Pub Date : 2013-06-03DOI: 10.1109/ECCE-ASIA.2013.6579084
P. Grbović
Parallel interleaved power converters are used in application that require high power capability, minimization of size, cost and losses of the passive components and improvement of the control performances. Interleaved dc-dc converter is an attractive solution widely used in various power conversion applications, such as voltage regulation modules (VRM), renewable applications, automotive and traction applications, power factor correctors (PFC) and power supplies. Apart some general analysis of interleaved converters presented in literature, there is not a single publication that gives detailed analysis and closed form equation of the dc bus capacitor current stress in case of N-cell interleaved dc-dc converter. In this paper, a detailed analysis of N-cell interleaved dc-dc converters with focus on the dc bus capacitor current stress is presented and a closed form equation of the dc bus capacitor RMS current is developed.
{"title":"Closed form analysis of N-cell interleaved two-level DC-DC converters: The DC bus capacitor current stress","authors":"P. Grbović","doi":"10.1109/ECCE-ASIA.2013.6579084","DOIUrl":"https://doi.org/10.1109/ECCE-ASIA.2013.6579084","url":null,"abstract":"Parallel interleaved power converters are used in application that require high power capability, minimization of size, cost and losses of the passive components and improvement of the control performances. Interleaved dc-dc converter is an attractive solution widely used in various power conversion applications, such as voltage regulation modules (VRM), renewable applications, automotive and traction applications, power factor correctors (PFC) and power supplies. Apart some general analysis of interleaved converters presented in literature, there is not a single publication that gives detailed analysis and closed form equation of the dc bus capacitor current stress in case of N-cell interleaved dc-dc converter. In this paper, a detailed analysis of N-cell interleaved dc-dc converters with focus on the dc bus capacitor current stress is presented and a closed form equation of the dc bus capacitor RMS current is developed.","PeriodicalId":301487,"journal":{"name":"2013 IEEE ECCE Asia Downunder","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115127220","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 : 2013-06-03DOI: 10.1109/ECCE-ASIA.2013.6579068
Jianing Wang, S. D. de Haan, J. Ferreira, P. Luerkens
Symmetry Cockcroft Walton multiplier is a typical cascade voltage multiplier. It is an attractive alternative to the high voltage (HV) transformer with high turn ratio and bridge rectifier in the HV generator in medical X-ray machine. It can reduce the stray capacitance of the HV transformer. However, previous work reports that the parasitic capacitances in the multiplier itself can be added to the stray capacitance of the transformer, which becomes a burden to the resonant capacitance of the generator. Thus, it is crucial to minimize the parasitic capacitances in the multiplier. In this paper, the complete model of the parasitic capacitances in the multiplier is exhibited. The model gives full description of parasitic capacitances in any spatial configuration of the multiplier module. Then, the equivalent capacitance of the model is obtained and analyzed to exhibit the role of parasitic capacitances in the system circuit. The dependence of the equivalent capacitance on different parameters, such as different groups of parasitic capacitances and the number of diodes per chain, is addressed. Besides, the impact of breakdown of the diodes on the equivalent capacitance is also exhibited. The complete capacitance model and the analysis of the equivalent parasitic capacitance are validated by the experimental measurements. In the end, guidelines are concluded for how to minimize the equivalent parasitic.
