Pub Date : 2016-03-20DOI: 10.1109/APEC.2016.7468188
Yang Chen, Hongliang Wang, Yanfei Liu, J. Afsharian, Z. Yang
This paper proposes a new half bridge (HB) LLC resonant converter with pulse width modulated (PWM) auxiliary switch (sLLC converter) for hold-up mode operation. The proposed sLLC converter works with synchronous rectifier (SR), which is suitable for low output voltage applications. The magnetizing inductor can be designed with large value to reduce the circulation loss. In the proposed sLLC converter, the auxiliary switch and diode branch will provide charging path for the resonant inductor. For nominal 400V input, sLLC achieves same performance as conventional LLC converter, and all the good features such as soft switching are naturally retained. For slight input voltage fluctuation, frequency modulation is used to regulate the output voltage. When the input voltage drops further, HB switches will operate at constant minimum frequency, and the auxiliary switch will operate in PWM mode to energize the resonant inductor with 400V bus directly during hold up period, thus the output voltage can be maintained at desired level. To verify the effectiveness of the proposed sLLC converter, operational principle and equivalent circuit will be carefully explained and analyzed in this paper. A 300W prototype is built for 250V-400V input, 12V output application.
{"title":"LLC converter with auxiliary switch for hold up mode operation","authors":"Yang Chen, Hongliang Wang, Yanfei Liu, J. Afsharian, Z. Yang","doi":"10.1109/APEC.2016.7468188","DOIUrl":"https://doi.org/10.1109/APEC.2016.7468188","url":null,"abstract":"This paper proposes a new half bridge (HB) LLC resonant converter with pulse width modulated (PWM) auxiliary switch (sLLC converter) for hold-up mode operation. The proposed sLLC converter works with synchronous rectifier (SR), which is suitable for low output voltage applications. The magnetizing inductor can be designed with large value to reduce the circulation loss. In the proposed sLLC converter, the auxiliary switch and diode branch will provide charging path for the resonant inductor. For nominal 400V input, sLLC achieves same performance as conventional LLC converter, and all the good features such as soft switching are naturally retained. For slight input voltage fluctuation, frequency modulation is used to regulate the output voltage. When the input voltage drops further, HB switches will operate at constant minimum frequency, and the auxiliary switch will operate in PWM mode to energize the resonant inductor with 400V bus directly during hold up period, thus the output voltage can be maintained at desired level. To verify the effectiveness of the proposed sLLC converter, operational principle and equivalent circuit will be carefully explained and analyzed in this paper. A 300W prototype is built for 250V-400V input, 12V output application.","PeriodicalId":143091,"journal":{"name":"2016 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128116110","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 : 2016-03-20DOI: 10.1109/APEC.2016.7467852
Bruno R. de Almeida, D. de Souza Oliveira, P. Praça
This paper proposes a single-stage three-phase rectifier with high-frequency isolation, power factor correction, and bidirectional power flow. The presented topology is adequate for dc grids (or smart-grids), telecommunications (telecom) power supplies, and more recent applications such as electric vehicles. The converter is based on the three-phase version of the dual active bridge (DAB) associated with the three-state-switching cell (3SSC), whose power flow between the primary and secondary sides is controlled by the phase-shift angle. A theoretical analysis is presented and validated through simulation and experimental.
{"title":"A bidirectional single-stage three-phase rectifier with high-frequency isolation and power factor correction","authors":"Bruno R. de Almeida, D. de Souza Oliveira, P. Praça","doi":"10.1109/APEC.2016.7467852","DOIUrl":"https://doi.org/10.1109/APEC.2016.7467852","url":null,"abstract":"This paper proposes a single-stage three-phase rectifier with high-frequency isolation, power factor correction, and bidirectional power flow. The presented topology is adequate for dc grids (or smart-grids), telecommunications (telecom) power supplies, and more recent applications such as electric vehicles. The converter is based on the three-phase version of the dual active bridge (DAB) associated with the three-state-switching cell (3SSC), whose power flow between the primary and secondary sides is controlled by the phase-shift angle. A theoretical analysis is presented and validated through simulation and experimental.","PeriodicalId":143091,"journal":{"name":"2016 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128195124","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 : 2016-03-20DOI: 10.1109/APEC.2016.7468353
Rui Gao, I. Husain, A. Huang
The solid-state transformer (SST) enabled DC/AC Microgrid provides an effective solution for distributed renewable energy resources (DRER) integration with conventional utility grid. This paper investigates a DC network system consisting of wind turbines, SST, and DC loads. Without any energy storage devices, an autonomous power management strategy based on improved DC bus signaling (DBS) is proposed to achieve system stable operation and power balance under various scenarios, specifically system grid-connected mode, islanding mode, and the mode transition. The extreme conditions were emphasized and analyzed as a testament to verify the feasibility of proposed control. DC bus voltage level and its gradient information have been employed as the only indication for distinguishing different modes and control implementation. System power management competence has been simulated and verified with MATLAB/Simulink.
