Designing an On-board Charger to Efficiently Charge Multiple Electric Vehicles

• Published in: Chinese Journal of Electrical Engineering Vol. 9; no. 2; pp. 38 - 56
• Main Authors: Gupta, Jyoti, Maurya, Rakesh, Arya, Sabha Raj
• Format: Journal Article
• Language: English
• Published: Department of Electrical Engineering,Sardar Vallabhbhai National Institute of Technology,Surat 395007,India 01.06.2023
• Subjects: state of charge(SOC); single input dual output(SIDO); CV/CC; electric vehicles(EVs); power factor correction(PFC); Continuous conduction mode(CCM)
• ISSN: 2096-1529
• DOI: 10.23919/CJEE.2023.000019

An on-board charger for efficiently charging multiple battery-operated electric vehicles(EVs)is introduced.It has evolved as a single-input dual-output(SIDO)integrated boost-single ended primary inductor converter(SEPIC)fly-back converter,offering cost-effectiveness,reliability,and higher efficiency compared to conventional chargers with equivalent specifications.The proposed system includes an additional regulated output terminal,in addition to an existing terminal for charging the EV battery of a 4-wheeler,which can be used to charge another EV battery,preferably a 2-wheeler.With the aid of control techniques,unity power factor operations are obtained during constant-voltage(CV)/constant-current(CC)charging for the grid-to-vehicle(G2V)operating mode.Using mathematical modelling analysis,the proposed system is developed in a Matlab/Simulink environment,and the results are validated in a real-time simulator using dSPACE-1104.The proposed system is employed for charging the batteries of two EVs with capacities of 400 V,40 A·h and 48 V,52 A·h for the 4-wheeler and 2-wheeler,respectively.Its performance is investigated under different operating modes and over a wide range of supply voltage variations to ensure safe and reliable operation of the charger.