Pub Date : 2018-03-04DOI: 10.1109/APEC.2018.8341384
Hang Dai, T. Jahns
Pulse-width-modulated (PWM) current-source inverters (CSIs) in machine drives have received limited research attention since the 1980s because they are generally considered to be inferior to PWM voltage-source inverters (VSIs) in terms of several performance metrics. However, in view of the special features of wide-bandgap (WBG) power semiconductors that distinguish them from today's silicon devices, this paper uses simulation to reexamine the PWM-CSI's key performance metrics including efficiency, electromagnetic interference (EMI), and machine over-voltage at high switching frequencies (e.g., 200kHz) compared with two-level WBG-enabled VSIs under similar operating conditions. Advantages of the CSI compared to the baseline VSI topology are revealed for each of these three performance features. Reverse-voltage-blocking switches based on gallium nitride (GaN) High Electron Mobility Transistors (HEMTs) that are key to the operation of PWM-CSIs are discussed and experimentally evaluated.
{"title":"Comparative investigation of PWM current-source inverters for future machine drives using high-frequency wide-bandgap power switches","authors":"Hang Dai, T. Jahns","doi":"10.1109/APEC.2018.8341384","DOIUrl":"https://doi.org/10.1109/APEC.2018.8341384","url":null,"abstract":"Pulse-width-modulated (PWM) current-source inverters (CSIs) in machine drives have received limited research attention since the 1980s because they are generally considered to be inferior to PWM voltage-source inverters (VSIs) in terms of several performance metrics. However, in view of the special features of wide-bandgap (WBG) power semiconductors that distinguish them from today's silicon devices, this paper uses simulation to reexamine the PWM-CSI's key performance metrics including efficiency, electromagnetic interference (EMI), and machine over-voltage at high switching frequencies (e.g., 200kHz) compared with two-level WBG-enabled VSIs under similar operating conditions. Advantages of the CSI compared to the baseline VSI topology are revealed for each of these three performance features. Reverse-voltage-blocking switches based on gallium nitride (GaN) High Electron Mobility Transistors (HEMTs) that are key to the operation of PWM-CSIs are discussed and experimentally evaluated.","PeriodicalId":113756,"journal":{"name":"2018 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124929102","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}
A high efficient three-level rectifier comprising SiC & Si hybrid power stage is proposed. It enables the high voltage applications with three-level NPC topology. It presents extremely low switching loss because all the Si devices are low-speed switching. At the same time, the total device cost of this rectifier is much lower than all SiC-based rectifiers. Furthermore, this topology is easy to be configured as high power type since all the devices can use half-bridge modules. In this paper, the circuit operational analysis, simulation, and experimental results are given. A comparison is given to show the advantages of the proposed rectifier.
{"title":"High power three-level rectifier comprising SiC MOSFET & Si diode hybrid power stage","authors":"Chushan Li, Jintao Lei, Qingxin Guan, Yu Zhang, Shuai Wang, David Xu","doi":"10.1109/APEC.2018.8340981","DOIUrl":"https://doi.org/10.1109/APEC.2018.8340981","url":null,"abstract":"A high efficient three-level rectifier comprising SiC & Si hybrid power stage is proposed. It enables the high voltage applications with three-level NPC topology. It presents extremely low switching loss because all the Si devices are low-speed switching. At the same time, the total device cost of this rectifier is much lower than all SiC-based rectifiers. Furthermore, this topology is easy to be configured as high power type since all the devices can use half-bridge modules. In this paper, the circuit operational analysis, simulation, and experimental results are given. A comparison is given to show the advantages of the proposed rectifier.","PeriodicalId":113756,"journal":{"name":"2018 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"142 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129422016","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 : 2018-03-04DOI: 10.1109/APEC.2018.8341180
Mehrdad Biglarbegian, Saman Mostafavi, Sven Hauer, S. J. Nibir, Namwon Kim, R. Cox, B. Parkhideh
There is no doubt that in the future, a need for higher switching frequency is inevitable to extract the full benefits of reliable Gallium Nitride (GaN) device characteristics. Along with the reliability enhancement for GaN-based power converters, it is essential to monitor a precursor signature identification for diagnostics/prognostics techniques. With the availability of the most granular information deduced from advanced devices, a new data-driven scheme is proposed for system monitoring and possible lifetime extension of 400W power GaN converters at 100kHz. The approach relies on the real-time Rds(on) data extraction from the power converter, and calibration of an adaptive model using multi-physics co-simulations under thermal cycling. More specifically, the focus is on deploying machine learning algorithms to exploit for the parameter estimation in power electronics engineering reliability.
