Pub Date : 2022-10-28DOI: 10.1109/ITECAsia-Pacific56316.2022.9942009
Chenglian Gao, Kangli Wang, Xianbo Zhou, Kai Jiang, Haomiao Li
Liquid metal battery (LMB) is considered a promising grid-level energy storage technology due to its low cost, long lifespan, and feasible amplification. As an all-liquid battery, the mechanisms and effects of its internal flow still need to be further studied. In this work, we establish two-dimensional (2D) axisymmetric models coupling both the thermal field and electromagnetic field based on Li|LiCl-KCl|Bi system. The fluid motions inside the batteries driven by temperature field, electromagnetic field, and coupled field are analyzed contrastively, revealing the dominant role of thermal convection. Moreover, the effects of the flow driven by different physical fields on the electrochemical reaction process are investigated. Those results are of great significance for further understanding the electrochemical process of LMB and other battery systems and optimizing the battery performance.
{"title":"Thermally and electromagnetically driven flow in liquid metal battery and their effects on ionic /atomic transport","authors":"Chenglian Gao, Kangli Wang, Xianbo Zhou, Kai Jiang, Haomiao Li","doi":"10.1109/ITECAsia-Pacific56316.2022.9942009","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9942009","url":null,"abstract":"Liquid metal battery (LMB) is considered a promising grid-level energy storage technology due to its low cost, long lifespan, and feasible amplification. As an all-liquid battery, the mechanisms and effects of its internal flow still need to be further studied. In this work, we establish two-dimensional (2D) axisymmetric models coupling both the thermal field and electromagnetic field based on Li|LiCl-KCl|Bi system. The fluid motions inside the batteries driven by temperature field, electromagnetic field, and coupled field are analyzed contrastively, revealing the dominant role of thermal convection. Moreover, the effects of the flow driven by different physical fields on the electrochemical reaction process are investigated. Those results are of great significance for further understanding the electrochemical process of LMB and other battery systems and optimizing the battery performance.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"110 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80573309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-28DOI: 10.1109/ITECAsia-Pacific56316.2022.9942219
Yizheng Wang, Jiahua Hu, Xin Fang, Jianing Li, Hongliang Wang, Z. Lan
As an essential technology to solve renewable energy absorption, energy storage plays a vital role in the new power system. However, the cost recovery of energy storage is complex, and government subsidies are still needed at this stage. To save government investment and improve the economic benefits of energy storage, the authorities need to choose an appropriate technology route so that the market can better allocate energy storage resources. The paper studies the current situation and policies of energy storage participation in the electricity market and provides essential experience for developing the regional electricity market in China. The main goal of energy storage is to maximize the portfolio’s profitability and find a balance between market revenues, overall storage costs, and reliable operations. The results of this paper suggest that the relevant authorities should clarify the main identity of energy storage in the electricity market and revise the mechanisms to help it participate in the ancillary services market, and should allow large storage plants and aggregated distributed storage to participate in each market segment, allowing them to trade flexibly in each market to exploit their flexibility and system value fully.
{"title":"Analysis of Energy Storage Participation Policies in an Electricity Market Environment","authors":"Yizheng Wang, Jiahua Hu, Xin Fang, Jianing Li, Hongliang Wang, Z. Lan","doi":"10.1109/ITECAsia-Pacific56316.2022.9942219","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9942219","url":null,"abstract":"As an essential technology to solve renewable energy absorption, energy storage plays a vital role in the new power system. However, the cost recovery of energy storage is complex, and government subsidies are still needed at this stage. To save government investment and improve the economic benefits of energy storage, the authorities need to choose an appropriate technology route so that the market can better allocate energy storage resources. The paper studies the current situation and policies of energy storage participation in the electricity market and provides essential experience for developing the regional electricity market in China. The main goal of energy storage is to maximize the portfolio’s profitability and find a balance between market revenues, overall storage costs, and reliable operations. The results of this paper suggest that the relevant authorities should clarify the main identity of energy storage in the electricity market and revise the mechanisms to help it participate in the ancillary services market, and should allow large storage plants and aggregated distributed storage to participate in each market segment, allowing them to trade flexibly in each market to exploit their flexibility and system value fully.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"41 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85120155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-28DOI: 10.1109/ITECAsia-Pacific56316.2022.9941804
P. Krein
Based on actual daily driving data, about 90% of passenger electric vehicle energy needs, both in the U.S. and in China, can be supported by charging from conventional single-phase outlets. This represents about half of all transportation energy, once the transition to electricity is complete. Basic outlet infrastructure is far cheaper and more scalable than the faster infrastructure emphasized in much present work. Comparisons are made to show how basic outlets can serve as critical electrification infrastructure. The vehicles themselves can support measurement, metering, and communication for billing and for grid flexibility. A vehicle owner can choose to support limited flexibility, controlled by the vehicle itself, to track for minimum energy pricing. Alternatively, for even lower prices, a vehicle owner could allow a grid operator or aggregator to modulate charging and support dynamic grid services. The work shows how infrastructure in a city can scale to millions of energy access points.
