scholarly journals An Enhanced Method of Contactless Charging of Railway Signaling Torch Light

2021 ◽  
Vol 15 ◽  
pp. 21-25
Author(s):  
K. Muthusamy ◽  
P. Rajesh ◽  
B. Gokulavasan
Keyword(s):  
Electrical Power ◽  
Life Time ◽  
Air Gap ◽  
Secondary Coil ◽  
Wireless Charging ◽  
Electric Cars ◽  
Charging System ◽  
Wide Range ◽  
Magnetic Resonance Coupling ◽  
Resonance Coupling

Wireless charging, also known as contactless charging (for shorter range), is a method of supplying energy to electrical devices by sending electricity via an air gap. Wireless charging methods have advanced recently, and commercial solutions have been developed, providing a potential option to overcome the energy bottleneck of typically portable battery-powered gadgets. Due to its simplicity and improved user experience, this technology is attracting a wide range of applications, from low-power gadgets to high-power electric cars. However, including wireless charging into the systems raises a number of difficult challenges in terms of implementation, scheduling, and power management. One such application is to convert the existing system of traditional battery powered railway signaling torchlight into a rechargeable type contactless charging system. This provides a better way of increasing the life time of the product and has better compactness. A rechargeable Li-ion battery must be installed in lieu of the old non-rechargeable battery. To achieve satisfactory efficiency, the magnetic resonance coupling technology of contactless charging can be utilized. Through a shorter air gap, electrical power is transmitted from the charging module (main coil) to the Torchlight (secondary coil). Overall, the present system's cost, size are reduced and lifetime is increased.

Wireless Charging of Electric Vehicles: A Review and Experiments

2011 ◽  
Author(s):  
Chengbin Ma ◽  
Minfan Fu ◽  
Xinen Zhu
Keyword(s):  
Magnetic Resonance ◽  
Electric Vehicle ◽  
Electric Vehicles ◽  
High Efficiency ◽  
System Level ◽  
Prototype System ◽  
Wireless Charging ◽  
Charging System ◽  
Magnetic Resonance Coupling ◽  
Resonance Coupling

In this paper, the technologies for electric vehicle wireless charging are reviewed including the inductive coupling, magnetic resonance coupling and microwave. Among them, the magnetic resonance coupling is promising for vehicle charging mainly due to its high efficiency and relatively long transfer range. The design and configuration of the magnetic resonance coupling based wireless charging system are introduced. A basic experimental setup and a prototype electric vehicle wireless charging system are developed for experimental and research purposes. Especially the prototype system well demonstrates the idea of fast and frequent wireless charging of supercapacitor electric vehicles using magnetic resonance coupling. Though the idea of wireless energy transfer looks sophisticated, it is proved to be a handy technology from the work described in the paper. However, both component and system-level optimization are still very challenging. Intensive investigations and research are expected in this aspect.

scholarly journals Optimization design of wireless charging system for autonomous robots based on magnetic resonance coupling

AIP Advances ◽  
2018 ◽  
Vol 8 (5) ◽  
pp. 055004 ◽  
Author(s):  
Junhua Wang ◽  
Meilin Hu ◽  
Changsong Cai ◽  
Zhongzheng Lin ◽  
Liang Li ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Optimization Design ◽  
Autonomous Robots ◽  
Wireless Charging ◽  
Charging System ◽  
Magnetic Resonance Coupling ◽  
Resonance Coupling

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.

The Impact of NiCuZn Ferrite Material on the Inductive Wireless Charging

2014 ◽  
Vol 670-671 ◽  
pp. 1462-1466
Author(s):  
Dong Yue Li ◽  
Di Fei Liang ◽  
Qing Zhao
Keyword(s):  
Electromagnetic Induction ◽  
Coupling Efficiency ◽  
Transmission Efficiency ◽  
Secondary Coil ◽  
Wireless Charging ◽  
Primary Coil ◽  
Charging System ◽  
Ferrite Material ◽  
Nicuzn Ferrite ◽  
The Impact

Based on the principle of electromagnetic induction coupling of the wireless charging system, the main factors of the transmission efficiency is the coupling efficiency between the primary coil and the secondary coil. In order to improve the charging efficiency, NiCuZn ferrite material can be added in the wireless charging system. Thus, the wireless charging system can obtain high flux, and improve the transmission efficiency.

scholarly journals Efficient Wireless Power Transfer via Magnetic Resonance Coupling Using Automated Impedance Matching Circuit

Electronics ◽  
2021 ◽  
Vol 10 (22) ◽  
pp. 2779
Author(s):  
Esraa Mousa Ali ◽  
Mohammad Alibakhshikenari ◽  
Bal S. Virdee ◽  
Mohammad Soruri ◽  
Ernesto Limiti
Keyword(s):  
Magnetic Resonance ◽  
Impedance Matching ◽  
Low Frequency ◽  
Wireless Power Transfer ◽  
Consumer Electronics ◽  
Power Transfer ◽  
Wireless Power ◽  
Wide Range ◽  
Magnetic Resonance Coupling ◽  
Resonance Coupling

In this paper, an automated impedance matching circuit is proposed to match the impedance of the transmit and receive resonators for optimum wireless power transfer (WPT). This is achieved using a 2D open-circuited spiral antenna with magnetic resonance coupling in the low-frequency ISM band at 13.56 MHz. The proposed WPT can be adopted for a wide range of commercial applications, from electric vehicles to consumer electronics, such as tablets and smartphones. The results confirm a power transfer efficiency between the transmit and receive resonant circuits of 92%, with this efficiency being sensitive to the degree of coupling between the coupled pair of resonators.

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