CES Transactions on Electrical Machines and Systems最新文献_第2页

A Novel Segment-switching Strategy with the Current Transient Overshoot Suppression for Segmented Long-Stator Linear Motor 分段长定子直线电机一种抑制电流瞬态超调的分段开关策略

CES Transactions on Electrical Machines and Systems Pub Date : 2026-06-01 Epub Date: 2026-06-02 DOI: 10.30941/CESTEMS.2026.00017

Yanfei Li;Zixin Li;Hang Zhang;Fei Xu;Cong Zhao;Fanqiang Gao;Yaohua Li

{"title":"A Novel Segment-switching Strategy with the Current Transient Overshoot Suppression for Segmented Long-Stator Linear Motor","authors":"Yanfei Li;Zixin Li;Hang Zhang;Fei Xu;Cong Zhao;Fanqiang Gao;Yaohua Li","doi":"10.30941/CESTEMS.2026.00017","DOIUrl":"https://doi.org/10.30941/CESTEMS.2026.00017","url":null,"abstract":"The segmented power supply scheme for long-stator linear motor facilitates reducing power capacity and achieving a high power factor. However, the segment-switching process leads to overcurrent under high-speed conditions. This paper proposes a novel segment-switching strategy based on the time-optimal control theory. It employs time-optimal feedforward voltage and planned current traj ectory during the switching transient process. Thus, it ensures rapid disconnection of the exiting segment and rapid establishment of the current in the incoming segment, while suppressing transient current overshoot. The mathematical model of the long-stator linear motor is established in the process of segment-switching. It derives the minimum times required to force the exiting segment current to zero and to establish the incoming segment current to the reference value by time-optimal control theory. Furthermore, the time-optimal voltages and current traj ectories are calculated. The time-optimal current trajectories are used as the reference command for the current loop. The time-optimal feedforward voltages are introduced into the current loop control. Hence, it achieves rapid disconnection of the exiting segment and fast, accurate establishment of the incoming segment current. Experimental and simulation results collectively validate the effectiveness of the proposed segment-switching strategy.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":"10 2","pages":"188-203"},"PeriodicalIF":0.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11548522","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148442195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on Electrical Machine Phase Current Reconstruction Based on a DC-Bus Current Sensor 基于直流母线电流传感器的电机相电流重构研究

CES Transactions on Electrical Machines and Systems Pub Date : 2026-06-01 Epub Date: 2026-06-02 DOI: 10.30941/CESTEMS.2026.00016

Yu-Chao Fang;Yun-Chong Wang;Zhang-Hao Huang;Yue-Sheng Qi;Jian-Xin Shen

{"title":"Study on Electrical Machine Phase Current Reconstruction Based on a DC-Bus Current Sensor","authors":"Yu-Chao Fang;Yun-Chong Wang;Zhang-Hao Huang;Yue-Sheng Qi;Jian-Xin Shen","doi":"10.30941/CESTEMS.2026.00016","DOIUrl":"https://doi.org/10.30941/CESTEMS.2026.00016","url":null,"abstract":"In the field of high-performance motor control, accurate sampling of motor currents is essential for precise control and stability. To achieve reliable measurement of a motor's three-phase currents, it is typically necessary to install at least two high-precision current sensors. However, using multiple sensors increases the volume and cost of the control system, thereby creating challenges for cost management and controller miniaturization. This paper investigates a phase current reconstruction technique that employs only one current sensor mounted on the direct current (DC) bus. The primary goal is to address the current reconstruction dead zones that occur in low modulation regions and sector boundary regions under space vector pulse width modulation (SVPWM) control. To resolve this issue, two hybrid pulse width modulation (HPWM) methods are proposed: one combining remote state pulse width modulation (RSPWM), near state pulse width modulation (NSPWM), and SVPWM, and the other combining RSPWM and NSPWM. Experiments with different voltage utilization have been conducted for both types of HPWM. Both schemes enable 100% voltage utilization for motor control utilizing only a DC-bus current sensor, and the algorithm for HPWM determination has been introduced.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":"10 2","pages":"204-215"},"PeriodicalIF":0.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11548521","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148443039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Sensorless I-F Start-up Strategy for Flying Start of Ultra-High-Speed Permanent Magnet Motors based on Short-Circuit Transient Differentiation 基于短路暂态微分的超高速永磁电机飞启动无传感器I-F启动策略

CES Transactions on Electrical Machines and Systems Pub Date : 2026-06-01 Epub Date: 2026-04-27 DOI: 10.30941/CESTEMS.2026.00012

