Pub Date : 1999-06-27DOI: 10.1109/PESC.1999.785620
A. Ferreres, J. A. Carrasco, E. Sanchis, J. Espí, E. Maset
Techniques based in parallel post-regulation eliminate cross-regulation between the different outputs of multi-output converters and achieve good efficiency by handling only a percentage of the power delivered to the output. This work describes a simple implementation of such a regulation mechanism in a two output forward converter. Moreover, the development of a complete steady state and low signal model ensures proper design and implementation. The model shows the inherent simplicity of the regulation procedure, similar to that of classical PWM regulators.
{"title":"Application of a novel parallel regulation technique in a two output forward converter","authors":"A. Ferreres, J. A. Carrasco, E. Sanchis, J. Espí, E. Maset","doi":"10.1109/PESC.1999.785620","DOIUrl":"https://doi.org/10.1109/PESC.1999.785620","url":null,"abstract":"Techniques based in parallel post-regulation eliminate cross-regulation between the different outputs of multi-output converters and achieve good efficiency by handling only a percentage of the power delivered to the output. This work describes a simple implementation of such a regulation mechanism in a two output forward converter. Moreover, the development of a complete steady state and low signal model ensures proper design and implementation. The model shows the inherent simplicity of the regulation procedure, similar to that of classical PWM regulators.","PeriodicalId":292317,"journal":{"name":"30th Annual IEEE Power Electronics Specialists Conference. Record. (Cat. No.99CH36321)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126182841","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 : 1999-06-27DOI: 10.1109/PESC.1999.788999
M. Ziegler, W. Hofmann
The paper proposes an implementation of a two steps commutated matrix converter. Switching patterns are presented which guarantee safe control of bidirectional switches during a change of the sign of a line to line input voltage. A simple control of the output current is possible without adding any additional snubber circuit.
{"title":"Implementation of a two steps commutated matrix converter","authors":"M. Ziegler, W. Hofmann","doi":"10.1109/PESC.1999.788999","DOIUrl":"https://doi.org/10.1109/PESC.1999.788999","url":null,"abstract":"The paper proposes an implementation of a two steps commutated matrix converter. Switching patterns are presented which guarantee safe control of bidirectional switches during a change of the sign of a line to line input voltage. A simple control of the output current is possible without adding any additional snubber circuit.","PeriodicalId":292317,"journal":{"name":"30th Annual IEEE Power Electronics Specialists Conference. Record. (Cat. No.99CH36321)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128196778","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 : 1999-06-27DOI: 10.1109/PESC.1999.788997
Z. Ye, D. Boroyevich, K. Xing, F. Lee
In this work, the issue of load sharing between parallel-connected three-phase PWM boost rectifiers is analyzed. In order to achieve independence between the rectifiers to facilitate standardized module design, the droop method is adopted. Traditionally, the method involves a trade-off between voltage regulation and load sharing. After parametric analysis, a novel droop method is proposed to avoid those limitations by using the gain scheduling technique. The analysis shows that the proposed method can achieve both good voltage regulation and good load sharing. The source output impedance of the proposed method is also proven to be better than that of the commonly used master/slave method.
{"title":"Design of parallel sources in DC distributed power systems by using gain-scheduling technique","authors":"Z. Ye, D. Boroyevich, K. Xing, F. Lee","doi":"10.1109/PESC.1999.788997","DOIUrl":"https://doi.org/10.1109/PESC.1999.788997","url":null,"abstract":"In this work, the issue of load sharing between parallel-connected three-phase PWM boost rectifiers is analyzed. In order to achieve independence between the rectifiers to facilitate standardized module design, the droop method is adopted. Traditionally, the method involves a trade-off between voltage regulation and load sharing. After parametric analysis, a novel droop method is proposed to avoid those limitations by using the gain scheduling technique. The analysis shows that the proposed method can achieve both good voltage regulation and good load sharing. The source output impedance of the proposed method is also proven to be better than that of the commonly used master/slave method.","PeriodicalId":292317,"journal":{"name":"30th Annual IEEE Power Electronics Specialists Conference. Record. (Cat. No.99CH36321)","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122735576","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 : 1999-06-27DOI: 10.1109/PESC.1999.789033
C. Zhang, N. Xu, Z. Chen
A novel design concept for achieving superior performance of ring anode-short GTO is presented in this paper. The compensated ring anode-short is based on the nonuniform ring short pattern on the anode-side to compensate the effect of nonuniform distribution of gate turn-off reverse voltage re-biased on the cathode-side. By additional local lifetime killer of proton irradiation, the new design i.e. compensated ring anode-short, enables us to attain better turn-off performance when compared to conventional uniform ring anode-short, resulting in high turn-off ability and low tail current for high current GTOs. Experimental and manufactured devices are presented to verify the new concept.
