Pub Date : 2015-11-12DOI: 10.1109/SEGE.2015.7324616
Y. Mahmoud, E. El-Saadany
Various photovoltaic PV models of different complexity exist in the literature. The modeling accuracy for most of them is directly related to their complexity and computational effort. Recently, two newly developed PV models featuring low computational effort and high accuracy appeared in the literature. The first model is developed based on Gompertz model which is originally used to model human mortality, and the second relies on a polynomial function which represents the voltage drop in the model series resistance. Because both models have similar features, their pros and cons are not clear and thus it is challenging for users to decide which model is more suitable for a particular PV application. This paper constructs a comparison between the two models showing their pros and cons. The results of the paper would be beneficial for PV system designers and researchers to select the appropriate model for a specific PV application.
{"title":"Accuracy comparison between Gompertz and polynomial based PV models","authors":"Y. Mahmoud, E. El-Saadany","doi":"10.1109/SEGE.2015.7324616","DOIUrl":"https://doi.org/10.1109/SEGE.2015.7324616","url":null,"abstract":"Various photovoltaic PV models of different complexity exist in the literature. The modeling accuracy for most of them is directly related to their complexity and computational effort. Recently, two newly developed PV models featuring low computational effort and high accuracy appeared in the literature. The first model is developed based on Gompertz model which is originally used to model human mortality, and the second relies on a polynomial function which represents the voltage drop in the model series resistance. Because both models have similar features, their pros and cons are not clear and thus it is challenging for users to decide which model is more suitable for a particular PV application. This paper constructs a comparison between the two models showing their pros and cons. The results of the paper would be beneficial for PV system designers and researchers to select the appropriate model for a specific PV application.","PeriodicalId":6654,"journal":{"name":"2015 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"120 1","pages":"3278-3281"},"PeriodicalIF":0.0,"publicationDate":"2015-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77150843","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 : 2015-10-29DOI: 10.1109/ECCE.2015.7310576
H. Hijikata, Y. Sakai, K. Akatsu, Y. Miyama, H. Arita, A. Daikoku
This research proposes a novel low-voltage inverter-fed motor drive with variable characteristics achieved through the individual winding current control for the automobile traction motor. The independent armature winding with low-voltage inverters can improve the total efficiency by reducing the converter losses. Furthermore, the motor can expand the operating range since the inverters are able to change their connections to different coils groups of the armature winding. In this paper, the down size model was designed to verify the principle. It was confirmed that the principle model can extend the operating range and can expand the high efficiency area by FEA and experimental results.
{"title":"Wide range operation by low-voltage inverter-fed MATRIX motor with single-layer distributed winding for automobile traction motor","authors":"H. Hijikata, Y. Sakai, K. Akatsu, Y. Miyama, H. Arita, A. Daikoku","doi":"10.1109/ECCE.2015.7310576","DOIUrl":"https://doi.org/10.1109/ECCE.2015.7310576","url":null,"abstract":"This research proposes a novel low-voltage inverter-fed motor drive with variable characteristics achieved through the individual winding current control for the automobile traction motor. The independent armature winding with low-voltage inverters can improve the total efficiency by reducing the converter losses. Furthermore, the motor can expand the operating range since the inverters are able to change their connections to different coils groups of the armature winding. In this paper, the down size model was designed to verify the principle. It was confirmed that the principle model can extend the operating range and can expand the high efficiency area by FEA and experimental results.","PeriodicalId":6654,"journal":{"name":"2015 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"15 1","pages":"6545-6551"},"PeriodicalIF":0.0,"publicationDate":"2015-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75144359","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 : 2015-10-29DOI: 10.1109/ECCE.2015.7310150
S. Kaviri, Majid Pahlevani, B. Mohammadpour, P. Jain, A. Bakhshai
This paper presents a closed-loop control technique in D-Q rotating frame for bi-directional single-phase AC/DC converters. The proposed control system allows the active and reactive power control in both directions from grid to vehicle and vehicle to grid, while controlling the DC-bus voltage. Due to the lack of freedom degrees required for orthogonal systems, using the D-Q frame is a challenge in single-phase power conditioning systems. In this paper, an all-pass filter has been used to generate the orthogonal signals in the closed-loop control system. This method generates the orthogonal signals without degrading the dynamics of the closed-loop control system and with less noise in comparison to the other common methods such as differentiators. A DC-bus voltage estimator based on adaptive filter has also been used in this paper to remove the double frequency ripple and in turn increase the reliability and speed of the proposed controller. The proposed control scheme is used to implement the smart charging and power management strategies of the residential loads using electric vehicles as a storage system. Simulation and experimental results demonstrate the transient and steady-state performance of the proposed controller in different modes of operation. Also the performance of the proposed DC-bus voltage estimator in removing the double frequency ripple as well as the application of the proposed control scheme in implementation of power management strategies in a typical household, has been shown by using simulation results.
