Pub Date : 1996-06-23DOI: 10.1109/PESC.1996.548617
R. Lin, F. Lee
A new family of zero-current-switching-zero-voltage-switching (ZCSZVS) pulse-width-modulation (PWM) converters are proposed. With the proposed ZCSZVS concept, the PSPICE simulation results of the application to a single-switch three-phase PFC rectifier have been obtained and compared with those of hard-switching and ZCT applications in order to show the excellent performance of the proposed ZCSZVS concept.
{"title":"Novel zero-current-switching-zero-voltage-switching converters","authors":"R. Lin, F. Lee","doi":"10.1109/PESC.1996.548617","DOIUrl":"https://doi.org/10.1109/PESC.1996.548617","url":null,"abstract":"A new family of zero-current-switching-zero-voltage-switching (ZCSZVS) pulse-width-modulation (PWM) converters are proposed. With the proposed ZCSZVS concept, the PSPICE simulation results of the application to a single-switch three-phase PFC rectifier have been obtained and compared with those of hard-switching and ZCT applications in order to show the excellent performance of the proposed ZCSZVS concept.","PeriodicalId":19979,"journal":{"name":"PESC Record. 27th Annual IEEE Power Electronics Specialists Conference","volume":"7 1","pages":"438-442 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1996-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87655683","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 : 1996-06-23DOI: 10.1109/PESC.1996.548596
D. K. Jackson, S. Leeb, A. Mitwalli, P. Narváez, D. Fusco, E. Lupton
Properly fabricated polymer gels exhibit an abrupt change in volume in response to a small change in an environmental parameter such as temperature. We have developed gels that change volume in response to an applied alternating magnetic field, and we are working to apply these gels as actuators. This paper describes power electronic circuits suitable for electromagnetic activation of these polymer gels. Issues in the selection of circuit topologies for this application are discussed. Experimental results are presented, which demonstrate magnetic activation of gels using prototype power electronic drives.
{"title":"Power electronic drives for magnetically triggered phase transition gels","authors":"D. K. Jackson, S. Leeb, A. Mitwalli, P. Narváez, D. Fusco, E. Lupton","doi":"10.1109/PESC.1996.548596","DOIUrl":"https://doi.org/10.1109/PESC.1996.548596","url":null,"abstract":"Properly fabricated polymer gels exhibit an abrupt change in volume in response to a small change in an environmental parameter such as temperature. We have developed gels that change volume in response to an applied alternating magnetic field, and we are working to apply these gels as actuators. This paper describes power electronic circuits suitable for electromagnetic activation of these polymer gels. Issues in the selection of circuit topologies for this application are discussed. Experimental results are presented, which demonstrate magnetic activation of gels using prototype power electronic drives.","PeriodicalId":19979,"journal":{"name":"PESC Record. 27th Annual IEEE Power Electronics Specialists Conference","volume":"156 1","pages":"302-309 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1996-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79874260","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 : 1996-06-23DOI: 10.1109/PESC.1996.548763
E. Tatakis, N. Polyzos
The behaviour of ZVS-QRCs (quasi-resonant power converters), analyzed in previously published works is based on the assumption of equal input and output energies. Nevertheless measurements on experimental circuits demonstrate an important deviation between the results of theoretical analyses and the real behavioral characteristics of such power converters. In this paper, a novel method to approximate the behavioral characteristics of ZVS-QRCs is analyzed and an experimental study of different ZVS-QR topologies is presented. The main reasons for the discrepancy between theoretical and real characteristics are discussed.