{"title":"Power GTO with compensated ring anode short","authors":"C. Zhang, N. Xu, Z. Chen","doi":"10.1109/PESC.1999.789033","DOIUrl":"https://doi.org/10.1109/PESC.1999.789033","url":null,"abstract":"A novel design concept for achieving superior performance of ring anode-short GTO is presented in this paper. The compensated ring anode-short is based on the nonuniform ring short pattern on the anode-side to compensate the effect of nonuniform distribution of gate turn-off reverse voltage re-biased on the cathode-side. By additional local lifetime killer of proton irradiation, the new design i.e. compensated ring anode-short, enables us to attain better turn-off performance when compared to conventional uniform ring anode-short, resulting in high turn-off ability and low tail current for high current GTOs. Experimental and manufactured devices are presented to verify the new concept.","PeriodicalId":292317,"journal":{"name":"30th Annual IEEE Power Electronics Specialists Conference. Record. (Cat. No.99CH36321)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131305201","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 : 1999-06-27DOI: 10.1109/PESC.1999.785575
A. Brambilla, M. Gambarara, A. Garutti, F. Ronchi
The present trend for commercial telecommunication and scientific satellites is the utilization of standard platform, characterized by a high level of flexibility and reduced nonrecurring costs. One of the areas where flexibility is mandatory is the electrical primary power subsystem, due to the impact on solar array configuration and dimensions and on power conditioning unit. Use of the maximum power point tracker (MPPT) concept allows optimization of the above mentioned subsystem, maximizing the power transfer from the photovoltaic generator. The purpose of the paper is to present a new MPPT approach that allows minimization of the drawback caused by the intrinsic capacitance of the photovoltaic array (generally neglected) giving the possibility of operation with a large degree of freedom, independent from the converter topology and photovoltaic power generator, electrical network and technology.
{"title":"New approach to photovoltaic arrays maximum power point tracking","authors":"A. Brambilla, M. Gambarara, A. Garutti, F. Ronchi","doi":"10.1109/PESC.1999.785575","DOIUrl":"https://doi.org/10.1109/PESC.1999.785575","url":null,"abstract":"The present trend for commercial telecommunication and scientific satellites is the utilization of standard platform, characterized by a high level of flexibility and reduced nonrecurring costs. One of the areas where flexibility is mandatory is the electrical primary power subsystem, due to the impact on solar array configuration and dimensions and on power conditioning unit. Use of the maximum power point tracker (MPPT) concept allows optimization of the above mentioned subsystem, maximizing the power transfer from the photovoltaic generator. The purpose of the paper is to present a new MPPT approach that allows minimization of the drawback caused by the intrinsic capacitance of the photovoltaic array (generally neglected) giving the possibility of operation with a large degree of freedom, independent from the converter topology and photovoltaic power generator, electrical network and technology.","PeriodicalId":292317,"journal":{"name":"30th Annual IEEE Power Electronics Specialists Conference. Record. (Cat. No.99CH36321)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126486593","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 : 1999-06-27DOI: 10.1109/PESC.1999.785627
T. Halkosaari, H. Tuusa
EMC issues have been increasingly discussed. In adjustable speed PWM AC drives problems occur due to leakage currents, i.e. common mode currents resulting from the high motor voltage du/dt values versus the ground. These currents flow through the parasitic capacitance of the motor cable and the motor windings. In this paper an innovative low cost solution to mitigate common mode currents in a PWM current source inverter is proposed. The results are verified by Pspice(R) simulations.
{"title":"Reduction of conducted emissions and motor bearing currents in current source PWM inverter drives","authors":"T. Halkosaari, H. Tuusa","doi":"10.1109/PESC.1999.785627","DOIUrl":"https://doi.org/10.1109/PESC.1999.785627","url":null,"abstract":"EMC issues have been increasingly discussed. In adjustable speed PWM AC drives problems occur due to leakage currents, i.e. common mode currents resulting from the high motor voltage du/dt values versus the ground. These currents flow through the parasitic capacitance of the motor cable and the motor windings. In this paper an innovative low cost solution to mitigate common mode currents in a PWM current source inverter is proposed. The results are verified by Pspice(R) simulations.","PeriodicalId":292317,"journal":{"name":"30th Annual IEEE Power Electronics Specialists Conference. Record. (Cat. No.99CH36321)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128320181","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 : 1999-06-27DOI: 10.1109/PESC.1999.789040
Zhuolin Ye, M. Pong, W. Lo, K.H. Yuen
This paper presents a method to predict the harmonic current level of traction system with phase-controlled DC motor drives by Monte Carlo simulation. Based on the behavioral modeling technique (BMT), a model for electrical unit of traction is proposed. The probability density functions (PDF) of speed and notch numbers are obtained from long-term field measurement. The mean and variance of harmonic current of a single electrical unit is obtained based on the speed PDF and traction electrical unit model. The results of Monte Carlo simulation are in good accordance with the experimental and analytical conclusions. The harmonics of a different number of trains are systematically investigated. It is shown the total harmonic distortion decreases with the increase of the number of trains and the harmonic current per train decreases with the train number because of the harmonic cancellation.
