elp2.70166","url":null,"abstract":"<p>Accurate parameter estimation of permanent magnet DC motors (PMDC) is essential for enhancing the required performance, stability and reliability in modern control systems. To establish a precise dynamic model of a PMDC motor, seven primary parameters must be accurately identified. This study presents a comprehensive comparative analysis of four metaheuristic optimization algorithms for PMDC parameter estimation: original particle swarm optimization (PSO), modified PSO incorporating constriction factor, hybrid PSO integrated with least squares method (LSM) and ant colony optimization (ACO). The algorithms are evaluated based on experimental current and speed response data. Results demonstrate that the proposed hybrid PSO–LSM approach achieves the best accuracy by synergistically combining global exploration with local refinement capabilities. Modified PSO ranks second, exhibiting accuracy comparable to ACO while demonstrating significantly faster computational efficiency. ACO delivers competitive estimation results but suffers from slower convergence rates. Original PSO provides the fastest computation time although its accuracy is lower. All algorithms maintain RMSE below 1%, confirming their effectiveness for PMDC parameter estimation. The findings indicate that hybrid PSO–LSM offers superior estimation accuracy and robustness. However, with a convergence time of approximately 5.2 min, the method is not intended for real-time adaptive control but is highly suitable for offline high-precision motor identification and initial commissioning applications.</p>","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"20 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.70166","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147696405","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":"Impact of Position Measurement Angle Error on Performance of PMSM Drives for Electric Power Steering in a Wide Speed Range","authors":"Xi Liu, Yingzhe Wu, Hengbin Zhang, Yuxiang Xue, Lisheng Wang, Hui Li, Shan Yin","doi":"10.1049/elp2.70156","DOIUrl":"https://doi.org/10.1049/elp2.70156","url":null,"abstract":"<p>The permanent magnet synchronous motor (PMSM) serves as the power source for the electric power steering (EPS) system, which directly influences the steering feeling. Therefore, the control performance of the PMSM drive is crucial for the EPS system's overall performance. The position measurement angle error (contains measurement delay angle and periodic angle error) plays a significant role in PMSM drives, especially when the motor is rotating in the flux weakening (FW) region. In this paper, the impact of the position angle error on the performance of PMSM drives for EPS across a wide speed range is thoroughly examined. The effect of the measurement delay angle is analysed by considering the voltage and current constraint boundaries of the motor at different rotation speeds. Then, calibration and compensation of the position measurement delay angle are presented. Furthermore, the impact of the periodic angle error on current/torque ripple has been elaborated, and a sensorless control scheme is proposed to mitigate the current/torque ripple caused by such periodic error. According to the experimental results, it has been determined that the motor can operate stably over a wide speed range with an appropriate compensation of the measurement delay angle, and the current/torque ripple caused by the periodic angle error can be effectively eliminated with the proposed sensorless control scheme. As a result, it is confirmed that the analysis and discussion, as well as corresponding compensation methods, demonstrated in this paper can improve the steering feeling of the EPS.</p>","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"20 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.70156","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147696268","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}
Pu Pu, Dong Hou, Houjun Wang, Junhao Wang, Wanyu Yang
{"title":"Jitter Injection Techniques in High Speed SerDes Test","authors":"Pu Pu, Dong Hou, Houjun Wang, Junhao Wang, Wanyu Yang","doi":"10.1049/elp2.70152","DOIUrl":"https://doi.org/10.1049/elp2.70152","url":null,"abstract":"<p>With the widespread implementation of smart grids, the communication bandwidth of such systems continues to grow. As a result, jitter injection has become a common practice in system reliability test to evaluate timing robustness under realistic operating conditions. In the past research, only random jitter injection was implemented through phase interpolation techniques. To thoroughly investigate the impact of jitter on signal transmission, this study introduces an innovative jitter injection scheme based on phase adjustment and jitter decomposition principles. Specifically, this paper utilised a direct digital synthesis (DDS)-based jitter synthesis technique and a jitter transmission model in phase-locked loop (PLL) to realise a more complex jitter injection. This integration enables accurate injection of different jitter components in the amplitude spectrum from 0 to 2UI in high-speed SerDes systems. To validate the effectiveness of the proposed scheme, a high-speed serial link test platform was developed, which utilises the novel jitter injection method to characterise critical signal metrics, such as eye diagrams and distribution histogram. Experimental results demonstrate that the proposed scheme effectively replicates both random and periodic jitter present in communication links, thereby providing robust technical support for the design and optimisation of high-speed serial link systems.