Pub Date : 2022-05-15DOI: 10.23919/IPEC-Himeji2022-ECCE53331.2022.9807042
Kushan Choksi, Yuxuan Wu, Mustafeez-ul-Hassan, Fang Luo
Wide band gap device-based motor drives face motor terminal overvoltage and converter side overcurrent due to cable and motor impedance mismatch. This phenomenon is known as the reflected wave phenomenon (RWP). These overvoltage and overcurrent influences are decremental to motor drive performance and concern insulation or switch failures. Multiple factors dominate motor overvoltages and impedance mismatch, and it is of paramount significance to understand all factors impacting RWP. This paper provides a comprehensive quantification and validation for various factors affecting RWP based on rigorous experimental and simulation efforts. The study comprises impact assessment of varying voltage (100–800 V), switching device (GaN, SiC, Si), dV/dt, and cable length (1–20 m) on RWP. In addition, the paper provides simulation-based insights on the influence of different filter topologies on the reflected wave overvoltages, converter currents and damping time.
{"title":"Evaluation of Factors Impacting Reflected Wave Phenomenon in WBG Based Motor Drives","authors":"Kushan Choksi, Yuxuan Wu, Mustafeez-ul-Hassan, Fang Luo","doi":"10.23919/IPEC-Himeji2022-ECCE53331.2022.9807042","DOIUrl":"https://doi.org/10.23919/IPEC-Himeji2022-ECCE53331.2022.9807042","url":null,"abstract":"Wide band gap device-based motor drives face motor terminal overvoltage and converter side overcurrent due to cable and motor impedance mismatch. This phenomenon is known as the reflected wave phenomenon (RWP). These overvoltage and overcurrent influences are decremental to motor drive performance and concern insulation or switch failures. Multiple factors dominate motor overvoltages and impedance mismatch, and it is of paramount significance to understand all factors impacting RWP. This paper provides a comprehensive quantification and validation for various factors affecting RWP based on rigorous experimental and simulation efforts. The study comprises impact assessment of varying voltage (100–800 V), switching device (GaN, SiC, Si), dV/dt, and cable length (1–20 m) on RWP. In addition, the paper provides simulation-based insights on the influence of different filter topologies on the reflected wave overvoltages, converter currents and damping time.","PeriodicalId":256507,"journal":{"name":"2022 International Power Electronics Conference (IPEC-Himeji 2022- ECCE Asia)","volume":"217 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123066903","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 : 2022-05-15DOI: 10.23919/IPEC-Himeji2022-ECCE53331.2022.9806938
A. Yamaguchi, Y. Koishi, H. Goto
In the paper, non-sinusoidal drive method for Direct Current excited Reluctance Motor (DCRM) is proposed. The non-sinusoidal current waveform is defined by a function of Fourier series and the optimum coefficients of the current function are solved by nonlinear programming. It is confirmed that the average torque of a DCRM driven by optimized non-sinusoidal current waveform is improved by simulation results. In addition, for non-sinusoidal drive, the current balance between armature coil and excitation coil is examined.
