Pub Date : 1997-05-18DOI: 10.1109/IEMDC.1997.604139
A. Geri, G. Veca, A. Salvini
In this paper, the authors apply their lumped parameter model in order to simulate the behaviour of MHD generators. In particular they evaluate the performance of these devices taking into account the nonuniform distribution of the main physical quantities that affect the energy conversion (i.e. temperature, pressure, magnetic field and so on). In addition, the connection of MHD generators to high voltage AC lines is also analysed. The results of all simulations executed are shown and discussed.
{"title":"Performance evaluation of MHD generators: applications","authors":"A. Geri, G. Veca, A. Salvini","doi":"10.1109/IEMDC.1997.604139","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604139","url":null,"abstract":"In this paper, the authors apply their lumped parameter model in order to simulate the behaviour of MHD generators. In particular they evaluate the performance of these devices taking into account the nonuniform distribution of the main physical quantities that affect the energy conversion (i.e. temperature, pressure, magnetic field and so on). In addition, the connection of MHD generators to high voltage AC lines is also analysed. The results of all simulations executed are shown and discussed.","PeriodicalId":176640,"journal":{"name":"1997 IEEE International Electric Machines and Drives Conference Record","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115179920","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}
Pub Date : 1997-05-18DOI: 10.1109/IEMDC.1997.604326
K. Shi, T. Chan, Y. K. Wong
This paper describes a generalized simulation model of the three-phase induction motor using the SIMULINK software package of MATLAB. The model is based on two-axis theory of revolving frame transformation. The model takes power source and load torque as inputs and gives speed and electromagnetic torque as outputs. Internal resistance of the power supply and magnetic saturation of the motor may also be accounted for.
{"title":"Modelling of the three-phase induction motor using SIMULINK","authors":"K. Shi, T. Chan, Y. K. Wong","doi":"10.1109/IEMDC.1997.604326","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604326","url":null,"abstract":"This paper describes a generalized simulation model of the three-phase induction motor using the SIMULINK software package of MATLAB. The model is based on two-axis theory of revolving frame transformation. The model takes power source and load torque as inputs and gives speed and electromagnetic torque as outputs. Internal resistance of the power supply and magnetic saturation of the motor may also be accounted for.","PeriodicalId":176640,"journal":{"name":"1997 IEEE International Electric Machines and Drives Conference Record","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121282511","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}
Pub Date : 1997-05-18DOI: 10.1109/IEMDC.1997.604340
P. Zhou, T. Mcdermott, Z. Cendes, M.A. Rahman
A method for the efficient simulation of the steady-state performance of synchronous generators is proposed in this paper. The method is based on an indirect coupling of the finite element method and circuit models and provides the rated excitation requirement, complete load-angle characteristic and dynamic synchronous parameters. The implementation of the whole procedure can be realized conveniently by using commercially available and technically mature finite element packages. An application example is provided to demonstrate the effectiveness of the proposed approach.
{"title":"Steady state analysis of synchronous generators by a coupled field-circuit method","authors":"P. Zhou, T. Mcdermott, Z. Cendes, M.A. Rahman","doi":"10.1109/IEMDC.1997.604340","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604340","url":null,"abstract":"A method for the efficient simulation of the steady-state performance of synchronous generators is proposed in this paper. The method is based on an indirect coupling of the finite element method and circuit models and provides the rated excitation requirement, complete load-angle characteristic and dynamic synchronous parameters. The implementation of the whole procedure can be realized conveniently by using commercially available and technically mature finite element packages. An application example is provided to demonstrate the effectiveness of the proposed approach.","PeriodicalId":176640,"journal":{"name":"1997 IEEE International Electric Machines and Drives Conference Record","volume":"193 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115632182","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}
Pub Date : 1997-05-18DOI: 10.1109/IEMDC.1997.604208
I. Viorel, A. Forrai, R. Ciorba, H. Hedesiu
Much of the recent literature concerning the switched reluctance motor (SRM) is focused on motor performance prediction. In this paper, a mathematical model of an SRM is developed and its steady-state characteristics are computed. The given results, obtained by computer simulation, are shown to verify the proposed model.