</p>","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"20 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.70152","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147696266","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":"Natural Soft-Switching Extended Phase-Shift Control of Dual Active Bridge for High-Efficiency Battery Charging and Discharging","authors":"Yunxiang Jiang, Yihui Xia, Qingxin Guan, Jingru Zhang","doi":"10.1049/elp2.70159","DOIUrl":"https://doi.org/10.1049/elp2.70159","url":null,"abstract":"<p>The dual active bridge (DAB) converter, owing to its capability for electrical isolation and bidirectional energy flow, is well-suited for battery charging and discharging applications. Existing battery charging strategies typically exhibit low voltage and high current during the initial charging phase followed by high voltage and low current during the later phase. Under these operating conditions, achieving zero voltage switching (ZVS) for all DAB switching devices is challenging, which limits the efficiency and overall performance. To address these limitations, this paper adopts a Neutral-Point-Clamped H-bridge (NPC-H) DAB topology to mitigate voltage stress on the input-side switches. For both charging and discharging scenarios, a direct current control method is proposed using the output current as the primary control variable. Additionally, a Natural Soft-switching Extended-Phase-Shift (NSEPS) strategy is introduced to optimise current stress while leveraging natural soft-switching, ensuring efficiency optimisation across the entire charging cycle. Simulation and experimental results validate the theoretical analysis demonstrating a peak efficiency of 97.52%.</p>","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"20 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.70159","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147666232","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}
Sang Bin Lee, Konstantinos N. Gyftakis, Pinjia Zhang, Carlos A. Platero, Roberts Neimanis, Karim Younsi
{"title":"Review of Frequency Response Analysis for Testing of Rotating Electric Machines","authors":"Sang Bin Lee, Konstantinos N. Gyftakis, Pinjia Zhang, Carlos A. Platero, Roberts Neimanis, Karim Younsi","doi":"10.1049/elp2.70162","DOIUrl":"https://doi.org/10.1049/elp2.70162","url":null,"abstract":"<p>With the increasing trend in the electrification of transportation and renewable energy sources, the reliability of rotating electric machines is becoming crucial, and this has driven active research on identifying new test methods. There has been an increasing interest in evaluating the effectiveness of frequency response analysis for testing rotating machines as it has been proven to be a convenient, noninvasive and versatile test. Active research on evaluating the feasibility of applying frequency response analysis for maintenance testing and quality assurance of rotating machines and components has been performed over the last 7–8 years. The purpose of this article is to provide a summary and critical analysis of the latest research published on the application of frequency response analysis (FRA) to rotating electric machines. The challenges and recommendations for future work are given based on a critical evaluation of the literature to support research and development efforts towards industrial needs.</p>","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"20 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.70162","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147568144","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}
Maksim A. Sitnikov, Julien Taurines, Anouar Belahcen
{"title":"Semi-Analytical Method for 3D-Aware Performance Estimation of High-Speed Synchronous Reluctance Machines With a Continuously Skewed Axially Laminated Rotor","authors":"Maksim A. Sitnikov, Julien Taurines, Anouar Belahcen","doi":"10.1049/elp2.70163","DOIUrl":"https://doi.org/10.1049/elp2.70163","url":null,"abstract":"<p>This paper proposes a semi-analytical method for estimating electric motor losses in the high-speed synchronous reluctance machine with a continuously skewed axially laminated anisotropic (ALA) rotor. The method is based on a precomputed loss profile for the unskewed configuration, which is analytically extended to incorporate the effects of rotor skewing. To validate the proposed approach, a two-stage comparison is performed: First, against a 2D sliced finite element model of rotor cross-sections, and then against a complete 3D finite element model. The results show excellent agreement across all models, demonstrating the method ability to capture critical three-dimensional effects with drastically reduced computational effort. The proposed technique provides a practical and efficient tool for the early-stage design and optimisation of skewed reluctance machines, particularly in the context of high-speed and additive-manufactured applications.</p>","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"20 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.70163","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147567649","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":"Force Analysis and Torque Production of the Doubly Salient Parallel Path Magnetic Machine","authors":"Maryam Salehi, Madhav Manjrekar","doi":"10.1049/elp2.70150","DOIUrl":"https://doi.org/10.1049/elp2.70150","url":null,"abstract":"<p>An in-depth mathematical analysis of torque and force production mechanisms is presented in this paper for the Doubly Salient Parallel Path Magnetic Motor (DS-PPMM). This paper focuses on a comprehensive torque force analysis through analytical modelling and is verified by a detailed finite element analysis (FEA). Electromagnetic force distribution, torque ripple characteristics and the contributions of magnetic salience to overall torque production and performance of the machine are analysed. Tangential and radial components of the force vectors are computed using Maxwell's stress tensor. The results confirm the effectiveness of DS-PPMM in offering high torque density with low torque ripple.