This paper proposed a control system for the battery charger of a Solar vehicle. The battery charger has two parts, boost converter and isolated DC/AC/DC converter. The boost converter is controlled by a proposed control system based on sliding mode. In this controller, the MPPT is implemented by an extreme point of the Solar cell P-V curve. Also, the control system of the DC/AC/DC converter is based on sliding mode with consideration of uncertainties of the output filter. A fast charging algorithm based on variable frequencies was carried out by the presented control system and charging of a Lithium-ion battery was done during 20 min from SOC 20% to SOC 80%. The simulation results show control system effectiveness.

Solar powered electric vehicles (SPEVs) charge their energy storages from photovoltaic (PV) panels via on-board charger. The battery charger for these vehicles is mainly dependent on the DC-DC stage. Accordingly, this paper proposes an on-board battery charger utilizing a novel dual-output isolated DC-DC converter to charge battery and supercapacitor (SC) simultaneously. This topology uses impedance quasi-Z source network and also integrates both switched-capacitors and coupled-inductor techniques to achieve higher voltage gain ratio. Furthermore, compared to the traditional battery chargers, due to the use of only two switches, the number of components, the system size and the corresponding cost can be reduced. The results obtained by computer simulation demonstrate that the high voltage gain is obtained for both battery and SC ports at lower values of duty ratio with an efficiency of more than 94. 5%. Finally, experiments with a 150W prototype are demonstrated in the laboratory to investigate the performance and effectiveness of the proposed SPEVs charger.

Wireless rechargeable sensor networks (WRSNs) are widely used in many fields. However, the limited battery capacity of sensor nodes (SNs) prevents its development. To extend the battery life of SNs, they can be charged by a mobile charger (MC) equipped with radio frequency-based wireless power transfer (WPT). The paper addressed the issue of optimizing route planning and charging based on an MC with directional charging in on-demand networks. A mixed integer linear programming model (MILP) is proposed to obtain the appropriate stopping points (SPs) and orientation charging angles to respond to input requests in the shortest possible time and with minimum energy consumption. First, to select the SPs and the orientation charging direction, we utilize a clustering and discretization technique while minimizing the number of SPs and maximizing the charging cover. Then, to decrease the charging time of the required SNs as well as the MC's energy consumption, we propose a heuristic search algorithm for adjusting the moving path for the directional mobile charger. Finally, experimental simulations are performed to evaluate the performance of the proposed directional charging scheduling algorithm, and the results reveal that the suggested approach outperforms existing studies in terms of MC energy consumption, charging delay, and distance traveled.

Efficient and versatile charging solutions are essential for modern applications requiring portable energy systems. This paper presents a novel portable charger powered by an isolated split-core current clamp, enabling direct charging from power lines. The system utilizes inductive coupling to draw AC current from these lines, which is then regulated to a precise voltage for battery replenishment. The proposed design features an interleaved resonant topology with a semi-active rectifier, achieving high efficiency and adaptability to a wide range of input voltages. This architecture supports a variable DC bus voltage, enabling the resonant converter to operate optimally near its resonant frequency for maximum performance. To ensure a lightweight and efficient design, the converter eliminates traditional transformers, incorporating a capacitive element within the resonant network for galvanic isolation. A cascaded dual-control strategy in the interleaved structure ensures precise voltage regulation. Designed to be compatible with 1-6 cell Li-Ion batteries, the charger offers extensive versatility. Experimental results from a 2.5-200 W prototype, with an output voltage range of 4.2-25.2 V, demonstrate a peak efficiency of 94%, validating the effectiveness of the proposed charger for grid-connected applications.

This paper investigates a fundamental issue in AC-DC rectifiers that are specifically used as charger for electric vehicle (EV), i. e. the total harmonic distortion (THD) of input current waveforms. Firstly, the topology of two-stage charger along with the corresponding control scheme is reviewed. Then, the research gap namely high harmonic distortion of input current is identified and analyzed. A revision of the conventional control method with the aid of virtual resistant is proposed and investigated from the circuit perspectives. Finally, simulation results are delivered to validate the analysis and the reduction of THD in the input current waveform. this is proposed method, the steady state is studied.

Nowadays, because of the need to decrease fuel consumption and greenhouse gas emissions and also their capability of exchanging power with the grid and regulating the frequency and voltage of the grid at different times of the day, electric vehicles are used more than before all across the world. It is highly important to pay attention to the efficiency, and decrease in the weight and volume of these vehicles. The chargers of these vehicles can form a huge portion of the volume and weight of these vehicles. DC link capacitors are the large parts of these chargers. Based on the mathematical modeling and relationships of the system, this study focuses on the optimal capacitor value based on the required specifications. In the model presented in this article, the optimal value of DC link capacitor is estimated by taking into account instantaneous input power of the charger, the relationship of the energy balance between the grid and the DC link capacitor, and application of Taylor series to the output of the relationship. The optimal DC link capacitor value is estimated through calculating the DC link voltage, and measuring the exchanged energy and changes of DC Link Voltage during charging. The most considerable advantages of the proposed model are the simplicity of its design together with the minimum weight and volume of the charger due to its low capacitor value. SIMULINK environment of MATLAB software was used to evaluate the proposed model. The simulation results show that the model was successful.