Pub Date : 1997-05-18DOI: 10.1109/IEMDC.1997.604166
A. Benchaib, M. Tadjine, A. Rachid, Abdelhamid Tayebi
This paper presents a self-tuning variable structure observer to estimate the fluxes and the speed of an induction motor. Firstly, assuming that the speed is a known smooth bounded function, a sliding mode observer is designed to estimate the rotor fluxes. Then, using Lyapunov's technique and following the design approach of Kubota et al. (1993), an adaptation law is derived to estimate the unknown speed. Experimental results obtained on a digital signal processor (DSP) TMS320C31/40 MHz-based system are presented to highlight the effectiveness of the proposed technique.
{"title":"Adaptive sliding mode observer for state estimation of an induction motor on DSP-based system","authors":"A. Benchaib, M. Tadjine, A. Rachid, Abdelhamid Tayebi","doi":"10.1109/IEMDC.1997.604166","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604166","url":null,"abstract":"This paper presents a self-tuning variable structure observer to estimate the fluxes and the speed of an induction motor. Firstly, assuming that the speed is a known smooth bounded function, a sliding mode observer is designed to estimate the rotor fluxes. Then, using Lyapunov's technique and following the design approach of Kubota et al. (1993), an adaptation law is derived to estimate the unknown speed. Experimental results obtained on a digital signal processor (DSP) TMS320C31/40 MHz-based system are presented to highlight the effectiveness of the proposed technique.","PeriodicalId":176640,"journal":{"name":"1997 IEEE International Electric Machines and Drives Conference Record","volume":"93 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":"114820679","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.1997.604338
C. Grantham, H. Tabatabaei-Yazdi, M.F. Rahman
The paper describes a novel method for the efficiency evaluation of three-phase induction motors using a synthetic loading technique. The method substantially reduces the testing time and vertically mounted machines can be tested in the same way as horizontal ones, without the need to connect a load to the machine's drive shaft.
{"title":"A novel method for efficiency evaluation of three phase induction motors","authors":"C. Grantham, H. Tabatabaei-Yazdi, M.F. Rahman","doi":"10.1109/IEMDC.1997.604338","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604338","url":null,"abstract":"The paper describes a novel method for the efficiency evaluation of three-phase induction motors using a synthetic loading technique. The method substantially reduces the testing time and vertically mounted machines can be tested in the same way as horizontal ones, without the need to connect a load to the machine's drive shaft.","PeriodicalId":176640,"journal":{"name":"1997 IEEE International Electric Machines and Drives Conference Record","volume":"8 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":"114623870","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.1997.604307
Fang Deng
This paper presents an improved approach for predicting iron losses in permanent magnet brushless machines. The new approach is based on the fundamental concept that eddy current losses are proportional to the square of the time rate of change of flux density. The so-called anomalous or excess losses, caused by the induced eddy current concentration around moving magnetic domain walls and neglected in the conventional core loss calculation, are also included in the proposed approach. In addition, the model is also capable of accounting for the stator skewing, if present. The core losses obtained from the proposed approach are compared with those measured on existing PM motors at several operating speeds, showing very good agreement.
{"title":"An improved iron loss estimation for permanent magnet brushless machines","authors":"Fang Deng","doi":"10.1109/IEMDC.1997.604307","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604307","url":null,"abstract":"This paper presents an improved approach for predicting iron losses in permanent magnet brushless machines. The new approach is based on the fundamental concept that eddy current losses are proportional to the square of the time rate of change of flux density. The so-called anomalous or excess losses, caused by the induced eddy current concentration around moving magnetic domain walls and neglected in the conventional core loss calculation, are also included in the proposed approach. In addition, the model is also capable of accounting for the stator skewing, if present. The core losses obtained from the proposed approach are compared with those measured on existing PM motors at several operating speeds, showing very good agreement.","PeriodicalId":176640,"journal":{"name":"1997 IEEE International Electric Machines and Drives Conference Record","volume":"127 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":"117354906","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.1997.604238
M. Bech, F. Blaabjerg, A. Trzynadlowski
Results of experimental investigation of effects of random pulse width modulation on inverter-fed induction motor drives are presented. The quantities analyzed include the output voltage and current of the inverter, and the sound pressure produced by the drive system. A deterministic space-vector modulation technique and three random versions of this technique are compared for practical evaluation.
{"title":"Experimental evaluation of modern random PWM techniques for induction motor drives","authors":"M. Bech, F. Blaabjerg, A. Trzynadlowski","doi":"10.1109/IEMDC.1997.604238","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604238","url":null,"abstract":"Results of experimental investigation of effects of random pulse width modulation on inverter-fed induction motor drives are presented. The quantities analyzed include the output voltage and current of the inverter, and the sound pressure produced by the drive system. A deterministic space-vector modulation technique and three random versions of this technique are compared for practical evaluation.","PeriodicalId":176640,"journal":{"name":"1997 IEEE International Electric Machines and Drives Conference Record","volume":"33 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":"122157490","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.1997.604310
F. Caricchi, F. Crescimbini, O. Honorati
Original features such as compactness and lightness make slotless axial-flux permanent-magnet machines (AFPMs) eligible for application in large power motor drives devoted to the direct drive of ship propellers. The paper discusses characteristics of AFPMs designed for the marine propulsion application. A newly-conceived modular arrangement of the machine stator winding is proposed and experimental results taken from a small-size machine prototype are finally given.