{"title":"Complete model of parasitic capacitances in a cascade voltage multiplier in the high voltage generator","authors":"Jianing Wang, S. D. de Haan, J. Ferreira, P. Luerkens","doi":"10.1109/ECCE-ASIA.2013.6579068","DOIUrl":"https://doi.org/10.1109/ECCE-ASIA.2013.6579068","url":null,"abstract":"Symmetry Cockcroft Walton multiplier is a typical cascade voltage multiplier. It is an attractive alternative to the high voltage (HV) transformer with high turn ratio and bridge rectifier in the HV generator in medical X-ray machine. It can reduce the stray capacitance of the HV transformer. However, previous work reports that the parasitic capacitances in the multiplier itself can be added to the stray capacitance of the transformer, which becomes a burden to the resonant capacitance of the generator. Thus, it is crucial to minimize the parasitic capacitances in the multiplier. In this paper, the complete model of the parasitic capacitances in the multiplier is exhibited. The model gives full description of parasitic capacitances in any spatial configuration of the multiplier module. Then, the equivalent capacitance of the model is obtained and analyzed to exhibit the role of parasitic capacitances in the system circuit. The dependence of the equivalent capacitance on different parameters, such as different groups of parasitic capacitances and the number of diodes per chain, is addressed. Besides, the impact of breakdown of the diodes on the equivalent capacitance is also exhibited. The complete capacitance model and the analysis of the equivalent parasitic capacitance are validated by the experimental measurements. In the end, guidelines are concluded for how to minimize the equivalent parasitic.","PeriodicalId":301487,"journal":{"name":"2013 IEEE ECCE Asia Downunder","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128336220","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 : 2013-06-03DOI: 10.1109/ECCE-ASIA.2013.6579260
Mao Meiqin, Niu Chengyu, Liuchen Chang
In order to design and test the control algorithms of the actual direct-drive wind generation system (DDWGS) with a permanent magnet synchronous generator (PMSG), it is necessary to reproduce the dynamic performances of wind turbine and PMSG in the lab. After the analysis of the aerodynamic, mechanical model of wind turbine and the electrical model of PMSG, a novel simulator based on three-phase voltage source inverter and DSP for a DDWGS with PMSG is proposed in this paper. Based on Park's transformation, double closed-loop PI control algorithm and space vector PWM, the proposed simulator which eliminates electro-mechanical parts can simulate the external mechanical and electrical characteristics of PMSG. The simulation and experiment results show that the proposed simulator can accurately simulate the external mechanical and electrical characteristics of the actual DDWGS with PMSG under static and dynamic conditions.
{"title":"A novel simulator based on voltage source inverter for direct-drive PMSG wind generation system","authors":"Mao Meiqin, Niu Chengyu, Liuchen Chang","doi":"10.1109/ECCE-ASIA.2013.6579260","DOIUrl":"https://doi.org/10.1109/ECCE-ASIA.2013.6579260","url":null,"abstract":"In order to design and test the control algorithms of the actual direct-drive wind generation system (DDWGS) with a permanent magnet synchronous generator (PMSG), it is necessary to reproduce the dynamic performances of wind turbine and PMSG in the lab. After the analysis of the aerodynamic, mechanical model of wind turbine and the electrical model of PMSG, a novel simulator based on three-phase voltage source inverter and DSP for a DDWGS with PMSG is proposed in this paper. Based on Park's transformation, double closed-loop PI control algorithm and space vector PWM, the proposed simulator which eliminates electro-mechanical parts can simulate the external mechanical and electrical characteristics of PMSG. The simulation and experiment results show that the proposed simulator can accurately simulate the external mechanical and electrical characteristics of the actual DDWGS with PMSG under static and dynamic conditions.","PeriodicalId":301487,"journal":{"name":"2013 IEEE ECCE Asia Downunder","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130778337","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 : 2013-06-03DOI: 10.1109/ECCE-ASIA.2013.6579132
Devendra Patil, V. Agarwal
This paper proposes a high frequency link multi-input DC-AC converter for renewable energy applications. It consists of a boost converter for interfacing uni-directional sources and bi-directional buck-boost converter for interfacing the storage system. An LLC resonant converter is used to further boost the DC voltage and convert DC into high frequency AC. Finally, a cycloconverter is used to convert from high frequency AC to line frequency. The features of the proposed system include reduced number of power conversion stages, low part count, high frequency operation. High frequency switching losses are eliminated using soft switching technique, thereby reducing the magnetics and heat sink requirements. This results in lower cost and higher efficiency. Simulation results are presented to validate the proposed converter configuration and its control performance.
