Pub Date : 2003-06-15DOI: 10.1109/PESC.2003.1218120
Hoe-Sung Huh, Kyo-Beum Lee, Jang-Hyun Park, I. Choy, Gwi-Tae Park
The objective of this paper is design of a robust stable speed controller for speed-sensorless induction motor direct torque control (DTC) systems. Overall control systems are composed of a speed estimator and the proposed uncertainty observer using the radial basis function networks (RBFN). The induction motor systems in the real industrial fields, the obtaining of an exact mathematical model is hardly difficult due to the unmodeled uncertainties such as parametric uncertainties and external load disturbances. In this paper, the uncertainties are approximated by the RBFN, and the control algorithm is applied to the DTC system. Control laws and adaptive laws for the bounding constant and weights in the output layer of the RBFN are established so that the whole closed loop system is stable in the sense of Lyapunov. The proposed control algorithm is relatively simple and requires no restrictive conditions on the design constants for the stability. Simulation results show the effectiveness and validity of the proposed control algorithm.
{"title":"Design of a robust stable speed-sensorless induction motor direct torque control system using the RBFN","authors":"Hoe-Sung Huh, Kyo-Beum Lee, Jang-Hyun Park, I. Choy, Gwi-Tae Park","doi":"10.1109/PESC.2003.1218120","DOIUrl":"https://doi.org/10.1109/PESC.2003.1218120","url":null,"abstract":"The objective of this paper is design of a robust stable speed controller for speed-sensorless induction motor direct torque control (DTC) systems. Overall control systems are composed of a speed estimator and the proposed uncertainty observer using the radial basis function networks (RBFN). The induction motor systems in the real industrial fields, the obtaining of an exact mathematical model is hardly difficult due to the unmodeled uncertainties such as parametric uncertainties and external load disturbances. In this paper, the uncertainties are approximated by the RBFN, and the control algorithm is applied to the DTC system. Control laws and adaptive laws for the bounding constant and weights in the output layer of the RBFN are established so that the whole closed loop system is stable in the sense of Lyapunov. The proposed control algorithm is relatively simple and requires no restrictive conditions on the design constants for the stability. Simulation results show the effectiveness and validity of the proposed control algorithm.","PeriodicalId":236199,"journal":{"name":"IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03.","volume":"119 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132394479","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 : 2003-06-15DOI: 10.1109/PESC.2003.1218113
Zhao Dongyuan, Yu Xinjie, C. Jianye, Wang Zanji, L. Bin
How to eliminate the harmonics is one of the key technologies of high-voltage direct current HVDC transmission systems. A hybrid filter, consisting of a double tune passive filter and an active filter, can take full advantage of these performances and is applied in some existing projects. This paper compare the operation of three control schemes due to adopting different harmonic measurement schemes.
{"title":"Novel control schemes for the hybrid filter applied in HVDC according to the different harmonic measurement schemes","authors":"Zhao Dongyuan, Yu Xinjie, C. Jianye, Wang Zanji, L. Bin","doi":"10.1109/PESC.2003.1218113","DOIUrl":"https://doi.org/10.1109/PESC.2003.1218113","url":null,"abstract":"How to eliminate the harmonics is one of the key technologies of high-voltage direct current HVDC transmission systems. A hybrid filter, consisting of a double tune passive filter and an active filter, can take full advantage of these performances and is applied in some existing projects. This paper compare the operation of three control schemes due to adopting different harmonic measurement schemes.","PeriodicalId":236199,"journal":{"name":"IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03.","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131933720","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 : 2003-06-15DOI: 10.1109/PESC.2003.1218163
A. Bryant, P. Palmer, J. Hudgins, E. Santi, X. Kang
A procedure for automatic parameter extraction is outlined, based on accurate physics-based models of the diode, IGBT and associated circuitry. A formal optimisation method is used to refine initial parameter estimates, and is coupled with a hardware testing system to obtain device waveform measurements.
