Pub Date : 2022-12-01DOI: 10.23919/CJEE.2022.000042
Xiaoguang Chai;Puqi Ning;Han Cao;Dan Zheng;Huakang Li;Yunhao Huang;Yuhui Kang
The aim of this study is to achieve online monitoring of the junction temperature of double-sided-cooling insulated gate bipolar transistor (IGBT) power modules by using the on-state voltage under a high current to maximize the utilization of IGBT power chips. Online junction temperature measurement plays an important role in improving the reliability of the inverter with IGBT, increasing the power density of the motor controller of electric vehicles, and reducing the cost of electric vehicles.
{"title":"Online Junction Temperature Measurement of Double-sided Cooling IGBT Power Module through On-state Voltage with High Current","authors":"Xiaoguang Chai;Puqi Ning;Han Cao;Dan Zheng;Huakang Li;Yunhao Huang;Yuhui Kang","doi":"10.23919/CJEE.2022.000042","DOIUrl":"10.23919/CJEE.2022.000042","url":null,"abstract":"The aim of this study is to achieve online monitoring of the junction temperature of double-sided-cooling insulated gate bipolar transistor (IGBT) power modules by using the on-state voltage under a high current to maximize the utilization of IGBT power chips. Online junction temperature measurement plays an important role in improving the reliability of the inverter with IGBT, increasing the power density of the motor controller of electric vehicles, and reducing the cost of electric vehicles.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"8 4","pages":"104-112"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873788/10018147/10018159.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46647988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-01DOI: 10.23919/CJEE.2022.000034
Caroline Krause;Stephan Frei
High-frequency switching of power transistors in power electronic systems can cause electromagnetic emissions. Simple approaches for reducing high-frequency disturbances, such as inserting an additional gate resistor, lead to increased power losses. This makes achieving both electromagnetic compatibility and power efficiency difficult. Active gate drivers help to find a trade-off between these two. Typically, only narrow-band disturbances must be reduced. Accordingly, a target signal with a spectrum notched at some frequencies can be defined. The target signal can be reached by a target-signal-oriented control of the transistor's gate. This leads to steeper switching slopes, such that the power losses are less increased. Generating arbitrary target signals is impossible. The transistor signal exhibits some physical limitations. A constraint satisfaction problem must be solved, and the gate drive signal must be optimized by applying a residual and Newton's method. The proposed optimization process in the frequency domain is based on the circuit simulation method named “harmonic balance”. Measurements on a DC/DC converter exhibit the benefits of this method.
{"title":"Frequency-selective Optimization of Periodic Gate Control Signals in DC/DC Converters for EMI-reduction","authors":"Caroline Krause;Stephan Frei","doi":"10.23919/CJEE.2022.000034","DOIUrl":"10.23919/CJEE.2022.000034","url":null,"abstract":"High-frequency switching of power transistors in power electronic systems can cause electromagnetic emissions. Simple approaches for reducing high-frequency disturbances, such as inserting an additional gate resistor, lead to increased power losses. This makes achieving both electromagnetic compatibility and power efficiency difficult. Active gate drivers help to find a trade-off between these two. Typically, only narrow-band disturbances must be reduced. Accordingly, a target signal with a spectrum notched at some frequencies can be defined. The target signal can be reached by a target-signal-oriented control of the transistor's gate. This leads to steeper switching slopes, such that the power losses are less increased. Generating arbitrary target signals is impossible. The transistor signal exhibits some physical limitations. A constraint satisfaction problem must be solved, and the gate drive signal must be optimized by applying a residual and Newton's method. The proposed optimization process in the frequency domain is based on the circuit simulation method named “harmonic balance”. Measurements on a DC/DC converter exhibit the benefits of this method.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"8 4","pages":"11-18"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873788/10018147/10018157.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48747311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
With the continuous development of power supplies toward miniaturization, light weights, and high levels of integration, research on high-frequency resonant conversion based on planar magnetics is becoming extensive. Combining the soft-switching characteristics of resonant converters with those of wide bandgap devices, the switching frequency can be increase to the MHz range, and the power density of the entire system can be improved considerably. However, higher switching frequencies impose new requirements for the structural design, loss distribution, and common mode (CM) noise suppression of passive magnetic components. Herein, a thorough survey of the-state-of-the-art of planar magnetics in high-frequency resonant converters is conducted. Printed circuit board winding-based planar magnetics, magnetic integration, and power-loss optimization strategies are summarized in detail. Suppression methods for CM noise in high-frequency planar magnetics are also clarified and discussed. An insight view into the future development of planar magnetics for high-frequency resonant converters is presented.