{"title":"Switched reluctance motor performance prediction","authors":"I. Viorel, A. Forrai, R. Ciorba, H. Hedesiu","doi":"10.1109/IEMDC.1997.604208","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604208","url":null,"abstract":"Much of the recent literature concerning the switched reluctance motor (SRM) is focused on motor performance prediction. In this paper, a mathematical model of an SRM is developed and its steady-state characteristics are computed. The given results, obtained by computer simulation, are shown to verify the proposed model.","PeriodicalId":176640,"journal":{"name":"1997 IEEE International Electric Machines and Drives Conference Record","volume":"138 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115268572","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}
Pub Date : 1997-05-18DOI: 10.1109/IEMDC.1997.604194
O. Mohammed
Genetic algorithms (GAs) have been successfully applied to the design optimization of electromagnetic devices. In this paper, practical issues relating to the implementation the technique are examined. The possibility of a premature convergence in some applications is studied. Recommendations and guidelines to take these practical implementation issues into consideration are explained through application examples.
{"title":"GA optimization in electric machines","authors":"O. Mohammed","doi":"10.1109/IEMDC.1997.604194","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604194","url":null,"abstract":"Genetic algorithms (GAs) have been successfully applied to the design optimization of electromagnetic devices. In this paper, practical issues relating to the implementation the technique are examined. The possibility of a premature convergence in some applications is studied. Recommendations and guidelines to take these practical implementation issues into consideration are explained through application examples.","PeriodicalId":176640,"journal":{"name":"1997 IEEE International Electric Machines and Drives Conference Record","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123326194","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}
Pub Date : 1997-05-18DOI: 10.1109/IEMDC.1997.604101
G. Le Coat, P. Le Thiec, J. Bongiraud, A. Foggia
This paper presents two methods to measure the electromagnetic signatures of induction machines. Measurements are particularly applied to a bipolar induction motor. First, an experimental study is developed. Then, theoretical computations are presented. The aim was to find a model able to represent properly stray magnetic fields outside the machine in order to reduce the signature.
{"title":"Electromagnetic signature of induction machines","authors":"G. Le Coat, P. Le Thiec, J. Bongiraud, A. Foggia","doi":"10.1109/IEMDC.1997.604101","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604101","url":null,"abstract":"This paper presents two methods to measure the electromagnetic signatures of induction machines. Measurements are particularly applied to a bipolar induction motor. First, an experimental study is developed. Then, theoretical computations are presented. The aim was to find a model able to represent properly stray magnetic fields outside the machine in order to reduce the signature.","PeriodicalId":176640,"journal":{"name":"1997 IEEE International Electric Machines and Drives Conference Record","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124867380","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}
Pub Date : 1997-05-18DOI: 10.1109/IEMDC.1997.604227
A. Moraru
A new half-analytical method is presented for the accurate calculation of the winding ends leakage inductance in rotating electrical machines with wound armatures, based on the integration of Maxwell's magnetic equations in the free space, magnetic images and surface distributions for modelling the effect of the slots and of the air gap. The obtained results agree with those calculated by the traditional methods.
{"title":"Computation of winding ends leakage inductance","authors":"A. Moraru","doi":"10.1109/IEMDC.1997.604227","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604227","url":null,"abstract":"A new half-analytical method is presented for the accurate calculation of the winding ends leakage inductance in rotating electrical machines with wound armatures, based on the integration of Maxwell's magnetic equations in the free space, magnetic images and surface distributions for modelling the effect of the slots and of the air gap. The obtained results agree with those calculated by the traditional methods.","PeriodicalId":176640,"journal":{"name":"1997 IEEE International Electric Machines and Drives Conference Record","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123037258","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}
Pub Date : 1997-05-18DOI: 10.1109/IEMDC.1997.604262
H. Yamashita, V. Cingoski, E. Nakamae, A. Namera, H. Kitamura
This paper deals with design improvements on the graded insulation of power transformers using transient electric field analysis and a visualization technique. The calculation method for transient electric field analysis inside a power transformer impressed with an impulse voltage is presented. Initially, the concentrated electric network for the power transformer is constructed by dividing the transformer windings into several blocks and by computing the electric circuit parameters. Next, a transient electric field analysis is performed. Using the results of the circuit analysis as boundary conditions, a 2-D axisymmetrical electric field finite element analysis is performed. Finally, an animated display technique for the transient voltage, the electric field intensity and the tolerance rate of electric field intensity distributions is proposed as an extremely useful tool for design on graded insulation. A successful application of the proposed method for analysis of a model transformer for which the computed results agree very well with measured results is also presented.
