Pub Date : 2021-11-13DOI: 10.1109/peas53589.2021.9628730
W. Zihan, Zhao Mi, Liu XiMu, Lu Min
The sensorless control methods in terms of the traditional sliding mode observer (SMO) will usually produce a large number of high frequency harmonics and integral saturation problems, which will lead to a large deviation of the estimated speed of the drive system and poor dynamic performance. Hence, a novel variable proportional desaturation proportional integral (VPDPI) speed regulator design method based on SMO with phase-locked loop (PLL) is proposed in this paper. Firstly, the PLL-SMO speed sensorless observation method is designed by self-closed-loop phase angle prediction, which greatly weakens the high frequency chattering caused by traditional SMO observation under PMSM vector control. Unfortunately, the integral saturation would be intensified due to the introduction of the PLL. To achieve it, a novel VPDPI speed regulator is further designed by combining the self-judging multi-mode switching mode with the concept of threshold segmentation, which ensures that the saturation problem in the PLL and the whole drive system can be totally eliminated. The experimental results indicate that the proposed sensorless drive system based on VPDPI regulator can accurately track the actual speed. Meanwhile, compared with the traditional PI control effect, it has better speed response performance.
{"title":"Speed Control for PMSM Drive System Based on Sliding Mode Observer with Phase-Locked Loop and Variable Proportional Desaturation PI Regulator","authors":"W. Zihan, Zhao Mi, Liu XiMu, Lu Min","doi":"10.1109/peas53589.2021.9628730","DOIUrl":"https://doi.org/10.1109/peas53589.2021.9628730","url":null,"abstract":"The sensorless control methods in terms of the traditional sliding mode observer (SMO) will usually produce a large number of high frequency harmonics and integral saturation problems, which will lead to a large deviation of the estimated speed of the drive system and poor dynamic performance. Hence, a novel variable proportional desaturation proportional integral (VPDPI) speed regulator design method based on SMO with phase-locked loop (PLL) is proposed in this paper. Firstly, the PLL-SMO speed sensorless observation method is designed by self-closed-loop phase angle prediction, which greatly weakens the high frequency chattering caused by traditional SMO observation under PMSM vector control. Unfortunately, the integral saturation would be intensified due to the introduction of the PLL. To achieve it, a novel VPDPI speed regulator is further designed by combining the self-judging multi-mode switching mode with the concept of threshold segmentation, which ensures that the saturation problem in the PLL and the whole drive system can be totally eliminated. The experimental results indicate that the proposed sensorless drive system based on VPDPI regulator can accurately track the actual speed. Meanwhile, compared with the traditional PI control effect, it has better speed response performance.","PeriodicalId":268264,"journal":{"name":"2021 IEEE 1st International Power Electronics and Application Symposium (PEAS)","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132908721","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 : 2021-11-13DOI: 10.1109/peas53589.2021.9628724
Hui Yuan, Xiaohui Qin, Wenfeng Li, Lining Su, Guangjin Shen, H. Xin
Recently, the increasing penetration of the renewable energy generation, i.e., inverter-based resources (IBRs), is challenging the grid operation. Besides, static var generators (SVGs), due to its high flexibility and controllability, have been widely-used in renewable energy generation for providing voltage support. However, the strong interaction among grid-following IBRs and SVGs may cause serious small signal stability issues, especially in weak grids. To ensure the secure operation of modern power systems, it is important to analyze the small signal stability of grid-tied IBRs with SVGs. This paper proposes a short-circuit ratio (SCR) based method for quantifying small signal stability of a single-IBR infinite-bus system (SIIBS) with a SVG located at arbitrary bus, in which SCR is a metric for quantifying small signal stability of a SIIBS from the viewpoint of grid strength. Furthermore, the key factors for the impact of a SVG on the stability of a SIIBS are investigated from the viewpoint of grid strength. Simulation results based on MATLAB/Simulink verifies the efficacy of the proposed SCR- based method.
