Pub Date : 2016-12-01DOI: 10.1109/SPEC.2016.7846119
M. Tahir, Geoffrey R Walker, M. Broadmeadow, S. M. Bulmer, G. Ledwich
This paper proposes the development of a new digital pulse width modulation (PWM) scheme for aplication to both single phase and multiphase voltage regulation modules (VRMs), which are used as processor power supplies. A comparative analysis of this novel phase accumulator based PWM generation technique is presented with the traditionally used counter based PWM approach for synchronous buck converter topologies. A simulation study of open loop systems of these digital techniques is carried out to demonstrate their feasibility and performance characteristics. For practical evaluation of these two techniques, experiments in single-phase and eight-phase 12 V to 1V buck converter controlled by an FPGA are performed by using the 16 bit phase accumulator and counter. The impact from the interleaving strategy is presented and peak-to-peak voltage ripple and output spectra are evaluated.
{"title":"Comparative analysis of FPGA-based digital pulse width modulation techniques for multiphase DC-DC converters","authors":"M. Tahir, Geoffrey R Walker, M. Broadmeadow, S. M. Bulmer, G. Ledwich","doi":"10.1109/SPEC.2016.7846119","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846119","url":null,"abstract":"This paper proposes the development of a new digital pulse width modulation (PWM) scheme for aplication to both single phase and multiphase voltage regulation modules (VRMs), which are used as processor power supplies. A comparative analysis of this novel phase accumulator based PWM generation technique is presented with the traditionally used counter based PWM approach for synchronous buck converter topologies. A simulation study of open loop systems of these digital techniques is carried out to demonstrate their feasibility and performance characteristics. For practical evaluation of these two techniques, experiments in single-phase and eight-phase 12 V to 1V buck converter controlled by an FPGA are performed by using the 16 bit phase accumulator and counter. The impact from the interleaving strategy is presented and peak-to-peak voltage ripple and output spectra are evaluated.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122296727","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 : 2016-12-01DOI: 10.1109/SPEC.2016.7846004
L. Peters, J. Schellekens, F. Clermonts, J. Duarte
Due to the flybacks' indirect characteristic of energy transfer, the transformer size increases for high power levels. Providing an additional direct energy transfer path can decrease its size. Parallel forward-flyback converters offer such functionality and outperform forward converters with regard to PFC functionality. A balanced forward-flyback converter is a variation on this kind of parallel converter. The forward and flyback sub-converters share a transformer winding and an additional balancing capacitor enables even better AC line voltage utilization. This paper starts with an in-depth analysis of the balanced forward-flyback converter, and introduces ten operating modes in which this converter can operate. A boundary-conduction mode (BCM) controller for the magnetization current is developed and presented, and through simulations the PFC performance of the converter is tested with a constant switch on-time controller. Moreover, a prototype is designed and built with both a dissipative R-C-D snubber and two-switch clamp configuration. Experimental results from the 100W/120–373V AC/DC prototype were obtained to prove the converter operation and BCM controller concept. The balanced forward-flyback converter in BCM offers good PFC performance and manages a THD of input current between 1.69% and 4.38%.
{"title":"Off-line balanced forward-flyback converter","authors":"L. Peters, J. Schellekens, F. Clermonts, J. Duarte","doi":"10.1109/SPEC.2016.7846004","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846004","url":null,"abstract":"Due to the flybacks' indirect characteristic of energy transfer, the transformer size increases for high power levels. Providing an additional direct energy transfer path can decrease its size. Parallel forward-flyback converters offer such functionality and outperform forward converters with regard to PFC functionality. A balanced forward-flyback converter is a variation on this kind of parallel converter. The forward and flyback sub-converters share a transformer winding and an additional balancing capacitor enables even better AC line voltage utilization. This paper starts with an in-depth analysis of the balanced forward-flyback converter, and introduces ten operating modes in which this converter can operate. A boundary-conduction mode (BCM) controller for the magnetization current is developed and presented, and through simulations the PFC performance of the converter is tested with a constant switch on-time controller. Moreover, a prototype is designed and built with both a dissipative R-C-D snubber and two-switch clamp configuration. Experimental results from the 100W/120–373V AC/DC prototype were obtained to prove the converter operation and BCM controller concept. The balanced forward-flyback converter in BCM offers good PFC performance and manages a THD of input current between 1.69% and 4.38%.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114425582","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 : 2016-12-01DOI: 10.1109/SPEC.2016.7846217
A. Mohamed, A. Berzoy, O. Mohammed
This paper presents a new methodology of active power flow control for a bidirectional inductive wireless power transfer (BIWPT) system in electric vehicle (EV) ancillary services based on the system analytical model. The controller exists on the vehicle side to consider the EV's owner's desire for providing energy to the other sources. The owner is able to choose between three different control modes; Charge, Discharge and Abstain (no interaction). The controller considers the EV's battery state-of-charge (SOC) which is provided by the battery management system (BMS). The control parameters are predicted based on a simple and an accurate analytical model for the BIWPT system. The misalignment effect on the controller performance is considered by adaptively estimating the wireless pads mutual inductance. The proposed controller is implemented and tested by means of simulations and experiments for stationary and quasi-dynamic wireless power transfer situations.