</p>","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"20 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.70150","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147567032","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":"Adaptively Adjustable Control Compensation With a Decoupling Basis for Current Control of All Parametric Variations’ IPMSM","authors":"Shin-Hung Chang, Yi-Cheng Huang, Po-Cheng Hung","doi":"10.1049/elp2.70164","DOIUrl":"https://doi.org/10.1049/elp2.70164","url":null,"abstract":"<p>In this paper, a simply and adaptively adjustable control with decoupling technique is proposed for robust current control in an interior permanent magnet synchronous motor (IPMSM). Based on the Lyapunov stability theorem, all parametric variations in an IPMSM are thoroughly considered without knowledge of variation bounds. The system robustness, as well as stability is guaranteed. Combined with simple decoupling terms provide control voltage basis under known modelled parameters. Adaptively equivalent proportional and integral compensation control speeds up current tracking response under all parametric variations in an IPMSM, which greatly reduces the computational burden of a microprocessor. To verify its practical effectiveness, the proposed straightforward control algorithm is implemented using a TMS320F28377 DSP. Comparative simulations show the IPMSM under large variations’ assumptions. Experimental results show that overshoot in <i>q</i>-axis current can be roughly reduced from 10% to 1.5%–2% and overshoot in <i>d</i>-axis current can be roughly reduced from 50% to 5%, respectively. Steady time in <i>d-q</i> axes can be roughly reduced by 50%. It demonstrates the effectiveness and feasibility of the proposed control algorithm.</p>","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"20 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.70164","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147567031","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}
Cuicui Huang, Zikang Li, Chunhui Dai, Zhiqiang Long
{"title":"Damping Compensation for Active Vibration Isolation System With Active Disturbance Rejection Control","authors":"Cuicui Huang, Zikang Li, Chunhui Dai, Zhiqiang Long","doi":"10.1049/elp2.70145","DOIUrl":"https://doi.org/10.1049/elp2.70145","url":null,"abstract":"<p>In active vibration isolation systems (AVIS) with electromagnetic actuators, a fundamental trade-off exists between high-precision suspension control and effective vibration isolation. Although the classic active disturbance rejection control (ADRC) framework can estimate and compensate for disturbances, its conventional design tends to prioritise gap stabilisation without fully leveraging vibration feedback from the isolated object. This paper proposes a damping compensation-based ADRC (DC-ADRC) framework that integrates real-time vibration information from the isolated object to overcome this limitation. The extended state observer (ESO) is utilised to estimate disturbances in the relative position loop to ensure suspension stability, whereas a newly designed damping compensator actively incorporates absolute acceleration feedback to improve isolation performance. This new control strategy enhances both disturbance rejection and vibration isolation performance. Simulations and experimental results indicate that the controller provides outstanding vibration isolation performance, improving active isolation capabilities and effectively preventing mechanical collisions.</p>","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"20 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.70145","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147566568","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 Scalable FPGA-Based Time-Division Multiplexing Architecture for High-Precision Synchronous Control of Large-Scale Micro DC Motors","authors":"Xilin Zhang, Bangji Wang, Mingrui Gou, Mengxuan Wang, Yong Huang","doi":"10.1049/elp2.70158","DOIUrl":"https://doi.org/10.1049/elp2.70158","url":null,"abstract":"<p>High-precision synchronous control of multiaxis motors is essential in systems that require large-scale high-accuracy motion coordination, such as phased array radar antennas. Traditional field-programmable gate array (FPGA) control architectures, however, typically employ a ‘single-axis single intellectual property (IP) core’ design, which faces inherent limitations. As the number of axes increases, the required logic resources grow linearly. This restricts the system's ability to support large-scale multiaxis systems on a single FPGA chip. Additionally, parameter variations among motors introduce complexity into the controller tuning. To overcome these limitations, this paper proposes an FPGA-based large-scale time division multiplexing (LTDM) method. This method determines the maximum number of axes that can be processed in one cycle by quantifying control time. Then, it designs a parallel time division multiplexing (TDM) architecture to expand the control scale. Cascaded buffering and pipeline segmentation are employed to address timing issues resulting from high fanout. To address the challenge of multimotor parameter tuning, a particle swarm optimisation (PSO)-based self-tuning strategy is developed, using a trajectory tracking evaluation function for automatic parameter adjustment. Experimental results demonstrate that the proposed method reduces logic resource consumption by 79.86% in an 88-axis micro DC motor servo system, with all motors maintaining position tracking errors within <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mo>±</mo>\u0000 <mn>2</mn>\u0000 <mo>°</mo>\u0000 </mrow>\u0000 <annotation> $pm 2{}^{circ}$</annotation>\u0000 </semantics></math>. This study exhibits strong scalability and application promotion value.</p>","PeriodicalId":13352,"journal":{"name":"Iet Electric Power Applications","volume":"20 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/elp2.70158","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147565805","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}