Pub Date : 2017-03-26DOI: 10.1109/APEC.2017.7931226
T. Beechner, A. Carpenter
This paper presents a high-efficiency, high-speed variable frequency drive (VFD) used in an electrically-assisted turbocharging application with the goal of reducing turbo lag and extracting electrical energy during vehicle braking and deceleration events. To maximize switching frequency and achieve high-temperature operation, SiC MOSFETs are used in lieu of Si IGBTs or MOSFETs. Furthermore, the VFD is cooled using the existing engine coolant loop, which operates near 105 deg. C. Eliminating the need for an additional 65 deg. C liquid cooling loop, which are typical of electric vehicles, significantly reducing system complexity, volume, and weight and simplifying integration. A digital sliding-mode-observer (SMO) was developed to drive the machine at a ramp rate of over 68 kRPM/sec. A dead-time compensation algorithm based upon adaptive notch filters was used to eliminate low-order current harmonics, which can degrade the sensorless control algorithm's performance. Experimental results are presented confirming the VFD's efficiency, dynamic control performance, low-THD load current, and high-temperature operation. Lastly, using a previously developed electro-thermal model, the VFD is extended to higher voltage (450 Vac) motors for application in future vehicle traction drives. The results show that the presented drive exceeds the Department of Energy's targets for traction drives in 2020.
{"title":"A >98% efficient >150 kRPM high-temperature liquid-cooled SiC VFD for hybrid-electric turbochargers","authors":"T. Beechner, A. Carpenter","doi":"10.1109/APEC.2017.7931226","DOIUrl":"https://doi.org/10.1109/APEC.2017.7931226","url":null,"abstract":"This paper presents a high-efficiency, high-speed variable frequency drive (VFD) used in an electrically-assisted turbocharging application with the goal of reducing turbo lag and extracting electrical energy during vehicle braking and deceleration events. To maximize switching frequency and achieve high-temperature operation, SiC MOSFETs are used in lieu of Si IGBTs or MOSFETs. Furthermore, the VFD is cooled using the existing engine coolant loop, which operates near 105 deg. C. Eliminating the need for an additional 65 deg. C liquid cooling loop, which are typical of electric vehicles, significantly reducing system complexity, volume, and weight and simplifying integration. A digital sliding-mode-observer (SMO) was developed to drive the machine at a ramp rate of over 68 kRPM/sec. A dead-time compensation algorithm based upon adaptive notch filters was used to eliminate low-order current harmonics, which can degrade the sensorless control algorithm's performance. Experimental results are presented confirming the VFD's efficiency, dynamic control performance, low-THD load current, and high-temperature operation. Lastly, using a previously developed electro-thermal model, the VFD is extended to higher voltage (450 Vac) motors for application in future vehicle traction drives. The results show that the presented drive exceeds the Department of Energy's targets for traction drives in 2020.","PeriodicalId":201289,"journal":{"name":"2017 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"2004 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116897949","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 : 2017-03-26DOI: 10.1109/APEC.2017.7931221
Janosch Marquait, Falk Kyburz, C. Mathis, K. Schenk
The design method and optimization of a 22 kW inductive charging system (ICS) for a ground clearance range of 100 mm to 250 mm, a lateral misalignment of ±75 mm in driving direction and ±150 mm transverse to it, is described. The influence on the inductance values as well as the coupling coefficient of the coupler geometry is analyzed using state of the art finite element analysis (FEA) simulation. Additionally, mathematical analysis shows the behavior of the system for different misalignment situations and component tolerances. A fully functional prototype verifies the behavior of the FEA simulation results, the mathematical models and the electrical simulations and demonstrates a DC to DC efficiency of up to 95%.
