{"title":"Review and Analysis of Voltage Clamping Circuits With Low Overvoltage Ratios for DC Circuit Breakers","authors":"Shuyan Zhao;Chunmeng Xu;Lakshmi Ravi;Zhou Dong;Pietro Cairoli","doi":"10.1109/OJIES.2024.3420219","DOIUrl":"10.1109/OJIES.2024.3420219","url":null,"abstract":"Voltage clamping circuits are critical components in most direct-current circuit breakers (dcCBs) to achieve ultrafast dc fault interruptions and an extended lifetime. A key performance index of voltage clamping circuits is the overvoltage ratio, which calculates the peak switching overvoltage over the nominal voltage during fault interruption processes. A lower overvoltage ratio is beneficial to minimize the dcCB insulation voltage and reduce the total breaker cost, meanwhile alleviating the overvoltage interference to the dc bus and, thus, enhancing the stability of the dc power system. This article evaluates the overvoltage ratio of various clamping circuits reported in dcCB literature. The basic working principles, switching overvoltage magnitude, advantages, and limitations of different voltage clamping circuits are evaluated by circuit simulations. A capacitor-metal–oxide varistor (C-MOV) circuit is selected for experimental validation considering its specifically low overvoltage ratio. The C-MOV prototype is verified with high-power tests at 1 kV dc bus. The measured overvoltage ratio of the C-MOV prototype matches parametric analyses. The effects of stray inductance and fault rise rate on the overvoltage ratio are also experimentally validated. Finally, the C-MOV circuit is compared with other voltage clamping circuits in the literature to demonstrate its benefits and limitations in dcCB applications.","PeriodicalId":52675,"journal":{"name":"IEEE Open Journal of the Industrial Electronics Society","volume":"5 ","pages":"651-662"},"PeriodicalIF":5.2,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10577240","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141500731","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}
FERNANDO A. CHICAIZA;EMANUEL SLAWIñSKI;VICENTE MUT
{"title":"Delayed Bilateral Teleoperation of Mobile Manipulators With Hybrid Mapping: Rate/Nonlinear-Position Modes","authors":"FERNANDO A. CHICAIZA;EMANUEL SLAWIñSKI;VICENTE MUT","doi":"10.1109/OJIES.2024.3419422","DOIUrl":"10.1109/OJIES.2024.3419422","url":null,"abstract":"Mobile manipulators find versatile applications across various fields, leveraging the combination of autonomous functionalities and bilateral teleoperation schemes to enhance the effectiveness of these robotic mechanisms. Regarding teleoperation, command generation involves a leader robot with a few degrees of freedom in a bounded workspace, accompanied by a redundant follower robot operating in an unbounded workspace. This article introduces the concept of Cartesian/articular control for delayed bilateral teleoperation of a mobile manipulator, where the follower robot aims to execute the rate/nonlinear-position commands issued by a human handling the leader robot through a proposed hybrid mapping. We implement a P+d controller applied in Cartesian space for the leader while a controller based on inverse kinematics in joint space is employed for the follower, taking advantage of its redundancy. We then propose a Lyapunov–Krasovskii candidate function to analyze theoretically and numerically the time derivative of the functional on the system trajectories. As a result, we derive the conditions that the proposed hybrid mapping and controller parameters must satisfy to ensure bounded errors. Finally, we statistically evaluated objective metrics from multiple pick-and-place task executions considering time delays to quantify the performance achieved.","PeriodicalId":52675,"journal":{"name":"IEEE Open Journal of the Industrial Electronics Society","volume":"5 ","pages":"663-681"},"PeriodicalIF":5.2,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10572222","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141500734","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}
