Maximum Power Transfer of Wireless Charging System Using a Data-Based Approach

2021 ◽  
Author(s):  
Balaji Sriram ◽  
Sanjeevikumar Padmanaban ◽  
Vidhya Sagar Devendran ◽  
Sharmeela Chenniappan ◽  
Elango Sundaram
Keyword(s):  
Maximum Power ◽  
Wireless Charging ◽  
Power Transfer ◽  
Charging System

Selection of maximum power transfer region for resonant inductively coupled wireless charging system

2018 ◽  
Vol 84 ◽  
pp. 84-92 ◽  
Author(s):  
Durga P. Kar ◽  
Sushree S. Biswal ◽  
Pradyumna K. Sahoo ◽  
Praveen P. Nayak ◽  
Satyanarayan Bhuyan
Keyword(s):  
Maximum Power ◽  
Wireless Charging ◽  
Power Transfer ◽  
Inductively Coupled ◽  
Charging System ◽  
Transfer Region ◽  
Selection Of

scholarly journals Design of a wireless power transfer system for assisted living applications

2019 ◽  
Vol 6 (1) ◽  
pp. 41-56 ◽  
Author(s):  
Qassim S. Abdullahi ◽  
Rahil Joshi ◽  
Symon K. Podilchak ◽  
Sadeque R. Khan ◽  
Meixuan Chen ◽  
...  
Keyword(s):  
Assisted Living ◽  
Performance Indicator ◽  
The Elderly ◽  
Consumer Electronics ◽  
Electronic Systems ◽  
Wireless Charging ◽  
Power Transfer ◽  
Electronic Textiles ◽  
Wireless Power ◽  
Charging System

Advances in material science and semiconductor technology have enabled a variety of inventions to be implemented in electronic systems and devices used in the medical, telecommunications, and consumer electronics sectors. In this paper, a wireless charging system is described as a wearable body heater that uses a chair as a transmitter (Tx). This system incorporates the widely accepted Qi wireless charging standard. Alignment conditions of a linear three-element coil arrangement and a 3 × 3 coil matrix array are investigated using voltage induced in a coil as a performance indicator. The efficiency obtained is demonstrated to be up to 80% for a voltage of over 6.5 Volts and a power transfer of over 5 Watts. Our results and proposed approach can be useful for many applications. This is because the wireless charging system described herein can help design seating areas for the elderly and disabled, commercial systems, consumer electronics, medical devices, electronic textiles (e-textiles), and other electronic systems and devices.

scholarly journals Efficient wireless charging system for supercapacitor-based electric vehicle using inductive coupling power transfer technique

2019 ◽  
Vol 11 (11) ◽  
pp. 168781401988696
Author(s):  
Ahsan Elahi ◽  
Arslan Ahmed Amin ◽  
Umar Tabraiz Shami ◽  
Muhammad Tayyab Usman ◽  
Muhammad Sajid Iqbal
Keyword(s):  
Electric Vehicle ◽  
Inductive Coupling ◽  
Wireless Charging ◽  
Power Transfer ◽  
Charging System ◽  
Energy Demands ◽  
Experimental Implementation ◽  
Power Transfer Efficiency ◽  
The Cost ◽  
Mathematical Relationships

Wireless charging has become an emerging challenge to reduce the cost of a conventional plug-in charging system in electric vehicles especially for supercapacitors that are utilized for quick charging and low-energy demands. In this article, the design of an efficient wireless power transfer system has been presented using resonant inductive coupling technique for supercapacitor-based electric vehicle. Mathematical analysis, simulation, and experimental implementation of the proposed charging system have been carried out. Simulations of various parts of the systems are carried out in two different software, ANSYS MAXWELL and MATLAB. ANSYS MAXWELL has been used to calculate the various parameters for the transmitter and receiver coils such as self-inductance ( L), mutual inductance ( M), coupling coefficient ( K), and magnetic flux magnitude ( B). MATLAB has been utilized to calculate output power and efficiency of the proposed system using the mathematical relationships of these parameters. The experimental setup is made with supercapacitor banks, electric vehicle, wattmeters, controller, and frequency generator to verify the simulation results. The results show that the proposed technique has better power transfer efficiency of more than 75% and higher power transfer density using a smaller coil size with a bigger gap of 4–24 cm.

