Pub Date : 1998-10-12DOI: 10.1109/IEMDC.1997.604308
Fang Deng
The discrete or hopping nature of magnetic field, produced by the nonsinusoidal square-wave stator currents of permanent magnet brushless DC motors, gives rise to eddy current losses in the rotor magnets and core. These losses, referred to as commutation losses, can be substantial in large propulsion motors. This paper presents a further refinement in the analytical model derived and presented in an earlier paper. The improved model is able to account for the space harmonic effect of the stator resultant magnetomotive force (MMF) on commutation losses and consequently can lead to a more accurate prediction of the commutation loss. The model was verified by comparing its results with those obtained using the finite element method at several operating speeds and current levels. The results show good improvement (an average value of 6.8% for the total losses) compared with the earlier model (an average value of 11.7%).
{"title":"Improved analytical modeling of commutation losses including space harmonic effects in permanent magnet brushless DC motors","authors":"Fang Deng","doi":"10.1109/IEMDC.1997.604308","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604308","url":null,"abstract":"The discrete or hopping nature of magnetic field, produced by the nonsinusoidal square-wave stator currents of permanent magnet brushless DC motors, gives rise to eddy current losses in the rotor magnets and core. These losses, referred to as commutation losses, can be substantial in large propulsion motors. This paper presents a further refinement in the analytical model derived and presented in an earlier paper. The improved model is able to account for the space harmonic effect of the stator resultant magnetomotive force (MMF) on commutation losses and consequently can lead to a more accurate prediction of the commutation loss. The model was verified by comparing its results with those obtained using the finite element method at several operating speeds and current levels. The results show good improvement (an average value of 6.8% for the total losses) compared with the earlier model (an average value of 11.7%).","PeriodicalId":176640,"journal":{"name":"1997 IEEE International Electric Machines and Drives Conference Record","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131025171","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.1997.604092
M. Akherraz
This paper presents dynamic modeling and simulation of voltage source induction motor drives assisted by PSPICE. From the qd dynamic model of the electrical and mechanical modes, PSPICE equivalent circuits are designed and implemented for each harmonic voltage component. Closed form qd voltage equations are derived in case of a six step inverter. The proposed PSPICE net-list structured approach allows easy adding or deleting of harmonic contribution to the drive motor dynamics. Variety of transient behavior cases, such as starting, speed reversal, frequency perturbation, are investigated. Salient results are presented and commented upon.
{"title":"PSPICE-assisted dynamic modeling and simulation of induction motor drives","authors":"M. Akherraz","doi":"10.1109/IEMDC.1997.604092","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604092","url":null,"abstract":"This paper presents dynamic modeling and simulation of voltage source induction motor drives assisted by PSPICE. From the qd dynamic model of the electrical and mechanical modes, PSPICE equivalent circuits are designed and implemented for each harmonic voltage component. Closed form qd voltage equations are derived in case of a six step inverter. The proposed PSPICE net-list structured approach allows easy adding or deleting of harmonic contribution to the drive motor dynamics. Variety of transient behavior cases, such as starting, speed reversal, frequency perturbation, are investigated. Salient results are presented and commented upon.","PeriodicalId":176640,"journal":{"name":"1997 IEEE International Electric Machines and Drives Conference Record","volume":"2 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":"117060826","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.1997.604083
A. Cardoso, S. Cruz, D. Fonseca
The subject of online detection and location of inter-turn short circuits in the stator windings of three-phase induction motors is discussed, and a noninvasive approach, based on the computer-aided monitoring of the stator current Park's vector, is introduced. Experimental results, obtained by using a special fault producing test rig, demonstrate the effectiveness of the proposed technique for detecting inter-turn stator winding faults in operating three-phase induction machines.