{"title":"A novel approach to evaluate the behavioral characteristics of zero-voltage switching quasi-resonant converters","authors":"E. Tatakis, N. Polyzos","doi":"10.1109/PESC.1996.548763","DOIUrl":"https://doi.org/10.1109/PESC.1996.548763","url":null,"abstract":"The behaviour of ZVS-QRCs (quasi-resonant power converters), analyzed in previously published works is based on the assumption of equal input and output energies. Nevertheless measurements on experimental circuits demonstrate an important deviation between the results of theoretical analyses and the real behavioral characteristics of such power converters. In this paper, a novel method to approximate the behavioral characteristics of ZVS-QRCs is analyzed and an experimental study of different ZVS-QR topologies is presented. The main reasons for the discrepancy between theoretical and real characteristics are discussed.","PeriodicalId":19979,"journal":{"name":"PESC Record. 27th Annual IEEE Power Electronics Specialists Conference","volume":"88 1","pages":"1388-1393 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1996-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79893227","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 : 1996-06-23DOI: 10.1109/PESC.1996.548554
Z. Hossain, E. Yang, V. Temple, C.L. Ma, K. Olejniczak
This paper presents a physics-based model of MOS controlled thyristors (MCT) using the lumped-charge modeling technique. As a relatively new power semiconductor device, little effort has been made thus far in creating an accurate model used for simulation. The only MCT model available to date is that based on the two bipolar transistor-behavioral subcircuit model. This model works well for static operation, but it has limitations in predicting the dynamic behavior of the device due to the omission of the internal device physics. The use of the lumped-charge modeling technique facilitates the inclusion of internal physical processes and the structural geometry of the device into the model. As a result, this technique provides a more realistic and accurate model than any other presently available. This model is verified through Saber(R) simulation and experimental results.
{"title":"An MCT circuit model using the lumped-charge modeling technique","authors":"Z. Hossain, E. Yang, V. Temple, C.L. Ma, K. Olejniczak","doi":"10.1109/PESC.1996.548554","DOIUrl":"https://doi.org/10.1109/PESC.1996.548554","url":null,"abstract":"This paper presents a physics-based model of MOS controlled thyristors (MCT) using the lumped-charge modeling technique. As a relatively new power semiconductor device, little effort has been made thus far in creating an accurate model used for simulation. The only MCT model available to date is that based on the two bipolar transistor-behavioral subcircuit model. This model works well for static operation, but it has limitations in predicting the dynamic behavior of the device due to the omission of the internal device physics. The use of the lumped-charge modeling technique facilitates the inclusion of internal physical processes and the structural geometry of the device into the model. As a result, this technique provides a more realistic and accurate model than any other presently available. This model is verified through Saber(R) simulation and experimental results.","PeriodicalId":19979,"journal":{"name":"PESC Record. 27th Annual IEEE Power Electronics Specialists Conference","volume":"9 1","pages":"23-28 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1996-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79910287","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 : 1996-06-23DOI: 10.1109/PESC.1996.548562
G. Moschopoulos, P. Jain, Yanfei Liu, G. Joós
A zero-voltage switched (ZVS) PWM boost converter with an energy feedforward auxiliary circuit is proposed in this paper. This converter can be operated with PWM control because ZVS operation is achieved with an auxiliary resonant circuit that has few switching losses and handles much less power than the main power circuit as it is activated for only a small fraction of the switching cycle. Moreover, peak switch stresses are lower than those found in other proposed converters because some of the energy circulating in the auxiliary circuit is fed to the load. In the paper, the modes of converter operation are explained and analyzed, design guidelines are given, and experimental results are presented.
{"title":"A zero-voltage switched PWM boost converter with an energy feedforward auxiliary circuit","authors":"G. Moschopoulos, P. Jain, Yanfei Liu, G. Joós","doi":"10.1109/PESC.1996.548562","DOIUrl":"https://doi.org/10.1109/PESC.1996.548562","url":null,"abstract":"A zero-voltage switched (ZVS) PWM boost converter with an energy feedforward auxiliary circuit is proposed in this paper. This converter can be operated with PWM control because ZVS operation is achieved with an auxiliary resonant circuit that has few switching losses and handles much less power than the main power circuit as it is activated for only a small fraction of the switching cycle. Moreover, peak switch stresses are lower than those found in other proposed converters because some of the energy circulating in the auxiliary circuit is fed to the load. In the paper, the modes of converter operation are explained and analyzed, design guidelines are given, and experimental results are presented.","PeriodicalId":19979,"journal":{"name":"PESC Record. 27th Annual IEEE Power Electronics Specialists Conference","volume":"104 1","pages":"76-82 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1996-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80470873","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 : 1996-06-23DOI: 10.1109/PESC.1996.548753
D. Shmilovitz, S. Singer
A conceptual approach for pulsed power generation is described in this paper. This approach is based on the fact that the time of appearance of a voltage pulse traveling on a channel is directly proportional to the electrical length of the channel. Thus, if power pulses are fed into the inputs of a group of transmission lines sequentially, they may reach the end points simultaneously, if certain measures are taken. The first pulse should be applied to the input terminals of the longest transmission line, the second to the next, shorter transmission line and so on, the last pulse in the cycle is fed into the shortest transmission line. If the system is composed of m transmission line segments, the difference in the electrical length from line to line should be T/m, where T denotes the period of the cycle. The output peak power will be m times higher than the input peak power, due to either a rise in voltage, in current, or a combination of both. The current/voltage magnification would be defined by the choice of a suitable connection mode at the end points. The main advantages of the transmission line based topology are: (a) the switching elements the system consists of need to withstand a much lower power than the power experienced by the load, and (b) the system can operate either at extremely high frequencies or with very short rise and decay times of rectangular pulses.