{"title":"Examination of non-sinusoidal drive in Direct Current excited Reluctance motor","authors":"A. Yamaguchi, Y. Koishi, H. Goto","doi":"10.23919/IPEC-Himeji2022-ECCE53331.2022.9806938","DOIUrl":"https://doi.org/10.23919/IPEC-Himeji2022-ECCE53331.2022.9806938","url":null,"abstract":"In the paper, non-sinusoidal drive method for Direct Current excited Reluctance Motor (DCRM) is proposed. The non-sinusoidal current waveform is defined by a function of Fourier series and the optimum coefficients of the current function are solved by nonlinear programming. It is confirmed that the average torque of a DCRM driven by optimized non-sinusoidal current waveform is improved by simulation results. In addition, for non-sinusoidal drive, the current balance between armature coil and excitation coil is examined.","PeriodicalId":256507,"journal":{"name":"2022 International Power Electronics Conference (IPEC-Himeji 2022- ECCE Asia)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125218061","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 : 2022-05-15DOI: 10.23919/IPEC-Himeji2022-ECCE53331.2022.9807239
J. Lyu, Hongfei Lin, Yiming Rao, X. Cai
High-voltage dc (HVDC) transmission is preferred for power transfer of large-scale long-distance offshore wind farms, and practical projects based on the modular multilevel converter (MMC) for wind farms have been globally put into operation or under construction. In China, several key projects with the capacity of more than 1000 MW are being built. However, the wideband oscillation phenomena arising from the interactions between the wind farm and the MMC-HVDC system have been frequently observed in practical systems. This paper will focus on the mechanism and suppression control of wideband oscillations in MMC-HVDC connected offshore wind farms. First, the aggregation modeling of offshore wind farms and impedance modeling of MMC including internal dynamics and all control loops are conducted. On this basis, the mechanisms of wideband oscillations in the offshore wind farm-MMC interconnected system are revealed with special focus on the discussion of the main influencing factors. Then, an adaptive suppression control method for wideband oscillations is proposed. Finally, case studies will be carried out on a practical project in China to validate the effectiveness of the mechanism analysis and suppression control of wideband oscillations.
{"title":"Mechanism and Suppression Control of Wideband Oscillations in MMC-HVDC Connected Offshore Wind Farms","authors":"J. Lyu, Hongfei Lin, Yiming Rao, X. Cai","doi":"10.23919/IPEC-Himeji2022-ECCE53331.2022.9807239","DOIUrl":"https://doi.org/10.23919/IPEC-Himeji2022-ECCE53331.2022.9807239","url":null,"abstract":"High-voltage dc (HVDC) transmission is preferred for power transfer of large-scale long-distance offshore wind farms, and practical projects based on the modular multilevel converter (MMC) for wind farms have been globally put into operation or under construction. In China, several key projects with the capacity of more than 1000 MW are being built. However, the wideband oscillation phenomena arising from the interactions between the wind farm and the MMC-HVDC system have been frequently observed in practical systems. This paper will focus on the mechanism and suppression control of wideband oscillations in MMC-HVDC connected offshore wind farms. First, the aggregation modeling of offshore wind farms and impedance modeling of MMC including internal dynamics and all control loops are conducted. On this basis, the mechanisms of wideband oscillations in the offshore wind farm-MMC interconnected system are revealed with special focus on the discussion of the main influencing factors. Then, an adaptive suppression control method for wideband oscillations is proposed. Finally, case studies will be carried out on a practical project in China to validate the effectiveness of the mechanism analysis and suppression control of wideband oscillations.","PeriodicalId":256507,"journal":{"name":"2022 International Power Electronics Conference (IPEC-Himeji 2022- ECCE Asia)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117135752","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 : 2022-05-15DOI: 10.23919/IPEC-Himeji2022-ECCE53331.2022.9806848
Tomohiro Yamaguchi, Takayuki Matsumoto
This paper proposes an autonomous control to power sharing between Energy Storage Systems (ESS). ESSs are installed in a distributed, these connect to the DC grid, and the ESSs share power autonomously without communication. The proposed autonomous control solves the power sharing problem caused by communication failures. Autonomous control is based on traditional voltage droop control, but virtual resistance is a fixed value and it is characterized by manipulating the reference voltage. This control law is installed in each ESS. Each ESS manipulates the reference voltage, and the power is distributed in a coordinated manner according to the number and status of the ESSs. For ESS operation control, a method of switching between charge and discharge modes based on the battery SOC (State Of Charge) threshold has been proposed in other papers. In this method, when all ESSs below the threshold, all ESSs enter the same mode, which means that power cannot be shared and there is a high risk of system down or lifetime decrease in some situations. To solve this problem, this paper proposes a control method for sharing operation that averages the SOC of each ESS without mode switching. This paper derives the basic control law and control method of this autonomous control, quantitatively consider the amount of power sharing, and confirm its validity by experiments.