scholarly journals Design and Optimization of Coupling Coils for Bidirectional Wireless Charging System of Unmanned Aerial Vehicle

Electronics ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1964
Author(s):  
Yang Li ◽  
Xin Ni ◽  
Jiaming Liu ◽  
Rui Wang ◽  
Jingnan Ma ◽  
...  
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Lightweight Design ◽  
Wireless Charging ◽  
Power Transfer ◽  
Design And Optimization ◽  
Charging System ◽  
Transmission Distance ◽  
System A ◽  
Power Transfer Efficiency ◽  
Aerial Vehicle

To solve the battery power supply problem with wireless sensor networks (WSNs), a novel bidirectional wireless charging system is proposed, in which an unmanned aerial vehicle (UAV) can fly to the WSNs to charge sensors through high-frequency wireless power transfer (WPT) and also obtain energy for its own battery in the same way. To improve the performance of the UAV bidirectional wireless charging system, a lightweight design is adopted to increase its loading capacity and working time. Moreover, the radii and the numbers of turns and pitches of coupling coils were designed and optimized on the basis of simulations and experiments. Experimental results show that the weight of optimized UAV coil was reduced by 34.45%. The power transfer efficiency (PTE) of the UAV coil to sensor coil increased from 60.2% to 74.4% at a transmission distance of 15 cm, while that of the ground transmitting coil to UAV coil increased from 65.2% to 90.1% at 10 cm.

scholarly journals Effect of Coil Structure on the Efficiency of Wireless Power Transfer System

2019 ◽  
Vol 9 (2) ◽  
pp. 3387-3392
Keyword(s):  
Wireless Power Transfer ◽  
Receiver Coil ◽  
Transfer System ◽  
Wireless Charging ◽  
Power Transfer ◽  
Wireless Power ◽  
Charging System ◽  
Coil Structure ◽  
Power Transfer Efficiency ◽  
Wireless Power Transfer System

A typical magnetic resonance based wireless power transfer (WPT) system comprises a transmitter coil and an embedded receiver coil used for wireless charging of the electrical and electronics devices. It has been investigated that the coil structure influence the power transfer efficiency of the wireless charging system .The investigations have been carried out in order to determine a suitable coil type and geometry so as to achieve higher efficiency of a wireless power transfer system. The present investigation will afford the design strategy for an efficient wireless charging system .

Using Sensing Coils to Detect and Correct Lateral Misalignments in an Inductive Power-Transfer Wireless Charging System

2017 ◽  
Author(s):  
Ivan Cortes ◽  
Won-jong Kim
Keyword(s):  
Consumer Products ◽  
Wireless Charging ◽  
Power Transfer ◽  
Wireless Power ◽  
Inductive Power Transfer ◽  
Charging System ◽  
Field Symmetry ◽  
Electrical Transformers ◽  
Efficient Power ◽  
Inductive Power

Inductive power transfer (IPT) remains one of the most common ways to achieve wireless power transfer (WPT), operating on the same electromagnetic principle as electrical transformers but with an air core. IPT has recently been implemented in wireless charging of consumer products such as smartphones and electric vehicles. However, one major challenge with using IPT remains ensuring precise alignment between the transmitting and receiving coils so that maximum power transfer can take place. In this paper, the use of additional sensing coils to detect and correct lateral misalignments in an IPT systems is modeled and tested. The sensing coils exploit magnetic-field symmetry to give a nonlinear measure of misalignment direction and magnitude. Experiments using such sensing coils give a misalignment-sensing resolution of less than 1 mm when applied to a common smartphone wireless charging system. Voltage readings from the sensing coils are used for feedback control of an experimental two-dimensional coil positioner. This system is able to reduce lateral misalignments to less than 2 mm in real time, allowing for efficient power transfer. The results of this experiment give confidence that similar sensing coils can be used to reduce lateral misalignments in scaled IPT systems, such as electric-vehicle wireless chargers.