{"title":"Small Signal Stability Analysis of Grid-Following Inverter-Based Resources in Weak Grids With SVGs Based on Grid Strength Assessment","authors":"Hui Yuan, Xiaohui Qin, Wenfeng Li, Lining Su, Guangjin Shen, H. Xin","doi":"10.1109/peas53589.2021.9628724","DOIUrl":"https://doi.org/10.1109/peas53589.2021.9628724","url":null,"abstract":"Recently, the increasing penetration of the renewable energy generation, i.e., inverter-based resources (IBRs), is challenging the grid operation. Besides, static var generators (SVGs), due to its high flexibility and controllability, have been widely-used in renewable energy generation for providing voltage support. However, the strong interaction among grid-following IBRs and SVGs may cause serious small signal stability issues, especially in weak grids. To ensure the secure operation of modern power systems, it is important to analyze the small signal stability of grid-tied IBRs with SVGs. This paper proposes a short-circuit ratio (SCR) based method for quantifying small signal stability of a single-IBR infinite-bus system (SIIBS) with a SVG located at arbitrary bus, in which SCR is a metric for quantifying small signal stability of a SIIBS from the viewpoint of grid strength. Furthermore, the key factors for the impact of a SVG on the stability of a SIIBS are investigated from the viewpoint of grid strength. Simulation results based on MATLAB/Simulink verifies the efficacy of the proposed SCR- based method.","PeriodicalId":268264,"journal":{"name":"2021 IEEE 1st International Power Electronics and Application Symposium (PEAS)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133627196","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 : 2021-11-13DOI: 10.1109/peas53589.2021.9628723
Yuancan Xu, Yandong Chen, Wenhua Wu, Shixiang Cao, Fei Yang
This article presents a complex-valued phasor domain admittance modeling technique for the equivalent circuit modeling and dynamic stability analysis of a single-phase grid-tied voltage-source converters system considering infinite-order frequency-coupling (IOFC). The basis is the symmetric structure of admittance model in rotating phasor domain, whose complex-valued admittance component can capture the frequency coupling effect. Thereafter, the equivalent circuit model (ECM) considering IOFC is established by analyzing the mechanism of coupling phenomena in detail. The proposed ECM model provides an insightful physical recognition to illustrate IOFC effect. Besides, the model is single-input and single-output (SISO), which facilitates measurement and analysis. It is found that high-order coupled frequency components are produced by low-order coupled frequency components, and its impact declines with the increase of order, which provides instruction for model order truncation. Further on, the influences of grid stiffness, phase-locked-loop bandwidth, and reference current are analyzed. These results show that the system is more likely to be unstable and the frequency coupling phenomenon is easier to be observed when the system is under weaker grid stiffness, wider PLL bandwidth, or larger reference current. Finally, experiments verified the established model and dynamic stability analysis.
{"title":"Equivalent Circuit Modeling Considered Infinite Frequencies Coupling Effects in Complex Phasor Domain","authors":"Yuancan Xu, Yandong Chen, Wenhua Wu, Shixiang Cao, Fei Yang","doi":"10.1109/peas53589.2021.9628723","DOIUrl":"https://doi.org/10.1109/peas53589.2021.9628723","url":null,"abstract":"This article presents a complex-valued phasor domain admittance modeling technique for the equivalent circuit modeling and dynamic stability analysis of a single-phase grid-tied voltage-source converters system considering infinite-order frequency-coupling (IOFC). The basis is the symmetric structure of admittance model in rotating phasor domain, whose complex-valued admittance component can capture the frequency coupling effect. Thereafter, the equivalent circuit model (ECM) considering IOFC is established by analyzing the mechanism of coupling phenomena in detail. The proposed ECM model provides an insightful physical recognition to illustrate IOFC effect. Besides, the model is single-input and single-output (SISO), which facilitates measurement and analysis. It is found that high-order coupled frequency components are produced by low-order coupled frequency components, and its impact declines with the increase of order, which provides instruction for model order truncation. Further on, the influences of grid stiffness, phase-locked-loop bandwidth, and reference current are analyzed. These results show that the system is more likely to be unstable and the frequency coupling phenomenon is easier to be observed when the system is under weaker grid stiffness, wider PLL bandwidth, or larger reference current. Finally, experiments verified the established model and dynamic stability analysis.","PeriodicalId":268264,"journal":{"name":"2021 IEEE 1st International Power Electronics and Application Symposium (PEAS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134645334","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 : 2021-11-13DOI: 10.1109/peas53589.2021.9628619
Yeting Wen, Zishun Peng, Yuxing Dai, Yi Yang, Min Li, Zijie Zheng, Zhenxing Zhao, Zeng Liu, Li Li
Power electronic devices are the key factors to determine the performance and reliability of energy routers. However, it is difficult for pure Si IGBT and SiC MOSFET to meet the requirements in efficiency, cost, capacity and reliability. In order to effectively solve these problems, this paper based on the Si IGBT/SiC MOSFET hybrid device which is composed of large capacity Si IGBT and small capacity SiC MOSFET in parallel, combined with the high-performance predictive control strategy, designed a multi-port digital energy router which can meet the harsh requirements under the new situation. The experimental results show the feasibility of the design scheme.