提出了一种储能系统间电力共享的自主控制方法。储能系统以分布式方式安装，这些储能系统连接到直流电网，在没有通信的情况下自主共享电力。所提出的自主控制解决了由于通信失败导致的电力共享问题。自主控制是在传统电压下垂控制的基础上进行的，而虚拟电阻是一个固定值，其特点是通过操纵参考电压。该控制律安装在每个ESS中。每个ESS控制参考电压，并根据ESS的数量和状态协调分配功率。对于ESS的运行控制，其他文献提出了一种基于电池SOC (State of charge)阈值的充放电模式切换方法。在该方法中，当所有ess低于阈值时，所有ess进入同一模式，这意味着无法共享功率，在某些情况下存在系统停机或寿命缩短的高风险。为了解决这一问题，本文提出了一种共享操作的控制方法，即在不进行模式切换的情况下平均每个ESS的SOC。本文推导了该自主控制的基本控制规律和控制方法，定量考虑了功率共享量，并通过实验验证了其有效性。
{"title":"Autonomous Control for Cooperative Operation Between Energy Storage Systems","authors":"Tomohiro Yamaguchi, Takayuki Matsumoto","doi":"10.23919/IPEC-Himeji2022-ECCE53331.2022.9806848","DOIUrl":"https://doi.org/10.23919/IPEC-Himeji2022-ECCE53331.2022.9806848","url":null,"abstract":"This paper proposes an autonomous control to power sharing between Energy Storage Systems (ESS). ESSs are installed in a distributed, these connect to the DC grid, and the ESSs share power autonomously without communication. The proposed autonomous control solves the power sharing problem caused by communication failures. Autonomous control is based on traditional voltage droop control, but virtual resistance is a fixed value and it is characterized by manipulating the reference voltage. This control law is installed in each ESS. Each ESS manipulates the reference voltage, and the power is distributed in a coordinated manner according to the number and status of the ESSs. For ESS operation control, a method of switching between charge and discharge modes based on the battery SOC (State Of Charge) threshold has been proposed in other papers. In this method, when all ESSs below the threshold, all ESSs enter the same mode, which means that power cannot be shared and there is a high risk of system down or lifetime decrease in some situations. To solve this problem, this paper proposes a control method for sharing operation that averages the SOC of each ESS without mode switching. This paper derives the basic control law and control method of this autonomous control, quantitatively consider the amount of power sharing, and confirm its validity by experiments.","PeriodicalId":256507,"journal":{"name":"2022 International Power Electronics Conference (IPEC-Himeji 2022- ECCE Asia)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117240136","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 : 2022-05-15DOI: 10.23919/IPEC-Himeji2022-ECCE53331.2022.9806845
Global warming problem is the most important and urgent problem of the world to establish a sustainable world for all creatures on the globe. Under these circumstances no one would doubt Electric Vehicle (EV) society would come in the near future of the next decade. We believe application of V2X (from Home to Power Grid) system can provide one of the best solutions to this fatal problem in the next generation.