{"title":"On condition monitoring of high frequency power GaN converters with adaptive prognostics","authors":"Mehrdad Biglarbegian, Saman Mostafavi, Sven Hauer, S. J. Nibir, Namwon Kim, R. Cox, B. Parkhideh","doi":"10.1109/APEC.2018.8341180","DOIUrl":"https://doi.org/10.1109/APEC.2018.8341180","url":null,"abstract":"There is no doubt that in the future, a need for higher switching frequency is inevitable to extract the full benefits of reliable Gallium Nitride (GaN) device characteristics. Along with the reliability enhancement for GaN-based power converters, it is essential to monitor a precursor signature identification for diagnostics/prognostics techniques. With the availability of the most granular information deduced from advanced devices, a new data-driven scheme is proposed for system monitoring and possible lifetime extension of 400W power GaN converters at 100kHz. The approach relies on the real-time Rds(on) data extraction from the power converter, and calibration of an adaptive model using multi-physics co-simulations under thermal cycling. More specifically, the focus is on deploying machine learning algorithms to exploit for the parameter estimation in power electronics engineering reliability.","PeriodicalId":113756,"journal":{"name":"2018 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"63 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116382502","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 : 2018-03-04DOI: 10.1109/APEC.2018.8341313
Chih-Shen Yeh, Lanhua Zhang, Jung-Muk Choe, Cheng-Wei Chen, O. Yu, J. Lai
Synchronous rectification technique can reduce secondary-side conduction loss of the LLC resonant converter. Typically, the control of synchronous rectifier (SR) relies on either voltage or current information; however, the detection circuit is sensitive to parasitic effects and high frequency noises. Since reliability is among top priorities in solid-state transformer application, open-loop controlled scheme becomes advantageous. Unfortunately, secondary-side current of LLC converter reaches zero-crossing-point (ZCP) earlier at light-load condition and the SR signal could turn off after ZCP. In that case, high circulating current appears in the secondary side and dramatically deteriorate efficiency. Therefore, a tuning method utilizing external primary-side output capacitor and dead-time extension is proposed to avoid late turn-off issue of open-loop controlled scheme. In this paper, the cause of ZCP shifting and late turn-off issue are explained first. Then a model for dead-time transient of LLC converter is derived as the theoretical basis of proposed tuning method. Finally, hardware testing results of a 4-kW LLC converter module are presented. With the proposed tuning method, the open-loop controlled synchronous rectification can improve the efficiency of the LLC converter module even at light-load condition.
{"title":"Light-load efficiency improvement for LLC converter with synchronous rectification in solid-state transformer application","authors":"Chih-Shen Yeh, Lanhua Zhang, Jung-Muk Choe, Cheng-Wei Chen, O. Yu, J. Lai","doi":"10.1109/APEC.2018.8341313","DOIUrl":"https://doi.org/10.1109/APEC.2018.8341313","url":null,"abstract":"Synchronous rectification technique can reduce secondary-side conduction loss of the LLC resonant converter. Typically, the control of synchronous rectifier (SR) relies on either voltage or current information; however, the detection circuit is sensitive to parasitic effects and high frequency noises. Since reliability is among top priorities in solid-state transformer application, open-loop controlled scheme becomes advantageous. Unfortunately, secondary-side current of LLC converter reaches zero-crossing-point (ZCP) earlier at light-load condition and the SR signal could turn off after ZCP. In that case, high circulating current appears in the secondary side and dramatically deteriorate efficiency. Therefore, a tuning method utilizing external primary-side output capacitor and dead-time extension is proposed to avoid late turn-off issue of open-loop controlled scheme. In this paper, the cause of ZCP shifting and late turn-off issue are explained first. Then a model for dead-time transient of LLC converter is derived as the theoretical basis of proposed tuning method. Finally, hardware testing results of a 4-kW LLC converter module are presented. With the proposed tuning method, the open-loop controlled synchronous rectification can improve the efficiency of the LLC converter module even at light-load condition.","PeriodicalId":113756,"journal":{"name":"2018 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125465648","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 : 2018-03-04DOI: 10.1109/APEC.2018.8341149
Yeran Liu, R. Mai, Pengfei Yue, Zhengyou He
The detuning of inductive power transfer (IPT) system which is usually caused by the component tolerance and aging of the inductors and capacitors can decrease the system efficiency. In order to tune the receiver circuit of IPT system, an inductor is paralleled with a diode full-bridge rectifier cascaded with a Buck converter and load serving as a tuning circuit. By changing the duty cycle of the buck converter, the impedance of the tuning circuit can be adjusted which can be used to compensate the reactance caused by detuning. The experimental results in a 400W prototype show that with 15% tolerance of the resonant capacitor in the receiver side, the system efficiency with the proposed method can reach 91% which has an improvement by 7.9% compared to the detuned system.