{"title":"Solving the 90% Infrastructure Energy Challenge for Passenger Electric Vehicles","authors":"P. Krein","doi":"10.1109/ITECAsia-Pacific56316.2022.9941804","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9941804","url":null,"abstract":"Based on actual daily driving data, about 90% of passenger electric vehicle energy needs, both in the U.S. and in China, can be supported by charging from conventional single-phase outlets. This represents about half of all transportation energy, once the transition to electricity is complete. Basic outlet infrastructure is far cheaper and more scalable than the faster infrastructure emphasized in much present work. Comparisons are made to show how basic outlets can serve as critical electrification infrastructure. The vehicles themselves can support measurement, metering, and communication for billing and for grid flexibility. A vehicle owner can choose to support limited flexibility, controlled by the vehicle itself, to track for minimum energy pricing. Alternatively, for even lower prices, a vehicle owner could allow a grid operator or aggregator to modulate charging and support dynamic grid services. The work shows how infrastructure in a city can scale to millions of energy access points.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"17 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81687656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-28DOI: 10.1109/ITECAsia-Pacific56316.2022.9941890
Chao Xu, Xiaorui Guo, Qian Xun
The dual-motor electric vehicle has a simple structure, which enables the front and rear wheels to obtain adhesion at the same time. It can improve the acceleration characteristics of the vehicle and achieve high efficiency of the system. To optimize the propulsion efficiency, a power allocation method is designed to determine the torque ratio between the front and rear axle motors. This paper proposes an efficiency-based optimal energy management strategy for dual-motor driven electric vehicles. In this way, the remaining battery state of charge is improved by reducing vehicle power loss. The energy consumption of the vehicle is firstly determined by drive cycles. The optimal distribution factor is calculated to minimize the system loss at each time sample. This determines distributions of the traction, regeneration, and mechanical braking forces between two motors. Simulation analysis is conducted under drive cycles of NEDC and WLTC. Results show that the method can reduce the total energy consumption of the system. With the proposed method, the braking energy recovery rate is improved, which also enhances the economy of the whole vehicle under different driving conditions.
{"title":"Loss Minimization Based Energy Management for a Dual Motor Electric Vehicle","authors":"Chao Xu, Xiaorui Guo, Qian Xun","doi":"10.1109/ITECAsia-Pacific56316.2022.9941890","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9941890","url":null,"abstract":"The dual-motor electric vehicle has a simple structure, which enables the front and rear wheels to obtain adhesion at the same time. It can improve the acceleration characteristics of the vehicle and achieve high efficiency of the system. To optimize the propulsion efficiency, a power allocation method is designed to determine the torque ratio between the front and rear axle motors. This paper proposes an efficiency-based optimal energy management strategy for dual-motor driven electric vehicles. In this way, the remaining battery state of charge is improved by reducing vehicle power loss. The energy consumption of the vehicle is firstly determined by drive cycles. The optimal distribution factor is calculated to minimize the system loss at each time sample. This determines distributions of the traction, regeneration, and mechanical braking forces between two motors. Simulation analysis is conducted under drive cycles of NEDC and WLTC. Results show that the method can reduce the total energy consumption of the system. With the proposed method, the braking energy recovery rate is improved, which also enhances the economy of the whole vehicle under different driving conditions.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"48 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76012956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-28DOI: 10.1109/ITECAsia-Pacific56316.2022.9942066
D. Fu, Lianke Wang, Hongyu Si, Xiaojie Wu, Li Lei, Yingsan Geng
The increased temperature capability inside the motor is a major challenge in building high power density motors for many applications in the transportation systems and aerospace industries. Inorganic insulation technology is used to break through the temperature limitation of the motor under the organic electrical insulation system (EIS) in this paper. Firstly, the high-temperature resistant ceramic insulated aluminum wire and its advantages in motors are introduced. Then, the ceramic insulated aluminum wire is applied in an electrically excited flux switching motor, and the thermal performance and design method is developed. At last, a prototype is made and experimental is put forward.
