Pub Date : 1997-02-23DOI: 10.1109/APEC.1997.581460
H.P. Yee
The MOSFFTs dV/sub drain//dt during turn off is sensed by the EMI suppression driver circuit, which selectively adjust the Vgs transition time at a voltage near the MOSFFT's threshold voltage. This technique controls the dV/sub drain//dt and reduces the EMI noise produced by a hard switching power MOSFET while keep its power loss at a minimum.
{"title":"An EMI suppression MOSFET driver","authors":"H.P. Yee","doi":"10.1109/APEC.1997.581460","DOIUrl":"https://doi.org/10.1109/APEC.1997.581460","url":null,"abstract":"The MOSFFTs dV/sub drain//dt during turn off is sensed by the EMI suppression driver circuit, which selectively adjust the Vgs transition time at a voltage near the MOSFFT's threshold voltage. This technique controls the dV/sub drain//dt and reduces the EMI noise produced by a hard switching power MOSFET while keep its power loss at a minimum.","PeriodicalId":423659,"journal":{"name":"Proceedings of APEC 97 - Applied Power Electronics Conference","volume":"71 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":"115478045","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.1997.575738
R. Fuentes, H. Hey
An improved zero current switching pulse width modulation (ZCS-PWM) commutation cell is proposed, which is suitable for high power applications using IGBTs as the power switches. It provides ZCS operation for active switches with low current stress, without overvoltage and PWM operating at constant frequency. The main advantage of this cell is a substantial reduction of the resonant current peak through the main switch during the commutation process. Therefore, the RMS current through it is very close to that observed in hard-switching PWM power converters. Also, small ratings auxiliary components can be used. To demonstrate the feasibility of the proposed ZCS-PWM commutation cell, it was applied to a boost power converter. Operating principles, theoretical analysis, design guidelines and a design example are described and verified by experimental results obtained from a prototype operating at 40 kHz, with an input voltage rated at 155 V and 1 kW output power. The measured efficiency at full load was 97.5%.
{"title":"An improved ZCS-PWM commutation cell for IGBT's applications","authors":"R. Fuentes, H. Hey","doi":"10.1109/APEC.1997.575738","DOIUrl":"https://doi.org/10.1109/APEC.1997.575738","url":null,"abstract":"An improved zero current switching pulse width modulation (ZCS-PWM) commutation cell is proposed, which is suitable for high power applications using IGBTs as the power switches. It provides ZCS operation for active switches with low current stress, without overvoltage and PWM operating at constant frequency. The main advantage of this cell is a substantial reduction of the resonant current peak through the main switch during the commutation process. Therefore, the RMS current through it is very close to that observed in hard-switching PWM power converters. Also, small ratings auxiliary components can be used. To demonstrate the feasibility of the proposed ZCS-PWM commutation cell, it was applied to a boost power converter. Operating principles, theoretical analysis, design guidelines and a design example are described and verified by experimental results obtained from a prototype operating at 40 kHz, with an input voltage rated at 155 V and 1 kW output power. The measured efficiency at full load was 97.5%.","PeriodicalId":423659,"journal":{"name":"Proceedings of APEC 97 - Applied Power Electronics Conference","volume":"131 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":"114661592","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.1997.575743
N. Kutkut, K. Klontz
Inductive charging technology offers a safe and reliable method for electric vehicle battery charging. With inductive charging, the energy is transferred to the electric vehicle via magnetic induction rather than metal-to-metal contact. The high frequency electric vehicle inductive charger is basically a transformer with movable/separable parts for which a recommended practice has been published by the Society of Automotive Engineers (SAE J-1773). The practice specifies the inductive coupler (transformer) equivalent circuit and values. This paper investigates the design considerations for power converters suitable for supplying the SAE J-1773 inductive coupler. The investigated topologies utilize the coupler's equivalent circuit components effectively.