{"title":"A dynamic tuning method utilizing inductor paralleled with load for inductive power transfer","authors":"Yeran Liu, R. Mai, Pengfei Yue, Zhengyou He","doi":"10.1109/APEC.2018.8341149","DOIUrl":"https://doi.org/10.1109/APEC.2018.8341149","url":null,"abstract":"The detuning of inductive power transfer (IPT) system which is usually caused by the component tolerance and aging of the inductors and capacitors can decrease the system efficiency. In order to tune the receiver circuit of IPT system, an inductor is paralleled with a diode full-bridge rectifier cascaded with a Buck converter and load serving as a tuning circuit. By changing the duty cycle of the buck converter, the impedance of the tuning circuit can be adjusted which can be used to compensate the reactance caused by detuning. The experimental results in a 400W prototype show that with 15% tolerance of the resonant capacitor in the receiver side, the system efficiency with the proposed method can reach 91% which has an improvement by 7.9% compared to the detuned system.","PeriodicalId":113756,"journal":{"name":"2018 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133783619","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 : 2018-03-04DOI: 10.1109/APEC.2018.8340992
Shuai Jiang, Chenhao Nan, Xin Li, C. Chung, M. Yazdani
This paper presents a new class of Switched Tank Converters (abbreviated as STCs) for high efficiency high density non-isolated DC-DC application where large voltage step down (up) ratios are required. Distinguished from switched capacitor converters, the STCs uniquely employ LC resonant tanks to partially replace the flying capacitors for energy transfer. Full soft charging, soft switching and minimal device voltage stresses are achieved under all operating conditions. The STCs feature very high efficiency, density and robustness against component non-idealities over a wide range. Furthermore, thanks to the full resonant operation, multiple STCs can operate in parallel with inherent droop current sharing, offering the best scalability and control simplicity. These attributes of STC make it a disruptive and robust technology viable for industry's high volume adoption. A novel equivalent DCX building block principle is introduced to simplify the analysis of STC. A 98.92% efficiency STC product evaluation board (4-to-1, 650W) has been developed and demonstrated for the next-gen 48V bus conversion on data center server boards.
{"title":"Switched tank converters","authors":"Shuai Jiang, Chenhao Nan, Xin Li, C. Chung, M. Yazdani","doi":"10.1109/APEC.2018.8340992","DOIUrl":"https://doi.org/10.1109/APEC.2018.8340992","url":null,"abstract":"This paper presents a new class of Switched Tank Converters (abbreviated as STCs) for high efficiency high density non-isolated DC-DC application where large voltage step down (up) ratios are required. Distinguished from switched capacitor converters, the STCs uniquely employ LC resonant tanks to partially replace the flying capacitors for energy transfer. Full soft charging, soft switching and minimal device voltage stresses are achieved under all operating conditions. The STCs feature very high efficiency, density and robustness against component non-idealities over a wide range. Furthermore, thanks to the full resonant operation, multiple STCs can operate in parallel with inherent droop current sharing, offering the best scalability and control simplicity. These attributes of STC make it a disruptive and robust technology viable for industry's high volume adoption. A novel equivalent DCX building block principle is introduced to simplify the analysis of STC. A 98.92% efficiency STC product evaluation board (4-to-1, 650W) has been developed and demonstrated for the next-gen 48V bus conversion on data center server boards.","PeriodicalId":113756,"journal":{"name":"2018 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"202 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134240801","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 : 2018-03-04DOI: 10.1109/APEC.2018.8341186
Yongheng Yang, Keliang Zhou, F. Blaabjerg
A short period, called dead time, is usually implemented (e.g., through adding extra hardware in gate drivers or modifying pulse-width modulation schemes) for voltage source inverters to prevent shoot-through incidents. Clearly, larger dead time provides more safety, but may also degrade the injected currents from inverters. It thus requires sophisticated compensation schemes to meet certain stringent standards. For single-phase transformerless full-bridge PV inverters, different modulation schemes can be employed to suppress leakage currents, which in return may affect the distribution of the dead time harmonics. Thus, this drives the analysis of dead time harmonics in single-phase transformerless full-bridge inverters considering two modulation strategies: bipolar and unipolar modulation schemes. Effects of modulation on the dead time harmonics are observed in simulations and experimental tests. Furthermore, a periodic controller is adopted to mitigate the harmonics, which is independent of the modulation schemes.