{"title":"Predictive active power-flow control of two-way wireless power transfer system in V2G services","authors":"A. Mohamed, A. Berzoy, O. Mohammed","doi":"10.1109/SPEC.2016.7846217","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846217","url":null,"abstract":"This paper presents a new methodology of active power flow control for a bidirectional inductive wireless power transfer (BIWPT) system in electric vehicle (EV) ancillary services based on the system analytical model. The controller exists on the vehicle side to consider the EV's owner's desire for providing energy to the other sources. The owner is able to choose between three different control modes; Charge, Discharge and Abstain (no interaction). The controller considers the EV's battery state-of-charge (SOC) which is provided by the battery management system (BMS). The control parameters are predicted based on a simple and an accurate analytical model for the BIWPT system. The misalignment effect on the controller performance is considered by adaptively estimating the wireless pads mutual inductance. The proposed controller is implemented and tested by means of simulations and experiments for stationary and quasi-dynamic wireless power transfer situations.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114491942","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 : 2016-12-01DOI: 10.1109/SPEC.2016.7846112
C. Townsend, R. Aguilera, P. Acuña, G. Konstantinou, J. Pou, G. Mirzaeva, G. Goodwin
The superior harmonic performance of the modular multilevel converter facilitates reduction in passive filtering requirements. However, in practice, any volume and weight reduction brought about by using smaller filtering components, is offset by the increase in stored capacitor energy inside the converter. This paper proposes injection of high-frequency circulating currents and zero-sequence voltages, that significantly reduce capacitor voltage ripple. This can ultimately facilitate use of smaller capacitances. Optimal reference voltages and currents are designed off-line, with a model predictive control scheme used to track the references on-line while also compensating for any disturbances introduced by the practical system.
{"title":"Capacitance minimization in modular multilevel converters: Using model predictive control to inject optimal circulating currents and zero-sequence voltage","authors":"C. Townsend, R. Aguilera, P. Acuña, G. Konstantinou, J. Pou, G. Mirzaeva, G. Goodwin","doi":"10.1109/SPEC.2016.7846112","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846112","url":null,"abstract":"The superior harmonic performance of the modular multilevel converter facilitates reduction in passive filtering requirements. However, in practice, any volume and weight reduction brought about by using smaller filtering components, is offset by the increase in stored capacitor energy inside the converter. This paper proposes injection of high-frequency circulating currents and zero-sequence voltages, that significantly reduce capacitor voltage ripple. This can ultimately facilitate use of smaller capacitances. Optimal reference voltages and currents are designed off-line, with a model predictive control scheme used to track the references on-line while also compensating for any disturbances introduced by the practical system.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122080541","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}
The modular multilevel converter(MMC) is one of the most attractive converter topologies for high or medium voltage power system. In this paper, a combination of modular multilevel converter and dual active bridge(DAB) is discussed. The DAB assisted MMC(MMC-DAB) is capable of low frequency output with elimination of capacitor voltage fluctuations in submodules. This paper analyzes the MMC-DAB structure and its control strategy. A MMC-DAB simulation model is built in the PSCAD/EMTDC software environment. The effectiveness of the MMC-DAB topology is verified by simulation results.
{"title":"Dual active bridge assisted modular multilevel converter allowing low frequency output","authors":"Shuguang Song, Jinjun Liu, Shaodi Ouyang, Xingxing Chen","doi":"10.1109/SPEC.2016.7846125","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846125","url":null,"abstract":"The modular multilevel converter(MMC) is one of the most attractive converter topologies for high or medium voltage power system. In this paper, a combination of modular multilevel converter and dual active bridge(DAB) is discussed. The DAB assisted MMC(MMC-DAB) is capable of low frequency output with elimination of capacitor voltage fluctuations in submodules. This paper analyzes the MMC-DAB structure and its control strategy. A MMC-DAB simulation model is built in the PSCAD/EMTDC software environment. The effectiveness of the MMC-DAB topology is verified by simulation results.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128358753","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}
Aiming at the influence of nonlinear loads on the quality of power grid, a shunt active power filter (SAPF) topology is proposed. According to this topology, the mathematical model of the three-phase shunt active power filter is established. Based on the model, it's transfer function is deduced, and the current controller is designed on account of PI control strategy. By analyzing the limitation of the PI controller in current tracking control method used for active power filters, a composite control strategy combining repetitive control with PI control method is proposed to improve the steady performance of the control system. Experimental results demonstrate that the current control method combining repetitive control with PI control method has a high steady-state compensation accuracy, which can effectively suppress harmonic currents caused by nonlinear loads and greatly improve grid current waveform.
