Pub Date : 2020-10-11DOI: 10.1109/ECCE44975.2020.9236185
Jagath Vallabhai Missula, R. Adda, P. Tripathy
This paper proposes a continuous conduction mode (CCM) based average current control technique for a chopper integrated single-phase five-level active neutral point clamped inverter (ANPCI) to minimize the voltage ripple in dc-link capacitors. For balancing the dc-link capacitor voltages and the flying capacitor (FC) voltage of ANPCI, a voltage balancing algorithm has been implemented which results in negligible voltage ripple for FC. However, voltage ripple in dc-link capacitors is still significant and to minimize it further, an external chopper circuit is employed at the dc-link of the ANPCI. To regulate the chopper inductor current, it is proposed to use average current control technique for the chopper integrated ANPCI. The average current controller operating in CCM is implemented along with the capacitor voltage balancing algorithm and it produces less ripple in the capacitor voltages compared to the discontinuous conduction mode techniques. Also, the chopper current becomes a nearly sinusoidal waveform. Finally, the ANPCI and chopper integrated ANPCI are implemented in hardware and their performance is compared.
{"title":"A CCM based Average Current Control Technique for Chopper Integrated Single-phase ANPC Inverter to Minimize Voltage Ripple","authors":"Jagath Vallabhai Missula, R. Adda, P. Tripathy","doi":"10.1109/ECCE44975.2020.9236185","DOIUrl":"https://doi.org/10.1109/ECCE44975.2020.9236185","url":null,"abstract":"This paper proposes a continuous conduction mode (CCM) based average current control technique for a chopper integrated single-phase five-level active neutral point clamped inverter (ANPCI) to minimize the voltage ripple in dc-link capacitors. For balancing the dc-link capacitor voltages and the flying capacitor (FC) voltage of ANPCI, a voltage balancing algorithm has been implemented which results in negligible voltage ripple for FC. However, voltage ripple in dc-link capacitors is still significant and to minimize it further, an external chopper circuit is employed at the dc-link of the ANPCI. To regulate the chopper inductor current, it is proposed to use average current control technique for the chopper integrated ANPCI. The average current controller operating in CCM is implemented along with the capacitor voltage balancing algorithm and it produces less ripple in the capacitor voltages compared to the discontinuous conduction mode techniques. Also, the chopper current becomes a nearly sinusoidal waveform. Finally, the ANPCI and chopper integrated ANPCI are implemented in hardware and their performance is compared.","PeriodicalId":433712,"journal":{"name":"2020 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"147 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125016561","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 : 2020-10-11DOI: 10.1109/ECCE44975.2020.9235923
Jiaoxin Jia, Xiangwu Yan, Benshuang Qin, A. Siddique, Bo Zhang
The disturbance types have a significant impact on the power–frequency response of multiple virtual synchronous machines (multiple VSMs). Therefore, we established an effective model to analyze the dynamic characteristics of multiple VSMs under any disturbance. Considering that the active and reactive power loops are decoupled, the model developed for the active power and frequency control loop of VSMs is equivalent to a two-terminal network that includes the first (parallel) and second (series) "admittance." The active power and angular frequency increments were analogized as the current and voltage of the circuit network. An extended two-terminal network model of the multiple-VSM parallel system was established to comprehensively and accurately depict the response of the output active power and angular frequency under disturbances of the load and active power reference. The key active power– frequency response characteristics of the multiple-VSM parallel system were deduced. The effectiveness of the proposed extended model was verified through simulations and experiments. The results indicated the suitability of the proposed model for active power–frequency response analyses of multiple-VSM parallel systems. Furthermore, the experimental results obtained under different modes agree with the theoretical analysis results, thereby validating the key conclusions.