Wei Chen;Peizhe Liu;Lixiang Zhu;Xinmin Li;Zhezhun Xu

{"title":"A Sensorless I-F Start-up Strategy for Flying Start of Ultra-High-Speed Permanent Magnet Motors based on Short-Circuit Transient Differentiation","authors":"Wei Chen;Peizhe Liu;Lixiang Zhu;Xinmin Li;Zhezhun Xu","doi":"10.30941/CESTEMS.2026.00012","DOIUrl":"https://doi.org/10.30941/CESTEMS.2026.00012","url":null,"abstract":"Conventional current-to-frequency (I-F) start-up strategies apply only to zero-speed conditions. When a nonzero initial speed (referred to as a flying start) exists, loss of synchronism is likely to occur because the virtual synchronous reference frame fails to align with the rotor flux linkage direction. To meet the flying start requirements of ultra-high-speed permanent magnet motors, this paper proposes a sensorless I-F start-up strategy for flying starts based on differential analysis of short-circuit transients. Upon power-up, the inverter places the three-phase stator windings in a controlled short-circuit state and applies two short-duration short-circuit pulses at different instants. By sampling the phase variation of the stator current vectors during the two short-circuit transients, differential current characteristics are extracted to rapidly estimate the initial rotor position and speed, thereby facilitating smooth I-F start-up. The proposed method overcomes the limitations of conventional I-F strategies confined to zero-speed start-up and is applicable to oil-film and air-bearing supported motor systems. Experimental results validate a smooth flying start featuring continuous and impact-free stator currents, effective suppression of mechanical friction prior to air-film formation, and the enhanced stability and robustness of I-F start-up.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":"10 2","pages":"228-239"},"PeriodicalIF":0.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11495398","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148442264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Winding Phase-Shifting on Low-Space-Harmonic Design in Six-Phase Permanent-Magnet Synchronous Machine 绕组移相对六相永磁同步电机低空间谐波设计的影响

CES Transactions on Electrical Machines and Systems Pub Date : 2026-06-01 Epub Date: 2026-07-03 DOI: 10.30941/CESTEMS.2026.00021

Zihang Yuan;Yi Sui;Ping Zheng;Luming Cheng;Wei Liu;Jingang Bai

{"title":"Effect of Winding Phase-Shifting on Low-Space-Harmonic Design in Six-Phase Permanent-Magnet Synchronous Machine","authors":"Zihang Yuan;Yi Sui;Ping Zheng;Luming Cheng;Wei Liu;Jingang Bai","doi":"10.30941/CESTEMS.2026.00021","DOIUrl":"https://doi.org/10.30941/CESTEMS.2026.00021","url":null,"abstract":"Fractional-slot concentrated windings (FSCWs) are widely utilized in six-phase fault-tolerant permanent-magnet synchronous machines (PMSMs). However, FSCWs cause abundant space harmonics of stator magnetomotive force (MMF) and increase the losses of the machine. In this article, in order to suppress the space harmonics of a six-phase PMSM, the six-phase winding is regarded as a combination of two sets of three-phase windings, and the effect of phase-shifting between two sets of three-phase windings on the MMF harmonic suppression is investigated. To achieve more effective suppression of the MMF harmonics, the low-space-harmonic oriented design is further extended to phase-shifting between double six-phase windings while the phase number is not doubled. A low-space-harmonic double-six-phase 15°-shifting winding is designed, in which both J-pole-pair and 5-pole-pair MMF harmonics are suppressed, and its characteristics of losses, permanent-magnet (PM) torque, and reluctance torque are evaluated. A prototype of 24-slot/14-pole double-six-phase 15°-shifting PMSM is manufactured, and the experiments are carried out to verify the performance of the machine.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":"10 2","pages":"144-152"},"PeriodicalIF":0.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11594443","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148442489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantitative Analysis of Structure-related Spatial Harmonics on Torque Generation in Hybrid Excited Asymmetric Stator Pole Double Salient Machine for Integrated Machine Drive Applications 混合励磁非对称定子极双凸极电机转矩产生的结构相关空间谐波定量分析

CES Transactions on Electrical Machines and Systems Pub Date : 2026-06-01 Epub Date: 2026-06-02 DOI: 10.30941/CESTEMS.2026.00014