{"title":"A D-Q rotating frame DC-bus voltage controller for bi-directional single-phase AC/DC converters","authors":"S. Kaviri, Majid Pahlevani, B. Mohammadpour, P. Jain, A. Bakhshai","doi":"10.1109/ECCE.2015.7310150","DOIUrl":"https://doi.org/10.1109/ECCE.2015.7310150","url":null,"abstract":"This paper presents a closed-loop control technique in D-Q rotating frame for bi-directional single-phase AC/DC converters. The proposed control system allows the active and reactive power control in both directions from grid to vehicle and vehicle to grid, while controlling the DC-bus voltage. Due to the lack of freedom degrees required for orthogonal systems, using the D-Q frame is a challenge in single-phase power conditioning systems. In this paper, an all-pass filter has been used to generate the orthogonal signals in the closed-loop control system. This method generates the orthogonal signals without degrading the dynamics of the closed-loop control system and with less noise in comparison to the other common methods such as differentiators. A DC-bus voltage estimator based on adaptive filter has also been used in this paper to remove the double frequency ripple and in turn increase the reliability and speed of the proposed controller. The proposed control scheme is used to implement the smart charging and power management strategies of the residential loads using electric vehicles as a storage system. Simulation and experimental results demonstrate the transient and steady-state performance of the proposed controller in different modes of operation. Also the performance of the proposed DC-bus voltage estimator in removing the double frequency ripple as well as the application of the proposed control scheme in implementation of power management strategies in a typical household, has been shown by using simulation results.","PeriodicalId":6654,"journal":{"name":"2015 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"37 1","pages":"3468-3473"},"PeriodicalIF":0.0,"publicationDate":"2015-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75637773","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 : 2015-10-29DOI: 10.1109/ECCE.2015.7309720
Jinyeong Moon, S. Leeb
This paper presents a method for enhancing performance of a magnetic energy harvester. The harvester operates with a magnetically saturating core with high magnetic permeability. If the core saturates, the effective magnetizing inductance becomes small, and little power can be harvested from the core. Energy is harvested very efficiently during an operating cycle when the core is not saturated, a time period we call the “transfer window.” It can be shown that the location and the length of a transfer window are independent of each other. Based on this property, the transfer window alignment (TWA) method is introduced for maximizing power harvest. The TWA method manipulates the location of the time window, and harvests a greater amount of power compared to passive rectification. The principle of the TWA method reveals that deeper core saturation with higher voltage stress leads to a higher level of energy extraction. The analysis of the TWA method is presented, and verified with simulation and experiments. A detailed control sequence for actual implementation is presented. The TWA method poses little burden to hardware complexity.
{"title":"Enhancement on energy extraction from magnetic energy harvesters","authors":"Jinyeong Moon, S. Leeb","doi":"10.1109/ECCE.2015.7309720","DOIUrl":"https://doi.org/10.1109/ECCE.2015.7309720","url":null,"abstract":"This paper presents a method for enhancing performance of a magnetic energy harvester. The harvester operates with a magnetically saturating core with high magnetic permeability. If the core saturates, the effective magnetizing inductance becomes small, and little power can be harvested from the core. Energy is harvested very efficiently during an operating cycle when the core is not saturated, a time period we call the “transfer window.” It can be shown that the location and the length of a transfer window are independent of each other. Based on this property, the transfer window alignment (TWA) method is introduced for maximizing power harvest. The TWA method manipulates the location of the time window, and harvests a greater amount of power compared to passive rectification. The principle of the TWA method reveals that deeper core saturation with higher voltage stress leads to a higher level of energy extraction. The analysis of the TWA method is presented, and verified with simulation and experiments. A detailed control sequence for actual implementation is presented. The TWA method poses little burden to hardware complexity.","PeriodicalId":6654,"journal":{"name":"2015 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"93 1","pages":"427-433"},"PeriodicalIF":0.0,"publicationDate":"2015-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75800192","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 : 2015-10-29DOI: 10.1109/ECCE.2015.7310101
Abiezer Tejeda, G. Covic, J. Boys
This paper introduces a new ferrite-less magnetic structure for roadway charging of Electric Vehicles (EVs). Most of the existing magnetic pads for roadside EV charging rely on ferrimagnetic materials to produce single-sided flux and boost power levels while minimizing undesired field emissions and losses. But the properties that roadway pads must have are mechanical robustness coupled with the ability to throw single-sided, high arching flux while being subjected to stringent conditions under asphalt, bitumen, or concrete. Ferrite is very brittle and expensive and its performance under transient forces when buried under a roadway is questionable. This new ferrite-less magnetic coupler is proposed as a primary pad for roadway EV charging. Simulated and experimental results are shown, followed by a discussion on its capabilities, limitations, and possible updates.