{"title":"Design improvements on graded insulation of power transformers using transient electric field analysis and visualization technique","authors":"H. Yamashita, V. Cingoski, E. Nakamae, A. Namera, H. Kitamura","doi":"10.1109/IEMDC.1997.604262","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604262","url":null,"abstract":"This paper deals with design improvements on the graded insulation of power transformers using transient electric field analysis and a visualization technique. The calculation method for transient electric field analysis inside a power transformer impressed with an impulse voltage is presented. Initially, the concentrated electric network for the power transformer is constructed by dividing the transformer windings into several blocks and by computing the electric circuit parameters. Next, a transient electric field analysis is performed. Using the results of the circuit analysis as boundary conditions, a 2-D axisymmetrical electric field finite element analysis is performed. Finally, an animated display technique for the transient voltage, the electric field intensity and the tolerance rate of electric field intensity distributions is proposed as an extremely useful tool for design on graded insulation. A successful application of the proposed method for analysis of a model transformer for which the computed results agree very well with measured results is also presented.","PeriodicalId":176640,"journal":{"name":"1997 IEEE International Electric Machines and Drives Conference Record","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123958321","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}
Pub Date : 1997-05-18DOI: 10.1109/IEMDC.1997.604339
N. Takahashi
Some new techniques in the analysis and design of electric machines are discussed, namely: the time-periodic analysis of the magnetic field in nonoriented materials, taking into account hysteresis characteristics; 3-D transient analysis of capacitor-discharge impulse magnetizers; and a 3-D optimization method of electric machines considering nonlinearity and eddy currents. The usefulness of these techniques is shown by applying them to actual machines and comparisons with measurement results.
{"title":"Some useful techniques in analysis and design of electric machines","authors":"N. Takahashi","doi":"10.1109/IEMDC.1997.604339","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604339","url":null,"abstract":"Some new techniques in the analysis and design of electric machines are discussed, namely: the time-periodic analysis of the magnetic field in nonoriented materials, taking into account hysteresis characteristics; 3-D transient analysis of capacitor-discharge impulse magnetizers; and a 3-D optimization method of electric machines considering nonlinearity and eddy currents. The usefulness of these techniques is shown by applying them to actual machines and comparisons with measurement results.","PeriodicalId":176640,"journal":{"name":"1997 IEEE International Electric Machines and Drives Conference Record","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124190634","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}
Pub Date : 1997-05-18DOI: 10.1109/IEMDC.1997.604302
H. Liu, Q. Jiang, Q. Hu, E. Zhou
This paper establishes a dq0 mathematical model to simulate the dynamic starting performances of a capacitor starting system. The model takes all the main parts of the capacitor starting system into account for the first time-including the transmission lines, the shunt capacitors and the motor. The model proposed in this paper can therefore be used to analyze capacitor starting systems accurately.
{"title":"Modeling and simulation of the capacitor starting system of large and medium squirrel cage motors on limited capacity transmission lines","authors":"H. Liu, Q. Jiang, Q. Hu, E. Zhou","doi":"10.1109/IEMDC.1997.604302","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604302","url":null,"abstract":"This paper establishes a dq0 mathematical model to simulate the dynamic starting performances of a capacitor starting system. The model takes all the main parts of the capacitor starting system into account for the first time-including the transmission lines, the shunt capacitors and the motor. The model proposed in this paper can therefore be used to analyze capacitor starting systems accurately.","PeriodicalId":176640,"journal":{"name":"1997 IEEE International Electric Machines and Drives Conference Record","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125174418","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}
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