A Single-Stage Bridgeless PFC Charger with Enhanced Power Quality for LEV-Mounted Solar PV Panels

The suggested single-stage bridgeless PFC charger successfully improves the charging performance of Light Electric Vehicles (LEVs) by combining high-efficiency power conversion and better power quality. The elimination of the typical diode bridge minimises conduction losses, therefore improving the total efficiency. The inbuilt Power Factor Correction enables the charger to achieve a power factor near to unity and current THD within international norms. The addition of the solar PV panel allows the battery to draw renewable energy, thus decreasing the dependency on the utility grid and cutting running expenses. To conclude, the suggested system offers a small, efficient, environment friendly and dependable charging option for future generation electric mobility. In this a grid and PV panel interfaced charger for LEV is developed which has the merit of enhanced PQ of grid current. Both sources provide dc output power. Both can be used at the same time or independently. Small signal analysis is done for analysing the frequency response of the planned charger which is further validated by ac-sweep in PSIM. It enhances ac current PQ and PV panel input MPPT in the steady state as well as dynamic operational settings. Each source shares few components so that the total number of components is reduced. There is no need for a big filter as each input has an inductor. Another advantage of the charger layout compared to standard topologies is the improvement in THD of the grid current in dual input operation. In this case, the addition of PV panel improves the voltage profile of common intermediate capacitor between two sources, and minimises the THD. The operation of the provided topology is verified on a 500-W laboratory prototype under steady state and several dynamic circumstances.

[1] T.-T. Le, R. M. Hakim, and S. Choi, “A high-efficiency bidirectionalsingle-stage AC–DC converter under wide voltage range for fast chargers,” IEEE Trans. Power Electron., vol. 38, no. 4, pp. 4945–4956, Apr. 2023.  [2] H. Nazi, E. Babaei, S. Tohidi, and M. Liserre, “An isolated SRC-based single phase single stage battery charger for electric vehicles,” IEEE Trans. Transport. Electrific., vol. 9, no. 1, pp. 1252–1262, Mar. 2023. Authorized licensed use limited to: Indian Institute of Technology Hyderabad. Downloaded on March 05,2025 at 06:11:40 UTC from IEEE Xplore. Restrictions apply. KUMAR AND SINGH: SINGLE-STAGE BRIDGELESS PFC CHARGER WITH ENHANCED POWER QUALITY 619  [3] H. Kim, J. Park, S. Kim, R. M. Hakim, H. Belkamel, and S. Choi, “A single-stage electrolytic capacitor-less EV charger with single- and three-phase compatibility,” IEEE Trans. Power Electron., vol. 37, no. 6, pp. 6780–6791, Jun. 2022. [4] B. Vardani and N. R. Tummuru, “A single-stage bidirectional inductive power transfer system with closed-loop current control strategy,” IEEE Trans. Transport. Electrific., vol. 6, no. 3, pp. 948–957, Sep. 2020.  [5] S. R. Meher and R. K. Singh, “A standard two stage on-board charger with single controlled PWM and minimum switch count,” IEEE Trans.Ind. Appl., vol. 59, no. 4, pp. 4628–4639, Jul./Aug. 2023.  [6] A. Singh, J. Gupta, and B. Singh, “Design and control of two stage battery charger for low voltage electric vehicles using high gain buck-boost PFC AC–DC converter,” IEEE Trans. Ind. Appl., vol. 59, no. 5, pp. 6125–6135, Sep./Oct. 2023.  [7] M. Tong, M. Cheng, S. Wang, and W. Hua, “An on-board two-stage integrated fast battery charger for EVs based on a five-phase hybrid excitation flux-switching machine,” IEEE Trans. Ind. Electron., vol. 68, no. 2, pp. 1780–1790, Feb. 2021.  [8] C.-Y. Oh, D.-H. Kim, D.-G. Woo,W.-Y. Sung, Y.-S. Kim, and B.-K. Lee, “A high-efficient non isolated single-stage on-board battery charger for electric vehicles,” IEEE Trans. Power Electron., vol. 28, no. 12,pp. 5746–5757, Dec. 2013.