{"title":"Design of Energy Router Based on SiC MOSFET/ SI IGBT Hybrid Device","authors":"Yeting Wen, Zishun Peng, Yuxing Dai, Yi Yang, Min Li, Zijie Zheng, Zhenxing Zhao, Zeng Liu, Li Li","doi":"10.1109/peas53589.2021.9628619","DOIUrl":"https://doi.org/10.1109/peas53589.2021.9628619","url":null,"abstract":"Power electronic devices are the key factors to determine the performance and reliability of energy routers. However, it is difficult for pure Si IGBT and SiC MOSFET to meet the requirements in efficiency, cost, capacity and reliability. In order to effectively solve these problems, this paper based on the Si IGBT/SiC MOSFET hybrid device which is composed of large capacity Si IGBT and small capacity SiC MOSFET in parallel, combined with the high-performance predictive control strategy, designed a multi-port digital energy router which can meet the harsh requirements under the new situation. The experimental results show the feasibility of the design scheme.","PeriodicalId":268264,"journal":{"name":"2021 IEEE 1st International Power Electronics and Application Symposium (PEAS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114248614","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 : 2021-11-13DOI: 10.1109/peas53589.2021.9628580
Xiaoyun Chen, Jun Luo, D. Lin
In this paper, Partial Element Equivalent Circuit method (PEEC) is used to model multi-dimensional Helmholtz coils. Spatial magnetic flux density of multi-dimensional Helmholtz coils are calculated; the visualization of the uniform intensity region is realized. The envelope diagrams of the uniform magnetic field with the normalized magnetic flux density difference less than 1% and 2% are drawn, and the magnetic field distribution of Helmholtz coils of different dimensions are compared and analyzed. The effect of different placement positions of the receiving coil on the magnetic flux density of the Helmholtz coil are studied. The results of PEEC calculation are compared with those obtained by ANSYS simulation tool and analytical calculation, which proves the feasibility of PEEC to calculate the magnetic flux density for induction coils.
{"title":"Analysis and Visualization of Magnetic Field for Multi-dimensional Helmholtz Coils Based on PEEC","authors":"Xiaoyun Chen, Jun Luo, D. Lin","doi":"10.1109/peas53589.2021.9628580","DOIUrl":"https://doi.org/10.1109/peas53589.2021.9628580","url":null,"abstract":"In this paper, Partial Element Equivalent Circuit method (PEEC) is used to model multi-dimensional Helmholtz coils. Spatial magnetic flux density of multi-dimensional Helmholtz coils are calculated; the visualization of the uniform intensity region is realized. The envelope diagrams of the uniform magnetic field with the normalized magnetic flux density difference less than 1% and 2% are drawn, and the magnetic field distribution of Helmholtz coils of different dimensions are compared and analyzed. The effect of different placement positions of the receiving coil on the magnetic flux density of the Helmholtz coil are studied. The results of PEEC calculation are compared with those obtained by ANSYS simulation tool and analytical calculation, which proves the feasibility of PEEC to calculate the magnetic flux density for induction coils.","PeriodicalId":268264,"journal":{"name":"2021 IEEE 1st International Power Electronics and Application Symposium (PEAS)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117308676","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}
Inductive power transfer (IPT) technology is suitable for battery charging applications due to its advantages of safety, convenience and weather proof. A primary shunt inductor compensation topology (named as L-S/S) is proposed in this paper to achieve a target constant current (CC) and constant voltage (CV) battery charging profile with natural zero voltage switching (ZVS). The design and analysis of L-S/S compensation are based on the characteristics of the gyrator as it provides a simple way to analyze the resonant circuits. Load-independent CV outputs and CC outputs can be achieved at two different operating frequencies, respectively. Zero phase angle (ZPA) can be maintained at these two operating frequencies to eliminate the reactive power. Since the shunt inductor of the primary side naturally provides a turn-off current, ZVS can be achieved at the exact resonance point without other assisted methods such as slightly adjusting the resonant parameters. Experiments are carried out on a 1kW prototype to prove the proposed method. Experimental results show that ZVS is naturally realized in various charging states. The current fluctuation is less than 1% in CC mode, and the voltage fluctuation is less than 4% in CV mode. Steady outputs can be achieved by slightly modulating the operating frequency. The peak efficiency is 95.2% at rated power.