{"title":"A composite current control method of the three phase shunt active power filter","authors":"Jiancheng Song, Feiyan Tian, Yunguang Gao, Lijun Zheng","doi":"10.1109/SPEC.2016.7846017","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846017","url":null,"abstract":"Aiming at the influence of nonlinear loads on the quality of power grid, a shunt active power filter (SAPF) topology is proposed. According to this topology, the mathematical model of the three-phase shunt active power filter is established. Based on the model, it's transfer function is deduced, and the current controller is designed on account of PI control strategy. By analyzing the limitation of the PI controller in current tracking control method used for active power filters, a composite control strategy combining repetitive control with PI control method is proposed to improve the steady performance of the control system. Experimental results demonstrate that the current control method combining repetitive control with PI control method has a high steady-state compensation accuracy, which can effectively suppress harmonic currents caused by nonlinear loads and greatly improve grid current waveform.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129639279","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 : 2016-12-01DOI: 10.1109/SPEC.2016.7846218
Gaurav R. Kalra, Chang-Yu Huang, Duleepa J Thirmawithana, U. Madawala, M. Neuburger
Bi-directional inductive power transfer (BD-IPT) systems are becoming popular as a technology suitable for implementing vehicle-to-grid (V2G) systems due mainly to convenience, simplicity and safety offered by this technology. Although a number of grid integration technologies suitable for BD-IPT systems have been proposed in the past, a comparison between these technologies is yet to be presented. As such, this paper intends to provide a comparative overview of 3 different grid integration technologies employed by BD-IPT systems. These include, the conventional implementation, matrix converter based implementation, and an active filtering based implementation. A system level overview of each technology, mathematical models and guidelines for sizing energy storage components are presented. Simulation results of each system rated to 3.3 kW are also presented. With the aid of simulations, the functionality of each grid-integration technology is investigated and compared. A detailed loss analysis and an investigation in to effects of component sizing on system performance are also presented.
{"title":"A comparative study on grid-integration techniques used in bi-directional IPT based V2G applications","authors":"Gaurav R. Kalra, Chang-Yu Huang, Duleepa J Thirmawithana, U. Madawala, M. Neuburger","doi":"10.1109/SPEC.2016.7846218","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846218","url":null,"abstract":"Bi-directional inductive power transfer (BD-IPT) systems are becoming popular as a technology suitable for implementing vehicle-to-grid (V2G) systems due mainly to convenience, simplicity and safety offered by this technology. Although a number of grid integration technologies suitable for BD-IPT systems have been proposed in the past, a comparison between these technologies is yet to be presented. As such, this paper intends to provide a comparative overview of 3 different grid integration technologies employed by BD-IPT systems. These include, the conventional implementation, matrix converter based implementation, and an active filtering based implementation. A system level overview of each technology, mathematical models and guidelines for sizing energy storage components are presented. Simulation results of each system rated to 3.3 kW are also presented. With the aid of simulations, the functionality of each grid-integration technology is investigated and compared. A detailed loss analysis and an investigation in to effects of component sizing on system performance are also presented.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123503810","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 : 2016-12-01DOI: 10.1109/SPEC.2016.7846085
Anping Tong, L. Hang, Guojie Li, Minglin Zhu, D. Xie
A common duty ratio control method, which features zero voltage switching for all devices of input inverting H bridge and zero current switching for all devices of output rectifying H bridge, for series resonant dual active bridge converter is proposed in this paper. The detailed operation principles of the common duty ratio control method are presented. Moreover, the steady state of the converter is analyzed. The output voltage will not change under wide load variation even without voltage control loop and the converter shows the rigid output characteristic under the common duty ratio control. At last, the MATLAB model is constructed and the simulation results verify the theoretical analysis.
