Electric vehicles (EV) are found to be a good alternative for the conventional internal combustion (IC) engine vehicles in transportation sector due to its various advantages. Now-a-days, wireless charging of EV battery is preferred among the various methods used for charging EV battery. In this paper, extensive review is carried out on various methods used for wireless charging of an EV battery. Different techniques used for transferring power in wireless mode to charge the EV battery are static EV charging technique and dynamic EV charging technique. Static wireless EV battery charging technique adopts inductive and capacitive method for transferring power whereas, dynamic wireless EV battery charging technique adopts only inductive method for transferring power. These techniques are discussed thoroughly in this paper and broad review is carried out with a focus on the compensation circuit topologies, types of core for magnetic coupled inductors, different converters and controllers used for wireless power transfer (WPT) system. Also, design aspects of an static wireless EV battery charging system along with its equivalent circuit analysis is presented in this paper. Challenges and future development in wireless charging of EV battery is also explained in this paper.

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 Abstract: The proposed system facilitates uninterruptable charging of a photovoltaic (PV) fed plug-in electric vehicle (EV) battery charging system irrespective of solar irradiation conditions by integrating utility grid to the battery charging system. The system employs bidirectional cycloconverter (BDCC) in order to use utility grid as source or sink during different modes of operation which depends on the availability of solar power. During low irradiation condition, the utility grid acts as a backup source in order to facilitate uninterruptable charging of the EV battery. When surplus power is generated from the PV panel, it is fed to the utility grid, which acts as sink in this mode. For uninterruptable EV battery charging, the controller operates the switches and relays in the proposed system corresponding to solar irradiation level. The available literatures define complex control strategies which are solved in this proposed system by adopting a simple dynamic control algorithm. The simulation of the proposed system has been carried out using PSIM simulation software and experimental prototype has been designed, developed and tested for different modes of operations to validate the efficacy of the proposed system.

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Utilizing L‐arginine as a fuel, Mg1‐xSrxFe2O4 (0 ≤ x ≤ 0.5) spinel nanoparticles were prepared by the microwave combustion process. Impact of Sr2+ ion substitution on structural, morphology, optical, thermal, and magnetic characteristics is investigated by following techniques such as X‐ray diffraction (XRD), HR‐SEM, energy dispersive X‐ray analysis (EDX), diffused reflectance spectroscopy‐Ultra Violet (DRS‐UV), TG‐DTA, and VSM. XRD ensures the formation of the cubic spinel structure, and the average crystallite size was determined utilizing the Debye Scherer equation, which was found to be lying between 33.10 and 24.11 nm. HR‐SEM images exhibited agglomerated morphology, and the samples were observed to be highly crystalline in nature. EDX spectra confirmed the formation of pure and strontium doped magnesium ferrite, ensuring the existence of all the elements. The bandgap was observed to lie in between 2.02 and 1.57 eV, respectively. TG‐DTA spectra provide information regarding the total weight loss, endothermic, and exothermic transitions. From M‐H loops, it is observed that pure and strontium doped magnesium ferrite exhibits ferromagnetic behavior.

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