{"title":"Energy compression by means of a switched mode topology of transmission lines","authors":"D. Shmilovitz, S. Singer","doi":"10.1109/PESC.1996.548753","DOIUrl":"https://doi.org/10.1109/PESC.1996.548753","url":null,"abstract":"A conceptual approach for pulsed power generation is described in this paper. This approach is based on the fact that the time of appearance of a voltage pulse traveling on a channel is directly proportional to the electrical length of the channel. Thus, if power pulses are fed into the inputs of a group of transmission lines sequentially, they may reach the end points simultaneously, if certain measures are taken. The first pulse should be applied to the input terminals of the longest transmission line, the second to the next, shorter transmission line and so on, the last pulse in the cycle is fed into the shortest transmission line. If the system is composed of m transmission line segments, the difference in the electrical length from line to line should be T/m, where T denotes the period of the cycle. The output peak power will be m times higher than the input peak power, due to either a rise in voltage, in current, or a combination of both. The current/voltage magnification would be defined by the choice of a suitable connection mode at the end points. The main advantages of the transmission line based topology are: (a) the switching elements the system consists of need to withstand a much lower power than the power experienced by the load, and (b) the system can operate either at extremely high frequencies or with very short rise and decay times of rectangular pulses.","PeriodicalId":19979,"journal":{"name":"PESC Record. 27th Annual IEEE Power Electronics Specialists Conference","volume":"85 1","pages":"1323-1328 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1996-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80663296","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 : 1996-06-23DOI: 10.1109/PESC.1996.548576
E. Mehl, I. Barbi
The analysis of a new three-phase rectifier with high power factor is presented in this paper, in view of a complete design procedure. The main features of the proposed circuit are low cost, small size, high efficiency and simplicity. With the introduction of the "critical inductance" of the converter, the circuit can be analyzed by a simplified equivalent circuit. A set of linear equations was derived, modeling the input current of the rectifier and demonstrating the high power factor and low harmonic distortion characteristics of the circuit. The theoretical analysis was validated with simulation and experimental results obtained from two laboratory prototypes rated at 7 kW and 12 kW, connected to the 220 V, 60 Hz AC system.
{"title":"Design oriented analysis of a high power factor and low cost three-phase rectifier","authors":"E. Mehl, I. Barbi","doi":"10.1109/PESC.1996.548576","DOIUrl":"https://doi.org/10.1109/PESC.1996.548576","url":null,"abstract":"The analysis of a new three-phase rectifier with high power factor is presented in this paper, in view of a complete design procedure. The main features of the proposed circuit are low cost, small size, high efficiency and simplicity. With the introduction of the \"critical inductance\" of the converter, the circuit can be analyzed by a simplified equivalent circuit. A set of linear equations was derived, modeling the input current of the rectifier and demonstrating the high power factor and low harmonic distortion characteristics of the circuit. The theoretical analysis was validated with simulation and experimental results obtained from two laboratory prototypes rated at 7 kW and 12 kW, connected to the 220 V, 60 Hz AC system.","PeriodicalId":19979,"journal":{"name":"PESC Record. 27th Annual IEEE Power Electronics Specialists Conference","volume":"08 1","pages":"165-170 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1996-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90233046","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 : 1996-06-23DOI: 10.1109/PESC.1996.548761
M. di Bernardo, F. Garofalo, L. Glielmo, F. Vasca
Quasi-periodicity and nonlinear phenomena in open and closed loop boost PWM DC/DC power converters are analysed. A new discrete time nonlinear mapping, the impact map, which models closed loop DC/DC power converters is presented and compared with the usual stroboscopic map. Also, it is shown that the power converter can exhibit complicate periodic behavior and quasi-periodicity both in open loop, when stimulated by a suitable external sinusoidal disturbance, and in closed loop with an appropriate choice of the state feedback gains. Simulation results show that in the closed loop case Naimarck-Sacker bifurcation and self-sustained tori can be obtained.
