Pub Date : 1999-03-14DOI: 10.1109/APEC.1999.749737
R. Miftakhutdinov, A. Nemchinov, V. Meleshin, S. Fraidlin
A modification is proposed for the asymmetrical zero-voltage-switched (ZVS) half-bridge DC-DC converter topology that substantially changes the static transfer function and the voltage stress distribution within the converter power mesh. This modification allows the converter circuit to be optimised for higher efficiency and power density. It is also postulated that the modification with its corresponding benefits can be utilised in other complementary driven topologies. Although the asymmetrical H-B converter is inherently capable of ZVS switching, only the proper choice of parameters can insure ZVS in all modes of operation. The DC circuit analysis and design procedure for the power stage components are presented. Experimental results, in good agreement with the analysis, are presented for a 300 W converter operating at 500 kHz, with 5 VDC/60 Amp output, and 84% efficiency at 75 W/in/sup 3/.
{"title":"Modified asymmetrical ZVS half-bridge DC-DC converter","authors":"R. Miftakhutdinov, A. Nemchinov, V. Meleshin, S. Fraidlin","doi":"10.1109/APEC.1999.749737","DOIUrl":"https://doi.org/10.1109/APEC.1999.749737","url":null,"abstract":"A modification is proposed for the asymmetrical zero-voltage-switched (ZVS) half-bridge DC-DC converter topology that substantially changes the static transfer function and the voltage stress distribution within the converter power mesh. This modification allows the converter circuit to be optimised for higher efficiency and power density. It is also postulated that the modification with its corresponding benefits can be utilised in other complementary driven topologies. Although the asymmetrical H-B converter is inherently capable of ZVS switching, only the proper choice of parameters can insure ZVS in all modes of operation. The DC circuit analysis and design procedure for the power stage components are presented. Experimental results, in good agreement with the analysis, are presented for a 300 W converter operating at 500 kHz, with 5 VDC/60 Amp output, and 84% efficiency at 75 W/in/sup 3/.","PeriodicalId":287192,"journal":{"name":"APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115753152","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 : 1999-03-14DOI: 10.1109/APEC.1999.750513
Yu-Kang Lo, Lian-Chen Kuo
A new control method for single-phase shunt active power line conditioners (APLCs) operated under zero average power consumption is proposed in this paper. The amplitude of the sinusoidal source current which is in-phase with the source voltage can be determined from the average value of the instantaneous load power. Then the command current for the shunt APLC is obtained by subtracting the source current from the load current. Neither bulky filter nor time-consuming computation is required. The shunt power compensator supplies all the harmonics of the load current and the source only supplies the fundamental component. Experimental results on a prototype verify the feasibility of the presented scheme.
{"title":"A new control method for single-phase active power line conditioners","authors":"Yu-Kang Lo, Lian-Chen Kuo","doi":"10.1109/APEC.1999.750513","DOIUrl":"https://doi.org/10.1109/APEC.1999.750513","url":null,"abstract":"A new control method for single-phase shunt active power line conditioners (APLCs) operated under zero average power consumption is proposed in this paper. The amplitude of the sinusoidal source current which is in-phase with the source voltage can be determined from the average value of the instantaneous load power. Then the command current for the shunt APLC is obtained by subtracting the source current from the load current. Neither bulky filter nor time-consuming computation is required. The shunt power compensator supplies all the harmonics of the load current and the source only supplies the fundamental component. Experimental results on a prototype verify the feasibility of the presented scheme.","PeriodicalId":287192,"journal":{"name":"APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114618841","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 : 1999-03-14DOI: 10.1109/APEC.1999.750512
J. Hwang, C. Hsu
This paper introduces a new 8 pin PFC/PWM controller using input current shaping topology. The input current shaping PFC topology previously proposed is revisited in this paper. With an innovative circuit, we were able to reduce the pin count and external components in a cost sensitive market place. The controller is analyzed and verified experimentally.