{"title":"FEA assisted design and optimization for a highly efficient 22 kW inductive charging system for electric vehicles with large air gap and output voltage variation","authors":"Janosch Marquait, Falk Kyburz, C. Mathis, K. Schenk","doi":"10.1109/APEC.2017.7931221","DOIUrl":"https://doi.org/10.1109/APEC.2017.7931221","url":null,"abstract":"The design method and optimization of a 22 kW inductive charging system (ICS) for a ground clearance range of 100 mm to 250 mm, a lateral misalignment of ±75 mm in driving direction and ±150 mm transverse to it, is described. The influence on the inductance values as well as the coupling coefficient of the coupler geometry is analyzed using state of the art finite element analysis (FEA) simulation. Additionally, mathematical analysis shows the behavior of the system for different misalignment situations and component tolerances. A fully functional prototype verifies the behavior of the FEA simulation results, the mathematical models and the electrical simulations and demonstrates a DC to DC efficiency of up to 95%.","PeriodicalId":201289,"journal":{"name":"2017 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126043448","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 : 2017-03-26DOI: 10.1109/APEC.2017.7930751
N. Torabi, V. M. Sundaram, H. Toliyat
In this paper, a robust fault diagnosis strategy for open switch faults isolation in multiphase drives using machine learning techniques is designed. An adaptive self-recurrent wavelet neural network as a nonlinear system identifier provides estimate of a nonlinear model to generate appropriate fault symptoms based on the gate signals and actual motor currents. The significant contribution of this work is combining component-based and system-based fault diagnosis methods. A component-based signal is defined as the input of the identifier, while a system-based signal is used as the output. Advantage of the proposed method is the ability of detecting inverter faults in less than one millisecond without deploying extra hardware. This method is applicable in current controlled, speed controlled, and speed sensorless systems. The fault detection scenario is followed by a classifier to locate the fault. Discriminant Analysis and Support Vector Machines have been implemented to identify the fault location. The evaluations are supported by a laboratory setup.
{"title":"On-line fault diagnosis of multi-phase drives using self-recurrent wavelet neural networks with adaptive learning rates","authors":"N. Torabi, V. M. Sundaram, H. Toliyat","doi":"10.1109/APEC.2017.7930751","DOIUrl":"https://doi.org/10.1109/APEC.2017.7930751","url":null,"abstract":"In this paper, a robust fault diagnosis strategy for open switch faults isolation in multiphase drives using machine learning techniques is designed. An adaptive self-recurrent wavelet neural network as a nonlinear system identifier provides estimate of a nonlinear model to generate appropriate fault symptoms based on the gate signals and actual motor currents. The significant contribution of this work is combining component-based and system-based fault diagnosis methods. A component-based signal is defined as the input of the identifier, while a system-based signal is used as the output. Advantage of the proposed method is the ability of detecting inverter faults in less than one millisecond without deploying extra hardware. This method is applicable in current controlled, speed controlled, and speed sensorless systems. The fault detection scenario is followed by a classifier to locate the fault. Discriminant Analysis and Support Vector Machines have been implemented to identify the fault location. The evaluations are supported by a laboratory setup.","PeriodicalId":201289,"journal":{"name":"2017 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126740662","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 : 2017-03-26DOI: 10.1109/APEC.2017.7930842
Renke Han, N. L. Diaz Aldana, L. Meng, J. Guerrero, Qiuye Sun
A novel nonlinear droop-free distributed controller is proposed to achieve accurate current sharing and eliminate voltage drops in dc Micro-Grid (MG). Then by introducing the sample and holding scheme, the proposed controller is extended to the event-triggered-based controller which is designed based on the Lyapunov approach to guarantee the global stability and convergence instead of localized stability. Meanwhile, the event-triggered-based controller can considerably reduce the communication traffic and significantly relax the requirement for precise real-time information transmission without sacrificing system performance. An experimental setup is built to validate the effectiveness of the proposed controller by comparing with different controllers and communication strategies.
{"title":"Droop-free distributed control with event-triggered communication in DC micro-grid","authors":"Renke Han, N. L. Diaz Aldana, L. Meng, J. Guerrero, Qiuye Sun","doi":"10.1109/APEC.2017.7930842","DOIUrl":"https://doi.org/10.1109/APEC.2017.7930842","url":null,"abstract":"A novel nonlinear droop-free distributed controller is proposed to achieve accurate current sharing and eliminate voltage drops in dc Micro-Grid (MG). Then by introducing the sample and holding scheme, the proposed controller is extended to the event-triggered-based controller which is designed based on the Lyapunov approach to guarantee the global stability and convergence instead of localized stability. Meanwhile, the event-triggered-based controller can considerably reduce the communication traffic and significantly relax the requirement for precise real-time information transmission without sacrificing system performance. An experimental setup is built to validate the effectiveness of the proposed controller by comparing with different controllers and communication strategies.","PeriodicalId":201289,"journal":{"name":"2017 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131247437","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 : 2017-03-26DOI: 10.1109/APEC.2017.7930789
J. Stewart, J. Neely, J. Delhotal, J. Flicker
Advancements in IGBT device performance and reliability have been important for widespread electric vehicle (EV) and hybrid electric vehicle (HEV) adoption. However, further improvements in device performance are now limited by silicon's (Si) inherent material characteristics. New improvements are being realized in converter efficiency and power density with wide bandgap materials, such as silicon-carbide (SiC) and gallium nitride (GaN), which permit faster switching frequencies and higher temperature operation. On the horizon are ultra-wide bandgap materials such as aluminum nitride (AlN) and aluminum gallium nitride (AlGaN) which hold the potential to push the envelope further. As device operating temperatures and switching frequencies increase, however, the balance of the power conversion system becomes more important: DC bus design, filter components and thermal management. This paper considers a typical 6-puIse inverter application common in EV and HEV power systems and provides an alternative, cost-effective solution to the design of a low-impedance DC bus. In contrast to systems that use bus bars with film or electrolytic dc link capacitors, the proposed high-frequency (HF) bus design reduces parasitic resistance and inductance, tolerates higher temperature and is potentially scalable to MHz frequencies. A prototype was built and compared in simulation to the DC bus design documented for the 2010 Toyota Prius.
