R. Rocca, F. G. Capponi, S. Papadopoulos, G. De Donato, M. Rashed, M. Galea
{"title":"Optimal Advance Angle for Torque Maximisation in High-Speed, Single-Pulse Operated, Switched Reluctance Machines","authors":"R. Rocca, F. G. Capponi, S. Papadopoulos, G. De Donato, M. Rashed, M. Galea","doi":"10.1109/IEMDC.2019.8785350","DOIUrl":"https://doi.org/10.1109/IEMDC.2019.8785350","url":null,"abstract":"It is well reported that Switched Reluctance Machines typically operate in ‘single-pulse mode’ when rotating at high speed. For such operating mode, the control parameters are the duration of the energizing period along with the advance of the turn-on instant, i.e. advance angle. To maximize the output torque, the energizing period is normally kept equal to half of the electric period, i.e. 180°(elec.), whilst the optimal advance angle is evaluated through time consuming finite-element-based optimization algorithms. In this paper, a simple and novel analytical model is proposed that determines the optimal advance angle in a closed-form analytical expression, directly from the machine geometry. Successful validation against accurate finite element models on two Switched Reluctance prototypes is reported.","PeriodicalId":378634,"journal":{"name":"2019 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128243199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Daria Kepsu, R. Jastrzebski, Olli Pvrhönen, E. Kurvinen
{"title":"Scalability of SPM Bearingless High - Speed Motor for 180 – 280 kW Applications","authors":"Daria Kepsu, R. Jastrzebski, Olli Pvrhönen, E. Kurvinen","doi":"10.1109/IEMDC.2019.8785367","DOIUrl":"https://doi.org/10.1109/IEMDC.2019.8785367","url":null,"abstract":"This paper presents the design of the optimization of multi-phase, 25000 rpm 180 – 280 kW SPM bearingless motors. The electromagnetic analysis investigates motor and suspension performance with high-quality silicon and iron-cobalt lamination materials. Structural rigidity of surface and buried permanent magnet motor structures made of said materials are compared. The main challenge in bearingless motor design is achieving high efficiency with possibility to control suspension forces. Motors of the same volume with different stator slot shapes, slot openings, tooth shapes, magnet thicknesses and angles are investigated. The main objectives of optimization are the minimization of torque ripple, force ripple, force error angle and efficiency. The design is optimized in FEM analysis. Power and performance limitations of selected geometries are investigated and discussed.","PeriodicalId":378634,"journal":{"name":"2019 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123442650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Furqani, Candra Adi Wiguna, A. Chiba, Omer Gundogmus, M. Elamin, Y. Sozer
{"title":"Analytical and Experimental Verification of Novel Current Waveforms for Noise Reduction in Switched Reluctance Motor","authors":"J. Furqani, Candra Adi Wiguna, A. Chiba, Omer Gundogmus, M. Elamin, Y. Sozer","doi":"10.1109/IEMDC.2019.8785171","DOIUrl":"https://doi.org/10.1109/IEMDC.2019.8785171","url":null,"abstract":"Acoustic noise reduction is one of the main topics of switched reluctance motor developments. One of the effective methods is flattening three-phase radial force sum. Flattening radial force sum is achieved by optimizing the current profile. Novel current waveforms have been proposed recently for acoustic noise reduction without sacrificing the efficiency in the $18/21$ switched reluctance motor which has competitive power density, torque density, peak efficiency, and outer dimensions compared with the permanent magnet motor employed in hybrid electric vehicles. In this paper, electro-mechanical analysis, acoustic analysis, and the experiments are carried out to verify acoustic noise reduction in the 18/12 switched reluctance motor using novel current waveforms.","PeriodicalId":378634,"journal":{"name":"2019 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116178921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Ayat, Camel Serghine, T. Klonowski, S. Yon, Albert Mutabazi, S. McDaniel