{"title":"V2X Products and Social Implementation in Japan-future Prospects from the Point of “Global Warming Problem”","authors":"","doi":"10.23919/IPEC-Himeji2022-ECCE53331.2022.9806845","DOIUrl":"https://doi.org/10.23919/IPEC-Himeji2022-ECCE53331.2022.9806845","url":null,"abstract":"Global warming problem is the most important and urgent problem of the world to establish a sustainable world for all creatures on the globe. Under these circumstances no one would doubt Electric Vehicle (EV) society would come in the near future of the next decade. We believe application of V2X (from Home to Power Grid) system can provide one of the best solutions to this fatal problem in the next generation.","PeriodicalId":256507,"journal":{"name":"2022 International Power Electronics Conference (IPEC-Himeji 2022- ECCE Asia)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120972275","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 : 2022-05-15DOI: 10.23919/IPEC-Himeji2022-ECCE53331.2022.9807118
Yu Zhao, Dawei Li, Xiang Ren, R. Qu
Permanent magnet vernier machines (PMVMs) have drawn increasing more attention due to their high torque density, which is promising for low-speed high-torque direct-drive applications. Nowadays, researches are mainly focus on machine optimization design under the specific size and working condition. However, the difference and relationship under different power ratings are few investigated. Thus, this paper is devoted to propose a general design approach of surface-mounted permanent magnet vernier machine (SPMVM), covering different power ratings. The closed-from per-unit formation is proposed to clarify how the pole numbers, pole ratios (the pole-pair ratios of rotor PM to stator winding) and normalized geometric variables, including the ratio of magnet thickness to air-gap length, stator slot opening ratio, length-radius ratio, and so on, are related to machine performance. It reveals that SPMVMs endowed with high pole ratio and low armature winding pole-pair can achieve high torque density and high efficiency simultaneously, while the power factor of which is lower than regular PM machines due to abundant harmonic inductances. Moreover, with the increase of power ratings, power factor is further decreased and efficiency difference is further increased. Taking torque, power factor and efficiency into consideration, the preferable slot/pole combinations and dimensional parameters under different power ratings are determined. And the analysis results have been validated by Finite element analysis (FEA) and experiments.
{"title":"A General Design Approach of Surface-Mounted Permanent Magnet Vernier Machine","authors":"Yu Zhao, Dawei Li, Xiang Ren, R. Qu","doi":"10.23919/IPEC-Himeji2022-ECCE53331.2022.9807118","DOIUrl":"https://doi.org/10.23919/IPEC-Himeji2022-ECCE53331.2022.9807118","url":null,"abstract":"Permanent magnet vernier machines (PMVMs) have drawn increasing more attention due to their high torque density, which is promising for low-speed high-torque direct-drive applications. Nowadays, researches are mainly focus on machine optimization design under the specific size and working condition. However, the difference and relationship under different power ratings are few investigated. Thus, this paper is devoted to propose a general design approach of surface-mounted permanent magnet vernier machine (SPMVM), covering different power ratings. The closed-from per-unit formation is proposed to clarify how the pole numbers, pole ratios (the pole-pair ratios of rotor PM to stator winding) and normalized geometric variables, including the ratio of magnet thickness to air-gap length, stator slot opening ratio, length-radius ratio, and so on, are related to machine performance. It reveals that SPMVMs endowed with high pole ratio and low armature winding pole-pair can achieve high torque density and high efficiency simultaneously, while the power factor of which is lower than regular PM machines due to abundant harmonic inductances. Moreover, with the increase of power ratings, power factor is further decreased and efficiency difference is further increased. Taking torque, power factor and efficiency into consideration, the preferable slot/pole combinations and dimensional parameters under different power ratings are determined. And the analysis results have been validated by Finite element analysis (FEA) and experiments.","PeriodicalId":256507,"journal":{"name":"2022 International Power Electronics Conference (IPEC-Himeji 2022- ECCE Asia)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120999799","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 : 2022-05-15DOI: 10.23919/IPEC-Himeji2022-ECCE53331.2022.9806979
Pakawadee Wutthiwai, U. Kamnarn, Jedsada Yodwong, A. Namin, P. Thounthong, N. Takorabet
Dynamic and steady-State behavior of distributed power Supply in DC architecture with minimized DC bus capacitor is investigated in this paper, based on power balance control technique. The circuit is simulated and analyzed by MATLAB Simulink. The proposed system significantly improves the dynamic response of the converter to load steps with minimized dc bus capacitor for Distributed Power System. The possibility of using, in the proposed system, a reduced ratio capacitance/watt lower than the typical values used in commercial applications, while maintaining the output voltage regulation, is also theoretically proved. The minimized DC bus capacitors of the proposed system are $100mumathrm{F} (0.1mu 1{mathrm{F}/mathrm{W}})$ for 380V dc bus, $400mumathrm{F}(0.47mu mathrm{F}/mathrm{W})$ for $100text{Vdc}$ bus, $80mu mathrm{F}(0.53mu mathrm{F}/mathrm{W})$ for $60text{Vdc}$ bus, $100mu mathrm{F} (0.67mu mathrm{F}/mathrm{W})$ for $48text{Vdc}$ bus, $2000mumathrm{F}(5 mu mathrm{F}/mathrm{W})$ for 24V de bus and $2000mu mathrm{F} (5mu mathrm{F}/mathrm{W})$ for 12V dc bus. The simulation results show the following advantages: small capacitor size, reduced converter volume, good steady-state behavior, and fast dynamic transient response.