{"title":"Analysis of Electric Excitation Flux Switching Motor Based on High Temperature Resistant Inorganic Insulated Wire","authors":"D. Fu, Lianke Wang, Hongyu Si, Xiaojie Wu, Li Lei, Yingsan Geng","doi":"10.1109/ITECAsia-Pacific56316.2022.9942066","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9942066","url":null,"abstract":"The increased temperature capability inside the motor is a major challenge in building high power density motors for many applications in the transportation systems and aerospace industries. Inorganic insulation technology is used to break through the temperature limitation of the motor under the organic electrical insulation system (EIS) in this paper. Firstly, the high-temperature resistant ceramic insulated aluminum wire and its advantages in motors are introduced. Then, the ceramic insulated aluminum wire is applied in an electrically excited flux switching motor, and the thermal performance and design method is developed. At last, a prototype is made and experimental is put forward.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"105 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79083899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-28DOI: 10.1109/ITECAsia-Pacific56316.2022.9941920
Cui Chenlei, Cui Rongjing, Dong Chunhai, Wang Jianxiang, Zhang Deju, S. Su, Xiaoliang Dong
In order to reduce carbon emissions and fossil energy consumption, the number of electric vehicles in China has increased year by year in recent years and have been widely used in many fields such as logistics and transportation, public transportation and so on. A large number of electric logistics vehicles, as flexible response resources on the demand side, can participate in the demand response through load aggregators. Therefore, it is necessary to study the pricing strategy of load aggregators, so as to realize the optimization of multiple economic interests. Based on the operation model of load aggregator, a master-slave game two-level optimization model of load aggregator with energy storage resources is established by using multi-thermal codes to number vehicles. Simulation results show that the load aggregators of charging prices set by the time the influence of the proportion of electric material distribution vehicle. Energy storage device of chance constrained the confidence level is lower, the higher the income of the load aggregators, the flexibility of its response to real-time electricity price, the better, but earnings threshold, so you need to choose a reasonable confidence level to ensure that the load aggregators has certain economy and flexibility. Based on these results, we can provide a basis for pricing and energy storage configuration of composite aggregators.
{"title":"Research on dynamic pricing strategy of electric material distribution vehicle based on master-slave game and multi-hot code","authors":"Cui Chenlei, Cui Rongjing, Dong Chunhai, Wang Jianxiang, Zhang Deju, S. Su, Xiaoliang Dong","doi":"10.1109/ITECAsia-Pacific56316.2022.9941920","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9941920","url":null,"abstract":"In order to reduce carbon emissions and fossil energy consumption, the number of electric vehicles in China has increased year by year in recent years and have been widely used in many fields such as logistics and transportation, public transportation and so on. A large number of electric logistics vehicles, as flexible response resources on the demand side, can participate in the demand response through load aggregators. Therefore, it is necessary to study the pricing strategy of load aggregators, so as to realize the optimization of multiple economic interests. Based on the operation model of load aggregator, a master-slave game two-level optimization model of load aggregator with energy storage resources is established by using multi-thermal codes to number vehicles. Simulation results show that the load aggregators of charging prices set by the time the influence of the proportion of electric material distribution vehicle. Energy storage device of chance constrained the confidence level is lower, the higher the income of the load aggregators, the flexibility of its response to real-time electricity price, the better, but earnings threshold, so you need to choose a reasonable confidence level to ensure that the load aggregators has certain economy and flexibility. Based on these results, we can provide a basis for pricing and energy storage configuration of composite aggregators.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"1 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73016616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-28DOI: 10.1109/ITECAsia-Pacific56316.2022.9941981
Jiajin Wang, Lin Xu, Lingfeng Cai, Jian Zhang, Jie Tian
More than one-third of motor accidents are caused by failures in the motor insulation system, making motor insulation the weakest link in motor reliability. Thermal stress is one of the most important factors causing gradual insulation deterioration and eventually failure. In this paper, the three-dimensional temperature field model of the motor is established in Ansys Fluent, and the steady-state temperature field distribution of the motor in the air medium is calculated based on the computational fluid dynamics method, and the maximum temperature rise of the stator insulation is determined. A constant thermal stress accelerated aging test is performed on the motor stator insulation material, and a lifetime prediction model of the motor is established based on the Wiener process, which can accurately predict the lifetime of the motor insulation affected by temperature and improve the operational reliability of the motor.