{"title":"Common duty ratio control of series resonant dual active bridge converter","authors":"Anping Tong, L. Hang, Guojie Li, Minglin Zhu, D. Xie","doi":"10.1109/SPEC.2016.7846085","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846085","url":null,"abstract":"A common duty ratio control method, which features zero voltage switching for all devices of input inverting H bridge and zero current switching for all devices of output rectifying H bridge, for series resonant dual active bridge converter is proposed in this paper. The detailed operation principles of the common duty ratio control method are presented. Moreover, the steady state of the converter is analyzed. The output voltage will not change under wide load variation even without voltage control loop and the converter shows the rigid output characteristic under the common duty ratio control. At last, the MATLAB model is constructed and the simulation results verify the theoretical analysis.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121435042","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 : 2016-12-01DOI: 10.1109/SPEC.2016.7845530
Guangye Si, Z. Shen, Zhenbin Zhang, R. Kennel
In order to avoid a bridge shoot-through, a simultaneous on-state of both IGBTs in a bridge leg is strictly forbidden. Therefore, the complementary switch is commonly turned on with a dead-time interval to ensure a complete turn-off the other IGBT. Due to the longer tail-current interval of IGBT switching process, for the purpose of absolute safe operation, the interlocking time to is empirically in microsecond range which normally is much longer than necessary. This raises the questions about whether the tail-current is real a matter of concern, and how can the dead-time be minimized? An IGBT H-bridge inverter with an adjustable interlock time was built in this project, and a series of experiments were carried out to investigate the limiting factors of the dead-time minimization.
{"title":"Investigation of the limiting factors of the dead time minimization in a H-bridge IGBT inverter","authors":"Guangye Si, Z. Shen, Zhenbin Zhang, R. Kennel","doi":"10.1109/SPEC.2016.7845530","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7845530","url":null,"abstract":"In order to avoid a bridge shoot-through, a simultaneous on-state of both IGBTs in a bridge leg is strictly forbidden. Therefore, the complementary switch is commonly turned on with a dead-time interval to ensure a complete turn-off the other IGBT. Due to the longer tail-current interval of IGBT switching process, for the purpose of absolute safe operation, the interlocking time to is empirically in microsecond range which normally is much longer than necessary. This raises the questions about whether the tail-current is real a matter of concern, and how can the dead-time be minimized? An IGBT H-bridge inverter with an adjustable interlock time was built in this project, and a series of experiments were carried out to investigate the limiting factors of the dead-time minimization.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121552483","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 : 2016-12-01DOI: 10.1109/SPEC.2016.7846129
W. Malan, D. M. Vilathgamuwa, Geoffrey R Walker, M. Hiller
Multi-port dc-ac and dc-dc converters are of great interest for applications where electricity is generated through a variety of energy sources and where energy storage systems are required. In this paper, a three-port, dc-dc-ac Solid State Transformer (SST) is presented that can control the magnitude and direction of power transfer between a battery, a dc bus and the ac grid. The proposed SST features a low magnetic component count, has high power density, high efficiency and provides galvanic isolation between all three ports. The presented topology is operated with a fixed switching frequency and is phase shift modulated. In this paper, a mathematical analysis of the proposed SST is presented along with its sensitivity to parameter variation. The requirements for soft switching is derived and it is demonstrated that the converter can soft switch over large input voltage variation. The modulation parameters are optimized so that the high frequency link currents are minimized while soft switching is maintained. Additionally, in the simulation results, the ac grid current is modulated so that no Power Factor Correction (PFC) circuitry is required.
{"title":"A three port resonant solid state transformer with minimized circulating reactive currents in the high frequency link","authors":"W. Malan, D. M. Vilathgamuwa, Geoffrey R Walker, M. Hiller","doi":"10.1109/SPEC.2016.7846129","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846129","url":null,"abstract":"Multi-port dc-ac and dc-dc converters are of great interest for applications where electricity is generated through a variety of energy sources and where energy storage systems are required. In this paper, a three-port, dc-dc-ac Solid State Transformer (SST) is presented that can control the magnitude and direction of power transfer between a battery, a dc bus and the ac grid. The proposed SST features a low magnetic component count, has high power density, high efficiency and provides galvanic isolation between all three ports. The presented topology is operated with a fixed switching frequency and is phase shift modulated. In this paper, a mathematical analysis of the proposed SST is presented along with its sensitivity to parameter variation. The requirements for soft switching is derived and it is demonstrated that the converter can soft switch over large input voltage variation. The modulation parameters are optimized so that the high frequency link currents are minimized while soft switching is maintained. Additionally, in the simulation results, the ac grid current is modulated so that no Power Factor Correction (PFC) circuitry is required.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124432815","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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