{"title":"Novel single-sided ferrite-less magnetic coupler for roadway EV charging","authors":"Abiezer Tejeda, G. Covic, J. Boys","doi":"10.1109/ECCE.2015.7310101","DOIUrl":"https://doi.org/10.1109/ECCE.2015.7310101","url":null,"abstract":"This paper introduces a new ferrite-less magnetic structure for roadway charging of Electric Vehicles (EVs). Most of the existing magnetic pads for roadside EV charging rely on ferrimagnetic materials to produce single-sided flux and boost power levels while minimizing undesired field emissions and losses. But the properties that roadway pads must have are mechanical robustness coupled with the ability to throw single-sided, high arching flux while being subjected to stringent conditions under asphalt, bitumen, or concrete. Ferrite is very brittle and expensive and its performance under transient forces when buried under a roadway is questionable. This new ferrite-less magnetic coupler is proposed as a primary pad for roadway EV charging. Simulated and experimental results are shown, followed by a discussion on its capabilities, limitations, and possible updates.","PeriodicalId":6654,"journal":{"name":"2015 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"35 1","pages":"3148-3153"},"PeriodicalIF":0.0,"publicationDate":"2015-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75846693","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 : 2015-10-29DOI: 10.1109/ECCE.2015.7310114
Liang Jia, Yanfei Liu, David Fang
Single stage Flyback converter with active power factor correction (PFC) function built-in is very popular for low power LED driver application. However, a universal driver design (120V~277Vac wide input) for meeting PF>0.90 and THD<;20% at 50% of maximum output power remains very challenging using peak current transition mode (PCTM) PFC control. Therefore, in this paper, a novel and practical scheme is presented for a single stage Flyback LED driver to achieve high power factor for universal input. Based on LED output feedback, the off-time is controlled to operate the Flyback converter in discontinuous conduction mode (DCM) to realize high PF. The control implementation can be adapted to existing popular PCTM PFC controller and due to the secondary side current regulation, it is suitable for dimmable LED driver application. A 22W dimmable LED driver is prototyped to verify this scheme and at 10W output power, PF>0.90 and THD<;20% are achieved for the universal input voltage range.
{"title":"High power factor single stage flyback converter for dimmable LED driver","authors":"Liang Jia, Yanfei Liu, David Fang","doi":"10.1109/ECCE.2015.7310114","DOIUrl":"https://doi.org/10.1109/ECCE.2015.7310114","url":null,"abstract":"Single stage Flyback converter with active power factor correction (PFC) function built-in is very popular for low power LED driver application. However, a universal driver design (120V~277Vac wide input) for meeting PF>0.90 and THD<;20% at 50% of maximum output power remains very challenging using peak current transition mode (PCTM) PFC control. Therefore, in this paper, a novel and practical scheme is presented for a single stage Flyback LED driver to achieve high power factor for universal input. Based on LED output feedback, the off-time is controlled to operate the Flyback converter in discontinuous conduction mode (DCM) to realize high PF. The control implementation can be adapted to existing popular PCTM PFC controller and due to the secondary side current regulation, it is suitable for dimmable LED driver application. A 22W dimmable LED driver is prototyped to verify this scheme and at 10W output power, PF>0.90 and THD<;20% are achieved for the universal input voltage range.","PeriodicalId":6654,"journal":{"name":"2015 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"46 1","pages":"3231-3238"},"PeriodicalIF":0.0,"publicationDate":"2015-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73005180","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 : 2015-10-29DOI: 10.1109/ECCE.2015.7310506
Lang Huang, Xu Yang, Xin Ma, Bin Zhang, Liang Qiao, Mofan Tian
The modular multilevel converter (MMC) is a competitive candidate for medium/high-power applications, specifically for high-voltage direct current transmission systems. Model predictive control (MPC) is an advanced and flexible method for power converters. The existing MPC methods for the MMC 3-phase system treat whole system as a three independent single phase system, and the computational load increases geometrically according to the increase of the level of the MMC. This paper proposes a space-vectors based hierarchical model predictive control (HMPC) strategy for a 3-phase MMC system with independent cost functions. Three hierarchical mathematical models of the MMC are derived and discretized to predict the AC-side current, circulating current and capacitor voltage, respectively. By utilizing multilevel space-vectors and hierarchical model, the considered number of states can be reduced significantly with the highest DC voltage utilization ratio and good performance. In addition, this strategy doesn't need the complex capacitor voltage sorting method and reduces the power loss by avoiding the unnecessary switching state transitions. The performance of the proposed strategy for 11-level MMC is verified through simulation results.