Chen Cao;Wei Xu;Jian Ge;Bin Du;Zhongyong Chen;Chuanjia Zhang;Lili Kang;Lei Zhang

{"title":"Quantitative Analysis of Structure-related Spatial Harmonics on Torque Generation in Hybrid Excited Asymmetric Stator Pole Double Salient Machine for Integrated Machine Drive Applications","authors":"Chen Cao;Wei Xu;Jian Ge;Bin Du;Zhongyong Chen;Chuanjia Zhang;Lili Kang;Lei Zhang","doi":"10.30941/CESTEMS.2026.00014","DOIUrl":"https://doi.org/10.30941/CESTEMS.2026.00014","url":null,"abstract":"With the rapid development of integrated machine drives (IMDs), hybrid excited asymmetric stator pole double salient machines (HEASPDSMs) have gained widespread attention owing to their flexible flux regulation ability, excellent heat dissipation capacity, and robust structure. As a type of flux modulation machine, HEASPDSMs exhibit numerous magnetic field harmonics due to their double-sided reluctance structure and introduction of asymmetric stator poles and excitation windings. These harmonics cause significant distortions in airgap flux density, back-electromotive-force (back-EMF), and torque. Traditional magneto motive force (MMF)-specific permeance analytical methods fail to quantify the torque contribution of individual structural-related spatial harmonics, which restricts the torque density improvement of HEASPDSMs. To mitigate the torque distortion and improve torque density, a novel evaluation model for both average torque and torque ripple of HEASPDSMs is proposed in this paper. Different from classical methods, the proposed model directly utilizes stator/rotor MMF and specific permeance as modulation components for torque calculation, which can quantitatively clarify the individual contribution of each modulation harmonic to torque and establish a direct correlation between harmonic contribution and structural parameters. Furthermore, its accuracy is validated via finite element analysis (FEA) by performing single-parameter-scan on four HEASPDSMs with different pole-pair combinations, during which the torque performance and flux regulation ability are analyzed. Finally, experimental validation is performed on a 12s7p HEASPDSM prototype to further verify the proposed model.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":"10 2","pages":"133-143"},"PeriodicalIF":0.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11548519","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148442949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cover 封面

CES Transactions on Electrical Machines and Systems Pub Date : 2026-06-01 Epub Date: 2026-07-03

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Content 内容

CES Transactions on Electrical Machines and Systems Pub Date : 2026-06-01 Epub Date: 2026-07-03

引用次数: 0

Dynamic Mechanism and Active Suppression of Rotor Beat Frequency Vibration in a Magnetic Levitation Induction Machine 磁悬浮感应电机转子振频振动的动力机理及主动抑制

CES Transactions on Electrical Machines and Systems Pub Date : 2026-06-01 Epub Date: 2026-07-03 DOI: 10.30941/CESTEMS.2026.00019

Jingxiong He;Zhenzhong Su;Qi Liu;Dingyang Liu;Haoran Zhao;Dong Wang

{"title":"Dynamic Mechanism and Active Suppression of Rotor Beat Frequency Vibration in a Magnetic Levitation Induction Machine","authors":"Jingxiong He;Zhenzhong Su;Qi Liu;Dingyang Liu;Haoran Zhao;Dong Wang","doi":"10.30941/CESTEMS.2026.00019","DOIUrl":"https://doi.org/10.30941/CESTEMS.2026.00019","url":null,"abstract":"This study focuses on the phenomenon of rotor beat frequency vibration (BFV) in a 2-pole magnetic levitation induction machine (MLIM), systematically investigating its dynamic mechanisms and subsequently applying an established method for its suppression. First, the BFV synthesis process is described. Subsequently, three primary disturbance sources in the magnetic bearing (MB) system are identified and analyzed, including rotor unbalance, unbalanced magnetic pull (UMP) and magnetostrictive effect. Through numerical solution of a four-degree-of-freedom (4-DOF) rotor dynamic model, the theoretical analysis reveals that MLIM -induced BFV consists of three spectral components: (i) rotor rotational frequency (RRF), (ii) electrical fundamental frequency (EFF), and (iii) the sum of EFF and slip frequency (EFF+SF). Building on these findings, we propose the adoption of a well-established notch filtering technique as an effective means to suppress the BFV. The experimental results confirm the correctness of the analysis of the BFV generation mechanism, and in particular of the EFF disturbance mechanism, and also demonstrate the effectiveness of the vibration suppression method.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":"10 2","pages":"121-132"},"PeriodicalIF":0.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11595048","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148442941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Overview of Coordinated Control Strategies of Wind Farm Integrated MMC-HVDC 风电场MMC-HVDC一体化协调控制策略综述