{"title":"Dynamic and Steady-State Behavior of Distributed Power Supply in DC Architecture with Minimized DC Bus Capacitor","authors":"Pakawadee Wutthiwai, U. Kamnarn, Jedsada Yodwong, A. Namin, P. Thounthong, N. Takorabet","doi":"10.23919/IPEC-Himeji2022-ECCE53331.2022.9806979","DOIUrl":"https://doi.org/10.23919/IPEC-Himeji2022-ECCE53331.2022.9806979","url":null,"abstract":"Dynamic and steady-State behavior of distributed power Supply in DC architecture with minimized DC bus capacitor is investigated in this paper, based on power balance control technique. The circuit is simulated and analyzed by MATLAB Simulink. The proposed system significantly improves the dynamic response of the converter to load steps with minimized dc bus capacitor for Distributed Power System. The possibility of using, in the proposed system, a reduced ratio capacitance/watt lower than the typical values used in commercial applications, while maintaining the output voltage regulation, is also theoretically proved. The minimized DC bus capacitors of the proposed system are $100mumathrm{F} (0.1mu 1{mathrm{F}/mathrm{W}})$ for 380V dc bus, $400mumathrm{F}(0.47mu mathrm{F}/mathrm{W})$ for $100text{Vdc}$ bus, $80mu mathrm{F}(0.53mu mathrm{F}/mathrm{W})$ for $60text{Vdc}$ bus, $100mu mathrm{F} (0.67mu mathrm{F}/mathrm{W})$ for $48text{Vdc}$ bus, $2000mumathrm{F}(5 mu mathrm{F}/mathrm{W})$ for 24V de bus and $2000mu mathrm{F} (5mu mathrm{F}/mathrm{W})$ for 12V dc bus. The simulation results show the following advantages: small capacitor size, reduced converter volume, good steady-state behavior, and fast dynamic transient response.","PeriodicalId":256507,"journal":{"name":"2022 International Power Electronics Conference (IPEC-Himeji 2022- ECCE Asia)","volume":"470 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127546250","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 : 2022-05-15DOI: 10.23919/IPEC-Himeji2022-ECCE53331.2022.9806986
A. Toba, Masanori Arata, M. Sanada, Y. Kano, Tatsuya Tonari
Increase of the rotational speed is one of the most famous way to improve the motor size and weight. However, increase of the rotational speed causes additional copper and iron losses and mechanical problems. This paper is a review paper which describes latest technical trends how to overcome these technical issues.
{"title":"Latest Technical Trend of Miniaturization, Weight Reduction, and High Efficiency of Electric Motors by Increasing the Rotational Speed","authors":"A. Toba, Masanori Arata, M. Sanada, Y. Kano, Tatsuya Tonari","doi":"10.23919/IPEC-Himeji2022-ECCE53331.2022.9806986","DOIUrl":"https://doi.org/10.23919/IPEC-Himeji2022-ECCE53331.2022.9806986","url":null,"abstract":"Increase of the rotational speed is one of the most famous way to improve the motor size and weight. However, increase of the rotational speed causes additional copper and iron losses and mechanical problems. This paper is a review paper which describes latest technical trends how to overcome these technical issues.","PeriodicalId":256507,"journal":{"name":"2022 International Power Electronics Conference (IPEC-Himeji 2022- ECCE Asia)","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124832605","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 : 2022-05-15DOI: 10.23919/IPEC-Himeji2022-ECCE53331.2022.9807121
Motochika Inohara, S. Sugahara
The development of new power semiconductor devices such as SiC with high withstand voltage, high speed, and high temperature immunity requires the control signal isolators used in them to have similar endurance characteristics. In order to meet this demand, in this research, we devised single-layer coreless micro-transformers manufactured on silicon substrates. Since these transformers have primary and secondary windings formed in the same layer, the withstand voltage can be easily increased by increasing the distance between the windings in the surface direction of the chip. In this paper, the theoretical equations of the inductance, parasitic resistance, and parasitic capacitance of the devised transformer are derived. Furthermore, comparisons between the calculation results of the S-parameters by these equations and the measured values are described.
