Single-Layer Transmitter Array Coil Pattern Evaluation toward a Uniform Vertical Magnetic Field Distribution

Luo, Win‐Jet; Kuncoro, C. Bambang Dwi; Pratikto,; Kuan, Yean‐Der

doi:10.3390/en12214157

Cited by 6 publications

(2 citation statements)

References 15 publications

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“…The electromagnetic generation concept is shown in Figure 3, when a conductor, or as in this matter, a wire, is being flown with the electric current, an electromagnetic field will be generated around the wire. The sum of the electromagnetic field at a specific segment (dI) along a conductor at any point (P) is denoted as dB [31].…”

Section: Wpt Technologymentioning

confidence: 99%

Prospective Powering Strategy Development for Intelligent-Tire Sensor Power Charger Application

et al. 2021

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Tire sensors embedded in a vehicle tire are stand-alone autonomous devices. A tire sensor reserve power strategy is crucial due to sensor energy sources limitations for long operational periods. This paper presents an innovative tire sensor powering strategy for the intelligent-tire system. The powering strategy offers a green concept, maintenance-free, and low-cost method in order to extend the tire sensor lifetime for long operating periods. The proposed strategy adopts wireless power transfer (WPT) technology to transfer power to an electrical load mounted on the rotational system without an interconnection cable. It is composed of a power transmitter designed to be mounted on the vehicle’s inner fender liner, and a power receiver that provides power to recharge the tire sensor battery/energy storage. The transmitter transfers power from the vehicle battery/accumulator to a power receiver coupled with the tire sensor which is mounted on the vehicle tire inner wall. WPT devices were designed based on induction electromagnetic coupling and can provide an output current up to 1A at 5 V. The proposed powering strategy was verified using a vehicle tire simulator model to emulate rotational motion. A voltage and current sensor module as well microcontroller and data logger modules were utilized as the load for the developed WPT system. The verification experimental and preliminary test results reveal that the proposed strategy can provide constant power to the load (in this case, the voltage is around 4.3 V and the current is around 21.1 mA) although the vehicle tire model was rotated at different speeds from 0 rpm to 800 rpm. The proposed system has the potential and feasibility for implementation in tire sensor power applications in the intelligent-tire system.

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Section: Wpt Technologymentioning

confidence: 99%

Prospective Powering Strategy Development for Intelligent-Tire Sensor Power Charger Application

et al. 2021

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“…This geometry has been widely used in wireless power transfer applications to improve power transfer performance and misalignment tolerance compared to other coil geometries [18,19]. Several coil structures with different coil parameters were numerically analyzed using the method presented in [17] to obtain the proper vertical magnetic field (Bz) distribution and transmitting area for the proposed device. The evaluated coil geometry is a circular flat spiral air-core coil as shown in Figure 5, which has parameters as shown in Table 1.…”

Section: Coil Designmentioning

confidence: 99%

Wireless Power Hanger Pad for Portable Wireless Audio Device Power Charger Application

2020

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Since the portability feature has been introduced in headphone development, this device now uses a battery as the main built-in power. However, the battery has limited power capacity and a short lifetime. Battery substitution and a conventional battery charger method is an ineffective, inflexible inconvenience for enhancing the user experience. This paper presents an innovative portable audio device battery built-in charger method based on wireless power technology. The developed charging device is composed of a headphone hanger pad for the wireless headphone and a charging pad for the portable wireless audio device battery charging. Circular flat spiral air-core coil was designed and evaluated using a numerical method to obtain optimal vertical magnetic field distribution based on the proposed evaluation criteria. A coil has inner coil diameter of 25 mm, outer coil diameter of 47.8 mm, wire diameter of 0.643 mm, the pitch of 0.03 mm and a number of turns of 17 was chosen to be implemented on the transmitter coil. A magnetic induction technique was adopted in the proposed wireless power transmission module which was implemented using commercial off-the-shelf components. For experimental and validation purposes, a developed receiver module applied to the commercial wireless headphone and portable audio speaker have a built-in battery capacity at 3.7 V 300 mAh. The experimental results show that the wireless power hanger pad prototype can transfer a 5 V induction voltage at a maximum current of 1000 mA, and the power transfer efficiency is around 70%. It works at 110 kHz of operation frequency with a maximum transmission distance of about 10 mm and takes 1 h to charge fully one 3.7 V 300 mAh polymer lithium battery.

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Eco‐green portable wireless power charger design with low‐voltage, high‐current fuel cell power source features

2020

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Since portable wireless power charger devices have grown rapidly in the market, this device has potential to become standard power charger for portable electronic devices. It offers enhanced consumer convenience and experience. This article presents an innovative portable wireless power charger that is more environmental-friendly because it uses a hydrogen gas fuel cell as the power source. Compared with fossil energy, the fuel cell is clean and renewable, which does not contribute a negative impact on the environment. A wireless power transmission (WPT) system was developed based on the electromagnetic induction technique in order to propagate electromagnetic energy from the transmitter to the receiver with operating frequency at 110 kHz. A four-cell proton exchange membrane fuel cell (PEMFC) planar module with open type at cathode side was applied to provide 4.11 W with its low-voltage and high-current features. A single-cell PEMFC produces output voltage ranging from 0.6 to 0.7 V and configures in serial to form a four-cell PEMFC planar module. Two DC-DC boost converter module in a parallel configuration was used to convert to a suitable voltage and current to the WPT module. The experimental validation shows that the developed system provides power around 1.6 W to the device battery under recharging with power efficiency delivery up to 70%. The charging experiment reveals the device battery capacity under recharging (cell phone) increases 1% in 3.3 minutes and it consumes the hydrogen at around 1.2 L.

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Single-Layer Transmitter Array Coil Pattern Evaluation toward a Uniform Vertical Magnetic Field Distribution

Cited by 6 publications

References 15 publications

Prospective Powering Strategy Development for Intelligent-Tire Sensor Power Charger Application

Prospective Powering Strategy Development for Intelligent-Tire Sensor Power Charger Application

Wireless Power Hanger Pad for Portable Wireless Audio Device Power Charger Application

Eco‐green portable wireless power charger design with low‐voltage, high‐current fuel cell power source features

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