{"title":"Space-vectors based hierarchical model predictive control for a modular multilevel converter","authors":"Lang Huang, Xu Yang, Xin Ma, Bin Zhang, Liang Qiao, Mofan Tian","doi":"10.1109/ECCE.2015.7310506","DOIUrl":"https://doi.org/10.1109/ECCE.2015.7310506","url":null,"abstract":"The modular multilevel converter (MMC) is a competitive candidate for medium/high-power applications, specifically for high-voltage direct current transmission systems. Model predictive control (MPC) is an advanced and flexible method for power converters. The existing MPC methods for the MMC 3-phase system treat whole system as a three independent single phase system, and the computational load increases geometrically according to the increase of the level of the MMC. This paper proposes a space-vectors based hierarchical model predictive control (HMPC) strategy for a 3-phase MMC system with independent cost functions. Three hierarchical mathematical models of the MMC are derived and discretized to predict the AC-side current, circulating current and capacitor voltage, respectively. By utilizing multilevel space-vectors and hierarchical model, the considered number of states can be reduced significantly with the highest DC voltage utilization ratio and good performance. In addition, this strategy doesn't need the complex capacitor voltage sorting method and reduces the power loss by avoiding the unnecessary switching state transitions. The performance of the proposed strategy for 11-level MMC is verified through simulation results.","PeriodicalId":6654,"journal":{"name":"2015 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"133 1","pages":"6037-6042"},"PeriodicalIF":0.0,"publicationDate":"2015-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75486168","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}
In case of the grid connected transformerless photovoltaic (PV) inverter, the leakage current through the parasitic capacitance of the PV panel can cause very serious electromagnetic interference problems. In this paper, a more accurate high frequency PV array model is proposed. It includes the influence of PV frame, mounting rack, solar cell material and area. Based upon that model, the common mode leakage current is predicted through numerical analysis and calculation. The accuracy of the theoretical results is certified by MATLAB simulation and experimental test. This developed method can be easily incorporated into PV inverter system for further device/circuit design optimization with various panel parameters.
{"title":"Prediction of leakage current in transformerless photovoltaic inverter system by a more accurate method","authors":"Xiaomei Song, Wenjie Chen, Jiao Zhang, Xu Yang, Hao Huang","doi":"10.1109/ECCE.2015.7310127","DOIUrl":"https://doi.org/10.1109/ECCE.2015.7310127","url":null,"abstract":"In case of the grid connected transformerless photovoltaic (PV) inverter, the leakage current through the parasitic capacitance of the PV panel can cause very serious electromagnetic interference problems. In this paper, a more accurate high frequency PV array model is proposed. It includes the influence of PV frame, mounting rack, solar cell material and area. Based upon that model, the common mode leakage current is predicted through numerical analysis and calculation. The accuracy of the theoretical results is certified by MATLAB simulation and experimental test. This developed method can be easily incorporated into PV inverter system for further device/circuit design optimization with various panel parameters.","PeriodicalId":6654,"journal":{"name":"2015 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"29 1","pages":"3314-3318"},"PeriodicalIF":0.0,"publicationDate":"2015-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75609810","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 : 2015-10-29DOI: 10.1109/ECCE.2015.7310345
R. Wróbel, S. Williamson, J. Booker, P. Mellor
This paper presents results from an analysis of alternative slot liner materials used in the construction of electrical machines. The slot liner material has a vital safety critical function within a machine assembly, providing electrical insulation between the winding body and stator core pack. Performance measures for the slot liner material include the dielectric breakdown voltage, tensile strength, thermal conductivity and thermal class, amongst others. There is a large variety of slot liner materials available on the market with the material properties altered to suit a particular application. Some of these material properties are strongly dependent on the components and processes employed in construction of the complete winding assembly e.g. type of the winding impregnation and/or method used in impregnation of the stator/winding assembly. Consequently, the manufacturer provided data is usually inadequate when comparing various insulation systems and their individual elements for a particular machine construction. This research is focused on the conductive heat transfer phenomenon from the winding body into the machine periphery in context of the slot liner material used, for a given impregnation type and method. The repeatability of the winding manufacture process is also investigated. Three alternative slot liner materials with different thermal conductivity and ability of absorbing varnish impregnation have been chosen for prototyping of representative stator/winding hardware exemplars. This has been supplemented with a batch manufacture of the stator-winding hardware exemplar for a selected slot liner material. The proposed experimental approach allows for the complete insulation system to be evaluated accounting for the assembly and manufacture nuances. The results suggest that the use of a particular slot liner has an impact on the winding heat transfer and also implications regarding appropriate manufacture and assembly processes used, i.e. some of the materials require special handling. The experimental work has been supplemented with theoretical analysis to provide a more comprehensive insight into the winding heat transfer phenomena.