{"title":"Multi-input DC-AC converter for renewable energy applications","authors":"Devendra Patil, V. Agarwal","doi":"10.1109/ECCE-ASIA.2013.6579132","DOIUrl":"https://doi.org/10.1109/ECCE-ASIA.2013.6579132","url":null,"abstract":"This paper proposes a high frequency link multi-input DC-AC converter for renewable energy applications. It consists of a boost converter for interfacing uni-directional sources and bi-directional buck-boost converter for interfacing the storage system. An LLC resonant converter is used to further boost the DC voltage and convert DC into high frequency AC. Finally, a cycloconverter is used to convert from high frequency AC to line frequency. The features of the proposed system include reduced number of power conversion stages, low part count, high frequency operation. High frequency switching losses are eliminated using soft switching technique, thereby reducing the magnetics and heat sink requirements. This results in lower cost and higher efficiency. Simulation results are presented to validate the proposed converter configuration and its control performance.","PeriodicalId":301487,"journal":{"name":"2013 IEEE ECCE Asia Downunder","volume":"171 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133354007","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 : 2013-06-03DOI: 10.1109/ECCE-ASIA.2013.6579067
Jae-Bum Lee, Jea-Kuk Kim, Jae-Hyun Kim, Moonsoo Kim, G. Moon
Till now, the various types of the half-bridge (HB) converters with output inductor have been developed, and they exhibit a good performance in medium power applications such as the server power supplies and personal computer (PC) power supplies requiring the hold-up time conditions and high output current. However, they have common problems such as high snubber loss and switch turn-off losses caused by the output inductor, which degrades light load efficiency. To relieve these limitations of the conventional HB converters, a new HB converter, which employs one additional switch and capacitor in the secondary side, is proposed for a high efficiency at light load conditions in this paper. Since the proposed converter operates like the HB LLC converter by turning on additional switch at light load conditions, the snubber loss and switch turn-off losses can be minimized. Therefore, the proposed converter can achieve a high efficiency at light load conditions. To confirm the operation, validity, and features of the proposed converter, a 330-400V input and 12V/400W output laboratory prototype is built and tested.
{"title":"A high efficiency PFM half-bridge converter utilizing a half-bridge LLC converter under light load conditions","authors":"Jae-Bum Lee, Jea-Kuk Kim, Jae-Hyun Kim, Moonsoo Kim, G. Moon","doi":"10.1109/ECCE-ASIA.2013.6579067","DOIUrl":"https://doi.org/10.1109/ECCE-ASIA.2013.6579067","url":null,"abstract":"Till now, the various types of the half-bridge (HB) converters with output inductor have been developed, and they exhibit a good performance in medium power applications such as the server power supplies and personal computer (PC) power supplies requiring the hold-up time conditions and high output current. However, they have common problems such as high snubber loss and switch turn-off losses caused by the output inductor, which degrades light load efficiency. To relieve these limitations of the conventional HB converters, a new HB converter, which employs one additional switch and capacitor in the secondary side, is proposed for a high efficiency at light load conditions in this paper. Since the proposed converter operates like the HB LLC converter by turning on additional switch at light load conditions, the snubber loss and switch turn-off losses can be minimized. Therefore, the proposed converter can achieve a high efficiency at light load conditions. To confirm the operation, validity, and features of the proposed converter, a 330-400V input and 12V/400W output laboratory prototype is built and tested.","PeriodicalId":301487,"journal":{"name":"2013 IEEE ECCE Asia Downunder","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132808599","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 : 2013-06-03DOI: 10.1109/ECCE-ASIA.2013.6579222
Zhiheng Zhang, Yi Wang, Heming Li, Xiaoqin Su
Doubly fed induction generator (DFIG)-based wind turbines are nowadays used widely in large wind farms. Due to the fact the control system of DFIG is not based on the power system frequency, the whole inertia of the power system is reducing rapidly with the penetration of wind generation increasing. This is extremely bad for the stability of the system frequency. Thence, ancillary inertia control strategies of DFIG need to be developed to compensate for this deficiency. At the beginning of this article, the vector control system of DFIG-based wind turbines is described briefly. The inertia control methods making use of that model could later be designed out. Then, a concept called controllable virtual inertia is put out and the derivation of its formula is given in details. After the two inertia control strategies of DFIG are described fully, the mechanism that how the virtual inertia of DFIG can be manipulated is revealed: the parameters (K1, K2and K3) contained in the inertia control schemes determine proportionally the virtual inertia level of DFIG. Finally, through the simulations in Matlab/Simulink, the two strategies of inertia control for DFIG-based wind turbines which have been utilized in this work are effective for the system frequency support and the concept named as controllable virtual inertia has theory worth for further research.
