Article
Engineering, Electrical & Electronic
Qianfan Zhang, Meng Shao, Zhen Wei, Han Guang
Summary: This article proposes a filter inductance model for integrated on-board battery chargers using permanent magnet synchronous machines (PMSMs) during the dynamic charging process. The model is used to evaluate grid current ripple and current symmetry, optimize PMSM performance, and meet charging standards.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Automation & Control Systems
Jing Ou, Yingzhen Liu, Martin Doppelbauer
Summary: Surface-mounted permanent-magnet (PM) rotors are often used due to high mechanical strength, but suffer from high eddy current losses at high speeds; interior PM rotors can avoid sleeves but have lower mechanical strength; this study uses high mechanical strength materials and carbon-fiber sleeves to improve the performance of interior PM and surface-mounted PM rotors.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Ismaele Diego De Martin, Dario Pasqualotto, Fabio Tinazzi
Summary: This article discusses the theory of a new analytical-solution-based algorithm for calculating the optimal solution with hexagonal constraints in model-predictive control applications. The proposed method targets three-phase voltage-source inverters for power electronic and electric motor drive applications. The algorithm provides a computationally efficient way to calculate the optimal solution in an analytical manner when the control horizon is limited to the first step.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Energy & Fuels
Yong Kong, Da Xu, Mingyao Lin
Summary: This paper presents an analysis and comparison of the loss and efficiency characteristics between Surface Permanent Magnet (SPM) and Interior Permanent Magnet (IPM) Machines. An analytic model is created to calculate the airgap flux density and torque, and the loss functions are derived based on key design parameters. The relationship between the design parameters and efficiency characteristic is investigated, and the efficiency under different driving cycles is calculated and compared. The proposed method and analysis are validated through a comparison with Finite Elements Analysis (FEA) and testing on a prototype.
Article
Energy & Fuels
Jianping Wang, Jian Ma, Xuan Zhao, Dean Meng, Kejie Xu, Dianxiang Guo
Summary: Along with the advancement of modern control technology, electric vehicles have gradually become the leading force in the development of the automobile industry. Interior permanent magnet synchronous motors (IPMSMs) have become a mainstream electric vehicle drive component due to their high power density and excellent controllability. This study proposes a composite sensorless control strategy for IPMSMs, employing pulse high-frequency voltage injection and an improved sliding mode observer (SMO) to achieve sensorless control in both the low-speed and medium-high-speed sections of the motor. The study also introduces an improved SMO using a segmented composite function to improve system robustness, and validates the accuracy of the sensorless control technology through a rapid control prototype.
Article
Engineering, Electrical & Electronic
Dongdong Zhang, Hanquan Zhang, Xiang Li, Haisen Zhao, Yanli Zhang, Shuyao Wang, Tanveer Ahmad, Tianhao Liu, Feng Shuang, Thomas Wu
Summary: This paper proposes an electric vehicle motor control strategy based on improved sliding mode and proportional resonance theory, which can improve the dynamic performance of the permanent magnet synchronous motor (PMSM) under the interference and parameter variations. The strategy effectively enhances the robustness and anti-interference performance of the PMSM system for electric vehicles (EVs).
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2023)
Article
Engineering, Multidisciplinary
Young-Hoon Jung, Min-Ro Park, Ki-O Kim, Jun-Woo Chin, Jung-Pyo Hong, Myung-Seop Lim
Summary: This article presents a design method for a high-speed multilayer interior permanent magnet synchronous motor, taking into account mechanical stability and irreversible demagnetization of the PM. The proposed method considers these issues at all design steps using finite-element analysis. Experimental verification was conducted to validate the design method.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Jialei Gu, Wei Hua, Wenfei Yu, Zhiheng Zhang, Hengliang Zhang
Summary: This article uses surrogate models to optimize large-scale high-speed electrical machines, reducing the computational burden caused by the finite element method. Four different surrogate models, including multilayer perceptron, support vector regression, generalized regression neural network, and Kriging model, are developed and compared using cross-validation. The results show that multilayer perceptron, support vector regression, and Kriging model greatly improve the effectiveness and accuracy of design optimization, while generalized regression neural network is not suitable for this specific optimization scenario.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2023)
Article
Automation & Control Systems
Alessandro Acquaviva, Stefan Skoog, Torbjorn Thiringer
Summary: This article presents a solution for in-slot and in-stator direct oil cooling for a tooth coil winding machine, and designs, manufactures, and verifies a corresponding 50-kW machine. Heat transfer simulations and finite-element analysis are used in the design process to establish a continuous operating point at 25 A/mm(2).
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Energy & Fuels
Denis Kotin, Ilya Ivanov, Sofya Shtukkert
Summary: This paper explores the possibility of using synchronous generators with magnetoelectric excitation for autonomous consumers' supply with renewable energy sources. Modified multi-winding synchronous generators with permanent magnets are proposed to address the difficulties in energy-efficient regulation. Different types of generators are presented to simplify architecture design and increase energy generation.