{"title":"A Primary Shunt Inductor Compensated Inductive Power Transfer System with Natural ZVS for Battery Charging Application","authors":"Shiying Luo, Zhuhaobo Zhang, Guanxi Li, Zirui Yao, Xin Zhang, Hao Ma","doi":"10.1109/peas53589.2021.9628517","DOIUrl":"https://doi.org/10.1109/peas53589.2021.9628517","url":null,"abstract":"Inductive power transfer (IPT) technology is suitable for battery charging applications due to its advantages of safety, convenience and weather proof. A primary shunt inductor compensation topology (named as L-S/S) is proposed in this paper to achieve a target constant current (CC) and constant voltage (CV) battery charging profile with natural zero voltage switching (ZVS). The design and analysis of L-S/S compensation are based on the characteristics of the gyrator as it provides a simple way to analyze the resonant circuits. Load-independent CV outputs and CC outputs can be achieved at two different operating frequencies, respectively. Zero phase angle (ZPA) can be maintained at these two operating frequencies to eliminate the reactive power. Since the shunt inductor of the primary side naturally provides a turn-off current, ZVS can be achieved at the exact resonance point without other assisted methods such as slightly adjusting the resonant parameters. Experiments are carried out on a 1kW prototype to prove the proposed method. Experimental results show that ZVS is naturally realized in various charging states. The current fluctuation is less than 1% in CC mode, and the voltage fluctuation is less than 4% in CV mode. Steady outputs can be achieved by slightly modulating the operating frequency. The peak efficiency is 95.2% at rated power.","PeriodicalId":268264,"journal":{"name":"2021 IEEE 1st International Power Electronics and Application Symposium (PEAS)","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115889316","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 : 2021-11-13DOI: 10.1109/peas53589.2021.9628433
Bingtao Zhang, Weimin Wu, Ning Gao, E. Koutroulis, H. Chung, F. Blaabjerg
In recent years, due to fast dynamic response, no modulator and multi-constraint control, the finite control set model predictive control (FCS-MPC) has been widely employed in power converters. However, the computational burden of traditional FCS-MPC is relatively heavy owing to traversing all possible voltage vectors. In this paper, a novel FCS-MPC algorithm is proposed for LCL-type grid-connected inverters. Firstly, the weighted average inductor current (WAIC) algorithm is utilized to lower the order of the LCL filter model. Then, based on the idea of deadbeat control, the expected inverter output voltage vector is calculated according to the grid-injected current reference. Depending on the desired voltage vector, the optimal voltage vector which minimizes the constructed cost function, is selected from its neighboring voltage vectors. Compared with the traditional FCS-MPC techniques, the proposed control algorithm can decrease the candidate voltage vectors from eight to three, which effectively reduces the computational complexity of the algorithm. A simulation model and experimental platform of a two-level three-phase grid-connected inverter are established to prove the performance of the proposed algorithm.