{"title":"Extended Two-Terminal Network Model of Parallel VSMs for Analysis of Active Power–Frequency Response","authors":"Jiaoxin Jia, Xiangwu Yan, Benshuang Qin, A. Siddique, Bo Zhang","doi":"10.1109/ECCE44975.2020.9235923","DOIUrl":"https://doi.org/10.1109/ECCE44975.2020.9235923","url":null,"abstract":"The disturbance types have a significant impact on the power–frequency response of multiple virtual synchronous machines (multiple VSMs). Therefore, we established an effective model to analyze the dynamic characteristics of multiple VSMs under any disturbance. Considering that the active and reactive power loops are decoupled, the model developed for the active power and frequency control loop of VSMs is equivalent to a two-terminal network that includes the first (parallel) and second (series) \"admittance.\" The active power and angular frequency increments were analogized as the current and voltage of the circuit network. An extended two-terminal network model of the multiple-VSM parallel system was established to comprehensively and accurately depict the response of the output active power and angular frequency under disturbances of the load and active power reference. The key active power– frequency response characteristics of the multiple-VSM parallel system were deduced. The effectiveness of the proposed extended model was verified through simulations and experiments. The results indicated the suitability of the proposed model for active power–frequency response analyses of multiple-VSM parallel systems. Furthermore, the experimental results obtained under different modes agree with the theoretical analysis results, thereby validating the key conclusions.","PeriodicalId":433712,"journal":{"name":"2020 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125054107","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 : 2020-10-11DOI: 10.1109/ECCE44975.2020.9235595
Xing Wei, Zhan Shen, Yuyuan Ye, Jingwen Leng, Zhike Xu, Long Jin
This paper introduces an improved transformer- based converter, suitable for high-voltage, high-power dc loads such as electrostatic precipitators (ESPs). According to the particle separation model and distribution experiments, the main influencing factors of particle collection performance and the requirements for ESP supply are proposed and verified. By analyzing the static characteristics of the ESP supply with three typical modulation schemes, the loss reduction of IGBT bridges and power transformer are achieved with a lower cost, and the supply reliability is improved. Compensation network enhances the dynamic stability and response speed of the designed supply and guarantees the ESP collection efficiency even in the worst operating condition. Moreover, an ac resistance optimization method applicable for transformer windings is proposed. Compared with conventional design methods, the number of layers of the windings is treated as a design variable instead of as a predetermined parameter, and the core window dimension and insulation requirements are introduced as boundary conditions. The experimental results verify that the design of the power transformer and ESP supply is reasonable, and the field operation data indicate that the pollutant emission of the precipitators powered the devised high-voltage dc supply satisfy the strictest standards in China and the European Union.
{"title":"Optimization and Design of a High-Voltage Supply for Electrostatic Precipitators","authors":"Xing Wei, Zhan Shen, Yuyuan Ye, Jingwen Leng, Zhike Xu, Long Jin","doi":"10.1109/ECCE44975.2020.9235595","DOIUrl":"https://doi.org/10.1109/ECCE44975.2020.9235595","url":null,"abstract":"This paper introduces an improved transformer- based converter, suitable for high-voltage, high-power dc loads such as electrostatic precipitators (ESPs). According to the particle separation model and distribution experiments, the main influencing factors of particle collection performance and the requirements for ESP supply are proposed and verified. By analyzing the static characteristics of the ESP supply with three typical modulation schemes, the loss reduction of IGBT bridges and power transformer are achieved with a lower cost, and the supply reliability is improved. Compensation network enhances the dynamic stability and response speed of the designed supply and guarantees the ESP collection efficiency even in the worst operating condition. Moreover, an ac resistance optimization method applicable for transformer windings is proposed. Compared with conventional design methods, the number of layers of the windings is treated as a design variable instead of as a predetermined parameter, and the core window dimension and insulation requirements are introduced as boundary conditions. The experimental results verify that the design of the power transformer and ESP supply is reasonable, and the field operation data indicate that the pollutant emission of the precipitators powered the devised high-voltage dc supply satisfy the strictest standards in China and the European Union.","PeriodicalId":433712,"journal":{"name":"2020 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125089544","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 : 2020-10-11DOI: 10.1109/ECCE44975.2020.9235797
Pranoy Roy, Jiangbiao He, Y. Liao
This paper aims to optimize the cost of a battery and supercapacitor hybrid energy storage system (HESS) for dispatching solar power at one-hour increments for an entire day for megawatt-scale grid-connected photovoltaic (PV) arrays. A low-pass filter (LPF) is utilized to allocate the power between a battery and a supercapacitor (SC). The cost optimization of the HESS is calculated based on the time constant of the LPF through extensive simulations in a MATLAB/SIMULINK environment. Curve fitting and Particle Swarm Optimization (PSO) techniques are implemented to seek the optimum value of the LPF time constant. A fuzzy logic controller as a function of battery state of charge is developed to estimate the grid reference power for each one-hour dispatching period. Since the ambient temperature and PV cell temperature are different, this study also considers the relationship between them and presents their effects on energy storage cost calculations.