{"title":"Overview of Planar Magnetics for High-frequency Resonant Converters","authors":"Yue Liu;Yufeng Song;Dingfan Hu;Yang Li;Zuoqian Zhang;Hongfei Wu","doi":"10.23919/CJEE.2022.000039","DOIUrl":"10.23919/CJEE.2022.000039","url":null,"abstract":"With the continuous development of power supplies toward miniaturization, light weights, and high levels of integration, research on high-frequency resonant conversion based on planar magnetics is becoming extensive. Combining the soft-switching characteristics of resonant converters with those of wide bandgap devices, the switching frequency can be increase to the MHz range, and the power density of the entire system can be improved considerably. However, higher switching frequencies impose new requirements for the structural design, loss distribution, and common mode (CM) noise suppression of passive magnetic components. Herein, a thorough survey of the-state-of-the-art of planar magnetics in high-frequency resonant converters is conducted. Printed circuit board winding-based planar magnetics, magnetic integration, and power-loss optimization strategies are summarized in detail. Suppression methods for CM noise in high-frequency planar magnetics are also clarified and discussed. An insight view into the future development of planar magnetics for high-frequency resonant converters is presented.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"8 4","pages":"61-78"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873788/10018147/10018158.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49536836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Single voltage vectors applied in the conventional model predictive torque control (MPTC) for multiphase motors do not only suffer from serious torque and stator flux ripples but also cause the large harmonic current. To address the aforementioned challenges, an MPTC using a modified dual virtual vector modulation method is proposed to improve the operational performance of a dual three-phase permanent magnet synchronous motor. Virtual voltage vectors are synthesized as the candidate control set to restrain the harmonic current. A transformation method is introduced to consider both the stator flux and torque in the duty cycle modulation. The torque and stator flux ripples are simultaneously reduced by addressing the limitations of nonuniform units. Furthermore, the null voltage vector is then inserted to expand the modulation range and improve the steady-state performance. Moreover, the sawtooth carrier is adopted to address the challenge of the asymmetric switch sequence caused by the modified modulation. Finally, the experimental results are presented to verify the effectiveness and superiority of the proposed MPTC method.
{"title":"Model Predictive Torque Control for a Dual Three-phase PMSM Using Modified Dual Virtual Vector Modulation Method","authors":"Zhujin Ren;Jinghua Ji;Hongyu Tang;Tao Tao;Linsen Huang;Wenxiang Zhao","doi":"10.23919/CJEE.2022.000041","DOIUrl":"10.23919/CJEE.2022.000041","url":null,"abstract":"Single voltage vectors applied in the conventional model predictive torque control (MPTC) for multiphase motors do not only suffer from serious torque and stator flux ripples but also cause the large harmonic current. To address the aforementioned challenges, an MPTC using a modified dual virtual vector modulation method is proposed to improve the operational performance of a dual three-phase permanent magnet synchronous motor. Virtual voltage vectors are synthesized as the candidate control set to restrain the harmonic current. A transformation method is introduced to consider both the stator flux and torque in the duty cycle modulation. The torque and stator flux ripples are simultaneously reduced by addressing the limitations of nonuniform units. Furthermore, the null voltage vector is then inserted to expand the modulation range and improve the steady-state performance. Moreover, the sawtooth carrier is adopted to address the challenge of the asymmetric switch sequence caused by the modified modulation. Finally, the experimental results are presented to verify the effectiveness and superiority of the proposed MPTC method.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"8 4","pages":"91-103"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873788/10018147/10018148.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48639056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-01DOI: 10.23919/CJEE.2022.000038
Yongjie Han;Zhihong Wu;Deliang Wu
A feedforward current-sense current-compensation (CSCC) active EMI filter (AEF) for the direct current-side common-mode (CM) electromagnetic interference (EMI) suppression of high-power electric vehicle traction inverters is analyzed and designed. A detailed design of the components with formulas is provided based on an analysis of the CSCC AEF, including the CSCC AEF topology and its implementation. The feedforward active filter stage was implemented using a simple current transformer and a small circuit board. Only a small passive filter with a high resonant frequency is required for high-frequency noise attenuation. The filter's effectiveness was validated using the simulation results and experimental measurements.