{"title":"CFD-based Temperature Field Analysis and Lifetime Prediction of Brushless DC Motor","authors":"Jiajin Wang, Lin Xu, Lingfeng Cai, Jian Zhang, Jie Tian","doi":"10.1109/ITECAsia-Pacific56316.2022.9941981","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9941981","url":null,"abstract":"More than one-third of motor accidents are caused by failures in the motor insulation system, making motor insulation the weakest link in motor reliability. Thermal stress is one of the most important factors causing gradual insulation deterioration and eventually failure. In this paper, the three-dimensional temperature field model of the motor is established in Ansys Fluent, and the steady-state temperature field distribution of the motor in the air medium is calculated based on the computational fluid dynamics method, and the maximum temperature rise of the stator insulation is determined. A constant thermal stress accelerated aging test is performed on the motor stator insulation material, and a lifetime prediction model of the motor is established based on the Wiener process, which can accurately predict the lifetime of the motor insulation affected by temperature and improve the operational reliability of the motor.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"37 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79595056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-28DOI: 10.1109/ITECAsia-Pacific56316.2022.9941888
K. Wu, Jianwei Mai, Yijie Wang, Dianguo Xu, Xiufang Liu
Based on the idea of magnetic flux concentration and counteracting coil, a novel magnetic coupler (SPS-TC) is proposed, and a detailed optimization method is offered. The comparison between SPS-TC and four high-misalignment tolerant magnetic couplers demonstrates that the misalignment tolerant capability of SPS-TC with respect to the horizontal, vertical and angular displacement is better. A 1-kW prototype with LCC/S compensation topology is fabricated. The experimental results show that the output voltage ripple factor is 3.31% and 0.48% when the horizontal displacement is less than 37.5% of the coil size and the rotational angle along the Z axis is less than 45 deg, respectively, and the minimum system efficiency is 90.12%, which proves that an inductive power transfer system with SPS-TC has relatively high efficiency and a strong capability of misalignment tolerance in the horizontal and rotational directions.
{"title":"A Novel High-Misalignment Tolerant Magnetic Coupler for IPT System with Concentrated Magnetic Flux and Counteracting Coil","authors":"K. Wu, Jianwei Mai, Yijie Wang, Dianguo Xu, Xiufang Liu","doi":"10.1109/ITECAsia-Pacific56316.2022.9941888","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9941888","url":null,"abstract":"Based on the idea of magnetic flux concentration and counteracting coil, a novel magnetic coupler (SPS-TC) is proposed, and a detailed optimization method is offered. The comparison between SPS-TC and four high-misalignment tolerant magnetic couplers demonstrates that the misalignment tolerant capability of SPS-TC with respect to the horizontal, vertical and angular displacement is better. A 1-kW prototype with LCC/S compensation topology is fabricated. The experimental results show that the output voltage ripple factor is 3.31% and 0.48% when the horizontal displacement is less than 37.5% of the coil size and the rotational angle along the Z axis is less than 45 deg, respectively, and the minimum system efficiency is 90.12%, which proves that an inductive power transfer system with SPS-TC has relatively high efficiency and a strong capability of misalignment tolerance in the horizontal and rotational directions.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"56 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80421292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-28DOI: 10.1109/ITECAsia-Pacific56316.2022.9942032
Chenyu Zhang, Yunchong Wang, Tan Long, Xiaoyan Huang
For the machines powered by SiC inverters, the high voltage variation rate (dv/dt) leads to uneven voltage distribution in windings, and affects the insulation service life. To predict the influence of SiC inverter steep voltage waveform on the voltage distribution, a high frequency transmission line model is studied in this paper. The capacitance and impedance parameters at different frequencies, which are used in the studied model, are simulated with finite element method considering the laminated structure of silicon steel sheets. Further more, the frequency domain characteristics of the winding impedance are derived with vector fitting method. Based on the studied model, using the simulated and derived parameters, time domain simulation is carried out to predict the voltage distribution in each turn of the coil, and compared with the experimental results.