{"title":"The use of a formal optimisation procedure in automatic parameter extraction of power semiconductor devices","authors":"A. Bryant, P. Palmer, J. Hudgins, E. Santi, X. Kang","doi":"10.1109/PESC.2003.1218163","DOIUrl":"https://doi.org/10.1109/PESC.2003.1218163","url":null,"abstract":"A procedure for automatic parameter extraction is outlined, based on accurate physics-based models of the diode, IGBT and associated circuitry. A formal optimisation method is used to refine initial parameter estimates, and is coupled with a hardware testing system to obtain device waveform measurements.","PeriodicalId":236199,"journal":{"name":"IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03.","volume":"464 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133835230","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 : 2003-06-15DOI: 10.1109/PESC.2003.1218141
R. Carbone, P. Corsonello
A new passive approach for power factor correction of single-phase uncontrolled bridge rectifiers is presented and discussed. Power factor correction is obtained by adding a proper branch with passive elements at the DC-side terminals of the rectifier; it is able to make the behavior of the total DC-load quasi-resistive. The optimal values of the power factor corrector parameters are calculated bearing in mind the load and the DC-filter parameters. An analysis of its performances and of its applicability limits is developed with the help of several PSpice numerical simulations on different case-study circuits. The proposed approach can be applied successfully on uncontrolled bridge rectifiers with continuous operation mode (i.e. inductive and inductive-capacitive filter on the DC-side) and good performances are also expected for diode rectifier with output voltage regulation operated by means of DC/DC regulators. The most important perspective is represented by the substitution of the resistor of the proposed passive branch with a "resistance emulator" able to guarantee similar effects on the rectifier absorbed current, avoiding extra power losses.
{"title":"A new passive power factor corrector for single-phase bridge diode rectifiers","authors":"R. Carbone, P. Corsonello","doi":"10.1109/PESC.2003.1218141","DOIUrl":"https://doi.org/10.1109/PESC.2003.1218141","url":null,"abstract":"A new passive approach for power factor correction of single-phase uncontrolled bridge rectifiers is presented and discussed. Power factor correction is obtained by adding a proper branch with passive elements at the DC-side terminals of the rectifier; it is able to make the behavior of the total DC-load quasi-resistive. The optimal values of the power factor corrector parameters are calculated bearing in mind the load and the DC-filter parameters. An analysis of its performances and of its applicability limits is developed with the help of several PSpice numerical simulations on different case-study circuits. The proposed approach can be applied successfully on uncontrolled bridge rectifiers with continuous operation mode (i.e. inductive and inductive-capacitive filter on the DC-side) and good performances are also expected for diode rectifier with output voltage regulation operated by means of DC/DC regulators. The most important perspective is represented by the substitution of the resistor of the proposed passive branch with a \"resistance emulator\" able to guarantee similar effects on the rectifier absorbed current, avoiding extra power losses.","PeriodicalId":236199,"journal":{"name":"IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03.","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116506671","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 : 2003-06-15DOI: 10.1109/PESC.2003.1218328
X. Xue, K. Cheng, S. Ho, D. Sutanto
The precise analytical modeling magnetic characteristics in the switched reluctance motors is presented in this study, based on the two-dimensional least squares. The proposed precise modeling is the analytical expression with respect to both the rotor position and the current. The coefficients in the expression are determined by the two dimensional least squares method. The derivations of the modelling are described in detail. Furthermore, the effect of the degree number of the fitting polynomials on the fitting errors is discussed. The fitting curves from the proposed modelling are fully in agreement with ones from the experiment. It validates the proposed modelling. This study is very helpful for accurate prediction of performance, simulation, torque control, as well as sensorless control of the switched reluctance motor drives.
