Full Digital Control of an All-Si On-Board Charger Operating in Discontinuous Conduction Mode
This paper deals with the design, tuning and implementation of a digital controller for an all-Si electric vehicle (EV) on-board battery charger operated in discontinuous conduction mode (DCM). This charger consists of two cascaded conversion stages: a front-end power factor corrector (PFC) with two...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-01-01
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| Series: | Electronics |
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| Online Access: | https://www.mdpi.com/2079-9292/10/2/203 |
| _version_ | 1797410640995811328 |
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| author | Davide Cittanti Matteo Gregorio Fabio Mandrile Radu Bojoi |
| author_facet | Davide Cittanti Matteo Gregorio Fabio Mandrile Radu Bojoi |
| author_sort | Davide Cittanti |
| collection | DOAJ |
| description | This paper deals with the design, tuning and implementation of a digital controller for an all-Si electric vehicle (EV) on-board battery charger operated in discontinuous conduction mode (DCM). This charger consists of two cascaded conversion stages: a front-end power factor corrector (PFC) with two interleaved legs and an isolated phase-shifted full bridge DC/DC converter. Both stages operate in DCM over the complete battery charging power range, allowing lower inductance values for both the PFC and the DC/DC filtering elements. Moreover, DCM operation ensures a large reduction of the reverse-recovery losses in the power diodes, enabling the adoption of relatively cheap Si devices. The main goal of the work is to address the well-known DCM control challenges, leveraging a novel control strategy for both converter stages. This control scheme counteracts the DCM system non-linearities with a proper feed-forward contribution and an open-loop gain adjustment, ensuring consistent dynamical performance over the complete operating range. The designed controllers are tuned analytically, taking into account the delay components related to the digital implementation. Finally, the proposed control strategy is implemented on a single general purpose microcontroller unit (MCU) and its performance is experimentally validated on a 3.3 kW battery charger prototype. |
| first_indexed | 2024-03-09T04:33:08Z |
| format | Article |
| id | doaj.art-95c4191f8fdc45cc966e16b9e9995cbe |
| institution | Directory Open Access Journal |
| issn | 2079-9292 |
| language | English |
| last_indexed | 2024-03-09T04:33:08Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Electronics |
| spelling | doaj.art-95c4191f8fdc45cc966e16b9e9995cbe2023-12-03T13:33:30ZengMDPI AGElectronics2079-92922021-01-0110220310.3390/electronics10020203Full Digital Control of an All-Si On-Board Charger Operating in Discontinuous Conduction ModeDavide Cittanti0Matteo Gregorio1Fabio Mandrile2Radu Bojoi3Energy Department “Galileo Ferraris”, Politecnico di Torino, 10129 Torino, ItalyEnergy Department “Galileo Ferraris”, Politecnico di Torino, 10129 Torino, ItalyEnergy Department “Galileo Ferraris”, Politecnico di Torino, 10129 Torino, ItalyEnergy Department “Galileo Ferraris”, Politecnico di Torino, 10129 Torino, ItalyThis paper deals with the design, tuning and implementation of a digital controller for an all-Si electric vehicle (EV) on-board battery charger operated in discontinuous conduction mode (DCM). This charger consists of two cascaded conversion stages: a front-end power factor corrector (PFC) with two interleaved legs and an isolated phase-shifted full bridge DC/DC converter. Both stages operate in DCM over the complete battery charging power range, allowing lower inductance values for both the PFC and the DC/DC filtering elements. Moreover, DCM operation ensures a large reduction of the reverse-recovery losses in the power diodes, enabling the adoption of relatively cheap Si devices. The main goal of the work is to address the well-known DCM control challenges, leveraging a novel control strategy for both converter stages. This control scheme counteracts the DCM system non-linearities with a proper feed-forward contribution and an open-loop gain adjustment, ensuring consistent dynamical performance over the complete operating range. The designed controllers are tuned analytically, taking into account the delay components related to the digital implementation. Finally, the proposed control strategy is implemented on a single general purpose microcontroller unit (MCU) and its performance is experimentally validated on a 3.3 kW battery charger prototype.https://www.mdpi.com/2079-9292/10/2/203digital controlon-board charger (OBC)discontinuous conduction mode (DCM)power factor corrector (PFC)interleaved boost converterisolated DC/DC |
| spellingShingle | Davide Cittanti Matteo Gregorio Fabio Mandrile Radu Bojoi Full Digital Control of an All-Si On-Board Charger Operating in Discontinuous Conduction Mode Electronics digital control on-board charger (OBC) discontinuous conduction mode (DCM) power factor corrector (PFC) interleaved boost converter isolated DC/DC |
| title | Full Digital Control of an All-Si On-Board Charger Operating in Discontinuous Conduction Mode |
| title_full | Full Digital Control of an All-Si On-Board Charger Operating in Discontinuous Conduction Mode |
| title_fullStr | Full Digital Control of an All-Si On-Board Charger Operating in Discontinuous Conduction Mode |
| title_full_unstemmed | Full Digital Control of an All-Si On-Board Charger Operating in Discontinuous Conduction Mode |
| title_short | Full Digital Control of an All-Si On-Board Charger Operating in Discontinuous Conduction Mode |
| title_sort | full digital control of an all si on board charger operating in discontinuous conduction mode |
| topic | digital control on-board charger (OBC) discontinuous conduction mode (DCM) power factor corrector (PFC) interleaved boost converter isolated DC/DC |
| url | https://www.mdpi.com/2079-9292/10/2/203 |
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