{"title":"Quasi-periodic behaviors in DC/DC converters","authors":"M. di Bernardo, F. Garofalo, L. Glielmo, F. Vasca","doi":"10.1109/PESC.1996.548761","DOIUrl":"https://doi.org/10.1109/PESC.1996.548761","url":null,"abstract":"Quasi-periodicity and nonlinear phenomena in open and closed loop boost PWM DC/DC power converters are analysed. A new discrete time nonlinear mapping, the impact map, which models closed loop DC/DC power converters is presented and compared with the usual stroboscopic map. Also, it is shown that the power converter can exhibit complicate periodic behavior and quasi-periodicity both in open loop, when stimulated by a suitable external sinusoidal disturbance, and in closed loop with an appropriate choice of the state feedback gains. Simulation results show that in the closed loop case Naimarck-Sacker bifurcation and self-sustained tori can be obtained.","PeriodicalId":19979,"journal":{"name":"PESC Record. 27th Annual IEEE Power Electronics Specialists Conference","volume":"101 1","pages":"1376-1381 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1996-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91094042","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 : 1996-06-23DOI: 10.1109/PESC.1996.548558
N. Talwalkar, P. Lauritzen, B. Fatemizadeh, D. Perlman, C.L. Ma
The power BJT is modeled using the lumped-charge method using simplified forms of the Poisson's equation, the continuity equation and the Boltzmann relation. All important one-dimensional effects are included in the model. Only nine parameters are needed to completely specify the model except for junction capacitances and parasitic resistances. This model can be easily extended to make a BJT Darlington model.
{"title":"A power BJT model for circuit simulation","authors":"N. Talwalkar, P. Lauritzen, B. Fatemizadeh, D. Perlman, C.L. Ma","doi":"10.1109/PESC.1996.548558","DOIUrl":"https://doi.org/10.1109/PESC.1996.548558","url":null,"abstract":"The power BJT is modeled using the lumped-charge method using simplified forms of the Poisson's equation, the continuity equation and the Boltzmann relation. All important one-dimensional effects are included in the model. Only nine parameters are needed to completely specify the model except for junction capacitances and parasitic resistances. This model can be easily extended to make a BJT Darlington model.","PeriodicalId":19979,"journal":{"name":"PESC Record. 27th Annual IEEE Power Electronics Specialists Conference","volume":"22 1","pages":"50-55 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1996-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80911669","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 : 1996-06-23DOI: 10.1109/PESC.1996.548700
A. Katsuki, M. Matsushima, M. Ouchiyama
A detailed analysis is presented of our original overload-protected current-feedback magnetic multivibrator. Since current-feedback magnetic multivibrators are highly efficient and are suitable for high-frequency operation, they are widely used as power sources for electronic equipment. Unlike voltage-feedback multivibrators, however, their circuits have no ability to protect themselves from overloading. We therefore proposed a new current-feedback multivibrator with overload protection. In this paper, the conditions for cessation of oscillation are derived by using our model of bipolar junction transistors. This model takes account of power dissipation, because the common-emitter static forward current transfer ratio depends on the collector current and the junction temperature.
{"title":"Analysis of an overload-protected current-feedback magnetic multivibrator","authors":"A. Katsuki, M. Matsushima, M. Ouchiyama","doi":"10.1109/PESC.1996.548700","DOIUrl":"https://doi.org/10.1109/PESC.1996.548700","url":null,"abstract":"A detailed analysis is presented of our original overload-protected current-feedback magnetic multivibrator. Since current-feedback magnetic multivibrators are highly efficient and are suitable for high-frequency operation, they are widely used as power sources for electronic equipment. Unlike voltage-feedback multivibrators, however, their circuits have no ability to protect themselves from overloading. We therefore proposed a new current-feedback multivibrator with overload protection. In this paper, the conditions for cessation of oscillation are derived by using our model of bipolar junction transistors. This model takes account of power dissipation, because the common-emitter static forward current transfer ratio depends on the collector current and the junction temperature.","PeriodicalId":19979,"journal":{"name":"PESC Record. 27th Annual IEEE Power Electronics Specialists Conference","volume":"68 1","pages":"975-980 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1996-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74491356","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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