Charging System Research Articles

Numerical study on comprehensive performances of pipe-embedded building envelope integrated with arc-finned heat charging system

In the context of accelerating toward carbon neutrality, building envelopes are gradually regarded as multifunctional units with structural and energy attributes. To address the capacity mismatch between heat injection and thermal diffusion processes that hinder performance improvement of pipe-embedded energy walls, the arc-finned pipe-embedded energy walls (i.e., Arc-finPEWs) with directional heat-charging capacity are put forward. Subsequently, a validated mathematical model is established to explore the transient thermal behaviors of Arc-finPEWs as well as the impacts of 7 key parameters on its energy-saving potentials. Results showed that the directional heat-charging measures could improve the heat-charging capacity in specified directions, and the enhancement effect was more obvious as pipe spacing increased. Besides, the fin number (FN), shank length (SL), and fin angle (FA) were the top three influencing parameters in auxiliary-heating mode, whereas impacts of FA, FN, and arc angle (AA) ranked the top three in load-reduction mode. Furthermore, a larger FN and SL contributed to reducing total primary energy consumption and creating more robust invisible thermal barriers in auxiliary-heating mode, while left-facing fins or SL settings that are too high or too low were unfavorable in load-reduction mode. Meanwhile, the arc-fin designs with SL=0.6, FA=150° and AA=30° in auxiliary-heating mode and FA=30°, SL≤0.4 and AA≤15° in load-reduction mode are suggested. Compared to conventional energy-saving walls, the proposed arc-finned heat-charging system could reduce physical thermal insulation material usage with high embodied carbon features by over 60 %.

Stabilizing effects of higher-order quantum corrections on charged BTZ black hole thermodynamics

In this paper, we study the thermodynamic properties and stability of static charged BTZ black holes with the inclusion of higher-order quantum corrections. The corrections to the entropy, mass, and Helmholtz free energy are derived, revealing the intricate interplay between quantum effects and classical gravitational forces in the context of black hole thermodynamics. The study of the specific heat capacity shows that higher-order corrections stabilize the system by removing the instabilities present at lower orders. The analysis of the van der Waals-like isotherms demonstrates the continuous transition from a highly compressible to an almost incompressible regime as the volume is decreased, akin to the behavior of supercritical fluids. Notably, the isotherms do not exhibit any regions of negative compressibility, indicating the absence of instabilities. Furthermore, the convexity of the Helmholtz free energy as a function of volume confirms the stability of the charged BTZ black hole system. These findings provide valuable insights into the complex thermodynamic landscape of three-dimensional black holes and the role of quantum corrections in shaping their behavior.

Design of wireless charging system for E-Vehicle

To address the dual problems of fuel reliance and air pollution, this study describes the design of a wireless ground to vehicle charging system powered by solar energy and specifically designed for electric vehicle (EV) charging stations. As the number of electric vehicles on the road steadily rises, they present a viable way to cut travel expenses by switching from conventional fuel to electricity, which is a more economical and sustainable option. With the introduction of a wireless EV charging system, this creative solution does away with the need for external power sources and permits continuous charging without interfering with driving. Utilizing solar power, the charging system incorporates solar panels, batteries, circuit regulators, boost converters, receiver and transmitter copper coils, AC/DC converters, microcontrollers (such as ATmega), LCD screens, and circuit regulators. This study describes a technique that shows that charging electric cars while driving is feasible and eliminates the need to stop. This technology for wireless solar electric vehicle charging presents a forward-thinking approach to sustainable mobility by providing a workable solution that can be easily included in the road infrastructure. For the wireless charging, in addition, various coil designs are suggested.

Advancements in electrical systems for E-bike battery charging: a technical examination of conventional and wireless power transfer technologies

Advancements in electrical systems for E-bike battery charging: a technical examination of conventional and wireless power transfer technologies

Evaluation of Various Home Charging Systems for Electrical Protection and Data Communications

Evaluation of Various Home Charging Systems for Electrical Protection and Data Communications

Low Consumption Monitoring and Estimation of the State of Charge System for a Hybrid Electric Vehicle

Low Consumption Monitoring and Estimation of the State of Charge System for a Hybrid Electric Vehicle

An Integrated Electric Vehicle Charging System of Wireless Power Transfer and Auxiliary Power Module With Shared Converter and Magnetic Coupler

An Integrated Electric Vehicle Charging System of Wireless Power Transfer and Auxiliary Power Module With Shared Converter and Magnetic Coupler

A Family of Self-Adaptive Interoperable Receivers Based on Multiple Decoupled Receiving Poles for Electric Vehicle Wireless Charging Systems

