W. Khan, Armin Ebrahimian, S. I. Hosseini S., N. Weise
{"title":"Design of High Current, High Power Density GaN Based Motor Drive for All Electric Aircraft Application","authors":"W. Khan, Armin Ebrahimian, S. I. Hosseini S., N. Weise","doi":"10.1109/WiPDA56483.2022.9955273","DOIUrl":"https://doi.org/10.1109/WiPDA56483.2022.9955273","url":null,"abstract":"The past decade has seen noticeable advancements in the miniaturization of wide-band gap semiconductor technology making it feasible to be applied in demanding applications such as more-electric-aircrafts (MEA). Multiple high speed electric motors operating in parallel with current ratings in hundreds of amps are required to match the power delivery capability of conventional jet engines. As a result, the power electronics driving the motors require special attention to parallel multiple active switches in order to meet the high current requirements. This paper presents the design of an axially stator mounted 250 kW integrated modular motor drive for MEA applications. The design considerations presented include optimal component placement and layer stackup to minimize voltage overshoots during switch commutation, optimal gate drive layout to synchronize the current sharing of multiple GaN active switches, and the selection process of the on-board current sensor. Lastly, experimental test results are presented that verify the efficacy of the proposed design.","PeriodicalId":410411,"journal":{"name":"2022 IEEE 9th Workshop on Wide Bandgap Power Devices & Applications (WiPDA)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125403292","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}
Ali Parsa Sirat, Chondon Roy, Daniel Evans, J. Gafford, B. Parkhideh
{"title":"In-Situ Ultrafast Sensing Techniques for Prognostics and Protection of SiC Devices","authors":"Ali Parsa Sirat, Chondon Roy, Daniel Evans, J. Gafford, B. Parkhideh","doi":"10.1109/WiPDA56483.2022.9955254","DOIUrl":"https://doi.org/10.1109/WiPDA56483.2022.9955254","url":null,"abstract":"Embedding diagnostic and prognostic into power electronics has the potential to increase the reliability and resiliency of and increasing automated adaptability in variable operating conditions has increased the reliability and resiliency of these systems, especially with the transition to wide bandgap semiconductors where higher voltages, lower on-state resistances, and faster switching speed can lead to rapid failures under conditions such as shoot through. This value proposition requires minimally invasive sensing elements that provide real-time monitoring of online system operations such that parasitic values are not introduced, which erode performance. Presented is an insitu current sensing circuit with integration to the controller to provide enhanced operational capabilities such as sub-microsecond short circuit protection and power semiconductor device on-state resistance measurement. Techniques developed for measurement and protection are not limited to the tested SiC devices and may be extended to numerous types of critical components. These techniques can provide detailed, real-time state of health estimation for critical components and system capabilities, thus, enhancing system reliability.","PeriodicalId":410411,"journal":{"name":"2022 IEEE 9th Workshop on Wide Bandgap Power Devices & Applications (WiPDA)","volume":"438 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132721156","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":"Short Circuit Fault Induced Failure of SiC MOSFETs in DC Solid-State Circuit Breakers","authors":"Shuyan Zhao, R. Kheirollahi, Hua Zhang, F. Lu","doi":"10.1109/WiPDA56483.2022.9955271","DOIUrl":"https://doi.org/10.1109/WiPDA56483.2022.9955271","url":null,"abstract":"This paper investigates the failure modes of SiC MOSFETs-based passive voltage clamping dc solid-state circuit breakers (SSCBs). There are two major concerns of main SiC switch failure that are analyzed in this paper: 1) gate-source voltage ringing related switch degradation/failure when cutting off heavy fault current with high di/dt. 2) thermal runaway directly caused by the short circuit surge current in the main switch before the cut-off and transient power strike during cutoff. Two 10A/86A dc interruption experiments are conducted to demonstrate the failure caused by gate ringing due to the high di/dt issue coupled with unavoidable parasitic common source impedance of the device package. The thermal runaway failure due to the short circuit current surge and transient turn-off power strike is also demonstrated by a 631A dc interruption test. At last, an active commutation current injection scheme is discussed as future research trends to address the revealed gate ringing and cut-off power strike issues in SSCBs.","PeriodicalId":410411,"journal":{"name":"2022 IEEE 9th Workshop on Wide Bandgap Power Devices & Applications (WiPDA)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130640171","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":"Area-Efficient High-Voltage (HV) Lateral