{"title":"Inter-turn stator winding fault diagnosis in three-phase induction motors, by Park's Vector approach","authors":"A. Cardoso, S. Cruz, D. Fonseca","doi":"10.1109/IEMDC.1997.604083","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604083","url":null,"abstract":"The subject of online detection and location of inter-turn short circuits in the stator windings of three-phase induction motors is discussed, and a noninvasive approach, based on the computer-aided monitoring of the stator current Park's vector, is introduced. Experimental results, obtained by using a special fault producing test rig, demonstrate the effectiveness of the proposed technique for detecting inter-turn stator winding faults in operating three-phase induction machines.","PeriodicalId":176640,"journal":{"name":"1997 IEEE International Electric Machines and Drives Conference Record","volume":"62 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":"121048177","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.1997.604108
F. Huang, W. Beattie
This paper describes the modeling and simulation of the Islay wave power conversion system which is located on the Island of Islay off the western coast of Scotland. A hybrid model of a wave-driven turbine and a grid-connected wound-rotor induction generator is constructed. The generator is modeled such that it retains the actual rotor phase variables but transforms the stator variables only. The model, implemented in Matlab, can be used to investigate under both transient and steady states the behaviors of system variables such as the stator current, the rotor current, and the generated power and torque. Some of the simulation results are presented.
{"title":"Modeling and simulation of the Islay wave power conversion system","authors":"F. Huang, W. Beattie","doi":"10.1109/IEMDC.1997.604108","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604108","url":null,"abstract":"This paper describes the modeling and simulation of the Islay wave power conversion system which is located on the Island of Islay off the western coast of Scotland. A hybrid model of a wave-driven turbine and a grid-connected wound-rotor induction generator is constructed. The generator is modeled such that it retains the actual rotor phase variables but transforms the stator variables only. The model, implemented in Matlab, can be used to investigate under both transient and steady states the behaviors of system variables such as the stator current, the rotor current, and the generated power and torque. Some of the simulation results are presented.","PeriodicalId":176640,"journal":{"name":"1997 IEEE International Electric Machines and Drives Conference Record","volume":"75 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":"121094512","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.1997.604259
S. Mazumder
A detailed mathematical analysis was performed to estimate the current ripple as a function of modulation index for direct indirect and bus clamped methods of space vector modulation. The results, both experimental and simulated, show that for a modulation index above 0.45 the direct-indirect method progressively gives lesser current ripple and becomes almost half at around a modulation index of 1. For an intelligent drive, with the optimizing criterion as current ripple, this helps in dynamically switching between bus clamped and direct-indirect methods.
{"title":"Complete mathematical analysis of ripple current as a function of the modulation index for direct indirect and bus clamped space vector modulation techniques [motor drives]","authors":"S. Mazumder","doi":"10.1109/IEMDC.1997.604259","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604259","url":null,"abstract":"A detailed mathematical analysis was performed to estimate the current ripple as a function of modulation index for direct indirect and bus clamped methods of space vector modulation. The results, both experimental and simulated, show that for a modulation index above 0.45 the direct-indirect method progressively gives lesser current ripple and becomes almost half at around a modulation index of 1. For an intelligent drive, with the optimizing criterion as current ripple, this helps in dynamically switching between bus clamped and direct-indirect methods.","PeriodicalId":176640,"journal":{"name":"1997 IEEE International Electric Machines and Drives Conference Record","volume":"31 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":"125401630","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.1997.604169
M. Salo, J. Ollila
In this paper, the software implementation of a rotor flux-oriented current vector-controlled induction motor drive is discussed. The control system and the modulator are realised using a general purpose Motorola 68HC16Z1 single-chip microcontroller . A new space vector modulation implementation for HC16-family microcontrollers is introduced. Some experimental measurements are also shown.
{"title":"Software implementation of a rotor flux oriented vector controlled AC drive without an external modulator","authors":"M. Salo, J. Ollila","doi":"10.1109/IEMDC.1997.604169","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604169","url":null,"abstract":"In this paper, the software implementation of a rotor flux-oriented current vector-controlled induction motor drive is discussed. The control system and the modulator are realised using a general purpose Motorola 68HC16Z1 single-chip microcontroller . A new space vector modulation implementation for HC16-family microcontrollers is introduced. Some experimental measurements are also shown.","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":"125693102","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.1997.604314
S. Henneberger, S. Van Haute, K. Hameyer, R. Belmans
Due to the demand for more powerful photovoltaic irrigation systems, a 3.8 kW permanent magnet synchronous motor (PMSM) has been designed and developed. The higher efficiency of PMSMs compared to induction motors is shown. A standard induction motor having a squirrel cage rotor and a permanent magnet rotor are studied for comparison purposes. In order to avoid the use of a position sensor, an additional rotor cage for "open loop" operation is implemented.