A Family of Self-Adaptive Interoperable Receivers Based on Multiple Decoupled Receiving Poles for Electric Vehicle Wireless Charging Systems

A new GaN-based converter design for electric vehicle charging system

A new GaN-based converter design for electric vehicle charging system

Analysis and Suppression of Static Electromagnetic Ripple Torque in Integrated On-Board Charging System With Rotor Position Error

Analysis and Suppression of Static Electromagnetic Ripple Torque in Integrated On-Board Charging System With Rotor Position Error

Study on Power System of EV Bus Depot Charging System and Prospect for Smart Charging Implementation

Study on Power System of EV Bus Depot Charging System and Prospect for Smart Charging Implementation

Observer-Based Finite-Time Disturbance Rejection Control for Dynamic Wireless Charging Systems With Constant Output Voltage Regulation

Observer-Based Finite-Time Disturbance Rejection Control for Dynamic Wireless Charging Systems With Constant Output Voltage Regulation

Modeling and prediction of conducted EMI in on-board charging system of electric vehicle

Modeling and prediction of conducted EMI in on-board charging system of electric vehicle

An Integration of Adaptive Control Techniques with Portable Solar-Powered EV Charging with Particle Swarm Optimization (PSO)

Abstract: This paper presents a novel approach utilizing Particle Swarm Optimization (PSO) for enhancing the efficiency of solar-powered electric vehicle (EV) charging systems. With the increasing adoption of EVs and the imperative to transition towards renewable energy sources, optimizing the utilization of solar power for charging becomes crucial. The proposed system integrates photovoltaic (PV) panels to harness solar energy, providing a sustainable and renewable power source for EV charging. The key innovation lies in the application of PSO, a nature-inspired optimization algorithm, to dynamically adjust charging parameters based on real-time environmental conditions, grid electricity prices, and EV battery requirements. PSO offers a robust and efficient method for solving optimization problems by simulating the behavior of swarms in nature. In the context of solar-powered EV charging, the PSO algorithm iteratively adjusts charging rates and schedules to maximize solar energy utilization, minimize charging costs, and ensure optimal battery health. The integration of PSO optimization with solarpowered EV charging represents a promising step towards achieving sustainable and intelligent transportation solutions. Future research directions may include further optimization refinements, scalability studies, and real-world deployment to validate the practicality and effectiveness of the proposed approach in diverse environments and usage scenarios.

The mean field limit for the Vlasov–Poisson system with a point charge

In this paper, we are concerned with the validity problem for the repulsive Vlasov–Poisson system when the initial datum is the sum of a diffuse density and a point charge in the three dimensional space. Our result leads to a derivation of this system from the regularized microscopic N-plasma particle and one point charge system when the Coulomb force between plasma particles needs to be modified with the modified size N − 1 3 + ϵ while the Coulomb force between plasma and point charge does not need to be modified. More precisely, we obtain the convergence rate between the empirical measure associated to the regularized particle system and the solution of the Vlasov–Poisson system with a point charge in terms of the Wasserstein distance.

A hybrid YDSE - THDCNN approach based multi objective optimization of energy management for renewable energy sources with electric vehicles

Thermal power plants have long been essential to the fossil fuel-based electricity supply chain, according to statistics studies. Nevertheless, due to the enormous initial and ongoing expenses of modern power plants as well as their negative environmental effects. This manuscript proposes a hybrid technique for grid-connected load-following hybrid photovoltaic and wind microgrid with a grid-connected electric vehicle charging system. The proposed hybrid technique is the joint execution of both Young's double-slit experiment optimizer (YDSE) and the Tree Hierarchical Deep Convolutional Neural Network (THDCNN). Hence, it is named as YDSE-THDCNN. The major objective of the proposed technique is to reduce the fuel, operation, and maintenance costs, as well as to reduce the environmental costs and maximize the efficiency of the system. The proposed YDSE technique is utilized to generate the control signal of the inverter and the optimal signal will be predicted by the THDCNN. By then, the MATLAB working platform has adopted the proposed way, and the existing method is used to compute its execution. The proposed method outperforms any existing techniques, including the Genetic Algorithm (GA), Butterfly Optimization Algorithm (BOA), and Particle Swarm Optimization (PSO) Algorithm. The existing method shows the cost of 2.6$, 3.8$, 4.6$, and the proposed method shows the cost of 1.3$ which is lower than the other existing method.

Mechanistic Analysis of Reflective Cracking Potential in Electrified Pavement with Inductive Charging System.