{"title":"Hybrid Common-mode EMI Filter Design for Electric Vehicle Traction Inverters","authors":"Yongjie Han;Zhihong Wu;Deliang Wu","doi":"10.23919/CJEE.2022.000038","DOIUrl":"10.23919/CJEE.2022.000038","url":null,"abstract":"A feedforward current-sense current-compensation (CSCC) active EMI filter (AEF) for the direct current-side common-mode (CM) electromagnetic interference (EMI) suppression of high-power electric vehicle traction inverters is analyzed and designed. A detailed design of the components with formulas is provided based on an analysis of the CSCC AEF, including the CSCC AEF topology and its implementation. The feedforward active filter stage was implemented using a simple current transformer and a small circuit board. Only a small passive filter with a high resonant frequency is required for high-frequency noise attenuation. The filter's effectiveness was validated using the simulation results and experimental measurements.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"8 4","pages":"52-60"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873788/10018147/10018149.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45364066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-01DOI: 10.23919/CJEE.2022.000040
Sabha Raj Arya;Rakesh Maurya;Jayadeep Srikakolapu
A robust iteration-dependent least mean square (RIDLMS) algorithm-based fundamental extractor is developed to estimate the fundamental components of the load current for a four-wire DSTATCOM with a nonlinear load. The averaging parameter for calculating the variable step size is iteration dependent and uses variable tuning parameters. Rather than using the current value, the previous learning rate was used in this method to achieve a more adaptive solution. This additional control factor aids in determining the exact learning rate, resulting in reliable and convergent outcomes. Its faster convergence rate and the avoidance of local minima make it advantageous. The estimation of the PI controller gains is achieved through a self-adaptive multi-population algorithm. The adaptive change in the group number will increase exploration and exploitation. The self-adaptive nature of the algorithm was used to determine the subpopulation number needed according to the fitness value. The main advantage of this self-adaptive nature is the multi-population spread throughout the search space for a better optimal solution. The estimated gains of the PI controllers are used for the DC bus and AC terminal voltage error minimization. The RIDLMS-based control with PI gains obtained using the proposed optimization algorithm showed better power quality performance. The considered RIDLMS-supported control was demonstrated experimentally using d-SPACE-1104.
{"title":"Robust Iteration-dependent Least Mean Square-based Distribution Static Compensator Using Optimized PI Gains","authors":"Sabha Raj Arya;Rakesh Maurya;Jayadeep Srikakolapu","doi":"10.23919/CJEE.2022.000040","DOIUrl":"10.23919/CJEE.2022.000040","url":null,"abstract":"A robust iteration-dependent least mean square (RIDLMS) algorithm-based fundamental extractor is developed to estimate the fundamental components of the load current for a four-wire DSTATCOM with a nonlinear load. The averaging parameter for calculating the variable step size is iteration dependent and uses variable tuning parameters. Rather than using the current value, the previous learning rate was used in this method to achieve a more adaptive solution. This additional control factor aids in determining the exact learning rate, resulting in reliable and convergent outcomes. Its faster convergence rate and the avoidance of local minima make it advantageous. The estimation of the PI controller gains is achieved through a self-adaptive multi-population algorithm. The adaptive change in the group number will increase exploration and exploitation. The self-adaptive nature of the algorithm was used to determine the subpopulation number needed according to the fitness value. The main advantage of this self-adaptive nature is the multi-population spread throughout the search space for a better optimal solution. The estimated gains of the PI controllers are used for the DC bus and AC terminal voltage error minimization. The RIDLMS-based control with PI gains obtained using the proposed optimization algorithm showed better power quality performance. The considered RIDLMS-supported control was demonstrated experimentally using d-SPACE-1104.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"8 4","pages":"79-90"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873788/10018147/10018153.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43046350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-09-01DOI: 10.23919/CJEE.2022.000026
Sreedhar Madichetty;Avram John Neroth;Sukumar Mishra;B. Chitti Babu
Medium-duty/heavy-duty trucks (MD/HDTs) are yet to be included in India's electric mobility plans. With the improvement of electric vehicle (EV) technologies, there is a growing interest in battery-electric trucks (BETs) from original equipment manufacturers (OEMs). The time is opportune to consider electrification as a future direction for road freight in India. Accordingly, this article presents the results of an energy consumption simulation study of a BET under Indian conditions. This study specifically considered an MDBET over a domestic drive cycle. These energy consumption figures can facilitate future studies that analyze the technical and practical feasibility of BETs in the country. In addition, the article provides the requisite groundwork for BET modeling for a simulation study by reviewing available EV powertrain systems and components. Appropriate powertrain considerations are thereby obtained for a typical medium-duty/heavy-duty battery-electric truck (MD/HDBET) in the Indian context.
