Pub Date : 1997-02-23DOI: 10.1109/APEC.1997.581474
L. Gonthier, F. Bernot, A. Berthon
In this paper, a new DC/AC/AC converter for variable speed AC drives using soft commutation technique is described. It consists of a dual-thyristor voltage inverter connected to cycle-converters. It combines the advantages of a soft commutated converter and those of PWM control (constant commutation frequency, simple control). The discussed converter is realised with IGBTs; it supplies trapezoidal currents to a three-phase 18 kW brushless permanent magnet motor, with 20 kHz chopping output frequency. The paper focuses on the start and stop transients.
{"title":"High efficiency 18 kW HF link, three-phase, soft commutated DC-AC-AC converter (study of start and stop operations)","authors":"L. Gonthier, F. Bernot, A. Berthon","doi":"10.1109/APEC.1997.581474","DOIUrl":"https://doi.org/10.1109/APEC.1997.581474","url":null,"abstract":"In this paper, a new DC/AC/AC converter for variable speed AC drives using soft commutation technique is described. It consists of a dual-thyristor voltage inverter connected to cycle-converters. It combines the advantages of a soft commutated converter and those of PWM control (constant commutation frequency, simple control). The discussed converter is realised with IGBTs; it supplies trapezoidal currents to a three-phase 18 kW brushless permanent magnet motor, with 20 kHz chopping output frequency. The paper focuses on the start and stop transients.","PeriodicalId":423659,"journal":{"name":"Proceedings of APEC 97 - Applied Power Electronics Conference","volume":"323 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132529550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-02-23DOI: 10.1109/APEC.1997.581472
Y. Xiao, B. Wu, N. Zargari, R. Sotudeh
The input power factor of GTO PWM current source rectifiers using a delay angle control scheme is investigated. It is discovered that with an optimal design of line and motor side capacitors for CSR-CSI induction motor drives having fan/pump loads, the input power factor is close to unity (over 0.95 for 30% to 100% of rated load). The concept of near unity power factor operation is presented. The procedures for the capacitor design are discussed. A switching pattern suitable for the delay angle control with a low harmonic distortion is also introduced. The line current of the rectifier is near sinusoidal due to the use of the switching pattern and line side capacitor. Experimental results on a 5 HP drive are given to verify the theoretical analysis.
{"title":"Design of line/motor side capacitors for PWM CSR-CSI drives to achieve optimal power factor in high power fan/pump applications","authors":"Y. Xiao, B. Wu, N. Zargari, R. Sotudeh","doi":"10.1109/APEC.1997.581472","DOIUrl":"https://doi.org/10.1109/APEC.1997.581472","url":null,"abstract":"The input power factor of GTO PWM current source rectifiers using a delay angle control scheme is investigated. It is discovered that with an optimal design of line and motor side capacitors for CSR-CSI induction motor drives having fan/pump loads, the input power factor is close to unity (over 0.95 for 30% to 100% of rated load). The concept of near unity power factor operation is presented. The procedures for the capacitor design are discussed. A switching pattern suitable for the delay angle control with a low harmonic distortion is also introduced. The line current of the rectifier is near sinusoidal due to the use of the switching pattern and line side capacitor. Experimental results on a 5 HP drive are given to verify the theoretical analysis.","PeriodicalId":423659,"journal":{"name":"Proceedings of APEC 97 - Applied Power Electronics Conference","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114309752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-02-23DOI: 10.1109/APEC.1997.581495
N. Ismail, P. Jain, H. Soin
This paper presents a new single stage power factor corrected full bridge AC/DC converter operated with zero switching losses and has a simple control circuitry. This converter has only a few additional components compared to the nonpower factor corrected circuits: an additional transformer winding, small inductor and three diodes. This circuit allows the output voltage regulation and input current shaping with single stage and one control chip, Analytical, simulation and experimental results confirm the feasibility, and demonstrate the good efficiency and close to unity power factor.
{"title":"A power factor corrected single stage full bridge AC/DC converter topology with zero switching losses","authors":"N. Ismail, P. Jain, H. Soin","doi":"10.1109/APEC.1997.581495","DOIUrl":"https://doi.org/10.1109/APEC.1997.581495","url":null,"abstract":"This paper presents a new single stage power factor corrected full bridge AC/DC converter operated with zero switching losses and has a simple control circuitry. This converter has only a few additional components compared to the nonpower factor corrected circuits: an additional transformer winding, small inductor and three diodes. This circuit allows the output voltage regulation and input current shaping with single stage and one control chip, Analytical, simulation and experimental results confirm the feasibility, and demonstrate the good efficiency and close to unity power factor.","PeriodicalId":423659,"journal":{"name":"Proceedings of APEC 97 - Applied Power Electronics Conference","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134181634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-02-23DOI: 10.1109/APEC.1997.575772
Eun-Soo Kim, K. Joe, M. Kye, Yoo-Ho Kim, B. Yoon
The conventional high frequency phase-shifted full-bridge DC/DC power converter has a disadvantage that a circulating current flows through the transformer and switching devices during the freewheeling interval. Due to this circulating current, RMS current stress, conduction losses of transformer and switching devices are increased. To alleviate this problem, this paper provides a circulating current free-type high-frequency ZVZCS phase-shifted full bridge (FB) DC/DC power converter with an energy recovery snubber attached at the secondary side of transformer. The energy recovery snubber adopted in this study is consisted of three fast recovery diodes and two resonant capacitors.
