Pub Date : 2008-06-11DOI: 10.1109/SPEEDHAM.2008.4581087
S. Yoshioka, M. Hasegawa, K. Matsui
This paper proposes a new position sensorless control for interior permanent magnet synchronous motor(IPMSM) drives fed by over-modulation mode PWM voltage source inverter. Overmodulation mode PWM voltage source inverter makes it possible to solve some problems such as efficiency, wide speed range operation and so on. Most position sensorless control based on inverter output voltage knowledge, however, cannot directly be utilized because voltage reference obtained by the controller is not equal to inverter output voltage. This paper proposes un-known input observer to estimate rotor position without voltage knowledge, and investigates robustness to inductance variation.
{"title":"Robustness evaluation of IPMSM sensorless control to magnetic saturation using un-known input observer","authors":"S. Yoshioka, M. Hasegawa, K. Matsui","doi":"10.1109/SPEEDHAM.2008.4581087","DOIUrl":"https://doi.org/10.1109/SPEEDHAM.2008.4581087","url":null,"abstract":"This paper proposes a new position sensorless control for interior permanent magnet synchronous motor(IPMSM) drives fed by over-modulation mode PWM voltage source inverter. Overmodulation mode PWM voltage source inverter makes it possible to solve some problems such as efficiency, wide speed range operation and so on. Most position sensorless control based on inverter output voltage knowledge, however, cannot directly be utilized because voltage reference obtained by the controller is not equal to inverter output voltage. This paper proposes un-known input observer to estimate rotor position without voltage knowledge, and investigates robustness to inductance variation.","PeriodicalId":345557,"journal":{"name":"2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116257239","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 : 2008-06-11DOI: 10.1109/SPEEDHAM.2008.4581181
C. Bruzzese, A. Giordani, A. Rossi, E. Santini
In this paper an accurate modeling of air-gap length function in polar and interpolar regions of non- isotropic synchronous generators is presented, for use in the MWFA (modified winding function approach), to obtain accurate machine simulations with eccentricities. Air-gap in interpolar regions is usually poorly modeled in current literature. Inductances obtained by the improved MWFA have been compared with 3D-FEM model obtained ones. External no-load e.m.f. and current spectra have been evaluated for a medium-power alternator with non-aligned rotor, and with various static and dynamic eccentricity degrees. Fault signatures appear all over the spectra, with variable entities, whose comprehensive evaluation can be used for fault severity assessment.
{"title":"Synchronous generator eccentricities modeling by improved MWFA and fault signature evaluation in no-load E.M.F.s and current spectra","authors":"C. Bruzzese, A. Giordani, A. Rossi, E. Santini","doi":"10.1109/SPEEDHAM.2008.4581181","DOIUrl":"https://doi.org/10.1109/SPEEDHAM.2008.4581181","url":null,"abstract":"In this paper an accurate modeling of air-gap length function in polar and interpolar regions of non- isotropic synchronous generators is presented, for use in the MWFA (modified winding function approach), to obtain accurate machine simulations with eccentricities. Air-gap in interpolar regions is usually poorly modeled in current literature. Inductances obtained by the improved MWFA have been compared with 3D-FEM model obtained ones. External no-load e.m.f. and current spectra have been evaluated for a medium-power alternator with non-aligned rotor, and with various static and dynamic eccentricity degrees. Fault signatures appear all over the spectra, with variable entities, whose comprehensive evaluation can be used for fault severity assessment.","PeriodicalId":345557,"journal":{"name":"2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126452338","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 : 2008-06-11DOI: 10.1109/SPEEDHAM.2008.4581147
F. Lopes, P. S. Oliveira, L. Reis, R. Araújo
Nowadays the education on electrical engineering, in European countries, is facing on one side a high demand for engineers coming from industry and on the other hand a reduced interest from younger generation, whose interest is highly polarised by information and communication technologies. A permanent-magnet synchronous motor (PMSM) controller for an electric wheelchair demo track has been set up, in order to reinforce the demonstrative aspects of modern technology as a contribution to the motivation of students for the industrial electronics world. The motors are controlled at different operating conditions by means of a current control law using a low cost microcontroller board. The prototype has been designed specifically to meet the requirement of low cost and it contains all of the active functions required to implement the control of the electric wheelchair. The resulting prototype has a very low cost compared to commercial ldquoblack-boxrdquo modules. This prototype allows a first approach between a real technical system and power electronics, increasing the studentpsilas motivation for the power electronics area and to significantly enhance their skills to measure and interpret measurements and comparing those to theoretical predictions.