{"title":"Comparison of inertia control methods for DFIG-based wind turbines","authors":"Zhiheng Zhang, Yi Wang, Heming Li, Xiaoqin Su","doi":"10.1109/ECCE-ASIA.2013.6579222","DOIUrl":"https://doi.org/10.1109/ECCE-ASIA.2013.6579222","url":null,"abstract":"Doubly fed induction generator (DFIG)-based wind turbines are nowadays used widely in large wind farms. Due to the fact the control system of DFIG is not based on the power system frequency, the whole inertia of the power system is reducing rapidly with the penetration of wind generation increasing. This is extremely bad for the stability of the system frequency. Thence, ancillary inertia control strategies of DFIG need to be developed to compensate for this deficiency. At the beginning of this article, the vector control system of DFIG-based wind turbines is described briefly. The inertia control methods making use of that model could later be designed out. Then, a concept called controllable virtual inertia is put out and the derivation of its formula is given in details. After the two inertia control strategies of DFIG are described fully, the mechanism that how the virtual inertia of DFIG can be manipulated is revealed: the parameters (K1, K2and K3) contained in the inertia control schemes determine proportionally the virtual inertia level of DFIG. Finally, through the simulations in Matlab/Simulink, the two strategies of inertia control for DFIG-based wind turbines which have been utilized in this work are effective for the system frequency support and the concept named as controllable virtual inertia has theory worth for further research.","PeriodicalId":301487,"journal":{"name":"2013 IEEE ECCE Asia Downunder","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132503553","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 : 2013-06-03DOI: 10.1109/ECCE-ASIA.2013.6579225
R. A. Pentz, J. Wheeler, G. de Jager, R. Wilkinson
Piezoelectric ceramic transducers (PZTs) are widely used in industry for ultrasonic applications such as cleaning, cutting, homogenization, sterilization and welding. Switching inverters are increasingly used to drive these transducers in high power applications. These transducers are non-linear loads that are sensitive to the harmonic content of the driving voltage used. Depending on the inverter topology and modulation method used, the harmonic content of the unfiltered output voltage can vary significantly. It is most desirable to drive tonpilz or horn ultrasonic transducers with a sinusoidal driving signal at the thickness resonance frequency of the ceramic used. Non-sinusoidal driving signals, e.g. the unfiltered square-wave output voltage of a typical switching-inverter contain harmonics at the thickness resonance frequency as well as at and around multiples of the switching frequency. The transducers are sensitive to the harmonic content of the driving signals as unwanted mechanical modes can be excited, leading to the destruction of the transducer. This paper will show that a half-bridge and a 5-cell multicell inverter topology deliver outputs with low harmonic content and are therefore possible switching-converter options for driving an ultrasonic transducer load without activating its destructive modes. In the case of the multicell inverter, the possible voltage unbalance of the cell capacitors will also be discussed.