{"title":"An improved ZVZCS PWM FB DC/DC converter using energy recovery snubber","authors":"Eun-Soo Kim, K. Joe, M. Kye, Yoo-Ho Kim, B. Yoon","doi":"10.1109/APEC.1997.575772","DOIUrl":"https://doi.org/10.1109/APEC.1997.575772","url":null,"abstract":"The conventional high frequency phase-shifted full-bridge DC/DC power converter has a disadvantage that a circulating current flows through the transformer and switching devices during the freewheeling interval. Due to this circulating current, RMS current stress, conduction losses of transformer and switching devices are increased. To alleviate this problem, this paper provides a circulating current free-type high-frequency ZVZCS phase-shifted full bridge (FB) DC/DC power converter with an energy recovery snubber attached at the secondary side of transformer. The energy recovery snubber adopted in this study is consisted of three fast recovery diodes and two resonant capacitors.","PeriodicalId":423659,"journal":{"name":"Proceedings of APEC 97 - Applied Power Electronics Conference","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116193969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-02-23DOI: 10.1109/APEC.1997.581473
C. Chan, K. Chau, Y. Li
An analysis on the DC link current of space-vector PWM AC drives using novel dead-time vector (DTV) concept has been presented. By employing the DTV, a bi-value function to quantify the polarities of three phase winding currents, inverter output voltages and DC link current at dead time state can be expressed in close vectored forms. Thus, the entire drive system is considered as a whole to investigate the characteristics of DC link current at both normal and dead time states during steady and transient operations, increasingly, a phenomenon of negative spikes on DC link current caused by dead time effect is newly observed and highlighted. This phenomenon can be accurately predicted and mathematically characterized by using the proposed DTV approach. Both computer simulation and experimental results have been used for verification.
{"title":"A novel dead-time vector approach to analysis of DC link current in PWM inverter drives","authors":"C. Chan, K. Chau, Y. Li","doi":"10.1109/APEC.1997.581473","DOIUrl":"https://doi.org/10.1109/APEC.1997.581473","url":null,"abstract":"An analysis on the DC link current of space-vector PWM AC drives using novel dead-time vector (DTV) concept has been presented. By employing the DTV, a bi-value function to quantify the polarities of three phase winding currents, inverter output voltages and DC link current at dead time state can be expressed in close vectored forms. Thus, the entire drive system is considered as a whole to investigate the characteristics of DC link current at both normal and dead time states during steady and transient operations, increasingly, a phenomenon of negative spikes on DC link current caused by dead time effect is newly observed and highlighted. This phenomenon can be accurately predicted and mathematically characterized by using the proposed DTV approach. Both computer simulation and experimental results have been used for verification.","PeriodicalId":423659,"journal":{"name":"Proceedings of APEC 97 - Applied Power Electronics Conference","volume":"840 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116424009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-02-23DOI: 10.1109/APEC.1997.581452
O. Schepp, M. Lenz
The authors present an analytical electrothermal model of an integrated full-bridge power converter for PSpice. It combines a thermal RC-network including thermal coupling between the DMOS devices with an electrothermal model for each DMOSFET. A comparison between thermal simulation and FEM analysis of an commercially available module is given and, as an application example, the authors show the simulation of switching on a DC motor with the full-bridge device and an approach to include basic printed circuit board characteristics into the simulation.
{"title":"A versatile electrothermal model of an integrated full bridge device taking into account various boundary conditions","authors":"O. Schepp, M. Lenz","doi":"10.1109/APEC.1997.581452","DOIUrl":"https://doi.org/10.1109/APEC.1997.581452","url":null,"abstract":"The authors present an analytical electrothermal model of an integrated full-bridge power converter for PSpice. It combines a thermal RC-network including thermal coupling between the DMOS devices with an electrothermal model for each DMOSFET. A comparison between thermal simulation and FEM analysis of an commercially available module is given and, as an application example, the authors show the simulation of switching on a DC motor with the full-bridge device and an approach to include basic printed circuit board characteristics into the simulation.","PeriodicalId":423659,"journal":{"name":"Proceedings of APEC 97 - Applied Power Electronics Conference","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121777386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-02-23DOI: 10.1109/APEC.1997.581487
K. Tazume, T. Aoki, T. Ogata
The proposed method for controlling an interconnection inverter and its input power was designed for inverters interconnecting a fuel cell with an engine generator. Experiments showed that this method suppresses the harmonic components of the engine generator output current and keeps the inverter input-power constant.