{"title":"An electric wheelchair as a tool for motivating students in power electronics","authors":"F. Lopes, P. S. Oliveira, L. Reis, R. Araújo","doi":"10.1109/SPEEDHAM.2008.4581147","DOIUrl":"https://doi.org/10.1109/SPEEDHAM.2008.4581147","url":null,"abstract":"Nowadays the education on electrical engineering, in European countries, is facing on one side a high demand for engineers coming from industry and on the other hand a reduced interest from younger generation, whose interest is highly polarised by information and communication technologies. A permanent-magnet synchronous motor (PMSM) controller for an electric wheelchair demo track has been set up, in order to reinforce the demonstrative aspects of modern technology as a contribution to the motivation of students for the industrial electronics world. The motors are controlled at different operating conditions by means of a current control law using a low cost microcontroller board. The prototype has been designed specifically to meet the requirement of low cost and it contains all of the active functions required to implement the control of the electric wheelchair. The resulting prototype has a very low cost compared to commercial ldquoblack-boxrdquo modules. This prototype allows a first approach between a real technical system and power electronics, increasing the studentpsilas motivation for the power electronics area and to significantly enhance their skills to measure and interpret measurements and comparing those to theoretical predictions.","PeriodicalId":345557,"journal":{"name":"2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129976111","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 : 2008-06-11DOI: 10.1109/SPEEDHAM.2008.4581265
K. Wilkie, M. Foster, D. Stone, C. Bingham
This paper presents a methodology for tuning a PID-based feedback controller for a buck converter using the ITAE controller performance index. The controller parameters are optimized to ensure that a reasonable transient response can be achieved whilst retaining stable operation. Experimental results demonstrate the versatility of the on-line tuning methodology.
{"title":"Hardware-in-the-loop tuning of a feedback controller for a buck converter using a GA","authors":"K. Wilkie, M. Foster, D. Stone, C. Bingham","doi":"10.1109/SPEEDHAM.2008.4581265","DOIUrl":"https://doi.org/10.1109/SPEEDHAM.2008.4581265","url":null,"abstract":"This paper presents a methodology for tuning a PID-based feedback controller for a buck converter using the ITAE controller performance index. The controller parameters are optimized to ensure that a reasonable transient response can be achieved whilst retaining stable operation. Experimental results demonstrate the versatility of the on-line tuning methodology.","PeriodicalId":345557,"journal":{"name":"2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131835887","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 : 2008-06-11DOI: 10.1109/SPEEDHAM.2008.4581279
D. Ilişiu
The Commercial Code application imposes a new concept on system control of dispatchable units. The necessity to respect hourpsilas notifications, dispatch orders issues by balancing market and new rules for secondary control, have consequences on units operation mode. An optimal operation with diminishing of the unbalances can be achieved only on presence of power net loop control. Also, the specifying rules of the Commercial Code to report the net energy unbalances at the interface point with the transport grid has technical consequences on power loop control. The document focuses on technical requirements need to be implemented at units level especially in thermo power plants for its operation optimization. The paper present in comparative manner, the tests of behavior for thermal and hydro units in different (opening and power control) operational modes, for highlighting the advantage of power net loop control implementation. Also the paper presents real tests for primary control with frequency simulation.
