scholarly journals Analysis of the Mutual Impedance of Coils Immersed in Water

2021 ◽  
Vol 7 (8) ◽  
pp. 113
Author(s):  
Peizhou Liu ◽  
Tiande Gao ◽  
Zhaoyong Mao
Keyword(s):  
Power Transmission ◽  
Excitation Frequency ◽  
Magnetic Coupling ◽  
System Optimization ◽  
Magnetic Vector Potential ◽  
Wireless Power ◽  
Mutual Impedance ◽  
Coupling Characteristics ◽  
Impedance Calculation ◽  
Key Parameter

Magnetic induction communication and wireless power transmission based on magnetic coupling have significant application prospects in underwater environments. Mutual impedance is a key parameter particularly required for the design of the systems. However, mutual impedance is usually extracted from measurements when the coils are processed, which is obviously not conducive to the system optimization in the design phase. In this paper, a model of the mutual impedance of coils immersed in water is established. The magnetic vector potential is expressed in the form of series by artificially setting a boundary, and then the mutual impedance calculation formula of the coils immersed in water is derived. In the analysis, the effect of the conductivity of water, the excitation frequency, and the number of turns of the coils are mainly taken into account. In addition, the variation of the mutual impedance of coils in air and water with axial displacement is also compared. The models can be used to analyze the coil coupling characteristics in the presence of conductive medium, which is helpful for the design process.

scholarly journals Analysis of the Transformer Characteristics for an Integration System with a Wireless Power Transfer Device and Linear Motor

Energies ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6769
Author(s):  
Hwajin Woo ◽  
Jang-Hyun Park ◽  
Changdae Joo ◽  
Hokyun Ahn ◽  
Dohyun Kang ◽  
...  
Keyword(s):  
Power Transmission ◽  
Magnetic Coupling ◽  
Wireless Power Transfer ◽  
Linear Motor ◽  
Power Transfer ◽  
Analysis Method ◽  
Wireless Power ◽  
Characteristic Analysis ◽  
Integration System ◽  
Coupling Characteristics

This paper proposed the transformer characteristic analysis method for the wireless power transfer (WPT) device and linear motor (LM) integration system that can be applied to industrial cleanroom transfer systems. A cable is required to supply the power in conventional systems. In comparison, the proposed system utilizes a WPT device that can simplify power transfers and make a better space utilization. The shape of the wireless power transmission system is proposed along with the discussion of the 2D FEA analysis method about the inductance analyzing method, which are important parameters in magnetic coupling. In addition, ferrite iron loss was calculated based on the analysis results, and applied to the entire modeling circuit to verify the validity of the measured and analyzed values. Finally, the proposed analysis method for the transformer coupling characteristics of the wireless power transfer combined with the transfer system is verified by experiments and simulations.

Characteristic Research on Wireless Power Transfer Based on Magnetic Coupling Resonant

2014 ◽  
Vol 687-691 ◽  
pp. 3379-3382
Author(s):  
Shui Xiang Cui ◽  
Zhi Juan Zhang ◽  
Xue Mei Liang
Keyword(s):  
Theoretical Analysis ◽  
Power Transmission ◽  
Magnetic Coupling ◽  
Load Resistance ◽  
Transmission Efficiency ◽  
Wireless Power ◽  
Load Power ◽  
Transmission Distance ◽  
Working Principle ◽  
Coil Size

This paper analyses the working principle of magnetic coupling resonant wireless power transmission system based on mutual inductance coil model, and then gets the expressions of load power and transmission efficiency. By the theoretical analysis the relations between the various system parameters such as: coil size, transmission distance, load resistance, the resonant frequency and load power, transmission efficiency are obtained. According to the results of theoretical analysis, the system’s characteristics of load power and transmission efficiency with varying transmission distance are studied. Finally, simulations verify the accuracy of analysis by Matlab/Simulink.

Pulse-Driving Based Magnetic Coupling Resonant Wireless Power Transmission System Research

2011 ◽  
Vol 378-379 ◽  
pp. 539-542
Author(s):  
Qiang Wang ◽  
Hong Li
Keyword(s):  
Optimization Design ◽  
Power Transmission ◽  
Magnetic Coupling ◽  
Transmission Efficiency ◽  
Transmission System ◽  
System Research ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Power Transmission System ◽  
Magnetic Resonances

This paper analyses and designs a kind of pulse-driving based wireless power transmission system via coupled magnetic resonances. It analyzes the influence of the related parameters on the transfer efficiency and transfer power of the system. The experiment tests the proposed wireless power transmission system, and the results show that the above relevant parameters should be comprehensively considered, in order to achieve the optimization design of the transmission efficiency or transmission power. The experiment results also show the validity of the theoretical analysis.

scholarly journals Analysis and Design of Asymmetric Mid-Range Wireless Power Transfer System with Metamaterials

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1348
Author(s):  
Yingqin Zeng ◽  
Conghui Lu ◽  
Cancan Rong ◽  
Xiong Tao ◽  
Xiaobo Liu ◽  
...  
Keyword(s):  
Printed Circuit Board ◽  
Power Transmission ◽  
Magnetic Coupling ◽  
Wireless Power Transfer ◽  
Circuit Board ◽  
Power Transfer ◽  
Wireless Power ◽  
Analysis And Design ◽  
Transfer Distance ◽  
Power Transfer Efficiency

In a wireless power transfer (WPT) system, the power transfer efficiency (PTE) decreases sharply with the increase in transfer distance. Metamaterials (MMs) have shown great potential to enhance PTE in mid-range WPT systems. In this paper, we propose two MM slabs of a 3 × 3 array to enhance the magnetic coupling. The MM unit cell was designed by using square spiral patterns on a thin printed circuit board (PCB). Moreover, the asymmetric four-coil WPT system was designed and built based on the practical application scenario of wireless charging for unmanned devices. The simulation and experimental results show that two MM slabs can enhance power transmission capability better than one MM slab. By optimizing the position and spacing of two MM slabs, the PTE was significantly improved at a mid-range distance. The measured PTEs of a system with two MM slabs can reach 72.05%, 64.33% and 49.63% at transfer distances of 80, 100 and 120 cm. When the transfer distance is 100 cm, the PTE of a system with MMs is 33.83% higher than that without MMs. Furthermore, the receiving and load coils were integrated, and the effect of coil offset on PTE was studied.

Wireless Power and SIMO Control Based on Magnetic Coupling Resonance Using in Delta Robot

2019 ◽  
Author(s):  
Jue Wang ◽  
Genliang Chen ◽  
Hao Wang
Keyword(s):  
Position Control ◽  
Power Transmission ◽  
Magnetic Coupling ◽  
Open Loop ◽  
Wireless Power ◽  
Dc Motors ◽  
Wireless Control ◽  
Electromagnetic Power ◽  
Single Input ◽  
Delta Robot

Abstract Resonance selectivity is a new way to achieve “Single-input Multi-output” (SIMO) system via wireless electromagnetic power transmission. But it is limited to low power and open loop systems. This paper presents a new method that uses the principle of resonance selectivity of which system is close loop and the power is over 10w. By using this method, we drive three DC motors to control a delta robot which is based on flexible linkages with feedback control. In this paper, we achieve the position control of delta robot through SIMO and wireless control. This paper introduces the principle of wireless control based on magnetic coupling resonance and the details about control system, and the fabrication and analysis of delta robot based on flexible linkages. According to the results of our experiment, we demonstrate that this method can be applied to control delta robot.

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