{"title":"Basic Characteristics of Thin-Film Single-Layer Coreless Micro-Transformers for Digital Isolators","authors":"Motochika Inohara, S. Sugahara","doi":"10.23919/IPEC-Himeji2022-ECCE53331.2022.9807121","DOIUrl":"https://doi.org/10.23919/IPEC-Himeji2022-ECCE53331.2022.9807121","url":null,"abstract":"The development of new power semiconductor devices such as SiC with high withstand voltage, high speed, and high temperature immunity requires the control signal isolators used in them to have similar endurance characteristics. In order to meet this demand, in this research, we devised single-layer coreless micro-transformers manufactured on silicon substrates. Since these transformers have primary and secondary windings formed in the same layer, the withstand voltage can be easily increased by increasing the distance between the windings in the surface direction of the chip. In this paper, the theoretical equations of the inductance, parasitic resistance, and parasitic capacitance of the devised transformer are derived. Furthermore, comparisons between the calculation results of the S-parameters by these equations and the measured values are described.","PeriodicalId":256507,"journal":{"name":"2022 International Power Electronics Conference (IPEC-Himeji 2022- ECCE Asia)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125056027","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 : 2022-05-15DOI: 10.23919/IPEC-Himeji2022-ECCE53331.2022.9807002
Daniel A. Philipps, Tobias N. Ubostad, D. Peftitsis
State-of-the art Silicon Carbide Power MOS-FETs switch at unprecedented speed. Therefore, special attention must be paid to the circuit design of dynamic characterization setups. Only if parasitic layout inductances are minimal, the electrical behavior during switching tran-sients is dominated by the MOSFET characteristics, fast switching is compatible with low overshoot and ringing, and measurement data constitutes reliable characterization data. This paper presents a low inductive test platform for devices in a TO-247-3 housing. The test platform contains measurement terminals for high bandwidth measurement of both current and voltage. The experiments presented in this paper prove that high-fidelity dynamic characterization data can be obtained from Double-Pulse Tests (DPTs) using the presented test platform. Equally accurate measurements can be obtained in long-term tests and under both hard- and soft-switching conditions.
{"title":"Low Inductive Platform for Long- and Short-term Dynamic Charaterization of SiC MOSFETs","authors":"Daniel A. Philipps, Tobias N. Ubostad, D. Peftitsis","doi":"10.23919/IPEC-Himeji2022-ECCE53331.2022.9807002","DOIUrl":"https://doi.org/10.23919/IPEC-Himeji2022-ECCE53331.2022.9807002","url":null,"abstract":"State-of-the art Silicon Carbide Power MOS-FETs switch at unprecedented speed. Therefore, special attention must be paid to the circuit design of dynamic characterization setups. Only if parasitic layout inductances are minimal, the electrical behavior during switching tran-sients is dominated by the MOSFET characteristics, fast switching is compatible with low overshoot and ringing, and measurement data constitutes reliable characterization data. This paper presents a low inductive test platform for devices in a TO-247-3 housing. The test platform contains measurement terminals for high bandwidth measurement of both current and voltage. The experiments presented in this paper prove that high-fidelity dynamic characterization data can be obtained from Double-Pulse Tests (DPTs) using the presented test platform. Equally accurate measurements can be obtained in long-term tests and under both hard- and soft-switching conditions.","PeriodicalId":256507,"journal":{"name":"2022 International Power Electronics Conference (IPEC-Himeji 2022- ECCE Asia)","volume":"462 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123418399","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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