{"title":"DC link bus design for high frequency, high temperature converters","authors":"J. Stewart, J. Neely, J. Delhotal, J. Flicker","doi":"10.1109/APEC.2017.7930789","DOIUrl":"https://doi.org/10.1109/APEC.2017.7930789","url":null,"abstract":"Advancements in IGBT device performance and reliability have been important for widespread electric vehicle (EV) and hybrid electric vehicle (HEV) adoption. However, further improvements in device performance are now limited by silicon's (Si) inherent material characteristics. New improvements are being realized in converter efficiency and power density with wide bandgap materials, such as silicon-carbide (SiC) and gallium nitride (GaN), which permit faster switching frequencies and higher temperature operation. On the horizon are ultra-wide bandgap materials such as aluminum nitride (AlN) and aluminum gallium nitride (AlGaN) which hold the potential to push the envelope further. As device operating temperatures and switching frequencies increase, however, the balance of the power conversion system becomes more important: DC bus design, filter components and thermal management. This paper considers a typical 6-puIse inverter application common in EV and HEV power systems and provides an alternative, cost-effective solution to the design of a low-impedance DC bus. In contrast to systems that use bus bars with film or electrolytic dc link capacitors, the proposed high-frequency (HF) bus design reduces parasitic resistance and inductance, tolerates higher temperature and is potentially scalable to MHz frequencies. A prototype was built and compared in simulation to the DC bus design documented for the 2010 Toyota Prius.","PeriodicalId":201289,"journal":{"name":"2017 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132424277","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 : 2017-03-26DOI: 10.1109/APEC.2017.7930920
Yunlong Shang, N. Cui, Qi Zhang, Chenghui Zhang
For the conventional switched capacitor converter (SCC) based equalizers, it is difficult to achieve the full equalization among cells due to the inevitable voltage fall across MOSFET switches. Particularly, when the voltage gap among cells is larger, the balancing efficiency is lower, but the balancing speed gets slower as the voltage gap gets smaller. In order to soften these downsides, this paper proposes a battery equalization topology with zero-current switching (ZCS) and zero-voltage gap (ZVG) among cells based on three-resonant-state SCCs. An additional resonant path is built to release the charge of the capacitor into the inductor in each cycle, which lays the foundations to obtain ZVG among cells, improves the balancing efficiency at a large voltage gap, and increases the balancing speed at a small voltage gap. A four-lithium-ion-cell prototype is applied to validate the theoretical analysis. Experiment results show the proposed topology demonstrates good balancing performance with ZCS and ZVG among cells.
