Analysis of Multi-Coil Omnidirectional Energy Harvester

Tian, Xiaoyang; Chau, K. T.; Liu, Wei; Lee, Christopher

doi:10.1109/tmag.2020.3015732

Cited by 19 publications

(8 citation statements)

References 13 publications

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“…Wireless chargers are also designed to harvest energy at relatively high levels. To guarantee the high rate of delivered power, the alignment of transmitter and receiver and their distance should be optimized [62][63]. Fig.…”

Section: B Wireless Power Transmittermentioning

confidence: 99%

Review and Analysis of Magnetic Energy Harvesters: A Case Study for Vehicular Applications

Enayati

Asef

2022

IEEE Access

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Energy harvesting (EH), as an enabling technology of energy derivation from ambient sources, has attracted much research attention in wireless sensor network (WSN) context. The magnetic energy harvester (MEH) introduces ambient energy harvesters' most promising technological development. This paper presents a review and analysis of MEH applications in WSN like vehicular systems and technologies. The successful approaches are introduced and classified based on technical characteristics and working principles. The fundamentals of their operation are discussed in detail, and the power points of each method are reviewed. To select the optimal energy harvester, in this work a case study is provided for feeding navigational sensors mounted on a rotating wheel of vehicles. Finally, the performance of the developed MEH model is evaluated and discussed for harvesting energy at the rotating wheels of a ground vehicle. To offer electromagnetic field analysis of the studied MEH, the simulations are performed in Ansys Maxwell software for further harvested power evaluation.

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Section: B Wireless Power Transmittermentioning

confidence: 99%

Review and Analysis of Magnetic Energy Harvesters: A Case Study for Vehicular Applications

Enayati

Asef

2022

IEEE Access

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“…Let By substituting (7) and (8) in the electric Equation ( 6) of the load current of the 2D system, we can derive expressions that describe the input power, the load current, and the power load in terms of the magnetic resultant angle and the angular position of the receiver (α, θ); hence, the complexity imposed by the mutual coupling terms can be solved by replacing M 13 M 23 with their Fourier expressions (7) and ( 8), M 13 (α) and M 23 (α), respectively, thus enabling an accurate control design and simulation for both the 2D and 3D orthogonal WPT systems.…”

Section: System Modelingmentioning

confidence: 99%

“…In robot applications, a three orthogonal coil structure was presented to pick up wireless power, in order to ensure a maximum coupling coefficient when the robot arm rotates, the primary and secondary coils are designed to fit inside the robot elbow [6]. Similarly, a WPT energy harvester with a multicoil structure was designed to solve the misalignment issue for mobile devices [7]. Additionally, in [8], a cubic magnetic dipole coil structure was proposed to transmit power omnidirectionally, and for multiloads, another research presented a 3D wireless charging cylinder based on two orthogonal coils.…”

Section: Introductionmentioning

confidence: 99%

2D Omni-Directional Wireless Power Transfer Modeling for Unmanned Aerial Vehicles with Noncollaborative Charging System Control

Allama

Habaebi

Khan³

et al. 2021

Electronics

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Wireless power transfer (WPT) has been extensively studied from various aspects such as far field and near field, operating frequency, coil design, matched capacitance values, misaligned locations of transmitting and receiving coils, distance variance between them, target loads in the specific locations, environment, and operating conditions. This is due to the usefulness of WPT technology in many applications, including the revolutionary method of auto-recharging of unmanned aerial vehicles (UAVs). This paper presents analytical modeling of a WPT-link with two orthogonal transmitting coils arranged to produce an omnidirectional magnetic field suitable for charging a moving rotating load, maximizing energy transfer without any feedback from the receiving end. To achieve a suitable 2D WPT simulation system, as well as an accurate control design, the mutual coupling values in terms of receiver angular rotation are simulated using Ansys software. Power transfer is maximized by using extremum seeking control (ESC), making use of the input power as an objective function with specific parameter values that represent the WPT model to obtain the results. The results shown are those of the input power transmitted by the transmitting-end coils to a load of an orbiting mobile UAV. Based on the simulation results, the controller can achieve maximum power transfer in 100 µs of duration when the speed of the UAV is close to 314 rad/s.

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“…However, this kind of system will still have great output fluctuation in dynamic applications or unstable power transmission environments. Previous research proposes a multi-coil structured energy pick-up unit to reduce this fluctuation by further increasing the coil number of the receiver [26]. But this will also inevitably bring unnecessary reactive power to the system and reduce the system efficiency.…”

Section: Iintroductionmentioning

confidence: 99%

Omnidirectional Magnetic Resonant Extender Design for Underwater Wireless Charging System

Tian,

Liu,

Chau

et al. 2024

IEEE J. Emerg. Sel. Topics Power Electron.

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Long-range underwater wireless power transfer (WPT) systems have great application prospects in many industrial fields. However, conventional WPT systems may suffer different kinds of technical issues in this highly unstable operation environment, such as large output decay when the transmission distance increases, and output fluctuation caused by instability of the water flows. To solve these problems, this paper proposes a novel solution to achieve an enlarged resonance range, higher efficiency, and more stable output. The LCC-S-S compensation circuit is adopted in the system with a highly stable primary current, which improves its fault tolerance ability to adapt to the unstable underwater environment. A portable omnidirectional magnetic resonant extender is designed as an intermediate device to extend the underwater transmission distance and raise the system efficiency. The specially designed structure enables it with two separate but complementary three-coil WPT systems which solves the conventional angular dead zones issue. Theoretical analysis proves that under the idealized conditions, both the magnitude and phase of the load current can be effectively maintained as absolute constant, with arbitrary water flow direction or velocity. Both circuit simulation and finite element analysis (FEA) results are presented to validate that the system is possessed with high fault tolerance. For further assessment, an experimental prototype is established, and the practical test results confirm that the system can maintain a relatively high transmission efficiency under large lateral and angular misalignments ranging from -90° to +90°.

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Analysis of Multi-Coil Omnidirectional Energy Harvester

Cited by 19 publications

References 13 publications

Review and Analysis of Magnetic Energy Harvesters: A Case Study for Vehicular Applications

Review and Analysis of Magnetic Energy Harvesters: A Case Study for Vehicular Applications

2D Omni-Directional Wireless Power Transfer Modeling for Unmanned Aerial Vehicles with Noncollaborative Charging System Control

Omnidirectional Magnetic Resonant Extender Design for Underwater Wireless Charging System

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