{"title":"Analysis of dead-time harmonics in single-phase transformerless full-bridge PV inverters","authors":"Yongheng Yang, Keliang Zhou, F. Blaabjerg","doi":"10.1109/APEC.2018.8341186","DOIUrl":"https://doi.org/10.1109/APEC.2018.8341186","url":null,"abstract":"A short period, called dead time, is usually implemented (e.g., through adding extra hardware in gate drivers or modifying pulse-width modulation schemes) for voltage source inverters to prevent shoot-through incidents. Clearly, larger dead time provides more safety, but may also degrade the injected currents from inverters. It thus requires sophisticated compensation schemes to meet certain stringent standards. For single-phase transformerless full-bridge PV inverters, different modulation schemes can be employed to suppress leakage currents, which in return may affect the distribution of the dead time harmonics. Thus, this drives the analysis of dead time harmonics in single-phase transformerless full-bridge inverters considering two modulation strategies: bipolar and unipolar modulation schemes. Effects of modulation on the dead time harmonics are observed in simulations and experimental tests. Furthermore, a periodic controller is adopted to mitigate the harmonics, which is independent of the modulation schemes.","PeriodicalId":113756,"journal":{"name":"2018 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"127 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115624045","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 : 2018-03-04DOI: 10.1109/APEC.2018.8341050
M. Alhasheem, Ahmed Abdelhakim, T. Dragičević, L. Dalessandro, F. Blaabjerg
Finite control set model predictive control (FCS-MPC) methods in different power electronics application are gaining high attention due to their simplicity and fast dynamics. This paper introduces an experimental assessment of the two-level three-phase voltage source converter (2L-VSC) using two FCS-MPC algorithms. In order to perform such comparative evaluation, the 2L-VSC efficiency and total harmonics distortion voltage (THDv) have been measured where considering a linear load and non-linear load. The new algorithm gives better results than the conventional algorithm in terms of the THD and 2L-VSC efficiency. The results also demonstrate the performance of the system using carrier based pulse width modulation (CB-PWM). These findings have been validated for both linear and non-linear loads through experimental verification on 4 kW 2L-VSC prototype. It can be concluded that a comparable performance is achieved by using the conventional FCS-MPC, Improved FCS-MPC, and CB-PWM algorithms.
{"title":"Performance assessment of the VSC using two model predictive control schemes","authors":"M. Alhasheem, Ahmed Abdelhakim, T. Dragičević, L. Dalessandro, F. Blaabjerg","doi":"10.1109/APEC.2018.8341050","DOIUrl":"https://doi.org/10.1109/APEC.2018.8341050","url":null,"abstract":"Finite control set model predictive control (FCS-MPC) methods in different power electronics application are gaining high attention due to their simplicity and fast dynamics. This paper introduces an experimental assessment of the two-level three-phase voltage source converter (2L-VSC) using two FCS-MPC algorithms. In order to perform such comparative evaluation, the 2L-VSC efficiency and total harmonics distortion voltage (THDv) have been measured where considering a linear load and non-linear load. The new algorithm gives better results than the conventional algorithm in terms of the THD and 2L-VSC efficiency. The results also demonstrate the performance of the system using carrier based pulse width modulation (CB-PWM). These findings have been validated for both linear and non-linear loads through experimental verification on 4 kW 2L-VSC prototype. It can be concluded that a comparable performance is achieved by using the conventional FCS-MPC, Improved FCS-MPC, and CB-PWM algorithms.","PeriodicalId":113756,"journal":{"name":"2018 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115134271","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 : 2018-03-04DOI: 10.1109/APEC.2018.8341083
Brandon Regensburger, Sreyam Sinha, Ashish Kumar, J. Vance, Z. Popovic, K. Afridi
This paper introduces a high-performance kilowatt-scale large air-gap multi-modular capacitive wireless power transfer (WPT) system for electric vehicle (EV) charging. This multi-modular system achieves high power transfer while maintaining fringing electric fields within prescribed safety limits. The fringing fields are reduced using near-field phased-array field-focusing techniques, wherein the adjacent modules of the multi-modular system are out-phased with respect to one another. The inter-module interactions in this multi-modular system are modeled, and an approach to eliminate these interactions in a practical EV charging environment is proposed. A prototype 1.2-kW 6.78-MHz 12-cm air-gap multi-modular capacitive WPT system comprising two 600-W modules is designed, built and tested. This prototype system achieves 21.2 kW/m2 power transfer density and a peak efficiency of 89.8%. This multi-modular system also achieves a fringing field reduction of 50% compared to its individual modules.