{"title":"A new 8 pin power factor correction and pulse width modulator controller for off-line power supplies","authors":"J. Hwang, C. Hsu","doi":"10.1109/APEC.1999.750512","DOIUrl":"https://doi.org/10.1109/APEC.1999.750512","url":null,"abstract":"This paper introduces a new 8 pin PFC/PWM controller using input current shaping topology. The input current shaping PFC topology previously proposed is revisited in this paper. With an innovative circuit, we were able to reduce the pin count and external components in a cost sensitive market place. The controller is analyzed and verified experimentally.","PeriodicalId":287192,"journal":{"name":"APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114910569","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 : 1999-03-14DOI: 10.1109/APEC.1999.750524
G. Suresh, B. Fahimi, K. Rahman, M. Ehsani, I. Panahi
This paper describes a sensorless, four-quadrant switched reluctance motor (SRM) drive with high position resolution and accuracy at all operating speeds. In order to achieve sensorless control, a modified amplitude modulation scheme is used. Using this method, very high position resolution and accuracy comparable to that of a 14-bit resolver has been achieved. Detailed simulation of the drive system has been carried out using Matlab-Simulink in order to understand the dynamics of the system. For validation purposes, comprehensive set of experiments were performed on a 500 W, 100 V, 3000 RPM, 6/4, three-phase drive system and results are presented. The desired operations of a typical 4-quadrant drive, viz., motoring and generating in the forward and reverse directions have been achieved experimentally and the results are included. A brief analysis on the resolution, accuracy, speed range and transient stability of the sensorless method, which are very essential for practical design of any drive system is also presented. Some of the practical constraints in implementing the modulation scheme like the effect of high frequency signal injection on the sensitivity, effect of mutual coupling on the performance of the sensorless scheme are also discussed.
{"title":"Four-quadrant sensorless SRM drive with high accuracy at all speeds","authors":"G. Suresh, B. Fahimi, K. Rahman, M. Ehsani, I. Panahi","doi":"10.1109/APEC.1999.750524","DOIUrl":"https://doi.org/10.1109/APEC.1999.750524","url":null,"abstract":"This paper describes a sensorless, four-quadrant switched reluctance motor (SRM) drive with high position resolution and accuracy at all operating speeds. In order to achieve sensorless control, a modified amplitude modulation scheme is used. Using this method, very high position resolution and accuracy comparable to that of a 14-bit resolver has been achieved. Detailed simulation of the drive system has been carried out using Matlab-Simulink in order to understand the dynamics of the system. For validation purposes, comprehensive set of experiments were performed on a 500 W, 100 V, 3000 RPM, 6/4, three-phase drive system and results are presented. The desired operations of a typical 4-quadrant drive, viz., motoring and generating in the forward and reverse directions have been achieved experimentally and the results are included. A brief analysis on the resolution, accuracy, speed range and transient stability of the sensorless method, which are very essential for practical design of any drive system is also presented. Some of the practical constraints in implementing the modulation scheme like the effect of high frequency signal injection on the sensitivity, effect of mutual coupling on the performance of the sensorless scheme are also discussed.","PeriodicalId":287192,"journal":{"name":"APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285)","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126917541","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 : 1999-03-14DOI: 10.1109/APEC.1999.749646
Dae-Woong Chung, S. Sul
In this paper, a new dynamic overmodulation strategy is proposed for vector-controlled induction motor drive, and a comparison study with conventional schemes is described in an analytical manner. By considering voltage boundary of inverter and current dynamics of induction motor simultaneously, the proposed overmodulation scheme allocates the output voltage of the inverter so that synchronous d-axis voltage is diminished in proportion as reference voltage exceeds hexagon boundary. As a result, d-axis current of vector-controlled induction motor is decreased in the overmodulation region, which secures the control voltage margin and improves the dynamic performance of torque control. The conspicuous improvement of the proposed scheme over conventional ones is observed in both simulated and experimental results.