Electrified pavements with inductive charging systems provide an innovative way of providing continuous wireless power transfer to electric vehicles (EVs). Electrified pavements have unique construction methods, resulting in different mechanical and thermodynamic characteristics from traditional pavements. This study aimed to investigate the mechanistic design of electrified pavements to mitigate thermal-induced reflective cracking due to the inclusion of concrete slabs with inductive charging units (CUs) under an asphalt surface layer. Finite element (FE) models were developed to analyze the temperature profiles, pavement responses, and crack potential in electrified pavements. The fatigue model and Paris' law were utilized to evaluate crack initiation and propagation for different pavement designs. Within the allowable range for sufficient wireless charging efficiency, increasing the surface layer thickness had a noticeable benefit on mitigating crack initiation and propagation. The results indicate that increasing the asphalt surface layer thickness by 20 mm can delay crack initiation and propagation, resulting in a two to threefold increase in the number of cycles needed to reach the same crack length. Reflective cracking can also be retarded by the optimized design of the charging unit. Increasing the concrete slab thickness from 100 mm to 180 mm resulted in an approximately 20% increase in the number of cycles to reach the same crack length. Reducing the slab width and length (shortening joint spacing) could also effectively reduce the reflective cracking potential, with the slab length having a more significant influence. These findings highlight the importance of balancing charging efficiency and structural durability in the design of electrified pavements.

Enhancing Transient Response in a DC-DC Converter for Electric Vehicle DC Fast Charging Applications Using Fractional-Order PI Control

DC fast charging is critical for the widespread adoption of electric vehicles (EVs) due to its impact on convenience, economics, and environmental sustainability. Due to the critical role of DC fast charging in EV adoption, improving its efficiency and performance is paramount. This paper presents a Fractional-Order PI (FOPI) controller for obtaining a well-regulated output voltage of a Dual Active Bridge (DAB) converter, a widely used topology in EV applications. The proposed FOPI is validated to the conventional PI controller in a simulated DAB model that is relevant to DC fast charging applications. The evaluation is performed, and various time-domain parameters and performance indices to evaluate the dynamic response of the model are considered. The results are expected to demonstrate significant improvement in the converter’s transient and steady-state response using the proposed FOPI controller compared to the conventional PI controller, contributing to a more efficient and robust DC fast charging system. This improvement can translate to faster charging times, better stability, and potentially reduced stress on the EV battery during DC fast charging.

Power stabilization control of wireless charging system based on LCL‐P compensation structure

AbstractTo enhance the stabilizing function and boost the output power of the inductive coupling power transfer (ICPT) system, a power stabilization control method based on LCL‐P resonance compensation for a wireless energy transmission system is proposed. “L” represents inductance, “C” represents capacitance, “LCL” refers to the primary‐side compensation structure, and “P” indicates that the secondary side is compensated in parallel . Firstly, this paper synthesizes the modeling principle of the gyrator equivalent model of the resonant circuit and coupled inductor, graphically analyzes the resonant compensation structure, and derives the circuit characteristics of the LCL‐P compensation structure. Then, this paper proposes an improved control strategy for the Maximum Power Point Tracking (MPPT) algorithm to dynamically track the output power and thus obtain the optimal operating point through frequency conversion. Lastly, using MATLAB/Simulink software to build the simulation model of the wireless charging system through parameter design, the impact of the conventional DC/DC power control method is contrasted with the algorithmic control suggested in this paper. The results demonstrate that: the device can realize power transfer of 2.7 KW level, the energy transfer efficiency reaches more than 90%, the inverter realizes soft‐switching operation, and the improved MPPT algorithmic control strategy proposed in this paper is utilized to achieve better closed‐loop control of the system. The excellent characteristics of the LCL‐P compensation structure in high‐power transmission applications, as well as the correctness and feasibility of the control algorithm proposed in this paper, are demonstrated through simulation and practical experiments. This is a significant step towards improving the wide‐range adaptation of the wireless charging system, which is based on the LCL‐P resonance compensation to the changes in the load and coupling.

Frequency optimization of the AUV wireless charging system for minimum energy dissipation

With the growing demand for ocean exploration, research on docking technology is gaining popularity, resulting in the development of various types of docking systems. In contrast to traditional cable-based systems, this paper introduces a self-powered docking system designed for AUV recovery and recharging. To minimize energy loss in the self-powered system, an analysis of eddy current loss produced by the coils in the seawater is conducted, and a calculation method for determining the equivalent eddy current impedance is proposed. This allows for the transformation of energy loss analysis from the magnetic field to circuit analysis. Then the efficiency of the inductively coupled power transmission system in seawater is analyzed, and a frequency optimization method is proposed to minimize dissipated energy during the AUV battery charging process. Finally, the effectiveness of the frequency optimization method is validated through laboratory experiments. Moreover, the results of the sea trial confirm the feasibility of the optimal wireless charging system operating in a seawater environment.