{"title":"Romanian energy market impact on automation and management systems of the large power plant units","authors":"D. Ilişiu","doi":"10.1109/SPEEDHAM.2008.4581279","DOIUrl":"https://doi.org/10.1109/SPEEDHAM.2008.4581279","url":null,"abstract":"The Commercial Code application imposes a new concept on system control of dispatchable units. The necessity to respect hourpsilas notifications, dispatch orders issues by balancing market and new rules for secondary control, have consequences on units operation mode. An optimal operation with diminishing of the unbalances can be achieved only on presence of power net loop control. Also, the specifying rules of the Commercial Code to report the net energy unbalances at the interface point with the transport grid has technical consequences on power loop control. The document focuses on technical requirements need to be implemented at units level especially in thermo power plants for its operation optimization. The paper present in comparative manner, the tests of behavior for thermal and hydro units in different (opening and power control) operational modes, for highlighting the advantage of power net loop control implementation. Also the paper presents real tests for primary control with frequency simulation.","PeriodicalId":345557,"journal":{"name":"2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"64 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131016686","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 : 2008-06-11DOI: 10.1109/SPEEDHAM.2008.4581114
C. Wang, Z. Zhou, P. Unsworth, T. O'Farrell
Sensorless speed measurement of induction machines using short time Fourier transformation (STFT) is presented in this paper. The sensorless speed information of induction motors was derived from space vector angular fluctuation which is obtained from stator current by exploring the position of the current space vector in the space vector plane. By applying STFT to the space vector angular fluctuation signals, the eccentricity associated motor speed information can be extracted. Interpolation technique has been used to improve the accuracy of the STFT. The method has been verified on an ABB 2-pole squirrel-cage induction motor in laboratory in the case of motor starting; very good agreement has been achieved between the estimated speed and the actually measured speed.
{"title":"Sensorless speed measurement of induction machines using Short Time Fourier Transformation","authors":"C. Wang, Z. Zhou, P. Unsworth, T. O'Farrell","doi":"10.1109/SPEEDHAM.2008.4581114","DOIUrl":"https://doi.org/10.1109/SPEEDHAM.2008.4581114","url":null,"abstract":"Sensorless speed measurement of induction machines using short time Fourier transformation (STFT) is presented in this paper. The sensorless speed information of induction motors was derived from space vector angular fluctuation which is obtained from stator current by exploring the position of the current space vector in the space vector plane. By applying STFT to the space vector angular fluctuation signals, the eccentricity associated motor speed information can be extracted. Interpolation technique has been used to improve the accuracy of the STFT. The method has been verified on an ABB 2-pole squirrel-cage induction motor in laboratory in the case of motor starting; very good agreement has been achieved between the estimated speed and the actually measured speed.","PeriodicalId":345557,"journal":{"name":"2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127858193","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 : 2008-06-11DOI: 10.1109/SPEEDHAM.2008.4581226
K. Oguchi
Novel multiple boost rectifier systems coupled with an autotransformer having a capacity rating of 20% are presented. The autotransformer in the triple rectifier system synthesizes two three-phase voltage systems with a phase shift angle of 20deg and an amplitude of 1.064 times with respect to the line voltages. These asymmetrical voltage systems make the transformer winding structure simpler. The boost choppers control the DC currents along with the DC output voltage so that the output DC power of each rectifier becomes equal. The quasi-trapezoidal modulation of the DC currents generates sinusoidal resultant input line currents except for switching ripples. The modification of the proposed concept to a quintuple rectifier system and the comparison with a conventional PWM converter are also presented.
{"title":"Asymmetrical multi-phase voltage methods of autotransformer-based boost rectifier systems with three-phase sinusoidal line currents","authors":"K. Oguchi","doi":"10.1109/SPEEDHAM.2008.4581226","DOIUrl":"https://doi.org/10.1109/SPEEDHAM.2008.4581226","url":null,"abstract":"Novel multiple boost rectifier systems coupled with an autotransformer having a capacity rating of 20% are presented. The autotransformer in the triple rectifier system synthesizes two three-phase voltage systems with a phase shift angle of 20deg and an amplitude of 1.064 times with respect to the line voltages. These asymmetrical voltage systems make the transformer winding structure simpler. The boost choppers control the DC currents along with the DC output voltage so that the output DC power of each rectifier becomes equal. The quasi-trapezoidal modulation of the DC currents generates sinusoidal resultant input line currents except for switching ripples. The modification of the proposed concept to a quintuple rectifier system and the comparison with a conventional PWM converter are also presented.","PeriodicalId":345557,"journal":{"name":"2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131882346","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 : 2008-06-11DOI: 10.1109/SPEEDHAM.2008.4581259
S. Abe, M. Shoyama, T. Ninomiya
POL with peak current mode control has first-order response depending on the controller design, and the overshoot and undershoot donpsilat appear in transient response. This feature is the chief advantage of peak current mode control. However, there is no example of the design that employed this feature efficiently. This paper investigates the design consideration for first-order response of peak current mode control in low-voltage application.