{"title":"Precise analytical modelling magnetic characteristics of switched reluctance motor drives using two-dimensional least squares","authors":"X. Xue, K. Cheng, S. Ho, D. Sutanto","doi":"10.1109/PESC.2003.1218328","DOIUrl":"https://doi.org/10.1109/PESC.2003.1218328","url":null,"abstract":"The precise analytical modeling magnetic characteristics in the switched reluctance motors is presented in this study, based on the two-dimensional least squares. The proposed precise modeling is the analytical expression with respect to both the rotor position and the current. The coefficients in the expression are determined by the two dimensional least squares method. The derivations of the modelling are described in detail. Furthermore, the effect of the degree number of the fitting polynomials on the fitting errors is discussed. The fitting curves from the proposed modelling are fully in agreement with ones from the experiment. It validates the proposed modelling. This study is very helpful for accurate prediction of performance, simulation, torque control, as well as sensorless control of the switched reluctance motor drives.","PeriodicalId":236199,"journal":{"name":"IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03.","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116736799","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 : 2003-06-15DOI: 10.1109/PESC.2003.1217709
Kihong Park, Tae-Sung Kim, Sung-Chan Ahn, D. Hyun
This paper presents a novel robust speed control method based on the load torque observer of high-performance brushless DC (BLDC) motor. Recently, high-performance BLDC motor drives are widely used for variable speed drive systems of the industrial applications. In case of the control of robot arms and tracking applications with lower stiffness, we cannot design the speed controller gain to be very large from the viewpoint of the system stability. Thus, the feedforward compensator with disturbance torque observer was proposed. This method can improve the servo stiffness without increasing the speed controller gain. The enhanced speed control performance can be achieved and the speed response against the disturbance torque can be improved for high-performance BLDC motor drive systems in which the bandwidth of the speed controller cannot be made large enough. The load disturbance is compensated by detected load torque through the observer. The compensation current is made through q-axis current. The d-q transform of phase currents were possible by the Fourier series summation method. Consequently, the speed control for high-performance BLDC motor drives become improved. The simulation results for BLDC motor drive systems confirm the validity of the proposed method.
{"title":"Speed control of high-performance brushless DC motor drives by load torque estimation","authors":"Kihong Park, Tae-Sung Kim, Sung-Chan Ahn, D. Hyun","doi":"10.1109/PESC.2003.1217709","DOIUrl":"https://doi.org/10.1109/PESC.2003.1217709","url":null,"abstract":"This paper presents a novel robust speed control method based on the load torque observer of high-performance brushless DC (BLDC) motor. Recently, high-performance BLDC motor drives are widely used for variable speed drive systems of the industrial applications. In case of the control of robot arms and tracking applications with lower stiffness, we cannot design the speed controller gain to be very large from the viewpoint of the system stability. Thus, the feedforward compensator with disturbance torque observer was proposed. This method can improve the servo stiffness without increasing the speed controller gain. The enhanced speed control performance can be achieved and the speed response against the disturbance torque can be improved for high-performance BLDC motor drive systems in which the bandwidth of the speed controller cannot be made large enough. The load disturbance is compensated by detected load torque through the observer. The compensation current is made through q-axis current. The d-q transform of phase currents were possible by the Fourier series summation method. Consequently, the speed control for high-performance BLDC motor drives become improved. The simulation results for BLDC motor drive systems confirm the validity of the proposed method.","PeriodicalId":236199,"journal":{"name":"IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03.","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115379630","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 : 2003-06-15DOI: 10.1109/PESC.2003.1218134
D. Lu, D. Cheng, Y. Lee
In this paper, a single-stage AC/DC power-factor-corrected voltage regulator (PFCVR), which permits a direct transfer of partial input power to the output after the first power process, is presented. This technique results in lower voltage stress on the intermediate bus storage capacitor and improved conversion efficiency while achieving high power factor. The duty ratio is a function of the load so that the bus voltage decreases when the load becomes light. Experimental results to verify the theoretical analysis and performance of the PFCVR are reported.
{"title":"A single-stage high power factor voltage regulator with reduced intermediate bus voltage stress","authors":"D. Lu, D. Cheng, Y. Lee","doi":"10.1109/PESC.2003.1218134","DOIUrl":"https://doi.org/10.1109/PESC.2003.1218134","url":null,"abstract":"In this paper, a single-stage AC/DC power-factor-corrected voltage regulator (PFCVR), which permits a direct transfer of partial input power to the output after the first power process, is presented. This technique results in lower voltage stress on the intermediate bus storage capacitor and improved conversion efficiency while achieving high power factor. The duty ratio is a function of the load so that the bus voltage decreases when the load becomes light. Experimental results to verify the theoretical analysis and performance of the PFCVR are reported.","PeriodicalId":236199,"journal":{"name":"IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03.","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121208936","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 : 2003-06-15DOI: 10.1109/PESC.2003.1216785
F. Luo, H. Ye
Voltage lift technique has been successfully employed in design of DC/DC converters, e.g. three series Luo-Converters. However, the output voltage increases in arithmetic progression. This paper introduces a novel approach super lift technique that implements the output voltage increasing in geometric progression. It effectively enhances voltage transfer gain in power-law.