{"title":"Modular, axial-flux, permanent-magnet motor for ship propulsion drives","authors":"F. Caricchi, F. Crescimbini, O. Honorati","doi":"10.1109/IEMDC.1997.604310","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604310","url":null,"abstract":"Original features such as compactness and lightness make slotless axial-flux permanent-magnet machines (AFPMs) eligible for application in large power motor drives devoted to the direct drive of ship propellers. The paper discusses characteristics of AFPMs designed for the marine propulsion application. A newly-conceived modular arrangement of the machine stator winding is proposed and experimental results taken from a small-size machine prototype are finally given.","PeriodicalId":176640,"journal":{"name":"1997 IEEE International Electric Machines and Drives Conference Record","volume":"279 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120869271","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.1997.604327
Hak-Yong Lee, H. Lee, Hyun-kyo Jung, S. Hahn, Ki-sik Lee, I. Park, G. Park, D. Son
This paper deals with the shape design for the reduction of stator core loss of the induction motor. The improved loss analysis is proposed which is based on core loss measurement under alternating flux with a certain harmonic component and elliptically rotating flux. The time step finite element analysis is used for the computation of state core loss of the induction motor.
{"title":"Shape design of stator slot for the reduction of stator core loss in the induction motor","authors":"Hak-Yong Lee, H. Lee, Hyun-kyo Jung, S. Hahn, Ki-sik Lee, I. Park, G. Park, D. Son","doi":"10.1109/IEMDC.1997.604327","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604327","url":null,"abstract":"This paper deals with the shape design for the reduction of stator core loss of the induction motor. The improved loss analysis is proposed which is based on core loss measurement under alternating flux with a certain harmonic component and elliptically rotating flux. The time step finite element analysis is used for the computation of state core loss of the induction motor.","PeriodicalId":176640,"journal":{"name":"1997 IEEE International Electric Machines and Drives Conference Record","volume":"43 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":"126138995","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.1997.604175
Guangdong He, J. Jiang, JianXin Shen, Jia Lei
In this paper, a new control approach for AC servo drive systems-fuzzy variable structure control (FVSC)-is proposed. It combines the advantages of fuzzy logic (FL) and variable structure control (VSC). FL is used to reduce the unfavorable chattering phenomena while VSC heightens the control system's robustness to parameter variations and load disturbances. Simulation results indicate that the proposed approach improves the control system performance evidently.
{"title":"A fuzzy variable structure control scheme for AC servo drive system","authors":"Guangdong He, J. Jiang, JianXin Shen, Jia Lei","doi":"10.1109/IEMDC.1997.604175","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604175","url":null,"abstract":"In this paper, a new control approach for AC servo drive systems-fuzzy variable structure control (FVSC)-is proposed. It combines the advantages of fuzzy logic (FL) and variable structure control (VSC). FL is used to reduce the unfavorable chattering phenomena while VSC heightens the control system's robustness to parameter variations and load disturbances. Simulation results indicate that the proposed approach improves the control system performance evidently.","PeriodicalId":176640,"journal":{"name":"1997 IEEE International Electric Machines and Drives Conference Record","volume":"30 5 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":"124655581","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.1997.604343
H. Karmaker, K.R. Weeber
An accurate calculation of air-gap ripple forces and torques is performed for a 21.55 MVA synchronous motor supplied by large AC adjustable-speed drives by using a time-stepping finite-element software package. The new software tool is used to control acoustic noise for design applications with stringent noise specifications.
{"title":"Time-stepping finite-element analysis of large synchronous motors with AC adjustable-speed drives for acoustic noise control studies","authors":"H. Karmaker, K.R. Weeber","doi":"10.1109/IEMDC.1997.604343","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604343","url":null,"abstract":"An accurate calculation of air-gap ripple forces and torques is performed for a 21.55 MVA synchronous motor supplied by large AC adjustable-speed drives by using a time-stepping finite-element software package. The new software tool is used to control acoustic noise for design applications with stringent noise specifications.","PeriodicalId":176640,"journal":{"name":"1997 IEEE International Electric Machines and Drives Conference Record","volume":"16 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":"129577943","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.1997.604309
F. Colamartino, C. Marchand, Adel Razek
In this paper the electromagnetic torque developed in PMSMs is analyzed. Two strategies are discussed for torque ripple minimization. The first is based on numerical predetermination of the current waveform which should be imposed to obtain a constant torque. The second is an on-line estimation and regulation of instantaneous torque.
{"title":"Torque ripple minimization in permanent magnet synchronous servodrive","authors":"F. Colamartino, C. Marchand, Adel Razek","doi":"10.1109/IEMDC.1997.604309","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604309","url":null,"abstract":"In this paper the electromagnetic torque developed in PMSMs is analyzed. Two strategies are discussed for torque ripple minimization. The first is based on numerical predetermination of the current waveform which should be imposed to obtain a constant torque. The second is an on-line estimation and regulation of instantaneous torque.","PeriodicalId":176640,"journal":{"name":"1997 IEEE International Electric Machines and Drives Conference Record","volume":"39 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":"129936214","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.1997.604254
Z. Hossain, K. Olejniczak, K. Burgers, J. Balda
A theoretical analysis of the switching behavior of the MOS-controlled thyristor (MCT), with and without stray inductances present, under different snubbering conditions has been presented in a companion paper. In order to verify these theoretical results, a hard-switched experimental test circuit was constructed. In this paper, a comparison is made among the newly-derived analytical, PSpice simulation and experimental results.
{"title":"Design of RCD snubbers based upon approximations to the switching characteristics. II. Simulation and experimental results","authors":"Z. Hossain, K. Olejniczak, K. Burgers, J. Balda","doi":"10.1109/IEMDC.1997.604254","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604254","url":null,"abstract":"A theoretical analysis of the switching behavior of the MOS-controlled thyristor (MCT), with and without stray inductances present, under different snubbering conditions has been presented in a companion paper. In order to verify these theoretical results, a hard-switched experimental test circuit was constructed. In this paper, a comparison is made among the newly-derived analytical, PSpice simulation and experimental results.","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":"122362415","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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