{"title":"Finite Control Set - Model Predictive Control Based on Deadbeat Control for LCL-Type Grid-connected Inverters","authors":"Bingtao Zhang, Weimin Wu, Ning Gao, E. Koutroulis, H. Chung, F. Blaabjerg","doi":"10.1109/peas53589.2021.9628433","DOIUrl":"https://doi.org/10.1109/peas53589.2021.9628433","url":null,"abstract":"In recent years, due to fast dynamic response, no modulator and multi-constraint control, the finite control set model predictive control (FCS-MPC) has been widely employed in power converters. However, the computational burden of traditional FCS-MPC is relatively heavy owing to traversing all possible voltage vectors. In this paper, a novel FCS-MPC algorithm is proposed for LCL-type grid-connected inverters. Firstly, the weighted average inductor current (WAIC) algorithm is utilized to lower the order of the LCL filter model. Then, based on the idea of deadbeat control, the expected inverter output voltage vector is calculated according to the grid-injected current reference. Depending on the desired voltage vector, the optimal voltage vector which minimizes the constructed cost function, is selected from its neighboring voltage vectors. Compared with the traditional FCS-MPC techniques, the proposed control algorithm can decrease the candidate voltage vectors from eight to three, which effectively reduces the computational complexity of the algorithm. A simulation model and experimental platform of a two-level three-phase grid-connected inverter are established to prove the performance of the proposed algorithm.","PeriodicalId":268264,"journal":{"name":"2021 IEEE 1st International Power Electronics and Application Symposium (PEAS)","volume":"537 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116164662","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 : 2021-11-13DOI: 10.1109/peas53589.2021.9628585
Chao Zhang, Xin Xie, Kun Qu, Bo Hu, Zongjian Li, Jun Wang
In this paper, a hybrid Si/SiC continuous conduction mode (CCM) interleaved totem-pole bridgeless PFC converter is proposed, which is consists of a small-capacity highfrequency SiC phase and a large-capacity low-frequency Si phase, instead of two identical SiC phases in conventional design. Thus, it has a lower total cost compared to the all-SiC interleaved TPBPFC converter. Meanwhile, a coupled inductor is applied to simplify the structure and further reduce the cost of magnetic components. A new hybrid-frequency interleaving technique is developed to coordinate the Si and SiC phase operations and offer an improved tradeoff between cost and performance. Furthermore, a master-slave control structure, which combines the average current mode control (ACMC) and modulated model predictive control (MMPC), is proposed to implement the proposed hybrid-frequency unique technique. A 3kW prototype has been built to verify the effectiveness and advantages of the proposed TPBPFC converter and control strategy.
{"title":"A Hybrid Si/SiC CCM Interleaved Totem-Pole Bridgeless PFC Converter with Coupled-Inductor and Hybrid-Frequency Interleaving Operation","authors":"Chao Zhang, Xin Xie, Kun Qu, Bo Hu, Zongjian Li, Jun Wang","doi":"10.1109/peas53589.2021.9628585","DOIUrl":"https://doi.org/10.1109/peas53589.2021.9628585","url":null,"abstract":"In this paper, a hybrid Si/SiC continuous conduction mode (CCM) interleaved totem-pole bridgeless PFC converter is proposed, which is consists of a small-capacity highfrequency SiC phase and a large-capacity low-frequency Si phase, instead of two identical SiC phases in conventional design. Thus, it has a lower total cost compared to the all-SiC interleaved TPBPFC converter. Meanwhile, a coupled inductor is applied to simplify the structure and further reduce the cost of magnetic components. A new hybrid-frequency interleaving technique is developed to coordinate the Si and SiC phase operations and offer an improved tradeoff between cost and performance. Furthermore, a master-slave control structure, which combines the average current mode control (ACMC) and modulated model predictive control (MMPC), is proposed to implement the proposed hybrid-frequency unique technique. A 3kW prototype has been built to verify the effectiveness and advantages of the proposed TPBPFC converter and control strategy.","PeriodicalId":268264,"journal":{"name":"2021 IEEE 1st International Power Electronics and Application Symposium (PEAS)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124490732","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 : 2021-11-13DOI: 10.1109/peas53589.2021.9628532
Ce Xu, Fanghua Zhang, Guangdong Dong
For isolated power converters, both conducted and radiated electromagnetic interference (EMI) are dependent on the common-mode (CM) performance of transformers. This paper proposes an RLC ladder network modeling and its parameter extraction technique to characterize the wideband CM properties of transformers at the circuit level. It is proved that the ladder network covers detailed electric and magnetic parameters, therefore, is more applicable for wideband than commonly used lumped models. The finite element method (FEM) is selected to extract parameters for accuracy. Influential factors on parameters, including geometries and material properties are also presented. With S21 parameter as the evaluation method of transformers’ CM performance, the proposed modeling technique is verified from 100 kHz to 200 MHz on a planar transformer through the comparison between measured and simulated S21 parameter.
