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Abstract
In the present scenario of the fossil fuel crisis, a shift from conventional transportation to electric vehicles (EVs) is the goal, and it is necessary to make it economically feasible. Developing an efficient charger with mid-range power level may successfully resolve this problem. In this direction, an EV charging infrastructure has been proposed to achieve grid-to-vehicle (G2V) charging, with vehicle-to-grid (V2G) capability. In G2V mode, the proposed infrastructure consists of an on-board, single-phase, 7.7 kW totem pole converter in continuous conduction mode to achieve high-power factor correction (PFC). Additionally, instead of conventional Si power MOSFET, an SiC-based converter is introduced to lower the switching losses at high switching frequency with smaller filters. Using an SiC-based converter leads to increased efficiency (more than 98%) and reduced total harmonic distortion (less than 5%), making the system economical. Simultaneously, to make the system more economical, the proposed converter works as an inverter to feedback the power to the grid in V2G mode. Furthermore, to analyse the feasibility, the proposed infrastructure has been simulated and its performance is validated using the simpower tool in MATLAB/Simulink environment.
Highlights
In the fast-growing, emission-free transportation revolution, the participation of electric vehicles (EVs) has increased exponentially
In the proposed system, the second stage consists of a battery-side bidirectional (BSBD) DC-DC converter that operates in two modes, i.e., charging and discharging for G2V and V2G applications, respectively
To achieve the voltage level of batteries (Vbatt) at the output side, BSBD converter operates in buck mode with components as an inductor (Lbuck) and capacitor (Cbuck)
Summary
In the fast-growing, emission-free transportation revolution, the participation of electric vehicles (EVs) has increased exponentially. The optimal switching frequency will always depend on its use, whether it needs high density, efficiency, or both, whereas, in [43], authors have reported a bidirectional totem pole PFC with resonant dual active bridge converter using SiC WBG devices. The use of SiC WBG devices in bidirectional totem pole converter makes it more beneficial due to improved efficiency and power density. A CCM-control-based totem pole PFC offers simple structure with higher efficiency in bidirection mode to charge and discharge the EV batteries in G2V and V2G modes, respectively. Due to the use of SiC device, totem pole converter is capable of operating at the high switching frequency, which reduces the size of the interfacing inductor and achieve higher efficiency as well. In the charging mode, the calculation of design parameters for CCM totem pole PFC is presented as follows
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