{"title":"Design considerations for power converters supplying the SAE J-1773 electric vehicle inductive coupler","authors":"N. Kutkut, K. Klontz","doi":"10.1109/APEC.1997.575743","DOIUrl":"https://doi.org/10.1109/APEC.1997.575743","url":null,"abstract":"Inductive charging technology offers a safe and reliable method for electric vehicle battery charging. With inductive charging, the energy is transferred to the electric vehicle via magnetic induction rather than metal-to-metal contact. The high frequency electric vehicle inductive charger is basically a transformer with movable/separable parts for which a recommended practice has been published by the Society of Automotive Engineers (SAE J-1773). The practice specifies the inductive coupler (transformer) equivalent circuit and values. This paper investigates the design considerations for power converters suitable for supplying the SAE J-1773 inductive coupler. The investigated topologies utilize the coupler's equivalent circuit components effectively.","PeriodicalId":423659,"journal":{"name":"Proceedings of APEC 97 - Applied Power Electronics Conference","volume":"29 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":"116682005","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.1997.581461
P. Kornetzky, Huai Hei, I. Batarseh
In this paper, a new one-stage power factor correction (PFC) converter unit with output electrical isolation is presented. The configuration of this converter is achieved by combining a flyback circuit and a forward circuit in one power stage. By re-arranging the active switch, it was possible to develop a converter topology that allows its PFC circuit and power conversion circuit to share the same power switch. Due to its simplified power stage and control circuit, this converter unit will potentially have a better efficiency, lower cost and higher reliability. A near unity power factor can be obtained by this single switch converter unit on the account of employing a flyback circuit as its input. Steady state analysis and detailed design procedure is presented in this paper. To verify the operation of the proposed converter, a design example is given with its PSPICE simulation and experimental results.
{"title":"A novel one-stage power factor correction converter","authors":"P. Kornetzky, Huai Hei, I. Batarseh","doi":"10.1109/APEC.1997.581461","DOIUrl":"https://doi.org/10.1109/APEC.1997.581461","url":null,"abstract":"In this paper, a new one-stage power factor correction (PFC) converter unit with output electrical isolation is presented. The configuration of this converter is achieved by combining a flyback circuit and a forward circuit in one power stage. By re-arranging the active switch, it was possible to develop a converter topology that allows its PFC circuit and power conversion circuit to share the same power switch. Due to its simplified power stage and control circuit, this converter unit will potentially have a better efficiency, lower cost and higher reliability. A near unity power factor can be obtained by this single switch converter unit on the account of employing a flyback circuit as its input. Steady state analysis and detailed design procedure is presented in this paper. To verify the operation of the proposed converter, a design example is given with its PSPICE simulation and experimental results.","PeriodicalId":423659,"journal":{"name":"Proceedings of APEC 97 - Applied Power Electronics Conference","volume":"76 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":"127250463","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.1997.581510
F. Maddaleno, Stefano Carabelli, M. Muzzarelli
To improve the overall efficiency of a transconductance amplifier loaded by the high inductance and low resistance typical of the magnetic bearing coils, a modified class G amplifier has been developed. A third transistor has been connected from ground to output, in order to obtain high efficiency coil discharge. A simple theoretical characterization has been used to provide some diagrams to optimize the power efficiency as a function of a nonconstant load such as that due to a rotor unbalance. Experimentalal results are reported showing a good agreement with the developed theory.
{"title":"A modified class G amplifier for active magnetic bearings","authors":"F. Maddaleno, Stefano Carabelli, M. Muzzarelli","doi":"10.1109/APEC.1997.581510","DOIUrl":"https://doi.org/10.1109/APEC.1997.581510","url":null,"abstract":"To improve the overall efficiency of a transconductance amplifier loaded by the high inductance and low resistance typical of the magnetic bearing coils, a modified class G amplifier has been developed. A third transistor has been connected from ground to output, in order to obtain high efficiency coil discharge. A simple theoretical characterization has been used to provide some diagrams to optimize the power efficiency as a function of a nonconstant load such as that due to a rotor unbalance. Experimentalal results are reported showing a good agreement with the developed theory.","PeriodicalId":423659,"journal":{"name":"Proceedings of APEC 97 - Applied Power Electronics Conference","volume":"8 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":"125068964","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.1997.581478
A. Brockmeyer, J. Paulus-Neues
Ferrite cores of magnetic components used in power electronics are often biased with a DC or low frequency premagnetization. Work has shown that a bias field may have significant influence on the remagnetization losses and therefore has to be considered in the component design. Using a precise measurement setup this paper investigates the frequency dependence of the power loss increase due to premagnetization. The measurements are performed on typical ferrites of two major manufacturers. The experimental results show that there are two major contributions to the total remagnetization losses of soft-ferrites whereas only one contribution is influenced by premagnetization. Finally the paper discusses some aspects of a mathematical description for the bias problem and leads to an improved understanding that might be useful for the designer of magnetic components.