{"title":"Pole-to-Pole Short-Circuit Categorization for Protection Strategies in Primary Shipboard DC Systems","authors":"Alejandro Latorre;Thiago Batista Soeiro;Xinqian Fan;Rinze Geertsma;Marjan Popov;Henk Polinder","doi":"10.1109/OJIES.2024.3417939","DOIUrl":"https://doi.org/10.1109/OJIES.2024.3417939","url":null,"abstract":"The protection of dc systems in mobility applications, such as land transport, aircraft, and shipping, presents significant challenges due to the need for high-power-density equipment in confined spaces. This article focuses on dc systems onboard ships, for which diverse applications require different power levels, architectures, and protection strategies. Existing protection frameworks and regulations are often inadequate or outdated for the field, leading to certification issues and insufficient fault analysis. This research proposes a use-case-based categorization of short-circuit currents for primary systems. A reference scenario is created using a simulation model of a 5-MW system in a superyacht to provide a short-circuit inventory. The study proposes three contributions: a comprehensive fault inventory, a qualitative categorization, and relevant recommendations for power converter design. The research highlights the importance of fault categorization in understanding the impact of various short circuits on shipboard dc systems. The study emphasizes the importance of the evolution of materials and power converters in developing efficient protection technologies for ships. This work addresses some fundamental gaps in shipboard dc systems, providing a foundation for improved protection strategies and regulations, ultimately contributing to the advancement of protection of shipboard dc systems.","PeriodicalId":52675,"journal":{"name":"IEEE Open Journal of the Industrial Electronics Society","volume":"5 ","pages":"596-615"},"PeriodicalIF":5.2,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10569074","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141500308","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}
{"title":"Mixed Redundancy Strategy for Modular Multilevel Converters in High-Power Applications","authors":"Miad Ahmadi;Aditya Shekhar;Pavol Bauer","doi":"10.1109/OJIES.2024.3415007","DOIUrl":"https://doi.org/10.1109/OJIES.2024.3415007","url":null,"abstract":"Modular multilevel converters are favorable for efficiently operating high-power usages. The required number of components significantly increases when higher modularity is introduced for the given voltage level, thus reducing the system's reliability. This article suggests a mixed redundancy strategy (MRS) that combines the operational concepts using active and spare redundant submodules. It is shown that more than 50% higher B10 lifetime (the point in time when the system has a 90% probability of survival) is achievable as compared to reliability improvement using fixed-level active redundancy strategy, load-sharing active redundancy strategy, and standby redundancy strategy with the same number of redundant submodules. The tradeoff between operational efficiency and investment cost is explored to define the boundary for selecting the MRS over other redundancy strategies with varying dc-link voltages and average converter loading, considering a ten-year payback period and equivalent B10 lifetime. The change in viability boundary for the MRS is established with increasing B10 lifetime and its sensitivity to power electronic component costs and assumed failure rate. The effect of power capacity with a higher switch current rating is evaluated. Also, the Monte Carlo simulation methodology is proposed to evaluate the practicality and effectiveness of the proposed MRS scheme. Finally, the insights of this study are applied to existing literature.","PeriodicalId":52675,"journal":{"name":"IEEE Open Journal of the Industrial Electronics Society","volume":"5 ","pages":"535-546"},"PeriodicalIF":5.2,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10570455","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141448035","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}
{"title":"Optimal Robust Time-Domain Feature-Based Bearing Fault and Stator Fault Diagnosis","authors":"G. Geetha;P. Geethanjali","doi":"10.1109/OJIES.2024.3417401","DOIUrl":"https://doi.org/10.1109/OJIES.2024.3417401","url":null,"abstract":"In machine learning, the extraction of features is necessary for intelligent motor fault diagnosis. In industrial applications, it is necessary to identify the optimal number of features to differentiate various types of fault characteristics with less computational complexity and cost. However, motor fault diagnosis for real-time applications has challenges in capturing characteristics due to variations in speed, load, force, run-to-failure state as well as the type of the motor and its parts. The deep learning techniques that automatically extract features and perform classification have algorithmic complexity. In this work, the authors address these challenges by: 1) selecting and ensembling optimal time-domain features that are capable of identifying motor faults using current signals of the permanent magnet synchronous motor (PMSM) in bearing; and 2) investigating the feature ensemble constituting optimal features for robust fault diagnosis in the PMSM bearing as well as the stator and bearing of squirrel cage induction motor (SCIM) for various conditions. The optimal features mean absolute value, simple sign integral, and waveform length yields 99.8% and 100% for bearing fault and stator fault diagnosis, respectively, in PMSM. These features show 100% accuracy for identification of fault in SCIM and 98.2% accuracy in the run-to-failure state.","PeriodicalId":52675,"journal":{"name":"IEEE Open Journal of the Industrial Electronics Society","volume":"5 ","pages":"562-574"},"PeriodicalIF":5.2,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10568251","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141500307","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}