{"title":"Cost Optimization of Battery and Supercapacitor Hybrid Energy Storage System for Dispatching Solar PV Power","authors":"Pranoy Roy, Jiangbiao He, Y. Liao","doi":"10.1109/ECCE44975.2020.9235797","DOIUrl":"https://doi.org/10.1109/ECCE44975.2020.9235797","url":null,"abstract":"This paper aims to optimize the cost of a battery and supercapacitor hybrid energy storage system (HESS) for dispatching solar power at one-hour increments for an entire day for megawatt-scale grid-connected photovoltaic (PV) arrays. A low-pass filter (LPF) is utilized to allocate the power between a battery and a supercapacitor (SC). The cost optimization of the HESS is calculated based on the time constant of the LPF through extensive simulations in a MATLAB/SIMULINK environment. Curve fitting and Particle Swarm Optimization (PSO) techniques are implemented to seek the optimum value of the LPF time constant. A fuzzy logic controller as a function of battery state of charge is developed to estimate the grid reference power for each one-hour dispatching period. Since the ambient temperature and PV cell temperature are different, this study also considers the relationship between them and presents their effects on energy storage cost calculations.","PeriodicalId":433712,"journal":{"name":"2020 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125139102","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 : 2020-10-11DOI: 10.1109/ECCE44975.2020.9235621
A. Elserougi, Otavio Bertozzi, A. Massoud, Shehab Ahmed
Parallel connection of wind turbines (WTs) is beneficial in high-power applications. For successful operation of parallel WT-based energy conversion systems, a well-regulated voltage is needed at the collection point. Due to wind speed variation, the generated voltage from each WT may differ from one to another. Conventional solutions use regulating converters with full power rating. In this paper, a new concept is presented which depends on using fully-rated uncontrolled rectifier bridges for AC-DC conversion, and partially-rated fully-controlled bridge rectifiers which are used as voltage tuners to guarantee the flow of desired maximum power point DC currents through the parallel connected branches. The proposed system is simple, cost effective, reliable and efficient. The main drawback of the proposed system is the critical need for filters and VAR compensators on the AC side to ensure acceptable performance of the WT generator. Also, smoothing reactors are needed on the DC side for filtering of the transmitted DC current. A simulation model has been built to validate the proposed concept, and the simulation results show the effectiveness of the approach.
{"title":"Investigation of a New Voltage Balancing Circuit for Parallel-connected Offshore PMSG-based Wind Turbines","authors":"A. Elserougi, Otavio Bertozzi, A. Massoud, Shehab Ahmed","doi":"10.1109/ECCE44975.2020.9235621","DOIUrl":"https://doi.org/10.1109/ECCE44975.2020.9235621","url":null,"abstract":"Parallel connection of wind turbines (WTs) is beneficial in high-power applications. For successful operation of parallel WT-based energy conversion systems, a well-regulated voltage is needed at the collection point. Due to wind speed variation, the generated voltage from each WT may differ from one to another. Conventional solutions use regulating converters with full power rating. In this paper, a new concept is presented which depends on using fully-rated uncontrolled rectifier bridges for AC-DC conversion, and partially-rated fully-controlled bridge rectifiers which are used as voltage tuners to guarantee the flow of desired maximum power point DC currents through the parallel connected branches. The proposed system is simple, cost effective, reliable and efficient. The main drawback of the proposed system is the critical need for filters and VAR compensators on the AC side to ensure acceptable performance of the WT generator. Also, smoothing reactors are needed on the DC side for filtering of the transmitted DC current. A simulation model has been built to validate the proposed concept, and the simulation results show the effectiveness of the approach.","PeriodicalId":433712,"journal":{"name":"2020 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125856178","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 : 2020-10-11DOI: 10.1109/ECCE44975.2020.9236264
H. Eldeeb, Haisen Zhao, O. Mohammed
This study develops a real-time non-invasive discrete wavelet transformation (DWT) based fault diagnosis (FD) method to detect embryonic stator’s turn-to-turn faults (TTF) in direct torque control (DTC) driven induction motor (IM). The FD algorithm is based on decomposing the radiated magnetic flux captured by an external magnetic loop antenna (MLA) in the time-frequency domain in order to capture the fault features. Theoretical analysis of the IM’s radiated flux behavior in the case of TTF and the DTC reaction to it is presented. The FD technique was examined numerically using Finite Elements and tested experimentally.