{"title":"Frequency dependence of the ferrite-loss increase caused by premagnetization","authors":"A. Brockmeyer, J. Paulus-Neues","doi":"10.1109/APEC.1997.581478","DOIUrl":"https://doi.org/10.1109/APEC.1997.581478","url":null,"abstract":"Ferrite cores of magnetic components used in power electronics are often biased with a DC or low frequency premagnetization. Work has shown that a bias field may have significant influence on the remagnetization losses and therefore has to be considered in the component design. Using a precise measurement setup this paper investigates the frequency dependence of the power loss increase due to premagnetization. The measurements are performed on typical ferrites of two major manufacturers. The experimental results show that there are two major contributions to the total remagnetization losses of soft-ferrites whereas only one contribution is influenced by premagnetization. Finally the paper discusses some aspects of a mathematical description for the bias problem and leads to an improved understanding that might be useful for the designer of magnetic components.","PeriodicalId":423659,"journal":{"name":"Proceedings of APEC 97 - Applied Power Electronics Conference","volume":"42 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":"126907599","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.1997.581467
J. Kolar, H. Ertl, F. Zach, V. Blasko, V. Kaura, R. Lukaszewski
In this paper a simple circuit for feeding back the braking energy from the DC voltage link of a three-phase PWM AC drive system into the mains is proposed. The operating behavior of the system which consists of a series connection of a line-commutated three-phase bridge and a turn-off power semiconductor device and in principle does not require passive components is discussed. The stationary operating behavior is analyzed by analytical calculations and by digital simulation and represented in graphical form. Furthermore, the effects on the mains caused by the system for braking operation are analyzed and compared to the conditions for motoring operation and/or to the conditions for feeding of the DC link by an uncontrolled rectifier bridge. Finally, measures for guaranteeing high system operational safety are discussed and the advantages and disadvantages of the circuit are compiled in the form of an overview.
{"title":"A novel concept for regenerative braking of PWM-VSI drives employing a loss-free braking resistor","authors":"J. Kolar, H. Ertl, F. Zach, V. Blasko, V. Kaura, R. Lukaszewski","doi":"10.1109/APEC.1997.581467","DOIUrl":"https://doi.org/10.1109/APEC.1997.581467","url":null,"abstract":"In this paper a simple circuit for feeding back the braking energy from the DC voltage link of a three-phase PWM AC drive system into the mains is proposed. The operating behavior of the system which consists of a series connection of a line-commutated three-phase bridge and a turn-off power semiconductor device and in principle does not require passive components is discussed. The stationary operating behavior is analyzed by analytical calculations and by digital simulation and represented in graphical form. Furthermore, the effects on the mains caused by the system for braking operation are analyzed and compared to the conditions for motoring operation and/or to the conditions for feeding of the DC link by an uncontrolled rectifier bridge. Finally, measures for guaranteeing high system operational safety are discussed and the advantages and disadvantages of the circuit are compiled in the form of an overview.","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":"129766554","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.1997.581466
J. Sebastián, P. Villegas, M. Hernando, S. Ollero
The two-input buck (TIBuck) post-regulator has been proposed to improve the dynamic characteristics of conventional power factor correctors (PFCs). This post-regulator exhibits very high efficiency due to the fact that only a part of the total power undergoes a power conversion process and, therefore, the overall efficiency of the complete converter is very close to that of the first stage. In this paper, the implementation of a PFC based on a conventional flyback and a TIBuck is analyzed.