{"title":"Submersible installed permanent magnet synchronous motor for a photovoltaic pump system","authors":"S. Henneberger, S. Van Haute, K. Hameyer, R. Belmans","doi":"10.1109/IEMDC.1997.604314","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604314","url":null,"abstract":"Due to the demand for more powerful photovoltaic irrigation systems, a 3.8 kW permanent magnet synchronous motor (PMSM) has been designed and developed. The higher efficiency of PMSMs compared to induction motors is shown. A standard induction motor having a squirrel cage rotor and a permanent magnet rotor are studied for comparison purposes. In order to avoid the use of a position sensor, an additional rotor cage for \"open loop\" operation is implemented.","PeriodicalId":176640,"journal":{"name":"1997 IEEE International Electric Machines and Drives Conference Record","volume":"49 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":"114589846","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.1997.604177
C. Obermeier, H. Kellermann, G. Brandenburg
For the sensorless speed control of stepper motors, the rotor position and the speed can be determined by an extended Kalman filter which estimates the state variables by only measuring the phase voltages and currents. Experimental results confirm that these robust, four-quadrant, sensorless drives cover a wide range of speed nearly down to standstill.
{"title":"Sensorless field oriented speed control of a hybrid and a permanent magnet disk stepper motor using an extended Kalman filter","authors":"C. Obermeier, H. Kellermann, G. Brandenburg","doi":"10.1109/IEMDC.1997.604177","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604177","url":null,"abstract":"For the sensorless speed control of stepper motors, the rotor position and the speed can be determined by an extended Kalman filter which estimates the state variables by only measuring the phase voltages and currents. Experimental results confirm that these robust, four-quadrant, sensorless drives cover a wide range of speed nearly down to standstill.","PeriodicalId":176640,"journal":{"name":"1997 IEEE International Electric Machines and Drives Conference Record","volume":"50 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":"128321444","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.1997.604105
O.S. Lobosco
Frequently the methods adopted to analyze control systems using DC motors involve several simplifications in the modeling of the electrical machine. This paper presents a model suitable for transient studies of DC motors, including the overall effects of the armature reaction: saturation, commutation and interpoles action.
{"title":"Modeling and simulation of DC motors in dynamic conditions","authors":"O.S. Lobosco","doi":"10.1109/IEMDC.1997.604105","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604105","url":null,"abstract":"Frequently the methods adopted to analyze control systems using DC motors involve several simplifications in the modeling of the electrical machine. This paper presents a model suitable for transient studies of DC motors, including the overall effects of the armature reaction: saturation, commutation and interpoles action.","PeriodicalId":176640,"journal":{"name":"1997 IEEE International Electric Machines and Drives Conference Record","volume":"42 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":"128450784","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.1997.604224
M. A. Alhamadi, N. Demerdash
This paper presents optimization of the skew angle of rotor magnetic poles in permanent magnet class of machines. The skew angle optimization is achieved using the gradient based inverse problem methodology. The paper introduces the armature winding flux linkages and associated induced EMFs for the first time as the object function. In the mean time, this object function involves the use of stored energy and excitation perturbation techniques. An example 1.2 HP permanent magnet brushless DC machine is used to demonstrate the validity and usefulness of the method.
{"title":"Optimization of the skew angle of rotor magnetic poles in permanent magnet machines based on the inverse problem method","authors":"M. A. Alhamadi, N. Demerdash","doi":"10.1109/IEMDC.1997.604224","DOIUrl":"https://doi.org/10.1109/IEMDC.1997.604224","url":null,"abstract":"This paper presents optimization of the skew angle of rotor magnetic poles in permanent magnet class of machines. The skew angle optimization is achieved using the gradient based inverse problem methodology. The paper introduces the armature winding flux linkages and associated induced EMFs for the first time as the object function. In the mean time, this object function involves the use of stored energy and excitation perturbation techniques. An example 1.2 HP permanent magnet brushless DC machine is used to demonstrate the validity and usefulness of the method.","PeriodicalId":176640,"journal":{"name":"1997 IEEE International Electric Machines and Drives Conference Record","volume":"476 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":"128696635","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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