{"title":"Negative output super-lift Luo-Converters","authors":"F. Luo, H. Ye","doi":"10.1109/PESC.2003.1216785","DOIUrl":"https://doi.org/10.1109/PESC.2003.1216785","url":null,"abstract":"Voltage lift technique has been successfully employed in design of DC/DC converters, e.g. three series Luo-Converters. However, the output voltage increases in arithmetic progression. This paper introduces a novel approach super lift technique that implements the output voltage increasing in geometric progression. It effectively enhances voltage transfer gain in power-law.","PeriodicalId":236199,"journal":{"name":"IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03.","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123536909","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 : 2003-06-15DOI: 10.1109/PESC.2003.1218133
D. Lee, J.H. Yang, B. Cho
A novel energy-recovery driver is proposed to efficiently drive a plasma display panel (PDP) in the sustaining operation. The proposed circuit can achieve zero-voltage switching (ZVS) for clamping switches and zero-current switching (ZCS) for resonant switches and diodes for all modes of operation. The charging/discharging energy of the panel capacitance can be recovered through the regenerative transformer without additional components.
{"title":"Novel energy-recovery driving circuit for plasma display panel using regenerative transformer","authors":"D. Lee, J.H. Yang, B. Cho","doi":"10.1109/PESC.2003.1218133","DOIUrl":"https://doi.org/10.1109/PESC.2003.1218133","url":null,"abstract":"A novel energy-recovery driver is proposed to efficiently drive a plasma display panel (PDP) in the sustaining operation. The proposed circuit can achieve zero-voltage switching (ZVS) for clamping switches and zero-current switching (ZCS) for resonant switches and diodes for all modes of operation. The charging/discharging energy of the panel capacitance can be recovered through the regenerative transformer without additional components.","PeriodicalId":236199,"journal":{"name":"IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03.","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121393572","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 : 2003-06-15DOI: 10.1109/PESC.2003.1218178
L. Palma, P. Enjeti, J. Howze
In this paper an approach to improve battery run-time in mobile applications with supercapacitors is explored. The performance of a battery-supercapacitor combination is analytically described using simplified equivalent circuit models. It is shown that there is an overall reduction in the internal losses and this translates into increased run-time. Three possible approaches are explored: (a) supercapacitors connected directly across the battery; (b) battery-inductor-supercapacitor connection; and (c) supercapacitor, and battery connected via a DC-DC converter. Analytical models, simulation and experimental results on a typical laptop computer are presented. These results show an increase in runtime of 4-12% is achievable. Also from these results it is shown that the use of a DC-DC converter appears to be a cost effective option, since it allows the use of reduced number of capacitors while maintaining a comparable performance.
{"title":"An approach to improve battery run-time in mobile applications with supercapacitors","authors":"L. Palma, P. Enjeti, J. Howze","doi":"10.1109/PESC.2003.1218178","DOIUrl":"https://doi.org/10.1109/PESC.2003.1218178","url":null,"abstract":"In this paper an approach to improve battery run-time in mobile applications with supercapacitors is explored. The performance of a battery-supercapacitor combination is analytically described using simplified equivalent circuit models. It is shown that there is an overall reduction in the internal losses and this translates into increased run-time. Three possible approaches are explored: (a) supercapacitors connected directly across the battery; (b) battery-inductor-supercapacitor connection; and (c) supercapacitor, and battery connected via a DC-DC converter. Analytical models, simulation and experimental results on a typical laptop computer are presented. These results show an increase in runtime of 4-12% is achievable. Also from these results it is shown that the use of a DC-DC converter appears to be a cost effective option, since it allows the use of reduced number of capacitors while maintaining a comparable performance.","PeriodicalId":236199,"journal":{"name":"IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03.","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125231240","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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