{"title":"High quality flyback power factor corrector based on a two input buck post-regulator","authors":"J. Sebastián, P. Villegas, M. Hernando, S. Ollero","doi":"10.1109/APEC.1997.581466","DOIUrl":"https://doi.org/10.1109/APEC.1997.581466","url":null,"abstract":"The two-input buck (TIBuck) post-regulator has been proposed to improve the dynamic characteristics of conventional power factor correctors (PFCs). This post-regulator exhibits very high efficiency due to the fact that only a part of the total power undergoes a power conversion process and, therefore, the overall efficiency of the complete converter is very close to that of the first stage. In this paper, the implementation of a PFC based on a conventional flyback and a TIBuck is analyzed.","PeriodicalId":423659,"journal":{"name":"Proceedings of APEC 97 - Applied Power Electronics Conference","volume":"85 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":"129159355","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.1997.575753
W. Chen, G. Hua, D. Sable, F. Lee
This paper presents an innovative design for a high efficiency, low profile, low voltage DC-DC power converter module intended for card mounted applications in a distributed aircraft power system. An innovative integrated magnetic structure for the half-bridge power converter lumps all the magnetic components into one structure and reduces the number of magnetic terminations. By incorporating advanced hybrid power packaging with the proposed integrated magnetic technique, a preliminary hybrid module of 1.6"/spl times/2.0" footprint and 0.21" height was developed. An overall efficiency (including the control circuit and power stage) of 90% was achieved for a 3.3 V, 100 W output operating at a 500 kHz switching frequency. The new integrated magnetic structure can be extended to other topologies.
{"title":"Design of high efficiency, low profile, low voltage converter with integrated magnetics","authors":"W. Chen, G. Hua, D. Sable, F. Lee","doi":"10.1109/APEC.1997.575753","DOIUrl":"https://doi.org/10.1109/APEC.1997.575753","url":null,"abstract":"This paper presents an innovative design for a high efficiency, low profile, low voltage DC-DC power converter module intended for card mounted applications in a distributed aircraft power system. An innovative integrated magnetic structure for the half-bridge power converter lumps all the magnetic components into one structure and reduces the number of magnetic terminations. By incorporating advanced hybrid power packaging with the proposed integrated magnetic technique, a preliminary hybrid module of 1.6\"/spl times/2.0\" footprint and 0.21\" height was developed. An overall efficiency (including the control circuit and power stage) of 90% was achieved for a 3.3 V, 100 W output operating at a 500 kHz switching frequency. The new integrated magnetic structure can be extended to other topologies.","PeriodicalId":423659,"journal":{"name":"Proceedings of APEC 97 - Applied Power Electronics Conference","volume":"42 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":"116299240","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.1997.575724
N. Ertugrul, P. Acarnley
The paper describes a modern solution to real-time rotor position estimation of permanent magnet (PM) motor drives. The estimation scheme, based on flux linkage and line current estimation, is implemented in real-time by using the abc reference frame, and it is tested dynamically, The position estimation model of the test motor, development of hardware and basic operation of the DSP are discussed, The overall position estimation strategy is accomplished with a fast digital signal processor (TMS320C30). The method is a shaft position sensorless method that is applicable to a wide range of excitation types in brushless PM motors without any restriction on the motor model and the current excitation. Both rectangular and sinewave excited brushless PM motor drives are examined and the results are given to demonstrate the effectiveness of the method with dynamic loads.
{"title":"Indirect rotor position sensing in real-time for brushless permanent magnet motor drives","authors":"N. Ertugrul, P. Acarnley","doi":"10.1109/APEC.1997.575724","DOIUrl":"https://doi.org/10.1109/APEC.1997.575724","url":null,"abstract":"The paper describes a modern solution to real-time rotor position estimation of permanent magnet (PM) motor drives. The estimation scheme, based on flux linkage and line current estimation, is implemented in real-time by using the abc reference frame, and it is tested dynamically, The position estimation model of the test motor, development of hardware and basic operation of the DSP are discussed, The overall position estimation strategy is accomplished with a fast digital signal processor (TMS320C30). The method is a shaft position sensorless method that is applicable to a wide range of excitation types in brushless PM motors without any restriction on the motor model and the current excitation. Both rectangular and sinewave excited brushless PM motor drives are examined and the results are given to demonstrate the effectiveness of the method with dynamic loads.","PeriodicalId":423659,"journal":{"name":"Proceedings of APEC 97 - Applied Power Electronics Conference","volume":"126 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":"121459913","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：