MOSFETs for Discrete Device Development and Power IC Integration","authors":"S. Isukapati, Seung Yup Jang, Woongje Sung","doi":"10.1109/WiPDA56483.2022.9955284","DOIUrl":"https://doi.org/10.1109/WiPDA56483.2022.9955284","url":null,"abstract":"This paper reports the design of area-efficient high voltage lateral MOSFETs for discrete device development and also for integration in power IC development. Utilizing the three metal layered back-end-of-the-line (BEOL) process, the footprint of the devices has been significantly reduced without any deviation from the static electrical performances. The reported devices were fabricated on a six-inch N epi/P epi/ 4H-SiC N+ substrate. The reported HV lateral devices are the best in class with superior breakdown voltage (BV) - specific on-resistance (Ron,sp) trade-off. The devices demonstrated a BV of 430V at drain-source current (Ids) of 1mA and a Ron,sp,active of 6.2 mΩ⸱cm2 at a gate-source voltage (Vgs) of 25V at 25 °C.","PeriodicalId":410411,"journal":{"name":"2022 IEEE 9th Workshop on Wide Bandgap Power Devices & Applications (WiPDA)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127078155","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":"Design of High Power Converter with Single Low Ron Discrete SiC Device","authors":"Zibo Chen, Chen Chen, Qingyun Huang, A. Huang","doi":"10.1109/WiPDA56483.2022.9955282","DOIUrl":"https://doi.org/10.1109/WiPDA56483.2022.9955282","url":null,"abstract":"With the development of SiC technology, the on-resistance of discrete devices drops rapidly and can potentially replace the expensive power modules in high power converters. Unlike parallel discrete devices or a power module with built-in parallel dies, using a single device does not need to slow down the gate driver speed hence can achieve lower switching loss. However, there are still many challenges that need meticulous design considerations. This paper uses the 1200V TO-247-4 package device as an example to provide detailed guidance on device selection, loop optimization, insulation, thermal management, and mounting. A DC-DC converter design example is given with a very low loop inductance and excellent thermal performance. The air-cooled hardware demonstrates the hardware limitation is around 40kW in an 800V to 470V buck operation. Normalized to the Ron of the two devices used, this demonstrates an extremely high power density figure of merit of PDFOM=87kW/cm2.","PeriodicalId":410411,"journal":{"name":"2022 IEEE 9th Workshop on Wide Bandgap Power Devices & Applications (WiPDA)","volume":"156 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115746241","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}
G. Stecklein, J. Green, Christopher Wong, Joe Cao, B. Beach
{"title":"Scaling of EPC’s 100 V Enhancement-Mode Power Transistors","authors":"G. Stecklein, J. Green, Christopher Wong, Joe Cao, B. Beach","doi":"10.1109/WiPDA56483.2022.9955253","DOIUrl":"https://doi.org/10.1109/WiPDA56483.2022.9955253","url":null,"abstract":"The same core device model is shown to accurately reproduce the current-voltage and capacitance-voltage characteristics of enhancement-mode GaN 100 V power transistors of various sizes. Using linear scaling, excellent agreement with measurements is achieved over an order of magnitude variation in total gate width. Fractional variation in on-resistance is shown to decrease with increasing transistor size, with implications for integrated circuit-sized transistors where gate width decreases by up to 5 orders of magnitude.","PeriodicalId":410411,"journal":{"name":"2022 IEEE 9th Workshop on Wide Bandgap Power Devices & Applications (WiPDA)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116473317","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}
Dongyoung Kim, Skylar DeBoer, S. Jang, Adam J. Morgan, Woongje Sung
{"title":"A Comparison of Short-Circuit Failure Mechanisms of 1.2 kV 4H-SiC MOSFETs and JBSFETs","authors":"Dongyoung Kim, Skylar DeBoer, S. Jang, Adam J. Morgan, Woongje Sung","doi":"10.1109/WiPDA56483.2022.9955302","DOIUrl":"https://doi.org/10.1109/WiPDA56483.2022.9955302","url":null,"abstract":"This paper presents a comparison of 1.2 kV 4H-SiC MOSFETs and Ti JBSFETs with deep P-well structures. For a fair comparison of the short-circuit characteristics between the MOSFETs and JBSFETs, an innovative design approach for the JBSFETs was implemented to obtain the same specific on-resistance to the MOSFETs. To improve the short-circuit characteristics of the MOSFETs and JBSFETs, channeling implantation was conducted to form a deep P-well structure, that helps reduce the maximum saturation current during the shortcircuit event. Using this approach superior short-circuit characteristics are achieved in the MOSFETs and JBSFETs. However, the JBSFETs provide a shorter shortcircuit withstand time than the MOSFETs due to the high leakage current from Schottky contact. Sentaurus 2D TCAD was used to understand and clarify the short-circuit mechanisms of the MOSFETs and JBSFETs. It was discovered that the MOSFETs failed due to the high current in the channel region, but the failure of JBSFETs happens in the Schottky contact. Moreover, solutions to improve the short-circuit characteristics of the JBSFETs are proposed; a narrow Schottky width and high work function metal.","PeriodicalId":410411,"journal":{"name":"2022 IEEE 9th Workshop on Wide Bandgap Power Devices & Applications (WiPDA)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124579350","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}