{"title":"First-order transient response of DC-DC converter with peak current mode control for low-voltage application","authors":"S. Abe, M. Shoyama, T. Ninomiya","doi":"10.1109/SPEEDHAM.2008.4581259","DOIUrl":"https://doi.org/10.1109/SPEEDHAM.2008.4581259","url":null,"abstract":"POL with peak current mode control has first-order response depending on the controller design, and the overshoot and undershoot donpsilat appear in transient response. This feature is the chief advantage of peak current mode control. However, there is no example of the design that employed this feature efficiently. This paper investigates the design consideration for first-order response of peak current mode control in low-voltage application.","PeriodicalId":345557,"journal":{"name":"2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115551195","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 : 2008-06-11DOI: 10.1109/SPEEDHAM.2008.4581204
G. Bârcă, A. Moschetto, C. Sapuppo, G. Marco Tina, R. Giusto, A. D. Grasso
This paper reports on a new online lead-acid battery state of charge (SOC) monitoring system for both the discharge and charge periods. The proposed SOC monitoring system is based on both a mathematical model and static charge/discharge characteristics at various current rates. Experimental results confirming the validity of the model are also reported.
{"title":"An advanced SOC model for a stand-alone telecommunication system","authors":"G. Bârcă, A. Moschetto, C. Sapuppo, G. Marco Tina, R. Giusto, A. D. Grasso","doi":"10.1109/SPEEDHAM.2008.4581204","DOIUrl":"https://doi.org/10.1109/SPEEDHAM.2008.4581204","url":null,"abstract":"This paper reports on a new online lead-acid battery state of charge (SOC) monitoring system for both the discharge and charge periods. The proposed SOC monitoring system is based on both a mathematical model and static charge/discharge characteristics at various current rates. Experimental results confirming the validity of the model are also reported.","PeriodicalId":345557,"journal":{"name":"2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115692979","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 : 2008-06-11DOI: 10.1109/SPEEDHAM.2008.4581325
V. Hrabovcová, P. Rafajdus, M. Vojenčiak, M. Susota
The paper deals with thermal analysis of the superconducting single-phase high temperature superconductivity (HTS) traction transformer. The purpose is to investigate a thermal distribution of a heat in a cryogen with liquid nitrogen using a FEM software and program Fluent. The outputs are time varying waveforms of temperature in certain points of the transformer, if the convection is neglected (it will be simulated by means of a 3D version of FEM software) and if the convection is taken into account by means of Fluent program.
{"title":"Thermal analysis of superconducting traction transformer","authors":"V. Hrabovcová, P. Rafajdus, M. Vojenčiak, M. Susota","doi":"10.1109/SPEEDHAM.2008.4581325","DOIUrl":"https://doi.org/10.1109/SPEEDHAM.2008.4581325","url":null,"abstract":"The paper deals with thermal analysis of the superconducting single-phase high temperature superconductivity (HTS) traction transformer. The purpose is to investigate a thermal distribution of a heat in a cryogen with liquid nitrogen using a FEM software and program Fluent. The outputs are time varying waveforms of temperature in certain points of the transformer, if the convection is neglected (it will be simulated by means of a 3D version of FEM software) and if the convection is taken into account by means of Fluent program.","PeriodicalId":345557,"journal":{"name":"2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116940563","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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