{"title":"Time- Frequency Domain Based Diagnostics of Stator Faults in Motors Drives via Dispersal Magnetic Field","authors":"H. Eldeeb, Haisen Zhao, O. Mohammed","doi":"10.1109/ECCE44975.2020.9236264","DOIUrl":"https://doi.org/10.1109/ECCE44975.2020.9236264","url":null,"abstract":"This study develops a real-time non-invasive discrete wavelet transformation (DWT) based fault diagnosis (FD) method to detect embryonic stator’s turn-to-turn faults (TTF) in direct torque control (DTC) driven induction motor (IM). The FD algorithm is based on decomposing the radiated magnetic flux captured by an external magnetic loop antenna (MLA) in the time-frequency domain in order to capture the fault features. Theoretical analysis of the IM’s radiated flux behavior in the case of TTF and the DTC reaction to it is presented. The FD technique was examined numerically using Finite Elements and tested experimentally.","PeriodicalId":433712,"journal":{"name":"2020 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125882837","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 : 2020-10-11DOI: 10.1109/ECCE44975.2020.9235804
S. Rajendran, Soumik Sen, Liqi Zhang, Zhicheng Guo, Qingyun Huang, A. Huang
This paper presents the design and implementation of a solid-state transformer (SST) that forms a part of a larger Hybrid Solid State Transformer (HSST). The HSST comprises of a high-power line frequency transformer (LFT) and a medium voltage SiC SST. The SST is based on a soft-switched dual-active bridge topology. Recently developed 7.2kV/60A SiC Austin SuperMOS devices are used as the medium voltage switches. The predicted SST efficiency at 500VRMS and 125A is 98.01 %, and the net HSST efficiency is estimated at 98.43 % at 500kVA. The MV SST has been tested at power of 10kW and results show a high efficiency of 97%.
本文介绍了一种固态变压器(SST)的设计和实现，它是大型混合固态变压器(HSST)的一部分。HSST包括一个大功率线频变压器(LFT)和一个中压SiC SST。SST基于软交换双有源网桥拓扑。采用最新研制的7.2kV/60A SiC Austin SuperMOS器件作为中压开关。预测在500VRMS和125A时的SST效率为98.01%，在500kVA时的净HSST效率估计为98.43%。MV SST已在10kW的功率下进行了测试，结果显示效率高达97%。
{"title":"500kVA Hybrid Solid State Transformer (HSST): Design and Implementation of the SST","authors":"S. Rajendran, Soumik Sen, Liqi Zhang, Zhicheng Guo, Qingyun Huang, A. Huang","doi":"10.1109/ECCE44975.2020.9235804","DOIUrl":"https://doi.org/10.1109/ECCE44975.2020.9235804","url":null,"abstract":"This paper presents the design and implementation of a solid-state transformer (SST) that forms a part of a larger Hybrid Solid State Transformer (HSST). The HSST comprises of a high-power line frequency transformer (LFT) and a medium voltage SiC SST. The SST is based on a soft-switched dual-active bridge topology. Recently developed 7.2kV/60A SiC Austin SuperMOS devices are used as the medium voltage switches. The predicted SST efficiency at 500VRMS and 125A is 98.01 %, and the net HSST efficiency is estimated at 98.43 % at 500kVA. The MV SST has been tested at power of 10kW and results show a high efficiency of 97%.","PeriodicalId":433712,"journal":{"name":"2020 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126060819","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 : 2020-10-11DOI: 10.1109/ECCE44975.2020.9236019
P. R. V. Marthi, S. Debnath, M. Crow
Control of integrated photovoltaic (PV) plants with energy storage systems (ESSs) has become an important research and development topic in recent times. In this context, a Multi-port Autonomous Reconfigurable Solar (MARS) plant that integrates PV and ESS to alternating current transmission grid and high-voltage direct current (HVdc) link is studied in this paper. With penetration of power electronic based resources in the grid, the grid’s capability to recover from frequency or voltage disturbances are reduced. Therefore, one of the vital objectives of any new grid integrated power electronic resource is to provide advanced control functions like voltage and frequency support to the grid during disturbances. In this research work, a detailed implementation of a synchronverter-based control algorithm of MARS is presented. The proposed control algorithm and the MARS control architecture are evaluated through simulations on PSCAD/EMTDC simulation platform to showcase the performance in different operating conditions. In addition, they are evaluated in Opal-RT offline simulation models which can also be used to perform control-hardware-in-the-loop (cHIL) tests.