{"title":"Route Towards Road Freight Electrification in India: Examining Battery Electric Truck Powertrain and Energy Consumption","authors":"Sreedhar Madichetty;Avram John Neroth;Sukumar Mishra;B. Chitti Babu","doi":"10.23919/CJEE.2022.000026","DOIUrl":"10.23919/CJEE.2022.000026","url":null,"abstract":"Medium-duty/heavy-duty trucks (MD/HDTs) are yet to be included in India's electric mobility plans. With the improvement of electric vehicle (EV) technologies, there is a growing interest in battery-electric trucks (BETs) from original equipment manufacturers (OEMs). The time is opportune to consider electrification as a future direction for road freight in India. Accordingly, this article presents the results of an energy consumption simulation study of a BET under Indian conditions. This study specifically considered an MDBET over a domestic drive cycle. These energy consumption figures can facilitate future studies that analyze the technical and practical feasibility of BETs in the country. In addition, the article provides the requisite groundwork for BET modeling for a simulation study by reviewing available EV powertrain systems and components. Appropriate powertrain considerations are thereby obtained for a typical medium-duty/heavy-duty battery-electric truck (MD/HDBET) in the Indian context.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"8 3","pages":"57-75"},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873788/9915414/09915506.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49346964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-09-01DOI: 10.23919/CJEE.2022.000020
{"title":"Editorial for Special Issue on Electromagnetic Interference and Electromagnetic Compatibility in Power Electronics System","authors":"","doi":"10.23919/CJEE.2022.000020","DOIUrl":"10.23919/CJEE.2022.000020","url":null,"abstract":"","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"8 3","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873788/9915414/09915508.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46011451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-09-01DOI: 10.23919/CJEE.2022.000027
Dereje Woldegiorgis;H. Alan Mantooth
Hybrid Si/SiC switches constituting a parallel connection of a lower current rated SiC MOSFET and a higher current rated Si IGBT are becoming very attractive solution for designing high frequency and high-power density power electronic converters. Due to the complementary nature of Si IGBT devices (smaller inverter cost and smaller conduction loss) and SiC devices (smaller switching loss and higher junction temperature capability), these novel switch device configurations enable a good tradeoff between cost and efficiency for high power converter applications. One such recent application of hybrid Si/SiC switches for efficiency-cost optimization is an Si/SiC hybrid switch based ANPC inverter proposed in Ref. [30]. In Ref. [30] the topology structure, modulation strategy and the efficiency-cost benefits of the proposed ANPC inverter is presented. In this paper a precise electro-thermal power loss model for this ANPC inverter topology will be presented based on the modulation strategy of the inverter and the operating characteristics of the Si/SiC hybrid switches. The power loss model development takes into account how the current sharing between the two internal devices of the Si/SiC hybrid switches and their corresponding gate control method affects their power loss. A brief introduction to the topology structure and operation principle of the Si/SiC based ANPC inverter is first highlighted to provide context for readers and then a detailed description of the proposed electro-thermal power loss model is presented. The precision of the electro-thermal power loss model introduced in this paper is then validated using experimentally measured energy loss, device temperature and inverter efficiency data.