{"title":"Driving an ultrasonic transducer with a multicell inverter","authors":"R. A. Pentz, J. Wheeler, G. de Jager, R. Wilkinson","doi":"10.1109/ECCE-ASIA.2013.6579225","DOIUrl":"https://doi.org/10.1109/ECCE-ASIA.2013.6579225","url":null,"abstract":"Piezoelectric ceramic transducers (PZTs) are widely used in industry for ultrasonic applications such as cleaning, cutting, homogenization, sterilization and welding. Switching inverters are increasingly used to drive these transducers in high power applications. These transducers are non-linear loads that are sensitive to the harmonic content of the driving voltage used. Depending on the inverter topology and modulation method used, the harmonic content of the unfiltered output voltage can vary significantly. It is most desirable to drive tonpilz or horn ultrasonic transducers with a sinusoidal driving signal at the thickness resonance frequency of the ceramic used. Non-sinusoidal driving signals, e.g. the unfiltered square-wave output voltage of a typical switching-inverter contain harmonics at the thickness resonance frequency as well as at and around multiples of the switching frequency. The transducers are sensitive to the harmonic content of the driving signals as unwanted mechanical modes can be excited, leading to the destruction of the transducer. This paper will show that a half-bridge and a 5-cell multicell inverter topology deliver outputs with low harmonic content and are therefore possible switching-converter options for driving an ultrasonic transducer load without activating its destructive modes. In the case of the multicell inverter, the possible voltage unbalance of the cell capacitors will also be discussed.","PeriodicalId":301487,"journal":{"name":"2013 IEEE ECCE Asia Downunder","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114294731","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 : 2013-06-03DOI: 10.1109/ECCE-ASIA.2013.6579181
M. P. Shreelakshmi, V. Agarwal
This paper proposes a reliable, energy efficient and high power quality elevator system. The proposed elevator system consists of an ultra-capacitor (UC), a fuel cell (FC) and a power factor correction (PFC) circuit. A novel technique for relieving the power grid from supplying the starting inrush current is proposed. Fuel cell is used for the ride-through operation. Ultra-capacitor bank is used for storing the regenerated energy, which makes the elevator energy efficient, as well as for providing the transient power demand of the system. The proposed system has been simulated using MATLAB/simulink software and the simulation results are presented in the paper.
{"title":"An energy efficient and environment friendly elevator system using ultracapacitor and fuel cell with power factor correction","authors":"M. P. Shreelakshmi, V. Agarwal","doi":"10.1109/ECCE-ASIA.2013.6579181","DOIUrl":"https://doi.org/10.1109/ECCE-ASIA.2013.6579181","url":null,"abstract":"This paper proposes a reliable, energy efficient and high power quality elevator system. The proposed elevator system consists of an ultra-capacitor (UC), a fuel cell (FC) and a power factor correction (PFC) circuit. A novel technique for relieving the power grid from supplying the starting inrush current is proposed. Fuel cell is used for the ride-through operation. Ultra-capacitor bank is used for storing the regenerated energy, which makes the elevator energy efficient, as well as for providing the transient power demand of the system. The proposed system has been simulated using MATLAB/simulink software and the simulation results are presented in the paper.","PeriodicalId":301487,"journal":{"name":"2013 IEEE ECCE Asia Downunder","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131876556","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 : 2013-06-03DOI: 10.1109/ECCE-ASIA.2013.6579121
Byung-Geuk Cho, S. Sul
In this paper, a reactive power sharing method is proposed for the operation of multiple distributed generation units. When the line impedance is unbalanced, accurate reactive power sharing is challenging with conventional current sharing or droop control strategies. This paper describes the effect of the unequal line impedances on the reactive power sharing accuracy, especially for mainly inductive line impedance. The proposed method compensates the impedance effect by modifying the droop slope and is shown to be effective through two parallel 1MVA units. The accuracy of the reactive power sharing is improved by 26.7% and 42.5% for each DG unit in the grid-connected mode and 11.9% in the islanding mode.
