Charging Strategy of Integrated Onboard EV Charger with Small Intermediate Capacitor
The purpose of this paper is to investigate charging strategies for integrated electrolytic capacitorless onboard chargers (OBC) in electric vehicles (EVs). An integrated OBC shares power converters and inductance with the traction system. An electrolytic capacitor is avoided in DC link of this inte...
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| Language: | English |
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China electric power research institute
2025-01-01
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| Series: | CSEE Journal of Power and Energy Systems |
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| Online Access: | https://ieeexplore.ieee.org/document/10026210/ |
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| author | Shuai You Zheng Wang Yuxing Sun |
| author_facet | Shuai You Zheng Wang Yuxing Sun |
| author_sort | Shuai You |
| collection | DOAJ |
| description | The purpose of this paper is to investigate charging strategies for integrated electrolytic capacitorless onboard chargers (OBC) in electric vehicles (EVs). An integrated OBC shares power converters and inductance with the traction system. An electrolytic capacitor is avoided in DC link of this integrated OBC. Thus, volume is reduced and reliability is improved for the power conversion system. In this paper, a charging strategy is proposed for this integrated system with uncontrolled rectification, where active switches are kept off in the power inverter on machine side. Consequently, a virtual DC-link voltage is with a half-wave shape. An extended phase-shift (EPS) operation is proposed for high-frequency DC/DC converters with this charging strategy, respectively. By designing a dedicated modulation and control strategy, sinusoidal charging power and the satisfied grid current are achieved for the system. Both theoretical analysis of operation modes and experimental verification with laboratory prototypes have been presented for the proposed charging strategy. |
| format | Article |
| id | doaj-art-b3d08e49eeea45dab7c05ab0179f9336 |
| institution | DOAJ |
| issn | 2096-0042 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | China electric power research institute |
| record_format | Article |
| series | CSEE Journal of Power and Energy Systems |
| spelling | doaj-art-b3d08e49eeea45dab7c05ab0179f93362025-08-20T03:02:54ZengChina electric power research instituteCSEE Journal of Power and Energy Systems2096-00422025-01-011141810181910.17775/CSEEJPES.2021.0470010026210Charging Strategy of Integrated Onboard EV Charger with Small Intermediate CapacitorShuai You0Zheng Wang1Yuxing Sun2School of Electrical Engineering, Southeast University,Nanjing,China,210096School of Electrical Engineering, Southeast University,Nanjing,China,210096School of Electrical Engineering, Southeast University,Nanjing,China,210096The purpose of this paper is to investigate charging strategies for integrated electrolytic capacitorless onboard chargers (OBC) in electric vehicles (EVs). An integrated OBC shares power converters and inductance with the traction system. An electrolytic capacitor is avoided in DC link of this integrated OBC. Thus, volume is reduced and reliability is improved for the power conversion system. In this paper, a charging strategy is proposed for this integrated system with uncontrolled rectification, where active switches are kept off in the power inverter on machine side. Consequently, a virtual DC-link voltage is with a half-wave shape. An extended phase-shift (EPS) operation is proposed for high-frequency DC/DC converters with this charging strategy, respectively. By designing a dedicated modulation and control strategy, sinusoidal charging power and the satisfied grid current are achieved for the system. Both theoretical analysis of operation modes and experimental verification with laboratory prototypes have been presented for the proposed charging strategy.https://ieeexplore.ieee.org/document/10026210/Electric vehicleselectrolytic capacitorless power conversiononboard chargersinusoidal charginguncontrolled rectification |
| spellingShingle | Shuai You Zheng Wang Yuxing Sun Charging Strategy of Integrated Onboard EV Charger with Small Intermediate Capacitor CSEE Journal of Power and Energy Systems Electric vehicles electrolytic capacitorless power conversion onboard charger sinusoidal charging uncontrolled rectification |
| title | Charging Strategy of Integrated Onboard EV Charger with Small Intermediate Capacitor |
| title_full | Charging Strategy of Integrated Onboard EV Charger with Small Intermediate Capacitor |
| title_fullStr | Charging Strategy of Integrated Onboard EV Charger with Small Intermediate Capacitor |
| title_full_unstemmed | Charging Strategy of Integrated Onboard EV Charger with Small Intermediate Capacitor |
| title_short | Charging Strategy of Integrated Onboard EV Charger with Small Intermediate Capacitor |
| title_sort | charging strategy of integrated onboard ev charger with small intermediate capacitor |
| topic | Electric vehicles electrolytic capacitorless power conversion onboard charger sinusoidal charging uncontrolled rectification |
| url | https://ieeexplore.ieee.org/document/10026210/ |
| work_keys_str_mv | AT shuaiyou chargingstrategyofintegratedonboardevchargerwithsmallintermediatecapacitor AT zhengwang chargingstrategyofintegratedonboardevchargerwithsmallintermediatecapacitor AT yuxingsun chargingstrategyofintegratedonboardevchargerwithsmallintermediatecapacitor |