{"title":"Harmonic evaluation of traction system by Monte Carlo simulation","authors":"Zhuolin Ye, M. Pong, W. Lo, K.H. Yuen","doi":"10.1109/PESC.1999.789040","DOIUrl":"https://doi.org/10.1109/PESC.1999.789040","url":null,"abstract":"This paper presents a method to predict the harmonic current level of traction system with phase-controlled DC motor drives by Monte Carlo simulation. Based on the behavioral modeling technique (BMT), a model for electrical unit of traction is proposed. The probability density functions (PDF) of speed and notch numbers are obtained from long-term field measurement. The mean and variance of harmonic current of a single electrical unit is obtained based on the speed PDF and traction electrical unit model. The results of Monte Carlo simulation are in good accordance with the experimental and analytical conclusions. The harmonics of a different number of trains are systematically investigated. It is shown the total harmonic distortion decreases with the increase of the number of trains and the harmonic current per train decreases with the train number because of the harmonic cancellation.","PeriodicalId":292317,"journal":{"name":"30th Annual IEEE Power Electronics Specialists Conference. Record. (Cat. No.99CH36321)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130573127","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 : 1999-06-27DOI: 10.1109/PESC.1999.785596
Haiyan Lu, Jianguo Zhu, V. Ramsden, S. Hui
This paper proposes an approach to incorporate stray capacitances into a dynamic circuit model of high frequency transformers. The measuring techniques for stray capacitances in high frequency transformers and inductors are presented. A 500 W transformer in a full bridge inverter operating at 25 kHz has been simulated with the new model and the theoretical results are confirmed by experiments.
{"title":"Measurement and modeling of stray capacitances in high frequency transformers","authors":"Haiyan Lu, Jianguo Zhu, V. Ramsden, S. Hui","doi":"10.1109/PESC.1999.785596","DOIUrl":"https://doi.org/10.1109/PESC.1999.785596","url":null,"abstract":"This paper proposes an approach to incorporate stray capacitances into a dynamic circuit model of high frequency transformers. The measuring techniques for stray capacitances in high frequency transformers and inductors are presented. A 500 W transformer in a full bridge inverter operating at 25 kHz has been simulated with the new model and the theoretical results are confirmed by experiments.","PeriodicalId":292317,"journal":{"name":"30th Annual IEEE Power Electronics Specialists Conference. Record. (Cat. No.99CH36321)","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124631610","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 : 1999-06-27DOI: 10.1109/PESC.1999.789037
S. Chiang, J. Chang
This paper presents a multi-module parallelable three-phase active power filter to solve the problems of capacity enlargement and load unbalance compensation encountered by the shunt APF with A three-arm topology. Systematic design procedures of the complete system are described and some simulated and experimental results are provided for demonstrating the effectiveness of the proposed approach.
{"title":"Design and implementation of the parallelable active power filter","authors":"S. Chiang, J. Chang","doi":"10.1109/PESC.1999.789037","DOIUrl":"https://doi.org/10.1109/PESC.1999.789037","url":null,"abstract":"This paper presents a multi-module parallelable three-phase active power filter to solve the problems of capacity enlargement and load unbalance compensation encountered by the shunt APF with A three-arm topology. Systematic design procedures of the complete system are described and some simulated and experimental results are provided for demonstrating the effectiveness of the proposed approach.","PeriodicalId":292317,"journal":{"name":"30th Annual IEEE Power Electronics Specialists Conference. Record. (Cat. No.99CH36321)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130297158","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 : 1999-06-27DOI: 10.1109/PESC.1999.789014
E. Deschamps, I. Barbi
This paper introduces an isolated DC-to-DC converter which features half of the input voltage across the switches, zero-voltage-switching, operation at constant frequency and regulation by pulse-width-modulation. The converter is an alternative to the full-bridge ZVS-PWM DC-to-DC converter in high voltage and high power applications. The complete operating principle, theoretical analysis, relevant equations and design example are provided in this paper. The experimental results of a 1.5 kW converter with 60 V, 25 A output, 600 V input, operating at 50 kHz switching frequency are presented and discussed.
{"title":"An isolated ZVS-PWM DC-to-DC converter with half of the input voltage across the switches","authors":"E. Deschamps, I. Barbi","doi":"10.1109/PESC.1999.789014","DOIUrl":"https://doi.org/10.1109/PESC.1999.789014","url":null,"abstract":"This paper introduces an isolated DC-to-DC converter which features half of the input voltage across the switches, zero-voltage-switching, operation at constant frequency and regulation by pulse-width-modulation. The converter is an alternative to the full-bridge ZVS-PWM DC-to-DC converter in high voltage and high power applications. The complete operating principle, theoretical analysis, relevant equations and design example are provided in this paper. The experimental results of a 1.5 kW converter with 60 V, 25 A output, 600 V input, operating at 50 kHz switching frequency are presented and discussed.","PeriodicalId":292317,"journal":{"name":"30th Annual IEEE Power Electronics Specialists Conference. Record. (Cat. No.99CH36321)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133945899","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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