{"title":"Design of a High-Performance DC Power Cycling Test Setup for SiC MOSFETs","authors":"Fei Yang, Enes Ugur, Shi Pu, B. Akin","doi":"10.1109/APEC.2019.8721974","DOIUrl":"https://doi.org/10.1109/APEC.2019.8721974","url":null,"abstract":"In this paper, a high-performance DC power cycling setup dedicated for SiC power MOSFETs is presented. Different from the previous DC power cycling setup designs focusing on circuit topology and operation principle, this paper discusses the detailed design considerations to ensure the measurement accuracy and control the voltage spikes within the safe voltage range of the data acquisition (DAQ) equipment. Specifically, the transient behavior of the circuit is analyzed, and a simulation model is built in LTspice to facilitate the design. From the simulation result, it is observed that the gate timing control is critical to limit the measurement spikes. In addition, adding decoupling capacitors helps to attenuate the ringing noise in the voltage measurement. A prototype is built, and the experimental results indicate that a precise measurement can be realized with the proposed DC power cycling setup under various conditions.","PeriodicalId":142409,"journal":{"name":"2019 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121446906","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}
Antreas Naziris, Galo Guarderas, A. Francés, R. Asensi, J. Uceda
{"title":"Large-Signal Black-Box Modelling of Bidirectional Battery Charger for Electric Vehicles","authors":"Antreas Naziris, Galo Guarderas, A. Francés, R. Asensi, J. Uceda","doi":"10.1109/APEC.2019.8721930","DOIUrl":"https://doi.org/10.1109/APEC.2019.8721930","url":null,"abstract":"This paper introduces a new approach of black-box modelling of bidirectional battery chargers for Electric Vehicles (EV). Due to the increasing penetration of EV, the number of battery chargers connected to the grid is also increasing, being a challenge to assess the impact of such growing number of battery chargers into the grid performance. The black-box model is able to represent the behavior of the battery charger using the information generated from a number of tests applied to the equipment to be modeled. Due to the variability of the operating conditions a large-signal modelling strategy based on the polytopic structure is proposed. This modelling strategy will be tested with an actual commercial bidirectional battery charger. The experimental tests of the paper illustrate the Grid to Vehicle (G2V) and Vehicle to Grid (V2G) operations.","PeriodicalId":142409,"journal":{"name":"2019 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129266434","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}
Mostak Mohammad, J. Pries, O. Onar, V. Galigekere, G. Su, Saeed Anwar, Jonathan Wilkins, Utkarsh D. Kavimandan, Devendra Patil
{"title":"Design of an EMF Suppressing Magnetic Shield for a 100-kW DD-Coil Wireless Charging System for Electric Vehicles","authors":"Mostak Mohammad, J. Pries, O. Onar, V. Galigekere, G. Su, Saeed Anwar, Jonathan Wilkins, Utkarsh D. Kavimandan, Devendra Patil","doi":"10.1109/APEC.2019.8722084","DOIUrl":"https://doi.org/10.1109/APEC.2019.8722084","url":null,"abstract":"This study investigates the electromagnetic field (EMF) emissions of a 100-kW Double-D (DD) wireless charging system (WCS). A shielding technique is proposed to suppress the magnetic field emissions below the limits set by the International Commission on Non-Ionizing Radiation Protection (ICNIRP). The leakage pattern produced by the DD coil is different than unipolar (circular, rectangular, etc.) pads and traditional eddy current based aluminum shields are not effective at suppressing this leakage field. Therefore, a methodically designed magnetic shield could be more effective. This study proposes a shielding technique for DD coils using a combination of aluminum shielding and a low reluctance magnetic shield to suppress the magnetic field emissions. The shielding effectiveness is evaluated through finite element analysis (FEA) models and tested experimentally. The effectiveness of the proposed magnetic shielding and the limits of the conventional aluminum shielding are studied. A prototype 11-kW DD coil wireless charging system is used to experimentally validate the proposed shielding technique. The experimental results show that the aluminum shield increases the emissions of DD coils by 25% and the proposed magnetic shield can be employed to suppress the emission by 60%.","PeriodicalId":142409,"journal":{"name":"2019 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117078339","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}
R. Alizadeh, Tyler Adamson, J. Balda, Yue Zhao, M. Asheghi, K. Goodson