Article
Engineering, Electrical & Electronic
Mohamad Alzayed, Hicham Chaoui
Summary: This paper presents a simplified sensorless dynamic direct voltage MTPA strategy for interior permanent magnet synchronous motors (IPMSMs) in electric vehicle applications, achieving high energy efficiency and maintaining it during transient periods.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2022)
Article
Energy & Fuels
Rukmi Dutta, Alireza Pouramin, Muhammed F. Rahman
Summary: This article presents a multiobjective design optimization study of FSCW PMSM, achieving the goals of maximum efficiency, minimum cost, and wide CPSR with the novel Y-type interior permanent magnet rotor topology. Experimental tests show that the proposed Y-type outperforms both V and spoke-type configurations, meeting many of the Freeedomcar 2020 targets for application in electric vehicles.
IEEE TRANSACTIONS ON ENERGY CONVERSION
(2021)
Article
Automation & Control Systems
Ye Liu, Kang Ma, Huamin Gao, Zhuoran Zhang
Summary: This article investigates the utilization of a consequent-pole (CP) rotor design in the interior permanent magnet (IPM) motor to enhance the permanent magnet (PM) utilization ratio material and reduce leakage flux. The proposed design utilizes a strong flux-focusing effect to improve performance. The optimization process using a multiobjective genetic algorithm achieves a higher PM material utilization and reduced torque ripple.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Engineering, Multidisciplinary
Hui Yang, Cheng Qian, Weijia Wang, Heyun Lin, Zi-qiang Zhu, Shuangxia Niu, Wei Liu, Shukang Lyu
Summary: This article proposes a novel asymmetric-magnetic-pole interior permanent magnet (AMP-IPM) machine which utilizes the concept of asymmetric-magnetic-pole to achieve a magnet-axis-shifting effect and improve torque performance. The design is characterized by a combination of dual-layer reluctance and flat-type PM rotor structures.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Yongsheng Ge, Hui Yang, Weijia Wang, Heyun Lin, Ya Li
Summary: This paper proposes a novel interior permanent magnet (IPM) machine with asymmetrical PM configuration, which can achieve higher torque capability through magnet axis shifted (MAS) effect. The design parameters are optimized to improve torque capability and the effect of the PM asymmetry ratio on torque performance is evaluated.
WORLD ELECTRIC VEHICLE JOURNAL
(2021)
Article
Energy & Fuels
Patrik Ollas, Torbjorn Thiringer, Huijuan Chen, Caroline Markusson
Summary: This study models the performance of a DC distribution system in a single-family residential building and compares it with a conventional AC system, showing that the DC system reduces system losses and increases PV utilization, resulting in efficiency gains. The geographical location has some impact on system performance and PV utilization, but grid interaction is crucial for the performance of the DC topology.
PROGRESS IN PHOTOVOLTAICS
(2021)
Article
Energy & Fuels
Manuel Kuder, Anton Kersten, Jose-Luis Marques-Lopez, Julian Estaller, Johannes Buberger, Florian Schwitzgebel, Torbjoern Thiringer, Anton Lesnicar, Rainer Marquardt, Thomas Weyh, Richard Eckerle
Summary: This paper presents a novel capacitor voltage balancing control approach for cascaded multilevel inverters, which can achieve sensorless control.
Article
Energy & Fuels
Mohammad Kharezy, Hassan Reza Mirzaei, Torbjorn Thiringer, Yuriy Serdyuk
Summary: This study proposes a compact solution for an energy collection system that reduces the need for offshore platforms and introduces an environmentally friendly HV insulation system using pressboard and biodegradable oil.
Article
Energy & Fuels
Julian Estaller, Anton Kersten, Manuel Kuder, Torbjorn Thiringer, Richard Eckerle, Thomas Weyh
Summary: This article introduces the application of electrical models of battery cells in research and development. Experimental comparisons were made on the impact of different equivalent circuit models on the parameters of lithium-ion battery cells. The study results assist battery system designers and electronic engineers in selecting appropriate battery cells for applications.
Article
Engineering, Electrical & Electronic
Anders Lindskog, Torbjorn Thiringer, Tommie Lindquist
Summary: This article introduces a data-driven method for monitoring CVT capacitor punctures. This method improves transmission system stability, prevents equipment damage, reduces personnel risk, and corrects errors in energy measurement systems. The Swedish National Grid has successfully detected old punctures and expects to prevent future capacitor punctures using this method.