CES Transactions on Electrical Machines and Systems Pub Date : 2026-06-01 Epub Date: 2026-06-02 DOI: 10.30941/CESTEMS.2026.00015

Jingyi Zhang;Huiru Yang;Zhen Tian;Meng Huang;Pan Feng;Fei Liu;Zhe Chen;Ruanming Huang;Xiaoming Zha

{"title":"Overview of Coordinated Control Strategies of Wind Farm Integrated MMC-HVDC","authors":"Jingyi Zhang;Huiru Yang;Zhen Tian;Meng Huang;Pan Feng;Fei Liu;Zhe Chen;Ruanming Huang;Xiaoming Zha","doi":"10.30941/CESTEMS.2026.00015","DOIUrl":"https://doi.org/10.30941/CESTEMS.2026.00015","url":null,"abstract":"With the development of onshore power grid projects in desert, Gobi and desertified regions as well as offshore wind power projects, electric energy requires long-distance transmission due to insufficient local consumption. Modular multilevel converter based high-voltage direct current (MMC-HVDC) has become the mainstream transmission technology for large-scale remote wind farm integration. However, MMC-HVDC electrically decouples wind farms from the main grid, and its interaction with wind farms can trigger various oscillations. In addition, the MM C- HVDC connected wind farm system differs from single-converter grid-connected systems in structure, equipment complexity, and fault evolution, leading to problems such as low inertia, wideband oscillations and poor fault ride-through. To address these issues, coordinated control strategies considering dynamic interactions between wind farms and MMC-HVDC have been widely studied. This paper thus reviews such coordinated control strategies from three aspects: first, introducing common engineering symmetrical monopole/bipolar MMC-HVDC system structures; second, summarizing grid frequency sensing methods and inertia support control strategies for MMC-HVDC and wind farms; third, discussing coordinated oscillation suppression and fault ride-through control strategies, considering direct current (DC)-side faults, alternating current (AC)-side grid faults, and wind farm area faults. Finally, it summarizes deficiencies of existing studies for each challenge and prospects future research directions for MMC-HVDC connected wind farm systems.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":"10 2","pages":"240-256"},"PeriodicalIF":0.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11548520","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148442212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Permeance-Harmonic-Oriented Design and Optimization of a Field-Modulated PM Hub Motor for High Torque Density 面向磁导谐波的高转矩密度场调制永磁轮毂电机设计与优化

CES Transactions on Electrical Machines and Systems Pub Date : 2026-06-01 Epub Date: 2026-07-03 DOI: 10.30941/CESTEMS.2026.00020

Yuting Zhou;Zixuan Xiang;Xiaoyong Zhu;Qian Liu;Deyang Fan;Kunhua Chen

{"title":"Permeance-Harmonic-Oriented Design and Optimization of a Field-Modulated PM Hub Motor for High Torque Density","authors":"Yuting Zhou;Zixuan Xiang;Xiaoyong Zhu;Qian Liu;Deyang Fan;Kunhua Chen","doi":"10.30941/CESTEMS.2026.00020","DOIUrl":"https://doi.org/10.30941/CESTEMS.2026.00020","url":null,"abstract":"This paper investigates an aggregated design and optimization method for permanent magnet hub (PMH) motors, guided by permeance harmonics, to meet low-speed, high-torque requirements. The key lies in establishing the correlation between stator and rotor permeance harmonics and torque. Firstly, contribution equations describing the influence of stator and rotor permeance harmonics on torque are derived. It reveals that the contribution degree is affected by harmonic amplitude and phase. Then, the selection criteria for stator and rotor topology are formulated. The amplitude and phase characteristics of the permeance harmonic group are considered in criteria, which aim to achieve the aggregated design from a permeance harmonic perspective. Furthermore, based on the identified aggregated permeance harmonics, the airgap flux density harmonics directly linked to permeance harmonics are determined. Taking these harmonics as the goal, they are involved in the optimization process for high torque density. Sensitivity analysis and response surface analysis are adopted, respectively, to lock the design variables and their parameter ranges. Then, the motor topology with characteristics of high torque density is obtained through multi-objective optimization. Finally, a prototype experiment is conducted on the optimized PMH motor.","PeriodicalId":100229,"journal":{"name":"CES Transactions on Electrical Machines and Systems","volume":"10 2","pages":"176-187"},"PeriodicalIF":0.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11595079","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148442351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0