{"title":"The Use of Phase Change Material for the Cooling of Electric Machine Windings Formed with Hollow Conductors","authors":"S. Ayat, Camel Serghine, T. Klonowski, S. Yon, Albert Mutabazi, S. McDaniel","doi":"10.1109/IEMDC.2019.8785181","DOIUrl":"https://doi.org/10.1109/IEMDC.2019.8785181","url":null,"abstract":"A phase change material (PCM) is a substance capable of storing or releasing large amounts of energy typically when melting or solidifying. The use of PCM is promising for the cooling of electric machines with high-load short transient duty, such as aircraft stator generators (S/G). During the starting phase, which lasts a couple of seconds, a substantial amount of heat has to be extracted from the machine windings, while the steady-state operation is less thermally constraining. In order to ensure sufficient cooling capabilities, PCMs should be placed as close as possible to the winding conductors due to their low thermal conductivity. This paper investigates a novel integration approach, where PCMs are placed inside hollow conductors (HCs). Numerical and experimental analyses have been completed on a range of hollow conductors filled with PCMs to gain a first insight into the benefits of this cooling method. Detailed descriptions of the proposed cooling technique have been supplemented with measured data from tests on a hollow conductor exemplar filled with PCM. An illustration of a practical use of the developed method on a helicopter turbine S/G is also presented.","PeriodicalId":378634,"journal":{"name":"2019 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127728633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Neural Network Meta-Modeling and Optimization of Flux Switching Machines","authors":"H. Kurtović, I. Hahn","doi":"10.1109/IEMDC.2019.8785344","DOIUrl":"https://doi.org/10.1109/IEMDC.2019.8785344","url":null,"abstract":"This paper presents the application of neural networks (NN)in the design and optimization of the flux switching machine. A finite element (FE)model of the flux switching machine is used to create data for the training of NNs. The trained NN meta-models are used to predict the properties of machine designs. Subsequently, a preselection from these predictions for further FE calculations is employed. Based on this approach, a generational NN based optimization is implemented. Furthermore, during the optimization many NN topologies and output variable combinations are investigated. The NN predictions and their quality are evaluated according to output variables, generations, and NN layouts. In addition, the improvements in the machine's capabilities are presented using a Pareto-domination based approach.","PeriodicalId":378634,"journal":{"name":"2019 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126377901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Study of Manufacturing Tolerance of Modular Permanent Magnet Machines: Segment Radial Displacement","authors":"B. Ren, G. Li, Z. Zhu, M. Foster, D. Stone","doi":"10.1109/IEMDC.2019.8785073","DOIUrl":"https://doi.org/10.1109/IEMDC.2019.8785073","url":null,"abstract":"In this paper, the investigation about the influence of manufacturing tolerance on the electromagnetic performance of modular PM machines with segmented stator has been carried out. Two typical slot/pole number combinations such as 12-slot/10-pole and 12-slot/14-pole have been chosen for case studies. The manufacturing tolerances scenarios are focused on the radial stator segment displacement. Firstly, the influence on the phase back-EMF as well as the on-load torque is investigated. By doing so, the cases where the influence of manufacturing tolerance are the most significant can be identified. This allows for further studying the influence of flux gap widths on the performance of the modular PM machines. Through the analyses of the back-EMF, the on-load torque, the cogging torque and the unbalanced magnetic force, the manufacturing tolerance withstand capability of the 12-slot/10-pole and 12-slot/14-pole modular PM machines can be assessed. It is found that the 12-slot/10-pole modular PM machines have better manufacturing tolerance withstand capability compared with the 12-slot/14-pole modular PM machines.","PeriodicalId":378634,"journal":{"name":"2019 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133079207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A Novel Flux Modulation Linear Machine with Dual-Sided Modular Primary and Multiple Pole Pitches","authors":"You Zhou, R. Qu, Yuting Gao, Dawei Li, C. Shi","doi":"10.1109/IEMDC.2019.8785417","DOIUrl":"https://doi.org/10.1109/IEMDC.2019.8785417","url":null,"abstract":"This digest proposes a novel flux modulation linear permanent magnet (FMLPM) machine with dual-sided modular primary (DMP) and multiple pole pitches (MPP), suitable for long stroke, high thrust applications. The key of proposed design is that the machine operates in multiple working harmonic mode, which can greatly increase its thrust density without extra PM usage. Moreover, the dual-sided