IEEE TRANSACTIONS ON POWER DELIVERY
(2022)
Article
Green & Sustainable Science & Technology
Johannes Buberger, Anton Kersten, Manuel Kuder, Richard Eckerle, Thomas Weyh, Torbjoern Thiringer
Summary: This paper compares the total life-cycle greenhouse gas emissions of commercially available passenger cars with different powertrains and energy sources. The results show that conventional gasoline and diesel vehicles emit the highest amount of emissions, while vehicles powered by green electricity, biogas, and fuel cells can significantly reduce emissions.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Engineering, Electrical & Electronic
Zeyang Geng, Torbjorn Thiringer, Matthew J. Lacey
Summary: This article presents a pioneering study on characterizing the aging behavior of commercial lithium-ion batteries using the intermittent current interruption method. This method is highly resource-efficient and can track the battery's resistive and diffusive behaviors, determining aging throughout its lifetime. Furthermore, it enables incremental capacity analysis with the same dataset, providing measurement results comparable to electrochemical impedance spectroscopy. The method does not require advanced test equipment and can extract usable parameters with a 0.1-Hz sampling frequency by prolonging the interruption length. Therefore, it has the potential to be easily implemented for aging diagnostics in electric vehicles or stationary storage batteries.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2022)
Article
Engineering, Environmental
Rickard Arvidsson, Mudit Chordia, Anders Nordelof
Summary: This study focuses on the human health impacts of lithium-ion batteries (LIBs) and quantifies their potential life-cycle health impacts. The study finds that emissions from production processes and occupational accidents have a greater impact than mining accidents. The study suggests reducing these health impacts through material substitution, emission reduction, and improved occupational standards.
INTERNATIONAL JOURNAL OF LIFE CYCLE ASSESSMENT
(2022)
Correction
Engineering, Environmental
Mudit Chordia, Anders Nordelof, Linda Ager-Wick Ellingsen
INTERNATIONAL JOURNAL OF LIFE CYCLE ASSESSMENT
(2022)
Article
Energy & Fuels
Evelina Wikner, Raik Orbay, Sara Fogelstrom, Torbjorn Thiringer
Summary: This article analyzes and categorizes the driving behavior differences between male and female drivers based on GPS-recorded driving dynamics data. The study also investigates the impact of different driving styles on battery utilization in electric vehicles, highlighting the varying sensitivity of different battery types to aggressive driving.
Article
Environmental Studies
Linda Ager-Wick Ellingsen, Rebecca Jayne Thorne, Julia Wind, Erik Figenbaum, Mia Romare, Anders Nordelof
Summary: This study assesses the environmental performance of battery electric buses (BEBs) with different battery technologies and sizes. The results suggest that the size and range effect on the environmental impact depend on the performance of the battery technology, and a smaller battery size of the same technology is not necessarily environmentally preferable. Additionally, extending the BEB lifetime from 10 to 20 years changes the environmental performance and relative contributions to environmental impact potentials for the various BEB alternatives.
TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT
(2022)
Article
Energy & Fuels
Patrik Ollas, Torbjorn Thiringer, Mattias Persson, Caroline Markusson
Summary: This study compares AC and DC distribution systems for a residential building equipped with solar PV generation and battery storage. Based on measured data from a residential building in Sweden, the research evaluates the annual losses, PV utilization, and energy savings of both systems. The results show that DC distribution, combined with PV generation and battery storage, offers significant loss savings due to lower conversion losses compared to AC systems. The analysis considers load-dependent efficiency characteristics and demonstrates the impact of adding different sizes of PV and battery storage on system losses.
Article
Energy & Fuels
Babak Khanzadeh, Torbjoern Thiringer, Mohammad Kharezy
Summary: This paper proposes deriving analytical formulas to estimate the desired leakage inductance for the efficient operation of a dual active bridge (DAB) dc-dc converter. The accuracy and sensitivity of the analytical solutions are evaluated and compared to optimization results. It is shown that the analytical solutions have less than 3% error compared to the optimization engine, highlighting the importance of selecting the correct leakage inductance for optimal converter performance.
Article
Engineering, Multidisciplinary
Babak Khanzadeh, Torbjorn Thiringer, Yuriy V. Serdyuk
Summary: This article presents control strategies to improve the performance of a 3-phase Delta Y-connected dual-active-bridge (DAB) dc-dc converter at partial loads. By adjusting the duration of the zero-level voltage on the Y-side and externally controlling the Delta-side dc-link voltage, the RMS current can be significantly reduced and the turn-on and turn-off currents of the switches can be lowered. Combining the reduction in Delta-side dc-link voltage with Y-side duty cycle variation can lead to considerable performance improvements.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Babak Khanzadeh, Torbjorn Thiringer
Summary: This article provides closed-form equations for the zero-voltage switching boundaries of an M-level-to-N-level DAB converter. It also considers the effects of different winding configurations of the medium frequency transformer and provides simplified ZVS boundaries. The derived models are validated with MATLAB simulations and experiments.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)