scholarly journals Gallium Nitride Inverter Design with Compatible Snubber Circuits for Implementing Wireless Charging of Electric Vehicle Batteries

Machines ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 56 ◽  
Author(s):  
Fatemeh Rahmani ◽  
Payam Niknejad ◽  
Tanushree Agarwal ◽  
Mohammadreza Barzegaran
Keyword(s):  
Gallium Nitride ◽  
Electric Vehicle ◽  
Energy Savings ◽  
High Efficiency ◽  
Harmonic Distortion ◽  
Time Frame ◽  
Maximum Power ◽  
Wireless Charging ◽  
Power Transfer ◽  
Gate Drivers

High-frequency wireless power transfer (WPT) technology provides superior compatibility in the alignment with various WPT standards. However, high-efficiency and compact single-phase power switching systems with ideal snubber circuits are required for maximum power transfer capability. This research aims to develop an inverter using Gallium Nitride (GaN) power transistors, optimized RCD (resistor/capacitor/diode) snubber circuits, and gate drivers, each benefitting WPT technology by reducing the switching and conduction loss in charging electric vehicle batteries. A full-bridge GaN inverter was simulated and instituted as part of the wireless charging circuit design. The RCD circuits were adjusted by transferring maximum power from the power supply to the transmitter inductor. For verification of the simulated output, lab-scale experiments were implemented for two half-bridges controlled by gate drivers with corresponding snubber circuits. After authenticating the output results, the GaN inverter was tested with an input range of 30 V to deduce the success of charging electric vehicle batteries within an efficient time frame. The developed inverter, at 80 kHz frequency, was applied in place of a ready-to-use evaluation board, fully reducing less harmonic distortion and greatly increasing WPT system efficiency (~93%). In turn, the designed GaN inverter boasts considerable energy savings, resulting in a more cost-effective solution for manufacturers.

scholarly journals Modeling, Analysis, and Implementation of Series-Series Compensated Inductive Coupled Power Transfer (ICPT) System for an Electric Vehicle

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Moustapha Elwalaty ◽  
Mohamed Jemli ◽  
Hechmi Ben Azza
Keyword(s):  
Electric Vehicle ◽  
Mathematical Expression ◽  
Electrical Circuit ◽  
Air Gap ◽  
Battery Life ◽  
Receiver Coil ◽  
Wireless Charging ◽  
Power Transfer ◽  
Charging System ◽  
Transmitter Coil

This paper focuses on the modeling and implementation of an Electric Vehicle (EV) wireless charging system based on inductively coupled power transfer (ICPT) technique where electrical energy can be wirelessly transferred from source to vehicle battery. In fact, the wireless power transfer (WPT) system can solve the fundamental problems of the electric vehicle, which are the short battery life of the EV due to limited battery storage and the user safety by handling high voltage cables. In addition, this paper gives an equivalent electrical circuit of the DC-DC converter for WPT and comprises some basic components, which include the H-bridge inverter, inductive coupling transformer, filter, and rectifier. The input impedance of ICPT with series-series compensation circuit, their phases, and the power factor are calculated and plotted by using Matlab scripts programming for different air gap values between the transmitter coil and receiver coil. The simulation results indicate that it is important to operate the system in the resonance state to transfer the maximum real power from the source to the load. A mathematical expression of optimal equivalent load resistance, corresponding to a maximal transmission efficiency of a wireless charging system, was demonstrated in detail. Finally, a prototype of a wireless charging system has been constructed for using two rectangular coils. The resonant frequency of the designed system with a 500 × 200 mm transmitter coil and a 200 × 100 mm receiver coil is 10 kHz. By carefully adjusting the circuit parameters, the implementation prototype have been successfully transferred a 100 W load power through 10 cm air gap between the coils.

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