{"title":"An autonomous power management strategy based on DC bus signaling for solid-state transformer interfaced PMSG wind energy conversion system","authors":"Rui Gao, I. Husain, A. Huang","doi":"10.1109/APEC.2016.7468353","DOIUrl":"https://doi.org/10.1109/APEC.2016.7468353","url":null,"abstract":"The solid-state transformer (SST) enabled DC/AC Microgrid provides an effective solution for distributed renewable energy resources (DRER) integration with conventional utility grid. This paper investigates a DC network system consisting of wind turbines, SST, and DC loads. Without any energy storage devices, an autonomous power management strategy based on improved DC bus signaling (DBS) is proposed to achieve system stable operation and power balance under various scenarios, specifically system grid-connected mode, islanding mode, and the mode transition. The extreme conditions were emphasized and analyzed as a testament to verify the feasibility of proposed control. DC bus voltage level and its gradient information have been employed as the only indication for distinguishing different modes and control implementation. System power management competence has been simulated and verified with MATLAB/Simulink.","PeriodicalId":143091,"journal":{"name":"2016 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121759333","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 : 2016-03-20DOI: 10.1109/APEC.2016.7468374
Donghai Zhu, X. Zou, Y. Kang, Lu Deng, Qingjun Huang
For doubly fed induction generator (DFIG)-based wind turbine (WT), large electromotive force will be induced in the rotor circuit under grid faults, and the rotor side of DFIG is prone to suffering from overcurrent and overvoltage. To mitigate this problem, an inductance-simulating control strategy is proposed to enhance its low-voltage ride through (LVRT) capability. In this method, the rotor side converter (RSC) is controlled to simulating as an inductance. Furthermore, under proper inductance value, both the required rotor voltage and post-fault rotor current can be reduced within the permissible range. In addition, the electromagnetic torque ripple can be effectively eliminated. Finally, the simulation and experimental results clearly demonstrate the effectiveness of the proposed method.
{"title":"Inductance-simulating control for DFIG-based wind turbine to ride-through grid faults","authors":"Donghai Zhu, X. Zou, Y. Kang, Lu Deng, Qingjun Huang","doi":"10.1109/APEC.2016.7468374","DOIUrl":"https://doi.org/10.1109/APEC.2016.7468374","url":null,"abstract":"For doubly fed induction generator (DFIG)-based wind turbine (WT), large electromotive force will be induced in the rotor circuit under grid faults, and the rotor side of DFIG is prone to suffering from overcurrent and overvoltage. To mitigate this problem, an inductance-simulating control strategy is proposed to enhance its low-voltage ride through (LVRT) capability. In this method, the rotor side converter (RSC) is controlled to simulating as an inductance. Furthermore, under proper inductance value, both the required rotor voltage and post-fault rotor current can be reduced within the permissible range. In addition, the electromagnetic torque ripple can be effectively eliminated. Finally, the simulation and experimental results clearly demonstrate the effectiveness of the proposed method.","PeriodicalId":143091,"journal":{"name":"2016 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115891970","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 : 2016-03-20DOI: 10.1109/APEC.2016.7468281
S. Yin, K. Tseng, C. Tong, R. Simanjorang, C. Gajanayake, A. Gupta
The reactive power in power converter with inductive load (motor drive e.g.) requires a current commutation path for the freewheeling current. Due to the high voltage drop of body diode of SiC MOSFET, a SiC Schottky diode is normally recommended as the anti-parallel freewheeling diode for SiC MOSFET to suppress the conduction of body diode. However, since the MOSFET can work as synchronous rectifier, the freewheeling diode only conducts during the dead time, leading to a low utilization rate of device. In this work, the three-phase SiC inverter using synchronous rectification is investigated. The analytical model for inverter power loss with and without freewheeling diode is built. Based on the switching characterization, the inverter with synchronous rectification permits a surprising higher efficiency than that with freewheeling diode due to the reduced current overshoot at turn-on. And a 5 kW prototype of three-phase inverter is developed, which shows a 99% high efficiency at the switching frequency of 40 kHz. This work confirms the possibility to remove the freewheeling diode in SiC inverter without degrading the efficiency.