{"title":"A Compact 50-kW Traction Inverter Design Using Off-the-Shelf Components","authors":"R. Alizadeh, Tyler Adamson, J. Balda, Yue Zhao, M. Asheghi, K. Goodson","doi":"10.1109/APEC.2019.8722201","DOIUrl":"https://doi.org/10.1109/APEC.2019.8722201","url":null,"abstract":"The requirements on volumetric density of power electronic converters in electric vehicles are increasing, since more space is needed for electronic systems and passenger capacity. The U.S. Department of Energy (DOE) has set the 2020 target for vehicular power electronic systems as 13.4 kW/l. Achieving high power density using commercial off-the-shelf (COTS) parts is challenging because these components have various form factors leading to unused spaces, as well as cooling and airflow issues. In this work, a high-power-density traction inverter, rated at 50-kW with the peak power at 74-kW, is designed and built using all COTS components. The system is tested under resistive-inductive loads and a dynamometer-based driving schedule. A power density of 13.64 kW/l was accomplished and possibilities for volume reduction to achieve 25 kW/l are evaluated revealing the challenges to achieve even higher power densities using COTS technologies.","PeriodicalId":142409,"journal":{"name":"2019 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127017333","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}
{"title":"Optimization of the Modulation Sequence and Proposing an Overlap Technique for Current Source Inverter","authors":"Mahmoud Gaber, O. Abdel-Rahim, M. Orabi","doi":"10.1109/APEC.2019.8722210","DOIUrl":"https://doi.org/10.1109/APEC.2019.8722210","url":null,"abstract":"Usually, power converters are used to deliver renewable energy to the grid. The operation of these converters greatly impacts the power quality and reliability of the power system. Hence, more attention should be paid to the performance of such power electronic systems. Being one of these converters, current source inverter (CSI) operation is influenced by the overlap period (OLP) that is included in its pulse-train to prevent voltage spikes. The OLP results in waveform distortions and vector deviation error. This study proposes an overlap technique and optimizes the modulation sequence that reduced the effect of OLP remarkably. The ampere-second analysis of the dwell times of the modulation vectors is provided, the resulted error expressions are derived. Hardware prototype is being implemented in the lab and a sample of the results are provided.","PeriodicalId":142409,"journal":{"name":"2019 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126692296","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}
{"title":"Active gate control for series connected SiC MOSFETs","authors":"Inhwan Lee, Xiu Yao","doi":"10.1109/APEC.2019.8722292","DOIUrl":"https://doi.org/10.1109/APEC.2019.8722292","url":null,"abstract":"Silicon (Si) is the most widely used in power electronic devices. However, due to its limitations regarding switching frequency and blocking voltage, wide band gap (WBG) materials have been under extensive research. Especially, Silicon carbide (SiC) device is expected to replace the Si device in many high voltage/power application. However, the commercially available SiC devices need to be improved to achieve higher voltage rating. To achieve high voltage and power, series connection of devices is promising alternative. Despite of the advantage of series connection, it causes critical issue which is voltage unbalance that harms the devices. Therefore, the voltage balancing control must be performed in devices series connection. In this paper, the active gate driver (AGD) control method is proposed to balance the voltages. A gate resistance modulation method is applied for dynamic voltage sharing. The proposed method is verified in LTspice siumlation.","PeriodicalId":142409,"journal":{"name":"2019 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125232994","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}
Qirong Peng, Debashis Mandal, Parisa Mahmoudidaryan, B. Bakkaloglu, S. Kiaei
{"title":"Integrated High-Efficiency Single-Inductor CCM Boost Converter for Multi-Junction PV Energy Harvesting","authors":"Qirong Peng, Debashis Mandal, Parisa Mahmoudidaryan, B. Bakkaloglu, S. Kiaei","doi":"10.1109/APEC.2019.8722258","DOIUrl":"https://doi.org/10.1109/APEC.2019.8722258","url":null,"abstract":"This paper presents a dual-input, single inductor boost converter operating in continuous conduction mode (CCM) for multi-junction photovoltaic (PV) energy harvesting. The proposed inductor current regulation and inductor time-sharing scheme reduces the cross-regulation between the inputs caused by sharing the CCM converter between multi-junction PV (MJ-PV) sources. The existing hill-climbing maximum power point tracking (MPPT) algorithm is modified for MJ-PV sources to ensure the maximum power point (MPP) operation of both PV sources. A dual-path architecture using hysteresis control is implemented to provide a regulated output voltage. The power switches and control circuits are designed and fabricated in standard 0.18-µm CMOS technology. Measured results show that the proposed converter achieves peak power efficiency of 85%.","PeriodicalId":142409,"journal":{"name":"2019 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122918440","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}