{"title":"Characterising the performance of selected electrical machine insulation systems","authors":"R. Wróbel, S. Williamson, J. Booker, P. Mellor","doi":"10.1109/ECCE.2015.7310345","DOIUrl":"https://doi.org/10.1109/ECCE.2015.7310345","url":null,"abstract":"This paper presents results from an analysis of alternative slot liner materials used in the construction of electrical machines. The slot liner material has a vital safety critical function within a machine assembly, providing electrical insulation between the winding body and stator core pack. Performance measures for the slot liner material include the dielectric breakdown voltage, tensile strength, thermal conductivity and thermal class, amongst others. There is a large variety of slot liner materials available on the market with the material properties altered to suit a particular application. Some of these material properties are strongly dependent on the components and processes employed in construction of the complete winding assembly e.g. type of the winding impregnation and/or method used in impregnation of the stator/winding assembly. Consequently, the manufacturer provided data is usually inadequate when comparing various insulation systems and their individual elements for a particular machine construction. This research is focused on the conductive heat transfer phenomenon from the winding body into the machine periphery in context of the slot liner material used, for a given impregnation type and method. The repeatability of the winding manufacture process is also investigated. Three alternative slot liner materials with different thermal conductivity and ability of absorbing varnish impregnation have been chosen for prototyping of representative stator/winding hardware exemplars. This has been supplemented with a batch manufacture of the stator-winding hardware exemplar for a selected slot liner material. The proposed experimental approach allows for the complete insulation system to be evaluated accounting for the assembly and manufacture nuances. The results suggest that the use of a particular slot liner has an impact on the winding heat transfer and also implications regarding appropriate manufacture and assembly processes used, i.e. some of the materials require special handling. The experimental work has been supplemented with theoretical analysis to provide a more comprehensive insight into the winding heat transfer phenomena.","PeriodicalId":6654,"journal":{"name":"2015 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"5 1","pages":"4857-4864"},"PeriodicalIF":0.0,"publicationDate":"2015-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78932641","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 : 2015-10-29DOI: 10.1109/ECCE.2015.7310377
Xiucheng Huang, W. Du, F. Lee, Qiang Li
Synchronous rectifier (SR) is widely used in flyback converter to reduce the output side conduction loss in order to meet the system conversion efficiency requirement. The conventional SR driving methods are not suitable for high frequency (>500kHz) application. This paper proposes a novel SR driving method for MHz flyback converter operating at critical conduction mode (CRM). A RC network is in parallel with SR to emulate the magnetizing current of flyback converter. The sensing signal is clean and immune to the parasitic ringing caused by the leakage inductance and parasitic capacitors. SR gate signal is accurately generated based on a simple signal processing circuit and the conduction loss of SR body diode is minimized. The theoretical analysis is validated by simulation and experiment.
{"title":"A novel driving scheme for synchronous rectifier in MHz CRM flyback converter with GaN devices","authors":"Xiucheng Huang, W. Du, F. Lee, Qiang Li","doi":"10.1109/ECCE.2015.7310377","DOIUrl":"https://doi.org/10.1109/ECCE.2015.7310377","url":null,"abstract":"Synchronous rectifier (SR) is widely used in flyback converter to reduce the output side conduction loss in order to meet the system conversion efficiency requirement. The conventional SR driving methods are not suitable for high frequency (>500kHz) application. This paper proposes a novel SR driving method for MHz flyback converter operating at critical conduction mode (CRM). A RC network is in parallel with SR to emulate the magnetizing current of flyback converter. The sensing signal is clean and immune to the parasitic ringing caused by the leakage inductance and parasitic capacitors. SR gate signal is accurately generated based on a simple signal processing circuit and the conduction loss of SR body diode is minimized. The theoretical analysis is validated by simulation and experiment.","PeriodicalId":6654,"journal":{"name":"2015 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"14 1","pages":"5089-5095"},"PeriodicalIF":0.0,"publicationDate":"2015-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78200752","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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