{"title":"Power sharing strategy in parallel operation of inverters for distributed power system under line impedance inequality","authors":"Byung-Geuk Cho, S. Sul","doi":"10.1109/ECCE-ASIA.2013.6579121","DOIUrl":"https://doi.org/10.1109/ECCE-ASIA.2013.6579121","url":null,"abstract":"In this paper, a reactive power sharing method is proposed for the operation of multiple distributed generation units. When the line impedance is unbalanced, accurate reactive power sharing is challenging with conventional current sharing or droop control strategies. This paper describes the effect of the unequal line impedances on the reactive power sharing accuracy, especially for mainly inductive line impedance. The proposed method compensates the impedance effect by modifying the droop slope and is shown to be effective through two parallel 1MVA units. The accuracy of the reactive power sharing is improved by 26.7% and 42.5% for each DG unit in the grid-connected mode and 11.9% in the islanding mode.","PeriodicalId":301487,"journal":{"name":"2013 IEEE ECCE Asia Downunder","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132049090","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 : 2013-06-03DOI: 10.1109/ECCE-ASIA.2013.6579227
Y. Ting, S. D. de Haan, J. Ferreira
The Partial Resonant Single Active Bridge (PR-SAB) introduced in this paper is able to reduce conduction losses in the Single Active Bridge (SAB) with the addition of partial resonant phases. In the SAB, current flows through the switch snubber capacitors only during the short quasi-ZVS turnoff phases. However in the PR-SAB, current flows in the snubber capacitors instead of the switches and diodes during the partial resonant phases which occupy up to 50% of each switching period. As capacitors have negligible losses as compared to switches and diodes especially at higher voltages, conduction losses are reduced when significant portion of current is diverted to the capacitors. By reducing conduction losses, higher overall efficiency is achieved in the PR-SAB. The conduction losses reductions of the components in the PR-SAB are analysed and compared with those in the SAB. IGBT switching losses reductions during quasi-ZVS turn-off in the PR-SAB are also discussed. With the analysed conduction and switching losses, the improved efficiencies of the PR-SAB over the SAB are analytically determined. As compared to the SAB, the PR-SAB also exhibits up to 20% lower peak currents resulting in lower component stresses. These analysis are verified with experimental results obtained with a 3.4 kW hardware prototype.
{"title":"The partial-resonant single active bridge DC-DC converter for conduction losses reduction in the single active bridge","authors":"Y. Ting, S. D. de Haan, J. Ferreira","doi":"10.1109/ECCE-ASIA.2013.6579227","DOIUrl":"https://doi.org/10.1109/ECCE-ASIA.2013.6579227","url":null,"abstract":"The Partial Resonant Single Active Bridge (PR-SAB) introduced in this paper is able to reduce conduction losses in the Single Active Bridge (SAB) with the addition of partial resonant phases. In the SAB, current flows through the switch snubber capacitors only during the short quasi-ZVS turnoff phases. However in the PR-SAB, current flows in the snubber capacitors instead of the switches and diodes during the partial resonant phases which occupy up to 50% of each switching period. As capacitors have negligible losses as compared to switches and diodes especially at higher voltages, conduction losses are reduced when significant portion of current is diverted to the capacitors. By reducing conduction losses, higher overall efficiency is achieved in the PR-SAB. The conduction losses reductions of the components in the PR-SAB are analysed and compared with those in the SAB. IGBT switching losses reductions during quasi-ZVS turn-off in the PR-SAB are also discussed. With the analysed conduction and switching losses, the improved efficiencies of the PR-SAB over the SAB are analytically determined. As compared to the SAB, the PR-SAB also exhibits up to 20% lower peak currents resulting in lower component stresses. These analysis are verified with experimental results obtained with a 3.4 kW hardware prototype.","PeriodicalId":301487,"journal":{"name":"2013 IEEE ECCE Asia Downunder","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128573793","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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