{"title":"Wideband Modeling of Transformer Common-Mode Characteristics Using RLC Ladder Network","authors":"Ce Xu, Fanghua Zhang, Guangdong Dong","doi":"10.1109/peas53589.2021.9628532","DOIUrl":"https://doi.org/10.1109/peas53589.2021.9628532","url":null,"abstract":"For isolated power converters, both conducted and radiated electromagnetic interference (EMI) are dependent on the common-mode (CM) performance of transformers. This paper proposes an RLC ladder network modeling and its parameter extraction technique to characterize the wideband CM properties of transformers at the circuit level. It is proved that the ladder network covers detailed electric and magnetic parameters, therefore, is more applicable for wideband than commonly used lumped models. The finite element method (FEM) is selected to extract parameters for accuracy. Influential factors on parameters, including geometries and material properties are also presented. With S21 parameter as the evaluation method of transformers’ CM performance, the proposed modeling technique is verified from 100 kHz to 200 MHz on a planar transformer through the comparison between measured and simulated S21 parameter.","PeriodicalId":268264,"journal":{"name":"2021 IEEE 1st International Power Electronics and Application Symposium (PEAS)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122714219","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 : 2021-11-13DOI: 10.1109/peas53589.2021.9628884
Shiwei Liang, Jiaqi Guo, Hangzhi Liu, Jun Wang
High voltage power semiconductor devices with ultra-fast turn-on speed have always been highly desirable for advanced pulsed power applications. In recent years, the wide band gap semiconductor such as silicon carbide (SiC) has been given extensive attention to fabricating high voltage power devices due to its superior material and electrical properties over silicon. Among all SiC power switches, SiC gate turn-off thyristor (GTO) possesses not only high blocking voltage, but also excellent current handling capability and ultra-high turn-on di/dt. This research focuses on the characterization and pulse evaluation of a homemade high voltage SiC p-type GTO. The SiC GTO has a die size of 7.8 mm × 7.8 mm, and it possesses a differential on-resistance of 33.5 mΩ•cm2 and a high forward blocking voltage of 6.3 kV. The SiC GTO was pulsed in a homemade pulse power discharging system. The test results show that the peak current and di/dt of the SiC GTO during turn-on process can reach up to 9.04 kA (14.86 kA/cm2) and 10.70 kA/µs, respectively, indicating that the SiC GTO is very promising for pulsed power applications.
具有超快导通速度的高压功率半导体器件一直是先进脉冲功率应用的理想选择。近年来，以碳化硅(SiC)为代表的宽带隙半导体由于其优越的材料和电学性能，在高压电源器件的制造中受到了广泛的关注。在所有SiC功率开关中，SiC栅极关断可控硅(GTO)不仅具有高阻断电压，而且具有出色的电流处理能力和超高的导通di/dt。本文主要研究了自制的高电压SiC p型GTO的特性和脉冲评价。SiC GTO的芯片尺寸为7.8 mm × 7.8 mm，差分导通电阻为33.5 mΩ•cm2，正向阻断电压为6.3 kV。在自制的脉冲放电系统中对碳化硅GTO进行了脉冲放电。测试结果表明，SiC GTO在导通过程中的峰值电流和di/dt分别可以达到9.04 kA (14.86 kA/cm2)和10.70 kA/µs，这表明SiC GTO在脉冲功率应用中非常有前景。
{"title":"Evaluation of High-Voltage 4H-SiC Gate Turn-off Thyristor for Pulsed Power Application","authors":"Shiwei Liang, Jiaqi Guo, Hangzhi Liu, Jun Wang","doi":"10.1109/peas53589.2021.9628884","DOIUrl":"https://doi.org/10.1109/peas53589.2021.9628884","url":null,"abstract":"High voltage power semiconductor devices with ultra-fast turn-on speed have always been highly desirable for advanced pulsed power applications. In recent years, the wide band gap semiconductor such as silicon carbide (SiC) has been given extensive attention to fabricating high voltage power devices due to its superior material and electrical properties over silicon. Among all SiC power switches, SiC gate turn-off thyristor (GTO) possesses not only high blocking voltage, but also excellent current handling capability and ultra-high turn-on di/dt. This research focuses on the characterization and pulse evaluation of a homemade high voltage SiC p-type GTO. The SiC GTO has a die size of 7.8 mm × 7.8 mm, and it possesses a differential on-resistance of 33.5 mΩ•cm2 and a high forward blocking voltage of 6.3 kV. The SiC GTO was pulsed in a homemade pulse power discharging system. The test results show that the peak current and di/dt of the SiC GTO during turn-on process can reach up to 9.04 kA (14.86 kA/cm2) and 10.70 kA/µs, respectively, indicating that the SiC GTO is very promising for pulsed power applications.","PeriodicalId":268264,"journal":{"name":"2021 IEEE 1st International Power Electronics and Application Symposium (PEAS)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126132603","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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