{"title":"Precise Electro-thermal Power Loss Model of a Three-level ANPC Inverter with Hybrid Si/SiC Switches","authors":"Dereje Woldegiorgis;H. Alan Mantooth","doi":"10.23919/CJEE.2022.000027","DOIUrl":"10.23919/CJEE.2022.000027","url":null,"abstract":"Hybrid Si/SiC switches constituting a parallel connection of a lower current rated SiC MOSFET and a higher current rated Si IGBT are becoming very attractive solution for designing high frequency and high-power density power electronic converters. Due to the complementary nature of Si IGBT devices (smaller inverter cost and smaller conduction loss) and SiC devices (smaller switching loss and higher junction temperature capability), these novel switch device configurations enable a good tradeoff between cost and efficiency for high power converter applications. One such recent application of hybrid Si/SiC switches for efficiency-cost optimization is an Si/SiC hybrid switch based ANPC inverter proposed in Ref. [30]. In Ref. [30] the topology structure, modulation strategy and the efficiency-cost benefits of the proposed ANPC inverter is presented. In this paper a precise electro-thermal power loss model for this ANPC inverter topology will be presented based on the modulation strategy of the inverter and the operating characteristics of the Si/SiC hybrid switches. The power loss model development takes into account how the current sharing between the two internal devices of the Si/SiC hybrid switches and their corresponding gate control method affects their power loss. A brief introduction to the topology structure and operation principle of the Si/SiC based ANPC inverter is first highlighted to provide context for readers and then a detailed description of the proposed electro-thermal power loss model is presented. The precision of the electro-thermal power loss model introduced in this paper is then validated using experimentally measured energy loss, device temperature and inverter efficiency data.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"8 3","pages":"76-89"},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873788/9915414/09915415.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44453080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-09-01DOI: 10.23919/CJEE.2022.000023
Dong Jiang;Zhenyu Wang;Wenjie Chen;Jianrui Liu;Xuan Zhao;Wei Sun
Solid-state transformers (SSTs) have been widely used in many areas owing to their advantages of high-frequency isolation and high power density. However, high-frequency switching causes severe electromagnetic interference (EMI) problems. Particularly, the common-mode (CM) EMI caused by the switching of the dual active bridge (DAB) converter is conducted through the parasitic capacitances in the high-frequency transformer and impacts the system reliability. With the understanding of the CM EMI model in SSTs, CM EMI mitigation methods have been studied. For passive mitigation, the coupled inductor can be integrated with the phase-shift inductor function to reduce CM EMI. For active mitigation, variations in the DAB switching frequency can help reduce the CM EMI peak. An active EMI filter can also be designed to sample and compensate for CM EMI. Using these methods, CM EMI can be reduced in SSTs.
{"title":"Common-mode Electromagnetic Interference Mitigation for Solid-state Transformers","authors":"Dong Jiang;Zhenyu Wang;Wenjie Chen;Jianrui Liu;Xuan Zhao;Wei Sun","doi":"10.23919/CJEE.2022.000023","DOIUrl":"10.23919/CJEE.2022.000023","url":null,"abstract":"Solid-state transformers (SSTs) have been widely used in many areas owing to their advantages of high-frequency isolation and high power density. However, high-frequency switching causes severe electromagnetic interference (EMI) problems. Particularly, the common-mode (CM) EMI caused by the switching of the dual active bridge (DAB) converter is conducted through the parasitic capacitances in the high-frequency transformer and impacts the system reliability. With the understanding of the CM EMI model in SSTs, CM EMI mitigation methods have been studied. For passive mitigation, the coupled inductor can be integrated with the phase-shift inductor function to reduce CM EMI. For active mitigation, variations in the DAB switching frequency can help reduce the CM EMI peak. An active EMI filter can also be designed to sample and compensate for CM EMI. Using these methods, CM EMI can be reduced in SSTs.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"8 3","pages":"22-36"},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873788/9915414/09915501.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42087151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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