{"title":"Synchronverter-based Control of Multi-Port Autonomous Reconfigurable Solar Plants (MARS)","authors":"P. R. V. Marthi, S. Debnath, M. Crow","doi":"10.1109/ECCE44975.2020.9236019","DOIUrl":"https://doi.org/10.1109/ECCE44975.2020.9236019","url":null,"abstract":"Control of integrated photovoltaic (PV) plants with energy storage systems (ESSs) has become an important research and development topic in recent times. In this context, a Multi-port Autonomous Reconfigurable Solar (MARS) plant that integrates PV and ESS to alternating current transmission grid and high-voltage direct current (HVdc) link is studied in this paper. With penetration of power electronic based resources in the grid, the grid’s capability to recover from frequency or voltage disturbances are reduced. Therefore, one of the vital objectives of any new grid integrated power electronic resource is to provide advanced control functions like voltage and frequency support to the grid during disturbances. In this research work, a detailed implementation of a synchronverter-based control algorithm of MARS is presented. The proposed control algorithm and the MARS control architecture are evaluated through simulations on PSCAD/EMTDC simulation platform to showcase the performance in different operating conditions. In addition, they are evaluated in Opal-RT offline simulation models which can also be used to perform control-hardware-in-the-loop (cHIL) tests.","PeriodicalId":433712,"journal":{"name":"2020 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126136814","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 : 2020-10-11DOI: 10.1109/ECCE44975.2020.9235901
Murat G. Kesgin, Peng Han, N. Taran, D. Ionel
This paper presents the optimal study of a verniertype axial-flux permanent-magnet (AFPM) machine, which has a high-polarity spoke-type PM rotor, a wound stator with a low number of coils, and a profiled stator. Both stators have profiled teeth to enhance the magnetic interaction between the rotor PM array and stator windings for torque production. Compared to the topology with two wound stators, the studied one has a smaller total axial length and is expected more suitable for applications where the space is limited in axial direction. Both topologies are optimized through 3-dimensional (3D) finite element analysis (FEA) by the combined design of experiments (DOE) based sensitivity analysis and surrogate-assisted multiobjective differential evolution (DE) algorithm. Key factors affecting the two objectives, i.e., total active material cost and total electromagnetic loss, are identified. The optimization results are presented and compared, providing practical guidelines for the optimal design and operation of such machines. The manufacturing aspects and their impacts on the electromagnetic performance are also discussed.
{"title":"Optimal Study of a High Specific Torque Vernier-type Axial-flux PM Machine with Two Different Stators and a Single Winding","authors":"Murat G. Kesgin, Peng Han, N. Taran, D. Ionel","doi":"10.1109/ECCE44975.2020.9235901","DOIUrl":"https://doi.org/10.1109/ECCE44975.2020.9235901","url":null,"abstract":"This paper presents the optimal study of a verniertype axial-flux permanent-magnet (AFPM) machine, which has a high-polarity spoke-type PM rotor, a wound stator with a low number of coils, and a profiled stator. Both stators have profiled teeth to enhance the magnetic interaction between the rotor PM array and stator windings for torque production. Compared to the topology with two wound stators, the studied one has a smaller total axial length and is expected more suitable for applications where the space is limited in axial direction. Both topologies are optimized through 3-dimensional (3D) finite element analysis (FEA) by the combined design of experiments (DOE) based sensitivity analysis and surrogate-assisted multiobjective differential evolution (DE) algorithm. Key factors affecting the two objectives, i.e., total active material cost and total electromagnetic loss, are identified. The optimization results are presented and compared, providing practical guidelines for the optimal design and operation of such machines. The manufacturing aspects and their impacts on the electromagnetic performance are also discussed.","PeriodicalId":433712,"journal":{"name":"2020 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123272367","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}
In this paper, an 11kW wireless charging system based on LCC-SP compensation topology is established, in which a rectifier control with the current doubler is adopted. The impedance characteristics of LCC-SP topology are analyzed. The equivalent impedance of the current doubler is derived by Fourier decomposition of the rectifier current, and then the compensation parameters of LCC-SP are modified according to the derived equivalent circuit. Furtherly, the closed-loop control strategy of the system is proposed by establishing the small-signal model of the current doubler. Simulation and experimental results verified the analysis and validity of the proposed system. Finally, an 11kW wireless charging prototype for electric vehicles is built, and 91.6% efficiency from dc power source to load is achieved.
{"title":"Research on 11kW Wireless Charging System for Electric Vehicle Based on LCC-SP Topology and Current Doubler","authors":"Yunhui Wang, Meng Xiong, Xun Wang, Qile Li, Zhao Jiang, Xuezhe Wei, Haifeng Dai","doi":"10.1109/ECCE44975.2020.9235377","DOIUrl":"https://doi.org/10.1109/ECCE44975.2020.9235377","url":null,"abstract":"In this paper, an 11kW wireless charging system based on LCC-SP compensation topology is established, in which a rectifier control with the current doubler is adopted. The impedance characteristics of LCC-SP topology are analyzed. The equivalent impedance of the current doubler is derived by Fourier decomposition of the rectifier current, and then the compensation parameters of LCC-SP are modified according to the derived equivalent circuit. Furtherly, the closed-loop control strategy of the system is proposed by establishing the small-signal model of the current doubler. Simulation and experimental results verified the analysis and validity of the proposed system. Finally, an 11kW wireless charging prototype for electric vehicles is built, and 91.6% efficiency from dc power source to load is achieved.","PeriodicalId":433712,"journal":{"name":"2020 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123548365","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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