{"title":"Synthesis and Comparison of Soft-Switched Operating Modes of a Series Resonant Balancing Converter for Bipolar DC Grids","authors":"Sachin Yadav;Pavol Bauer;Zian Qin","doi":"10.1109/OJIES.2024.3412990","DOIUrl":"https://doi.org/10.1109/OJIES.2024.3412990","url":null,"abstract":"This article discusses the various operating modes of a series resonant balancing converter for bipolar dc grids. It is shown that the converter can be operated in both the capacitive and inductive regions with respect to the resonant frequency of the \u0000<italic>LC</i>\u0000 tank. Furthermore, concerning the pulse width modulation signals to the switches, the converter can either be operated by controlling the phase shift between the converter half bridge legs or the duty cycle of the half bridges. A qualitative comparison of the different modes proves that a) the phase shift modes have better soft switching capabilities, b) the capacitive phase shift mode can show zero voltage switching at switch turn-\u0000<sc>on</small>\u0000 in the whole operating range, c) the losses in case of capacitive phase shift mode shows best performance at low load power, d) the inductive region power modes show lower rms current for the same power flow compared with capacitive region modes which lead to lower losses at higher output power. The simulation and experimental results depict the operation of all the modes. Finally, a prototype is designed to validate all operating modes, demonstrating \u0000<inline-formula><tex-math>$>$</tex-math></inline-formula>\u000099% system efficiency at 1.75 kW.","PeriodicalId":52675,"journal":{"name":"IEEE Open Journal of the Industrial Electronics Society","volume":"5 ","pages":"547-561"},"PeriodicalIF":5.2,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10565810","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141474897","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}
Martin Stefan Baumann;Andreas Steinboeck;Wolfgang Kemmetmüller;Andreas Kugi
{"title":"Real-Time Capable Thermal Model of an Automotive Permanent Magnet Synchronous Machine","authors":"Martin Stefan Baumann;Andreas Steinboeck;Wolfgang Kemmetmüller;Andreas Kugi","doi":"10.1109/OJIES.2024.3413331","DOIUrl":"https://doi.org/10.1109/OJIES.2024.3413331","url":null,"abstract":"Excessive temperatures can lead to accelerated aging and irreversible damage in electric machines. Therefore, real-time temperature monitoring is vital for highly utilized electric machines in automotive drives to ensure that temperatures are within safe operating limits during operation. Installing temperature sensors on all critical parts would incur too much cost. Hence, model-based real-time temperature monitoring is a preferred solution. Recent publications typically utilize low-dimensional lumped-parameter thermal networks. This article presents a modeling method for a permanent magnet synchronous machine (PMSM), where the thermal model is derived using the finite-volume method. The model is calibrated with measurement data. A model-order reduction method is applied, which significantly reduces the computational costs of the model while preserving important (uncertain) parameters, such as heat transfer coefficients. Experimental results for different load cycles of the considered machine validate the feasibility and accuracy of the proposed model. Finally, comparing the model with measured temperatures at positions not used for calibration shows that the proposed method accurately captures the temperature distribution in the whole machine without changing the model structure.","PeriodicalId":52675,"journal":{"name":"IEEE Open Journal of the Industrial Electronics Society","volume":"5 ","pages":"501-516"},"PeriodicalIF":5.2,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10555127","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141435442","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}