{"title":"A battery equalizer with zero-current switching and zero-voltage gap among cells based on three-resonant-state LC converters","authors":"Yunlong Shang, N. Cui, Qi Zhang, Chenghui Zhang","doi":"10.1109/APEC.2017.7930920","DOIUrl":"https://doi.org/10.1109/APEC.2017.7930920","url":null,"abstract":"For the conventional switched capacitor converter (SCC) based equalizers, it is difficult to achieve the full equalization among cells due to the inevitable voltage fall across MOSFET switches. Particularly, when the voltage gap among cells is larger, the balancing efficiency is lower, but the balancing speed gets slower as the voltage gap gets smaller. In order to soften these downsides, this paper proposes a battery equalization topology with zero-current switching (ZCS) and zero-voltage gap (ZVG) among cells based on three-resonant-state SCCs. An additional resonant path is built to release the charge of the capacitor into the inductor in each cycle, which lays the foundations to obtain ZVG among cells, improves the balancing efficiency at a large voltage gap, and increases the balancing speed at a small voltage gap. A four-lithium-ion-cell prototype is applied to validate the theoretical analysis. Experiment results show the proposed topology demonstrates good balancing performance with ZCS and ZVG among cells.","PeriodicalId":201289,"journal":{"name":"2017 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129762645","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 : 2017-03-26DOI: 10.1109/APEC.2017.7930935
Simon Nigsch, M. Schlenk, K. Schenk
Current-doubler rectifiers are well-known in conjunction with double ended buck-derived isolated converters. One major purpose for its implementation is the reduction of power losses in the transformer secondary winding. The topic of this paper is an extension to this approach and presents a detailed analysis of a current-doubler rectifier used in an LLC resonant converter. The analysis uses the first harmonic approximation (FHA) approach, which tremendously simplifies the system model, leading to a linear circuit. The design constraints are worked out, such that the converter behavior remains unaltered by adding the current-doubler. By using this type of rectifier, the LLC efficiency can be improved over a traditional approach with a center tapped secondary winding. The secondary side power losses are reduced significantly and the drawback of an unequal coupling between the primary and either one of the two secondary windings is eliminated. Measurements on a prototype verify the analytical and simulation results.
{"title":"Detailed analysis of a current-doubler rectifier for an LLC resonant converter with high output current","authors":"Simon Nigsch, M. Schlenk, K. Schenk","doi":"10.1109/APEC.2017.7930935","DOIUrl":"https://doi.org/10.1109/APEC.2017.7930935","url":null,"abstract":"Current-doubler rectifiers are well-known in conjunction with double ended buck-derived isolated converters. One major purpose for its implementation is the reduction of power losses in the transformer secondary winding. The topic of this paper is an extension to this approach and presents a detailed analysis of a current-doubler rectifier used in an LLC resonant converter. The analysis uses the first harmonic approximation (FHA) approach, which tremendously simplifies the system model, leading to a linear circuit. The design constraints are worked out, such that the converter behavior remains unaltered by adding the current-doubler. By using this type of rectifier, the LLC efficiency can be improved over a traditional approach with a center tapped secondary winding. The secondary side power losses are reduced significantly and the drawback of an unequal coupling between the primary and either one of the two secondary windings is eliminated. Measurements on a prototype verify the analytical and simulation results.","PeriodicalId":201289,"journal":{"name":"2017 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116924314","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 : 2017-03-26DOI: 10.1109/APEC.2017.7931108
Shishuo Zhao, Qiang Li, F. Lee
The paper presents a high frequency modular medium voltage AC (4160 VAC and 13.8 VAC) to low voltage DC (400 VDC) power conditioning system block (PCSB) that are scalable so that they can be used for micro grids of different scale (several-hundred kW to multi-MW). The modular approach is intended to result in higher-volume, lower-cost, less-loss power electronics building blocks that service many applications, such as DC data center and electric vehicle charge station. In this paper, a 225kW, 500 kHz PCSB is demonstrated to direct converter 4160 VAC to 400V DC for a DC date center. WBG power devices and CLLC resonant converter are used to minimize switching related loss at high frequency. The high frequency transformer of CLLC resonant converter is one of the key elements for the proposed modular approach. This paper will focus on high frequency transformer design to realize high-voltage-isolation, high-efficiency and high-density at the same time. Based on a split winding transformer structure, transformer insulation material and dimension parameters are determined referring to insulation standard. Transformer magnetic loss model is reviewed based on which loss design trade-off is carefully analyzed. Finally a 500 kHz transformer prototype has been developed and demonstrated with 30kV isolation capability, whole CLLC resonant converter holds 98% peak efficiency and 48 W/in3 power density.