modular primary structure endows the proposed machine with highly balanced three-phase back-EMF, tinny normal force, and a good fault tolerant capability. The detailed information of the configuration and operation principle will be introduced. Besides, the optimization procedure of several key parameters will be carried out to maximize the thrust density of proposed machines. Finally, to verify the superiority of the novel FMLPM machine, it is compared to an FMLPM machine with DMP but without MPP and a conventional FMLPM machine without DMP and MPP. The finite element analysis (FEA) results shows that under the same machine volume, heat loading and PM usage, the proposed FMPM machine can exhibit much larger torque density.","PeriodicalId":378634,"journal":{"name":"2019 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"34 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132286616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Analysis Guideline to Determine Capabilities of IPM Motors for Automotive Application","authors":"G. Berardi, Michele Bonfante, N. Bianchi","doi":"10.1109/IEMDC.2019.8785072","DOIUrl":"https://doi.org/10.1109/IEMDC.2019.8785072","url":null,"abstract":"The performance computation of an Interior Permanent Magnet (IPM) motor designed for an electric vehicle is an interesting engineering problem. Such a machine exhibits very high magnetic and electric loadings, reaching power up to some hundreds kW despite the limited volume. A topic of the recent research is to reach very high power and torque density. Not only the motor performance at rated currents is important, but also that under high overload (intermittent duty). Fast and accurate procedures for the analysis of the IPM motor are required, to predict its capabilities. Some considerations are reported in this paper. As an example an IPM motor is considered, whose size is similar to that of machines used in commercial vehicles. The ambition of this paper is to give a complete guideline for determining the performance of so stressed synchronous PM machines.","PeriodicalId":378634,"journal":{"name":"2019 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124374883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
N. Erdogan, D. Murray, J. Giebhardt, Matthias Wecker, J. Donegan
{"title":"Real-Time Hardware Emulation of a Power Take-Off Model for Grid-Connected Tidal Energy Systems","authors":"N. Erdogan, D. Murray, J. Giebhardt, Matthias Wecker, J. Donegan","doi":"10.1109/IEMDC.2019.8785358","DOIUrl":"https://doi.org/10.1109/IEMDC.2019.8785358","url":null,"abstract":"This paper describes the dynamic models of the complete power take-off system (PTO) for grid-connected tidal energy systems and performs its real-time simulation on a parallel hardware platform. It is aimed at (i) validating the system concept by showing if the operational performance and limits of the PTO meet the requirements set by the turbine, (ii) providing the realtime simulation as a development tool for the control algorithms. It is shown that the presented level of modeling and real-time analysis are a good foundation for a performance assessment of the overall system control prior to any installation of the hydrokinetic turbine.","PeriodicalId":378634,"journal":{"name":"2019 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132086893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synchronized Six-Step Voltage Generation in High-Speed PMSM Drive","authors":"L. Jarzebowicz, Maciej Cisek","doi":"10.1109/IEMDC.2019.8785183","DOIUrl":"https://doi.org/10.1109/IEMDC.2019.8785183","url":null,"abstract":"Synchronized voltage generation has already been considered in the context of pulse width modulation (PWM). References prove that synchronized PWM substantially decreases subharmonics in inverter output voltage when operating with low switching-to-fundamental frequency ratio. This paper identifies problems of unsynchronized voltage generation in electric drives under six-step inverter operation. Guidelines for the synchronization scheme were formulated, considering both minimization of voltage subharmonics and drive control properties. A comprehensive algorithm for adjusting the voltage update rate in six-step permanent magnet synchronous motor (PMSM) drive was presented. Superior properties of the synchronized six-step voltage generation were demonstrated by simulation and experiment for an exemplary 5-kW PMSM drive.","PeriodicalId":378634,"journal":{"name":"2019 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125813595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}