David Sanabria, Randy Appert, S. Pronko, J. Major, D. DeVoto, K. Heinselman, J. Lehr, Nicolas Gonzalez, D. Ginley
{"title":"Development of a 250°C 15kV Supercascode switch using SiC JFET technology","authors":"David Sanabria, Randy Appert, S. Pronko, J. Major, D. DeVoto, K. Heinselman, J. Lehr, Nicolas Gonzalez, D. Ginley","doi":"10.1109/WiPDA56483.2022.9955247","DOIUrl":"https://doi.org/10.1109/WiPDA56483.2022.9955247","url":null,"abstract":"Tetra Corporation is developing a pulsed power drilling system for the geothermal industry. The system requires a high temperature switching technology to replace the existing technology based on Si thyristors with a temperature limit of 150°C. This work focuses on the development of such switch based on a Supercascode configuration using SiC JFET technology. The development presented contains thermal models, packaging design and processes, circuit simulations and prototypes of both the Supercascode switch and the high temperature packaged SiC JFETs.","PeriodicalId":410411,"journal":{"name":"2022 IEEE 9th Workshop on Wide Bandgap Power Devices & Applications (WiPDA)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122140391","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}
Hoang Linh Bach, Anqi Huang, Y. Teng, H. Rauh, A. Schletz, M. Jank, M. März
{"title":"Embedding Solutions for vertical SiC and GaN Power Devices","authors":"Hoang Linh Bach, Anqi Huang, Y. Teng, H. Rauh, A. Schletz, M. Jank, M. März","doi":"10.1109/WiPDA56483.2022.9955257","DOIUrl":"https://doi.org/10.1109/WiPDA56483.2022.9955257","url":null,"abstract":"This paper presents further development of a module concept for Wide Bandgap (WBG) power devices. By embedding WBG power devices in ceramic substrates, high performance of the complete package can be achieved to fully make use of their potentials. In this work, optimizations for design concept and manufacturing processes have been performed to eliminate risk of failures, especially when embedding thin and sensitive devices with fine pad structures. Warpage of package and deformation of devices have been successfully minimized by adjusting volume and layer thickness of die attach and embedded components. Furthermore, processes such as die attach applying, pre-drying and die bonding have been evaluated and improved. Thus, a significant increase of solder and Ag sinter joint quality, especially in fine chip pad areas, have been achieved. Embedded WBG packages with single chip and half bridge topology have been successfully produced and tested in terms of their functionality.","PeriodicalId":410411,"journal":{"name":"2022 IEEE 9th Workshop on Wide Bandgap Power Devices & Applications (WiPDA)","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125457599","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":"Reverse Breakdown Time of Wide Bandgap Diodes","authors":"J. Flicker, Emily Schrock, R. Kaplar","doi":"10.1109/WiPDA56483.2022.9955278","DOIUrl":"https://doi.org/10.1109/WiPDA56483.2022.9955278","url":null,"abstract":"In order to evaluate the time evolution of avalanche breakdown in wide and ultra-wide bandgap devices, we have developed a cable pulser experimental setup that can evaluate the time-evolution of the terminating impedance for a semiconductor device with a time resolution of 130 ps. We have utilized this pulser setup to evaluate the time-to-breakdown of vertical Gallium Nitride and Silicon Carbide diodes for possible use as protection elements in the electrical grid against fast transient voltage pulses (such as those induced by an electromagnetic pulse event). We have found that the Gallium Nitride device demonstrated faster dynamics compared to the Silicon Carbide device, achieving 90% conduction within 1.37 ns compared to the SiC device response time of 2.98 ns. While the Gallium Nitride device did not demonstrate significant dependence of breakdown time with applied voltage, the Silicon Carbide device breakdown time was strongly dependent on applied voltage, ranging from a value of 2.97 ns at 1.33 kV to 0.78 ns at 2.6 kV. The fast response time (< 5 ns) of both the Gallium Nitride and Silicon Carbide devices indicate that both materials systems could meet the stringent response time requirements and may be appropriate for implementation as protection elements against electromagnetic pulse transients.","PeriodicalId":410411,"journal":{"name":"2022 IEEE 9th Workshop on Wide Bandgap Power Devices & Applications (WiPDA)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127013591","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}