{"title":"Kilowatt-scale large air-gap multi-modular capacitive wireless power transfer system for electric vehicle charging","authors":"Brandon Regensburger, Sreyam Sinha, Ashish Kumar, J. Vance, Z. Popovic, K. Afridi","doi":"10.1109/APEC.2018.8341083","DOIUrl":"https://doi.org/10.1109/APEC.2018.8341083","url":null,"abstract":"This paper introduces a high-performance kilowatt-scale large air-gap multi-modular capacitive wireless power transfer (WPT) system for electric vehicle (EV) charging. This multi-modular system achieves high power transfer while maintaining fringing electric fields within prescribed safety limits. The fringing fields are reduced using near-field phased-array field-focusing techniques, wherein the adjacent modules of the multi-modular system are out-phased with respect to one another. The inter-module interactions in this multi-modular system are modeled, and an approach to eliminate these interactions in a practical EV charging environment is proposed. A prototype 1.2-kW 6.78-MHz 12-cm air-gap multi-modular capacitive WPT system comprising two 600-W modules is designed, built and tested. This prototype system achieves 21.2 kW/m2 power transfer density and a peak efficiency of 89.8%. This multi-modular system also achieves a fringing field reduction of 50% compared to its individual modules.","PeriodicalId":113756,"journal":{"name":"2018 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122463664","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 : 2018-03-04DOI: 10.1109/APEC.2018.8341132
Xiaoying Lu, Yaojia Chen, Haoyu Wang
Battery/ultracapacitor (UC) hybrid energy management systems (HEMS) have been introduced into plug-in electric vehicles (PEVs), mainly to enhance the power density and energy density performances of the onboard energy storage systems. In HEMS, a control strategy is required to distribute power among different energy sources. In this paper, a novel real-time control strategy is proposed for use in PEV onboard HEMS. A cost function is formulated for each component of the HEMS to illustrate the respective loss. The entire problem is then rendered into a multi-objective optimization problem, which seeks to minimize those three cost functions. Weighted-sum method and no-preference method are employed to solve this optimization problem. The solved optimized strategy is implemented and simulated in Advanced VehIcle SimulatOR (ADVISOR) to validate the concept. Results show that the proposed real-time control strategy owns the advantages of prolonged lifetime of the battery, extended PEV driving distance and enhanced system response.
{"title":"Multi-objective optimization based real-time control for PEV hybrid energy management systems","authors":"Xiaoying Lu, Yaojia Chen, Haoyu Wang","doi":"10.1109/APEC.2018.8341132","DOIUrl":"https://doi.org/10.1109/APEC.2018.8341132","url":null,"abstract":"Battery/ultracapacitor (UC) hybrid energy management systems (HEMS) have been introduced into plug-in electric vehicles (PEVs), mainly to enhance the power density and energy density performances of the onboard energy storage systems. In HEMS, a control strategy is required to distribute power among different energy sources. In this paper, a novel real-time control strategy is proposed for use in PEV onboard HEMS. A cost function is formulated for each component of the HEMS to illustrate the respective loss. The entire problem is then rendered into a multi-objective optimization problem, which seeks to minimize those three cost functions. Weighted-sum method and no-preference method are employed to solve this optimization problem. The solved optimized strategy is implemented and simulated in Advanced VehIcle SimulatOR (ADVISOR) to validate the concept. Results show that the proposed real-time control strategy owns the advantages of prolonged lifetime of the battery, extended PEV driving distance and enhanced system response.","PeriodicalId":113756,"journal":{"name":"2018 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122508107","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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