{"title":"Voltage Distribution Analysis of High dv/dt Fed Machines Using High Frequency Winding Model","authors":"Chenyu Zhang, Yunchong Wang, Tan Long, Xiaoyan Huang","doi":"10.1109/ITECAsia-Pacific56316.2022.9942032","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9942032","url":null,"abstract":"For the machines powered by SiC inverters, the high voltage variation rate (dv/dt) leads to uneven voltage distribution in windings, and affects the insulation service life. To predict the influence of SiC inverter steep voltage waveform on the voltage distribution, a high frequency transmission line model is studied in this paper. The capacitance and impedance parameters at different frequencies, which are used in the studied model, are simulated with finite element method considering the laminated structure of silicon steel sheets. Further more, the frequency domain characteristics of the winding impedance are derived with vector fitting method. Based on the studied model, using the simulated and derived parameters, time domain simulation is carried out to predict the voltage distribution in each turn of the coil, and compared with the experimental results.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"166 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80486688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-28DOI: 10.1109/ITECAsia-Pacific56316.2022.9941820
Chengliang Wang, Zhigang Chen, Haiyan Zheng, Qingsheng Yang
Aiming at the problem of power fluctuation during the movement of the receiving coil in the current segmented dynamic wireless charging (DWC) system, a power control strategy for DWC systems based on resonant point switching is proposed. By controlling the operating frequency of the inverter power supply so that the system works at the second resonant point, the output power is decoupled from the mutual inductance of the coil under the condition that the receiver side moves, eliminating the need for double-ended communication. In this paper, the general mathematical model of the DWC system is established, and the general parameter conditions for realizing the zero-phase operation of the system are analyzed. It is found that there are two second resonance points on both sides of the main resonance point under the over-coupling condition. Furthermore, the energy transfer characteristics of the system under different resonance points are analyzed, and the characteristics that the second resonance point can achieve constant power are verified. Finally, the constant power characteristics of the DWC system at the second resonant point under the moving condition of the receiver are verified by simulation and experiment.
{"title":"Power control study of dynamic wireless charging system based on resonant point switching","authors":"Chengliang Wang, Zhigang Chen, Haiyan Zheng, Qingsheng Yang","doi":"10.1109/ITECAsia-Pacific56316.2022.9941820","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9941820","url":null,"abstract":"Aiming at the problem of power fluctuation during the movement of the receiving coil in the current segmented dynamic wireless charging (DWC) system, a power control strategy for DWC systems based on resonant point switching is proposed. By controlling the operating frequency of the inverter power supply so that the system works at the second resonant point, the output power is decoupled from the mutual inductance of the coil under the condition that the receiver side moves, eliminating the need for double-ended communication. In this paper, the general mathematical model of the DWC system is established, and the general parameter conditions for realizing the zero-phase operation of the system are analyzed. It is found that there are two second resonance points on both sides of the main resonance point under the over-coupling condition. Furthermore, the energy transfer characteristics of the system under different resonance points are analyzed, and the characteristics that the second resonance point can achieve constant power are verified. Finally, the constant power characteristics of the DWC system at the second resonant point under the moving condition of the receiver are verified by simulation and experiment.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"69 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84234683","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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