{"title":"Formal Verification of Nonfunctional Requirements of Overall Instrumentation and Control Architectures","authors":"Polina Ovsiannikova;Antti Pakonen;Dmitry Muromsky;Maksim Kobzev;Viktor Dubinin;Valeriy Vyatkin","doi":"10.1109/OJIES.2024.3413568","DOIUrl":"https://doi.org/10.1109/OJIES.2024.3413568","url":null,"abstract":"The design of safety-critical cyber–physical systems requires a rigorous check of their operation logic, as well as an analysis of their overall instrumentation and control (I&C) architectures. In this article, we focus on the latter and use formal verification methods to reason about the correctness of an I&C architecture represented with an ontology, using the example of a nuclear power plant design. A safe nuclear power plant must comply with the defense-in-depth principle, which introduces constraints on the physical and functional components of the I&C systems it consists of. This work presents a method for designing nonfunctional requirements using function block diagrams, its definition using logical programming, and demonstrates its implementation in a graphical tool, FBQL. The tool takes as input an ontology representing the I&C architecture to be checked and allows visual design of complex nonfunctional requirements as well as explanation of the results of the checks.","PeriodicalId":52675,"journal":{"name":"IEEE Open Journal of the Industrial Electronics Society","volume":"5 ","pages":"616-631"},"PeriodicalIF":5.2,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10555152","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141500259","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}
{"title":"The Relevance of Large Language Models for Project Management","authors":"Stamatis Karnouskos","doi":"10.1109/OJIES.2024.3412222","DOIUrl":"10.1109/OJIES.2024.3412222","url":null,"abstract":"The rise of artificial intelligence, particularly the emergence of large language models (LLMs) like ChatGPT, continuously reveals numerous advantages across various domains. However, the area of project management has not yet been sufficiently explored. This study fills the research gap by conducting an empirical evaluation of three well-known LLMs: OpenAI's ChatGPT-3.5 and ChatGPT-4, as well as Google's Bard. The evaluation involves subjecting these LLMs to tests designed to prepare professionals for project management certification by the Project Management Institute. The findings cast a positive light on all three LLMs, with each model achieving scores exceeding 82%. Key insights acquired include: LLMs demonstrate the ability to effectively answer project management certification exam questions; LLMs and project managers should be viewed as a dynamic and complementary partnership; and project management certification should evolve to include an assessment of how project managers collaborate with LLMs to enhance project management.","PeriodicalId":52675,"journal":{"name":"IEEE Open Journal of the Industrial Electronics Society","volume":"5 ","pages":"758-768"},"PeriodicalIF":5.2,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10553643","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141940427","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}
{"title":"Lower Extremity Exoskeleton for Human Spinal Cord Injury: A Comprehensive Review","authors":"Tianci Wang;Zaixin Song;Hao Wen;Chunhua Liu","doi":"10.1109/OJIES.2024.3412809","DOIUrl":"https://doi.org/10.1109/OJIES.2024.3412809","url":null,"abstract":"Locomotion disorder caused by spinal cord injury (SCI) leads to a considerably decreased quality of people's lives. Although there are no known cure methods for SCI, a lower extremity exoskeleton (LEE) has a perspective to restore the locomotion ability of SCI patients. Statistics show that the number of published articles on LEEs has exponentially increased over the past 20 years; however, no reviews have been conducted to summarize these studies comprehensively. To fill up this open gap, a comprehensive review from engineering to clinical standpoint is carried out, which is based on the preferred reporting items for systematic reviews and meta-analyses’ methods, including their structural designs, drive forms, control methods, and clinical assessments. A systematic discussion among them is performed while considering the main scientific and technical aspects. The analysis indicates that the actuator configuration, motor selection, state transition, trajectory tracking, transparency implementation, and clinical factor design in exoskeleton development are full of challenges, which should be investigated in more technical efforts in the future.","PeriodicalId":52675,"journal":{"name":"IEEE Open Journal of the Industrial Electronics Society","volume":"5 ","pages":"575-595"},"PeriodicalIF":5.2,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10552905","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141500219","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}