A Single-Stage Electrolytic Capacitor-Less EV Charger With Single- and Three-Phase Compatibility

Kim, Hyungjin; Park, Junyeong; Kim, Sun-Ju; Hakim, Ramadhan Muhammad; Belkamel, Hamza; Choi, Sewan

doi:10.1109/tpel.2021.3127010

Cited by 33 publications

(2 citation statements)

References 35 publications

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“…A single-phase isolated totem-pole ZVS converter for bidirectional on-board charging, with a peak efficiency of 96.7% in the G2V mode, and 96.2% in the V2G mode is proposed in [126]. This work is also further extended to both single-phase and three-phase operation in [127].…”

Section: A Pfc and Isolated Dc-dc Converter Stage Integrationmentioning

confidence: 99%

On-Board Chargers for High-Voltage Electric Vehicle Powertrains: Future Trends and Challenges

Pradhan

Keshmiri

Emadi

2023

IEEE Open J. Power Electron.

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The powertrain voltages in battery electric vehicles (BEVs) have witnessed an upward trend due to advantages such as reduced runtime losses and extremely high DC fast charging power levels; aiding in reduced range anxiety and lower battery charging duration. This trend requires original equipment manufacturers (OEMs) to re-assess the design of electronic sub-assemblies (ESAs). Due to newly released DC fast charging standards, there are implications on the on-board charger (OBC), which is one of the ESAs in a BEV. This paper performs a comprehensive review of identifying system-level and use-case related challenges in transitioning on-board chargers to higher voltages compared to state-of-the-art, while considering the impact of newly introduced DC fast charging standards like Megawatt Charging Systems (MCS) and ChaoJi/ CHAdeMO 3.0. The existing research in academia and proof-of-concept designs compatible for high-voltage on-board charging sub-systems, such as the power factor correction (PFC) and isolated DC-DC conversion stages is consolidated. Due to the demand for integration driven by costoptimization targets, single-stage, traction-integrated, and auxiliary power unit (APU) integrated on-board chargers are discussed. Finally, the disparity between state-of-the-art technology and future requirements is defined to establish challenges and the direction of future research areas.

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Section: A Pfc and Isolated Dc-dc Converter Stage Integrationmentioning

confidence: 99%

On-Board Chargers for High-Voltage Electric Vehicle Powertrains: Future Trends and Challenges

Pradhan

Keshmiri

Emadi

2023

IEEE Open J. Power Electron.

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“…Alternatively, as in sum the instantaneous grid input power is constant, the pulsating input power can be redistributed by the subsequent isolated dc-dc converter stages (see Fig. 3(a)) as investigated in [14], [15], [23]. This approach, however, comes at the cost of elevated component stresses and conversion losses of the dc-dc converters and ideally the power pulsation is already reduced in the acdc front-ends.…”

Section: Introductionmentioning

confidence: 99%

Third-Harmonic-Type Modulation Minimizing the DC-Link Energy Storage Requirement of Isolated Phase-Modular Three-Phase PFC Rectifier Systems

et al. 2023

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A three-phase ac/dc converter with high-frequency isolation can be realized as a monolithic three-phase or as a phase-modular system by combining three single-phase Power Factor Correction (PFC) rectifier modules with individual isolated dc-dc converters. Advantageously, for a phase-modular system the module configuration can be changed depending on the instantaneous input-output voltage ratio (i.e., a star-(Y)-or a delta-(∆)-arrangement such that wide voltage ranges can be covered without a massive over-dimensioning of the main power components. However, the main disadvantage of a phase-modular converter realization is the fact that the input power of each PFC rectifier module pulsates at twice the mains frequency (which is inherent to single-phase power conversion) such that large dc-link capacitors are required. Recent literature predicts a substantial power pulsation reduction enabled by means of third-(3 rd )harmonic injection modulation which is applicable for the Y-connection (where a common-mode (CM) / zero-sequence (ZS) voltage is injected), and for the ∆-connection of the three single-phase PFC rectifier modules (where a CM / ZS current is injected). This changes the distribution of the power flow in the three-phase system and the power pulsation is shifted to higher frequencies. This paper experimentally verifies and extends the dc-link energy storage requirement reduction of the 3 rd -harmonic injection modulation concept: In a first step, the derivation of the harmonic injection concept is recapitulated and suitable control methods are discussed for both CM voltage (Y-arrangement) and CM current (∆-arrangement) injection. Further, an alternative CM voltage injection strategy with simplified reference generation based only on the instantaneous grid voltage measurements is presented and compared to the pure 3 rd -harmonic injection modulation. Measurement results obtained from a 6 kW prototype reveal a dc-link voltage variation and/or energy buffering reduction by up to 38.6 % enabled by the harmonic injection modulation compared to conventional operation without 3 rd -harmonic injection modulation.

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Single-phase and three-phase compatible isolated on-board charging system

Zhou,

Zhang,

Chen

2024

J. Power Electron.

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A Single-Stage Electrolytic Capacitor-Less EV Charger With Single- and Three-Phase Compatibility

Cited by 33 publications

References 35 publications

On-Board Chargers for High-Voltage Electric Vehicle Powertrains: Future Trends and Challenges

On-Board Chargers for High-Voltage Electric Vehicle Powertrains: Future Trends and Challenges

Third-Harmonic-Type Modulation Minimizing the DC-Link Energy Storage Requirement of Isolated Phase-Modular Three-Phase PFC Rectifier Systems

Single-phase and three-phase compatible isolated on-board charging system

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