{"title":"A new dynamic overmodulation strategy for high performance torque control of induction motor","authors":"Dae-Woong Chung, S. Sul","doi":"10.1109/APEC.1999.749646","DOIUrl":"https://doi.org/10.1109/APEC.1999.749646","url":null,"abstract":"In this paper, a new dynamic overmodulation strategy is proposed for vector-controlled induction motor drive, and a comparison study with conventional schemes is described in an analytical manner. By considering voltage boundary of inverter and current dynamics of induction motor simultaneously, the proposed overmodulation scheme allocates the output voltage of the inverter so that synchronous d-axis voltage is diminished in proportion as reference voltage exceeds hexagon boundary. As a result, d-axis current of vector-controlled induction motor is decreased in the overmodulation region, which secures the control voltage margin and improves the dynamic performance of torque control. The conspicuous improvement of the proposed scheme over conventional ones is observed in both simulated and experimental results.","PeriodicalId":287192,"journal":{"name":"APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125790234","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 : 1999-03-14DOI: 10.1109/APEC.1999.749659
F. Wakeman, K. Billett, R. Irons, M. Evans
The mechanical design of a completely bondless, pressure contact IGBT is discussed and its implications on the electrical characteristics are compared to those of a similarly rated module device. It is determined that the differences in the electrical characteristics of a pressure contact IGBT may offer certain advantages in some applications.
{"title":"Electromechanical characteristics of a bondless pressure contact IGBT","authors":"F. Wakeman, K. Billett, R. Irons, M. Evans","doi":"10.1109/APEC.1999.749659","DOIUrl":"https://doi.org/10.1109/APEC.1999.749659","url":null,"abstract":"The mechanical design of a completely bondless, pressure contact IGBT is discussed and its implications on the electrical characteristics are compared to those of a similarly rated module device. It is determined that the differences in the electrical characteristics of a pressure contact IGBT may offer certain advantages in some applications.","PeriodicalId":287192,"journal":{"name":"APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125845780","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 : 1999-03-14DOI: 10.1109/APEC.1999.749731
K. Matsuse, K. Sugita, T. Ishida, Lipei Huang, K. Sasagawa
This paper describes a control method for a diode-clamped three-phase five-level PWM power converter considering the DC-link capacitor balancing problem. The proposed control circuit uses multiband hysteresis comparators (MHCs) to simplify the control of the main circuit. The DC-link capacitor balancing problem is solved by changing the shape of the MHC. The proposed method can: (1) overcome voltage imbalance in the DC capacitors; (2) achieve unity power factor; (3) generate nearly sinusoidal input currents; and (4) regenerate electric power back to the power system. Simulation and experimental results demonstrate the validity of the proposed method.
{"title":"DC voltage control strategy for a five-level converter","authors":"K. Matsuse, K. Sugita, T. Ishida, Lipei Huang, K. Sasagawa","doi":"10.1109/APEC.1999.749731","DOIUrl":"https://doi.org/10.1109/APEC.1999.749731","url":null,"abstract":"This paper describes a control method for a diode-clamped three-phase five-level PWM power converter considering the DC-link capacitor balancing problem. The proposed control circuit uses multiband hysteresis comparators (MHCs) to simplify the control of the main circuit. The DC-link capacitor balancing problem is solved by changing the shape of the MHC. The proposed method can: (1) overcome voltage imbalance in the DC capacitors; (2) achieve unity power factor; (3) generate nearly sinusoidal input currents; and (4) regenerate electric power back to the power system. Simulation and experimental results demonstrate the validity of the proposed method.","PeriodicalId":287192,"journal":{"name":"APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127284838","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 : 1999-03-14DOI: 10.1109/APEC.1999.749484
M. Meinhardt, A. Alderman, J. Flannery, P. Cheasty, S. Eckert, C. Mathuna
The paper shows the motivation, methodology and early results of a review of the status of power electronic packaging (STATPEP) used in commercial DC/DCand AC/DC-switch mode power supplies. Based on the current status and the knowledge about the development of PEP over the last 5 to 10 years experience curves are developed which show the expected trends in PEP of power supplies for the future. The STATPEP project is being co-sponsored by the PSMA and participating companies.