{"title":"Impact of Threshold Voltage Instability on Static and Switching Performance of GaN Devices with p-GaN Gate","authors":"Fei Yang, Chi Xu, B. Akin","doi":"10.1109/APEC.2019.8722163","DOIUrl":"https://doi.org/10.1109/APEC.2019.8722163","url":null,"abstract":"The p-GaN gate technology has been adopted to realize enhancement-mode GaN devices. However, the blocking voltage can cause the threshold voltage to drift in p-GaN devices In this paper, the impact of the threshold voltage instability on the static and switching performance of the p-GaN device is studied. Specifically, a Vth measurement circuit is first designed which is able to characterize the threshold voltage after applying a minimum high voltage pulse of 2 μs. From the experimental result, an increase of more than 0.7 V in Vth is observed within several μs after blocking the high voltage. The static characteristics of the same device are compared before and after blocking the high voltage, and a reduced knee point in the output characteristic is observed at a low gate-to-source voltage. Due to the static characteristic variation, the switching performance of the device is also changed after stressed with the high drain-to-source voltage. Specifically, from the double pulse test result at 400 V/25 A with Rg =20 Ω, more than 20% increase of turn-on loss is recognized after blocking the high voltage for 30 minutes. The turn on loss difference is minimized when the gate resistance value is reduced to 0 Ω. For the turn-off loss, the impact of Vth’s shift is negligible. Detailed analysis is also provided to explain the experimental result. It is concluded that higher gate drive voltage and lower gate resistance helps to minimize the threshold voltage instability’s effect on the device’s performance.","PeriodicalId":142409,"journal":{"name":"2019 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120871987","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}
Bin Yu, Wensheng Song, T. Tang, Song Wang, Ping Yang
{"title":"A Finite Control Set Model Predictive Current Control Scheme for Five-phase PMSMs Based on Optimized Duty Ratio","authors":"Bin Yu, Wensheng Song, T. Tang, Song Wang, Ping Yang","doi":"10.1109/APEC.2019.8722032","DOIUrl":"https://doi.org/10.1109/APEC.2019.8722032","url":null,"abstract":"Finite control set model predictive current control (FCS-MPCC) scheme is easy to realize and has fast dynamic response, so it’s widely employed in machine drive applications. However, the low-order harmonics in stator currents, heavy computation burden and the utilization improvement of dc-link voltage are the key issues of FCS-MPCC schemes for multiphase machine drives. Thus, this paper proposes a FCS-MPCC scheme with the optimized duty ratio (MPCC-ODR) for five-phase machine drives. Simulations and experimental results have verified that the proposed MPCC-ODR scheme can suppress low-order harmonics, improve the utilization of dc-link voltage and reduce computation complexity.","PeriodicalId":142409,"journal":{"name":"2019 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127092086","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}
Bodong Li, Lei Jing, Xiaoqing Wang, N. Chen, Bo Liu, Min Chen
{"title":"A Smooth Mode-Switching Strategy for Bidirectional OBC Base on V2G Technology","authors":"Bodong Li, Lei Jing, Xiaoqing Wang, N. Chen, Bo Liu, Min Chen","doi":"10.1109/APEC.2019.8721774","DOIUrl":"https://doi.org/10.1109/APEC.2019.8721774","url":null,"abstract":"Vehicle to grid (V2G) technology uses electric vehicles (EVs) as energy storage devices for the power grid along with peak cutting and grain filling function. The bidirectional converter plays an essential part in V2G technology since it allows energy to flow in both directions based on the grid dispatching signal. However, in two-stage bidirectional on-board-charge (OBC) with CLLC circuit, traditional frequency conversion control can not achieve smooth mode-switching, so that the OBC can not response to the power grid dispatching signal quickly. In this paper, a control strategy combining frequency conversion control and phase-shifting control is proposed, which can realize smooth mode-switching of CLLC circuit. The control strategy is validated by a 3kW two-stage OBC prototype integrating Totem-pole and CLLC circuit.","PeriodicalId":142409,"journal":{"name":"2019 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133725676","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}