A High-Efficiency Power Supply from Magnetic Energy Harvesters

Lim, Cha-Yong; Jeong, Yong Hwan; Kim, Keon-Woo; Kang, Feiyu; Moon, Gun-Woo

doi:10.23919/ipec.2018.8507990

Cited by 6 publications

(5 citation statements)

References 3 publications

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“…The maximum harvested power has a value of 10.6 W at 55 A in the conventional design method. Compared with [29], we can achieve a value of 8.7 W near the saturation point, an increase of 21.7%, by applying the proposed design method. Moreover, the proposed model is found to agree better with the measurement results in saturated regions than does the previous model.…”

Section: Experimental Results For Maximum Harvested Power In Saturated Condition Over Wide Primary Current Rangementioning

confidence: 98%

“…The circuit model of the MEH was developed using the practical transformer model [29] shown in Fig. 4(a).…”

Section: A Output Model With Constant Magnetizing Inductancementioning

confidence: 99%

“…For a given Ipri, the parameter Po is also dependent on the values Lm,sat and teff. The numerical calculation of the response of Po to Vpri was compared with those of the conventional model [28], [29] and of measurements. Fig.…”

Section: Output Model With Saturable Magnetizing Inductancementioning

confidence: 99%

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The Magnetic Energy Harvester With Improved Power Density Using Saturable Magnetizing Inductance Model for Maintenance Applications Near High Voltage Power Line

et al. 2021

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Recently, maintenance applications around power lines have been actively studied. These applications usually supply power through magnetic energy harvesting(MEH) to devices around the power line. A major challenge for practical MEH is to overcome magnetic saturation, which can cause degradation of power density under a wide current range in the power line. In this paper, we propose a design methodology to harvest maximized output power by considering the saturation effect. To consider magnetic saturation, the output power model and the saturable magnetizing inductance model based on magnetizing current were comprehensively analyzed. Additionally, the critical point of saturation for the maximum harvested power was analyzed by considering different primary side current conditions. With the proposed design methodology, the accuracy and efficiency of the output model were verified with experimental results compared to the conventional model. To consider the real environment, a 150 kW class of AC resistor load bank was implemented to control the primary current from 0 to 100 A with power frequency of 60 Hz. Experimental results show that the proposed method can harvest an average power of 14.32 W on 70 A power line, which is an increase of 39.8 % compared with the conventional design method.

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Section: Experimental Results For Maximum Harvested Power In Saturated Condition Over Wide Primary Current Rangementioning

confidence: 98%

“…The circuit model of the MEH was developed using the practical transformer model [29] shown in Fig. 4(a).…”

Section: A Output Model With Constant Magnetizing Inductancementioning

confidence: 99%

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The Magnetic Energy Harvester With Improved Power Density Using Saturable Magnetizing Inductance Model for Maintenance Applications Near High Voltage Power Line

et al. 2021

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“…Cable clamped harvesters harvest more energy when compared to free standing harvesters as they enclose the current carrying conductor and are very close to varying magnetic field as shown in Fig1. [4]. The following paper gives a brief description about clamped magnetic field harvesting Yuan Zhuang et al [5] propose magnetic field harvesting system which encloses overhead transmission lines.…”

Section: A Clamped Magnetic Field Harvesting Systemmentioning

confidence: 99%

Energy Harvesting Techniques for Monitoring Devices in Smart Grid Application

Pavana

Deshpande

2020

2020 Third International Conference on Advances in Electronics, Computers and Communications (ICAECC)

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Energy harvesting is a process of capturing, storing and conditioning ambient and residual energies for future use. The amount of residual energy captured is very small and can be used for low power load such as wireless sensor nodes. Wireless sensor nodes are used to monitor physical parameters at diverse locations. They find extensive applications in military, health care industries, environmental monitoring and smart grids. One of the major constraints of Wireless sensor node is battery lifetime as battery gets depleted over a period of time. Energy harvesting techniques can be used to overcome this constraint and has the ability to make wireless sensor node self sustainable. This paper provides an overview of energy harvesting techniques used for wireless sensor nodes in smart grid application.

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“…Compared with conventional energy supply devices such as batteries, an energy harvester has the advantages of a longer lifetime, a smaller size, and better reliability. External energy sources mainly include vibration energy [ 2 ], solar energy [ 3 ], magnetic energy [ 4 ], and acoustic energy [ 5 , 6 ]. Among them, acoustic energy has become a hot spot because it is widely distributed in the environment.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Quarter Spherical Acoustic Energy Harvester Based on Dual Helmholtz Resonators

Yang

Xue

et al. 2020

Sensors

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An enhanced quarter-spherical acoustic energy harvester (AEH) with dual Helmholtz resonators was designed in this work. Compared with the previous research, this AEH can harvest multi-directional acoustic energy, has a widened resonance frequency band, and has an improved energy conversion efficiency. When the length of resonator’s neck is changed, the acoustic resonant frequency of the two resonators is different. The theoretical models of output voltage and output power were studied, and the relationship of output performance with frequency was obtained. The results showed that this AEH can operate efficiently in a frequency band of about 470 Hz. Its output voltage was found to be about 28 mV, and its output power was found to be about 0.05 μW. The power density of this AEH was found to be about 12.7 µW/cm2. Therefore, this AEH could be widely used in implantable medical devices such as implantable cardiac pacemakers, cochlear implants, and retinal prosthesis.

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A High-Efficiency Power Supply from Magnetic Energy Harvesters

Cited by 6 publications

References 3 publications

The Magnetic Energy Harvester With Improved Power Density Using Saturable Magnetizing Inductance Model for Maintenance Applications Near High Voltage Power Line

The Magnetic Energy Harvester With Improved Power Density Using Saturable Magnetizing Inductance Model for Maintenance Applications Near High Voltage Power Line

Energy Harvesting Techniques for Monitoring Devices in Smart Grid Application

Enhanced Quarter Spherical Acoustic Energy Harvester Based on Dual Helmholtz Resonators

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