{"title":"STATPEP-current status of power electronic packaging for power supplies-methodology","authors":"M. Meinhardt, A. Alderman, J. Flannery, P. Cheasty, S. Eckert, C. Mathuna","doi":"10.1109/APEC.1999.749484","DOIUrl":"https://doi.org/10.1109/APEC.1999.749484","url":null,"abstract":"The paper shows the motivation, methodology and early results of a review of the status of power electronic packaging (STATPEP) used in commercial DC/DCand AC/DC-switch mode power supplies. Based on the current status and the knowledge about the development of PEP over the last 5 to 10 years experience curves are developed which show the expected trends in PEP of power supplies for the future. The STATPEP project is being co-sponsored by the PSMA and participating companies.","PeriodicalId":287192,"journal":{"name":"APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121614614","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 : 1999-03-14DOI: 10.1109/APEC.1999.750507
J. He, M. E. Jacobs
This paper presents a new nondissipative dynamic current-sharing passive snubber circuit for parallel-connected IGBTs used in high-frequency, high-power boost converters. Without a current-sharing snubber, a small disparity in on-state resistance and/or in turn-on delay can result in large device current and thermal imbalances of two similar IGBTs, even with tight thermal coupling. The proposed circuit not only provides dynamic current-sharing means for the minority carrier switching devices, but also serves as an energy recovery turn-on and turn-off snubber which minimizes the boost diode reverse-recovery current as well the boost switch turn-on and turn-off losses. It is especially suited for high power PFC applications where multiple-switching devices in parallel are usually required. The proposed current sharing snubber is verified in a 12.8 kW, 3-phase, boost converter.
{"title":"Non-dissipative dynamic current-sharing snubber for parallel connected IGBTs in high power boost converters","authors":"J. He, M. E. Jacobs","doi":"10.1109/APEC.1999.750507","DOIUrl":"https://doi.org/10.1109/APEC.1999.750507","url":null,"abstract":"This paper presents a new nondissipative dynamic current-sharing passive snubber circuit for parallel-connected IGBTs used in high-frequency, high-power boost converters. Without a current-sharing snubber, a small disparity in on-state resistance and/or in turn-on delay can result in large device current and thermal imbalances of two similar IGBTs, even with tight thermal coupling. The proposed circuit not only provides dynamic current-sharing means for the minority carrier switching devices, but also serves as an energy recovery turn-on and turn-off snubber which minimizes the boost diode reverse-recovery current as well the boost switch turn-on and turn-off losses. It is especially suited for high power PFC applications where multiple-switching devices in parallel are usually required. The proposed current sharing snubber is verified in a 12.8 kW, 3-phase, boost converter.","PeriodicalId":287192,"journal":{"name":"APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285)","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121959176","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 : 1999-03-14DOI: 10.1109/APEC.1999.750506
Ó. García, P. Alou, J. Oliver, J. Cobos, J. Uceda, O. Ollero
In this paper, the combination of the use a single central loop with a family of AC/DC power converters is proposed. The major advantage of these power converters over the two-stage approach is that a big part of the output power is processed only once. With a single control loop, the cost of the circuit is reduced and the energy management can be improved. Design guidelines, analysis of the line current and the evolution of the main magnitudes are analyzed. Experimental results are also included in the paper. A methodology to improve the power processing of the power converter to be within the limits of the IEC 1000-3-2 Standard is proposed.
{"title":"AC/DC converters with tight output voltage regulation and with a single control loop","authors":"Ó. García, P. Alou, J. Oliver, J. Cobos, J. Uceda, O. Ollero","doi":"10.1109/APEC.1999.750506","DOIUrl":"https://doi.org/10.1109/APEC.1999.750506","url":null,"abstract":"In this paper, the combination of the use a single central loop with a family of AC/DC power converters is proposed. The major advantage of these power converters over the two-stage approach is that a big part of the output power is processed only once. With a single control loop, the cost of the circuit is reduced and the energy management can be improved. Design guidelines, analysis of the line current and the evolution of the main magnitudes are analyzed. Experimental results are also included in the paper. A methodology to improve the power processing of the power converter to be within the limits of the IEC 1000-3-2 Standard is proposed.","PeriodicalId":287192,"journal":{"name":"APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131379246","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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