{"title":"High frequency transformer design for modular power conversion from medium voltage AC to 400V DC","authors":"Shishuo Zhao, Qiang Li, F. Lee","doi":"10.1109/APEC.2017.7931108","DOIUrl":"https://doi.org/10.1109/APEC.2017.7931108","url":null,"abstract":"The paper presents a high frequency modular medium voltage AC (4160 VAC and 13.8 VAC) to low voltage DC (400 VDC) power conditioning system block (PCSB) that are scalable so that they can be used for micro grids of different scale (several-hundred kW to multi-MW). The modular approach is intended to result in higher-volume, lower-cost, less-loss power electronics building blocks that service many applications, such as DC data center and electric vehicle charge station. In this paper, a 225kW, 500 kHz PCSB is demonstrated to direct converter 4160 VAC to 400V DC for a DC date center. WBG power devices and CLLC resonant converter are used to minimize switching related loss at high frequency. The high frequency transformer of CLLC resonant converter is one of the key elements for the proposed modular approach. This paper will focus on high frequency transformer design to realize high-voltage-isolation, high-efficiency and high-density at the same time. Based on a split winding transformer structure, transformer insulation material and dimension parameters are determined referring to insulation standard. Transformer magnetic loss model is reviewed based on which loss design trade-off is carefully analyzed. Finally a 500 kHz transformer prototype has been developed and demonstrated with 30kV isolation capability, whole CLLC resonant converter holds 98% peak efficiency and 48 W/in3 power density.","PeriodicalId":201289,"journal":{"name":"2017 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"2019 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114238750","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 : 2017-03-26DOI: 10.1109/APEC.2017.7930721
Xiaoqiang Guo, Ran He
The leakage current reduction is one of the most important issues for transformerless PV systems. The conventional Z-source three-phase PV inverter failed to suppress the leakage current in an effective way. In order to solve the problem, a new modulation strategy for the Z-Source four-leg transformerless PV inverter is proposed in this paper. The common mode loop model presented firstly. And then the common mode voltage behavior and the effect of factors on the leakage current are discussed. A new modulation strategy is proposed to achieve the constant common mode voltage. Therefore, the leakage current can be suppressed effectively. Finally, the proposed strategy is tested, and the results verify the effectiveness of the proposed solution.
{"title":"Leakage current reduction of Z-source four-leg inverter for transformerless pvsystem","authors":"Xiaoqiang Guo, Ran He","doi":"10.1109/APEC.2017.7930721","DOIUrl":"https://doi.org/10.1109/APEC.2017.7930721","url":null,"abstract":"The leakage current reduction is one of the most important issues for transformerless PV systems. The conventional Z-source three-phase PV inverter failed to suppress the leakage current in an effective way. In order to solve the problem, a new modulation strategy for the Z-Source four-leg transformerless PV inverter is proposed in this paper. The common mode loop model presented firstly. And then the common mode voltage behavior and the effect of factors on the leakage current are discussed. A new modulation strategy is proposed to achieve the constant common mode voltage. Therefore, the leakage current can be suppressed effectively. Finally, the proposed strategy is tested, and the results verify the effectiveness of the proposed solution.","PeriodicalId":201289,"journal":{"name":"2017 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117061363","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 : 2017-03-26DOI: 10.1109/APEC.2017.7931082
H. Long, M. Sweet, E. Narayanan, Gangru Li
The IGBT press-pack provides low inductance and simple module stack for high power and high voltage applications. In this work, the reliability of IGBT Press-Pack power modules is experimentally tested under RBSOA conditions to investigate their limitation and current scalability. The internal current distribution is analyzed by detailed 3D FEM simulation. This work reveals that the uneven distribution of current density is caused by different impedance in each IGBT die current conducting path, due to skin and proximity effects during switching transient. Stray and mutual inductances also affect current paths depending upon the location of IGBT within the package. The unbalanced switching times become larger as the package size increases with more parallel configured IGBTs. By extracting the FEM data into the proposed circuit model, the electrical performance will be discussed in detail.
{"title":"Reliability study and modelling of IGBT press-pack power modules","authors":"H. Long, M. Sweet, E. Narayanan, Gangru Li","doi":"10.1109/APEC.2017.7931082","DOIUrl":"https://doi.org/10.1109/APEC.2017.7931082","url":null,"abstract":"The IGBT press-pack provides low inductance and simple module stack for high power and high voltage applications. In this work, the reliability of IGBT Press-Pack power modules is experimentally tested under RBSOA conditions to investigate their limitation and current scalability. The internal current distribution is analyzed by detailed 3D FEM simulation. This work reveals that the uneven distribution of current density is caused by different impedance in each IGBT die current conducting path, due to skin and proximity effects during switching transient. Stray and mutual inductances also affect current paths depending upon the location of IGBT within the package. The unbalanced switching times become larger as the package size increases with more parallel configured IGBTs. By extracting the FEM data into the proposed circuit model, the electrical performance will be discussed in detail.","PeriodicalId":201289,"journal":{"name":"2017 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"232 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115099550","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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