{"title":"A 99% efficiency SiC three-phase inverter using synchronous rectification","authors":"S. Yin, K. Tseng, C. Tong, R. Simanjorang, C. Gajanayake, A. Gupta","doi":"10.1109/APEC.2016.7468281","DOIUrl":"https://doi.org/10.1109/APEC.2016.7468281","url":null,"abstract":"The reactive power in power converter with inductive load (motor drive e.g.) requires a current commutation path for the freewheeling current. Due to the high voltage drop of body diode of SiC MOSFET, a SiC Schottky diode is normally recommended as the anti-parallel freewheeling diode for SiC MOSFET to suppress the conduction of body diode. However, since the MOSFET can work as synchronous rectifier, the freewheeling diode only conducts during the dead time, leading to a low utilization rate of device. In this work, the three-phase SiC inverter using synchronous rectification is investigated. The analytical model for inverter power loss with and without freewheeling diode is built. Based on the switching characterization, the inverter with synchronous rectification permits a surprising higher efficiency than that with freewheeling diode due to the reduced current overshoot at turn-on. And a 5 kW prototype of three-phase inverter is developed, which shows a 99% high efficiency at the switching frequency of 40 kHz. This work confirms the possibility to remove the freewheeling diode in SiC inverter without degrading the efficiency.","PeriodicalId":143091,"journal":{"name":"2016 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132053733","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 : 2016-03-20DOI: 10.1109/APEC.2016.7467966
I. Castro, D. G. Lamar, M. Arias, J. Sebastián, M. Hernando
This work presents a driver for High-Brightness Light-Emitting Diodes (HB-LED) in three-phase grids, which complies with IEC 1000-3-2 Class C requirements, achieves high Power Factor (PF), low Total Harmonic Distortion (THD), as well as, the capability to achieve full dimming while disposing of the bulk capacitor and having galvanic isolation. The HB-LED driver is based on the use of six four-port cells with their inputs connected to the three-phase network and their outputs connected in parallel. Each one of these cells is a DC/DC converter operating as a Loss-Free Resistor (LFR) based on the concept of a flyback operating in Discontinuous Conduction Mode (DCM). Moreover, it operates in the full range of the European three-phase line voltage, which varies between 380V and 420V, and it supplies an output voltage of 48V with maximum power of 90W.
{"title":"Three phase converter with galvanic isolation based on Loss-Free Resistors for HB-LED lighting applications","authors":"I. Castro, D. G. Lamar, M. Arias, J. Sebastián, M. Hernando","doi":"10.1109/APEC.2016.7467966","DOIUrl":"https://doi.org/10.1109/APEC.2016.7467966","url":null,"abstract":"This work presents a driver for High-Brightness Light-Emitting Diodes (HB-LED) in three-phase grids, which complies with IEC 1000-3-2 Class C requirements, achieves high Power Factor (PF), low Total Harmonic Distortion (THD), as well as, the capability to achieve full dimming while disposing of the bulk capacitor and having galvanic isolation. The HB-LED driver is based on the use of six four-port cells with their inputs connected to the three-phase network and their outputs connected in parallel. Each one of these cells is a DC/DC converter operating as a Loss-Free Resistor (LFR) based on the concept of a flyback operating in Discontinuous Conduction Mode (DCM). Moreover, it operates in the full range of the European three-phase line voltage, which varies between 380V and 420V, and it supplies an output voltage of 48V with maximum power of 90W.","PeriodicalId":143091,"journal":{"name":"2016 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132071835","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 : 2016-03-20DOI: 10.1109/APEC.2016.7468027
Handong Gui, Zhiliang Zhang, Dong-Jie Gu, Yang Yang, Zhou-Yu Lu, Yanfei Liu
This paper proposes a hierarchical battery balancing architecture for the series connected lithium-ion batteries. The battery cells are grouped into different packs and the bottom layer is the Adjacent Cell-to-Cell structure consisting of the packs. The top layer is connected to different packs and can deliver the energy from one pack to any other pack bi-directionally, leading to high flexibility. A multi-directional multi-port converter is proposed to serve as the top layer. With the hierarchical architecture, the balanced energy transfer of the cells in different packs can be decoupled, which avoid the repeated charging and discharging during the balancing process. This is beneficial for lengthening the battery lifetime and increasing the State-of-Health (SOH). Moreover, the proposed architecture can lower the current rating of the balancing circuits, which helps decrease the required cost and improve the system efficiency. The experimental results verified the benefits of the proposed architecture.