{"title":"Novel method for controlling an interconnection inverter operating as an active power filter and for controlling its input power","authors":"K. Tazume, T. Aoki, T. Ogata","doi":"10.1109/APEC.1997.581487","DOIUrl":"https://doi.org/10.1109/APEC.1997.581487","url":null,"abstract":"The proposed method for controlling an interconnection inverter and its input power was designed for inverters interconnecting a fuel cell with an engine generator. Experiments showed that this method suppresses the harmonic components of the engine generator output current and keeps the inverter input-power constant.","PeriodicalId":423659,"journal":{"name":"Proceedings of APEC 97 - Applied Power Electronics Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129580038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-02-23DOI: 10.1109/APEC.1997.575747
V. H. Prasad, D. Borojevic, R. Zhang
Three space vector modulation schemes are analyzed for a four-leg voltage source inverter. The analysis is performed with respect to switching losses and total harmonic distortion under both balanced and unbalanced load conditions over the entire range of modulation index values and over varying load power factor angle. The analysis has been verified using simulation.
{"title":"Analysis and comparison of space vector modulation schemes for a four-leg voltage source inverter","authors":"V. H. Prasad, D. Borojevic, R. Zhang","doi":"10.1109/APEC.1997.575747","DOIUrl":"https://doi.org/10.1109/APEC.1997.575747","url":null,"abstract":"Three space vector modulation schemes are analyzed for a four-leg voltage source inverter. The analysis is performed with respect to switching losses and total harmonic distortion under both balanced and unbalanced load conditions over the entire range of modulation index values and over varying load power factor angle. The analysis has been verified using simulation.","PeriodicalId":423659,"journal":{"name":"Proceedings of APEC 97 - Applied Power Electronics Conference","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121004129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-02-23DOI: 10.1109/APEC.1997.581454
S. Muthu, J.M.S. Kim
This paper presents the steady-state operating characteristics of unified active power filters (UAPFs). The UAPF is an integration of series and shunt active filters and has a unique approach towards the control of the series active filter for reactive power compensation. The principle characteristics of UAPFs are presented by way of analyzing steady-state operating conditions and identifying different modes of operation. Simulation results are provided to verify the analysis. The analytical results are useful for the selection of kVA ratings and optimal operating conditions of active filter components.
{"title":"Steady-state operating characteristics of unified active power filters","authors":"S. Muthu, J.M.S. Kim","doi":"10.1109/APEC.1997.581454","DOIUrl":"https://doi.org/10.1109/APEC.1997.581454","url":null,"abstract":"This paper presents the steady-state operating characteristics of unified active power filters (UAPFs). The UAPF is an integration of series and shunt active filters and has a unique approach towards the control of the series active filter for reactive power compensation. The principle characteristics of UAPFs are presented by way of analyzing steady-state operating conditions and identifying different modes of operation. Simulation results are provided to verify the analysis. The analytical results are useful for the selection of kVA ratings and optimal operating conditions of active filter components.","PeriodicalId":423659,"journal":{"name":"Proceedings of APEC 97 - Applied Power Electronics Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130888619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-02-23DOI: 10.1109/APEC.1997.581436
R. Redl
Due to its simplicity, the boost rectifier with automatic control is potentially the least expensive active line-harmonics reducing circuit. The filtered line current, however, shows considerable distortion when the peak input voltage is close to the output voltage. This paper presents an analysis of the circuit, discusses the compliance with EN61000-3-2, reviews two previous distortion-reduction methods, and proposes a new, more economical, and technically superior, method.
{"title":"Reducing distortion in boost rectifiers with automatic control","authors":"R. Redl","doi":"10.1109/APEC.1997.581436","DOIUrl":"https://doi.org/10.1109/APEC.1997.581436","url":null,"abstract":"Due to its simplicity, the boost rectifier with automatic control is potentially the least expensive active line-harmonics reducing circuit. The filtered line current, however, shows considerable distortion when the peak input voltage is close to the output voltage. This paper presents an analysis of the circuit, discusses the compliance with EN61000-3-2, reviews two previous distortion-reduction methods, and proposes a new, more economical, and technically superior, method.","PeriodicalId":423659,"journal":{"name":"Proceedings of APEC 97 - Applied Power Electronics Conference","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131083496","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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