{"title":"A hierarchical active balancing architecture for Li-ion batteries","authors":"Handong Gui, Zhiliang Zhang, Dong-Jie Gu, Yang Yang, Zhou-Yu Lu, Yanfei Liu","doi":"10.1109/APEC.2016.7468027","DOIUrl":"https://doi.org/10.1109/APEC.2016.7468027","url":null,"abstract":"This paper proposes a hierarchical battery balancing architecture for the series connected lithium-ion batteries. The battery cells are grouped into different packs and the bottom layer is the Adjacent Cell-to-Cell structure consisting of the packs. The top layer is connected to different packs and can deliver the energy from one pack to any other pack bi-directionally, leading to high flexibility. A multi-directional multi-port converter is proposed to serve as the top layer. With the hierarchical architecture, the balanced energy transfer of the cells in different packs can be decoupled, which avoid the repeated charging and discharging during the balancing process. This is beneficial for lengthening the battery lifetime and increasing the State-of-Health (SOH). Moreover, the proposed architecture can lower the current rating of the balancing circuits, which helps decrease the required cost and improve the system efficiency. The experimental results verified the benefits of the proposed architecture.","PeriodicalId":143091,"journal":{"name":"2016 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132246219","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 : 2016-03-20DOI: 10.1109/APEC.2016.7467938
Iftekhar Hasan, Md Wasi Uddin, Y. Sozer
This paper presents a new concept of Transverse Flux Machine (TFM) design that uses rotary transformers to replace the Permanent Magnet (PM) field excitation in the rotor. The rotary transformer has an inductive interface that allows for contactless transfer of energy to the field windings embedded in the rotor core. In order to achieve high magnetic coupling, a highly permeable ferrite core is selected for the transformer which is excited with high electrical frequency of 100 kHz. A field power converter is used to regulate the transformer secondary winding voltage to maintain constant DC field in the rotor. The proposed TFM has a modular structure that is free of PM, which makes it cost-effective, without sacrificing its peak torque and power when compared to a similar sized PM based TFM.
{"title":"Transverse Flux Machines with rotary transformer concept for wide speed operations without using Permanent Magnet material","authors":"Iftekhar Hasan, Md Wasi Uddin, Y. Sozer","doi":"10.1109/APEC.2016.7467938","DOIUrl":"https://doi.org/10.1109/APEC.2016.7467938","url":null,"abstract":"This paper presents a new concept of Transverse Flux Machine (TFM) design that uses rotary transformers to replace the Permanent Magnet (PM) field excitation in the rotor. The rotary transformer has an inductive interface that allows for contactless transfer of energy to the field windings embedded in the rotor core. In order to achieve high magnetic coupling, a highly permeable ferrite core is selected for the transformer which is excited with high electrical frequency of 100 kHz. A field power converter is used to regulate the transformer secondary winding voltage to maintain constant DC field in the rotor. The proposed TFM has a modular structure that is free of PM, which makes it cost-effective, without sacrificing its peak torque and power when compared to a similar sized PM based TFM.","PeriodicalId":143091,"journal":{"name":"2016 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132372587","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 : 2016-03-20DOI: 10.1109/APEC.2016.7468359
Kaiyuan Li, K. Tseng
For a Li-ion battery based energy storage system, the state of energy is a key index for the energy management and operation optimization. In the actual Li-ion batteries based energy storage system in building environment, the varying load current will lead to the estimated battery's residual energy deviated from the real value. To solve this problem, an equivalent circuit model is presented for the Li-ion battery's state of energy estimation during and after discharging process. The state of energy is introduced in the proposed approach to replace the traditional index SOC, to describe the electrical behaviors and the residual energy of the Li-ion battery under dynamic load current conditions, so that the battery's internal energy loss on its internal resistance and during the electrochemical reaction processes, as well as the effects of the decrease of the OCV during discharging are taken into consideration. Experimental data of the previous study regarding energy efficiency of Li-ion batteries used as energy storage devices in building is utilized in the present study. Finally, the simulation results on 20 Ah LTO batteries indicate that the proposed equivalent circuit is competent to predict the state of energy accurately. What's more, state of energy appears an improvement over SOC in terms of accuracy in capturing battery's energy changes. Thus, this study provides a viable solution for estimating Li-ion battery's SOE and capturing the battery's energy behaviors under dynamic loads.
{"title":"An equivalent circuit model for state of energy estimation of lithium-ion battery","authors":"Kaiyuan Li, K. Tseng","doi":"10.1109/APEC.2016.7468359","DOIUrl":"https://doi.org/10.1109/APEC.2016.7468359","url":null,"abstract":"For a Li-ion battery based energy storage system, the state of energy is a key index for the energy management and operation optimization. In the actual Li-ion batteries based energy storage system in building environment, the varying load current will lead to the estimated battery's residual energy deviated from the real value. To solve this problem, an equivalent circuit model is presented for the Li-ion battery's state of energy estimation during and after discharging process. The state of energy is introduced in the proposed approach to replace the traditional index SOC, to describe the electrical behaviors and the residual energy of the Li-ion battery under dynamic load current conditions, so that the battery's internal energy loss on its internal resistance and during the electrochemical reaction processes, as well as the effects of the decrease of the OCV during discharging are taken into consideration. Experimental data of the previous study regarding energy efficiency of Li-ion batteries used as energy storage devices in building is utilized in the present study. Finally, the simulation results on 20 Ah LTO batteries indicate that the proposed equivalent circuit is competent to predict the state of energy accurately. What's more, state of energy appears an improvement over SOC in terms of accuracy in capturing battery's energy changes. Thus, this study provides a viable solution for estimating Li-ion battery's SOE and capturing the battery's energy behaviors under dynamic loads.","PeriodicalId":143091,"journal":{"name":"2016 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129997226","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 : 2016-03-20DOI: 10.1109/APEC.2016.7467880
J. Fedison, M. Harrison
In this work, a Sawyer-Tower circuit is employed to characterize the output capacitance (COSS) of advanced superjunction MOSFETs. It is shown that some of the most advanced superjunction MOSFETs exhibit significant hysteresis in their output capacitance which leads to unrecoverable power loss. This work shows that the conventional impedance analyzer method can only measure COSS accurately when hysteresis is not present while measurement of COSS with a Sawyer-Tower circuit gives accurate results regardless of whether hysteresis is present or not. Accurate measurement of COSS with a Sawyer-Tower circuit not only enables designers to more accurately calculate and predict power loss but even more importantly allows the power semiconductor industry to more effectively advance future generations of superjunction MOSFETs for optimum efficiency, especially for use in resonant converter applications.
{"title":"COSS hysteresis in advanced superjunction MOSFETs","authors":"J. Fedison, M. Harrison","doi":"10.1109/APEC.2016.7467880","DOIUrl":"https://doi.org/10.1109/APEC.2016.7467880","url":null,"abstract":"In this work, a Sawyer-Tower circuit is employed to characterize the output capacitance (COSS) of advanced superjunction MOSFETs. It is shown that some of the most advanced superjunction MOSFETs exhibit significant hysteresis in their output capacitance which leads to unrecoverable power loss. This work shows that the conventional impedance analyzer method can only measure COSS accurately when hysteresis is not present while measurement of COSS with a Sawyer-Tower circuit gives accurate results regardless of whether hysteresis is present or not. Accurate measurement of COSS with a Sawyer-Tower circuit not only enables designers to more accurately calculate and predict power loss but even more importantly allows the power semiconductor industry to more effectively advance future generations of superjunction MOSFETs for optimum efficiency, especially for use in resonant converter applications.","PeriodicalId":143091,"journal":{"name":"2016 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130063600","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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