气候变化领域集成服务门户(CCPortal): Significant power enhancement of magneto-mechano-electric generators by magnetic flux concentration

CCPortal

DOI	10.1039/d0ee01574a
	Significant power enhancement of magneto-mechano-electric generators by magnetic flux concentration
	Song H.; Patil D.R.; Yoon W.-H.; Kim K.-H.; Choi C.; Kim J.-H.; Hwang G.-T.; Jeong D.-Y.; Ryu J.
发表日期	2020
ISSN	1754-5692
起始页码	4238
结束页码	4248
卷号	13 期号:11
英文摘要	A magneto-mechano-electric (MME) generator comprising a cantilever structured magnetoelectric (ME) composite having a magnet-proof mass is an ideal candidate for powering autonomous Internet of Things (IoT) sensor networks by scavenging electric energy from ambient magnetic noise. However, charging an energy storage device in a short time using an MME generator from low-intensity magnetic noise flux spreading in radial directions, e.g., around power cables, requires the generator volume to be enlarged. Here, we demonstrated a novel method to enhance the output power of the given MME generator by concentrating a magnetic flux around the circumference of an MME generator structure using a magnetic flux concentrator (MFC) fabricated from a high-permeability magnetic material. The output power of the MME generator was significantly enhanced by optimizing the MFC structure in terms of its shape, aspect ratio, magnetic permeability, and the number of layers, both through finite element analysis and experiments. The MME generator with the MFC was observed to generate a maximum power of 3.33 mW, which was 285% of that of the condition without the MFC (1.17 mW) under a weak magnetic field of 8 Oe (= 8 G = 800 μT in air), which was sufficient to charge the 2.2 mF storage capacitor within 13 s and continuously operate an IoT sensor for a long period. The stored energy is also sufficient enough to turn on 100 blue LEDs with high intensity. Furthermore, we demonstrated a realistic practical application by installing the self-powered wireless environmental monitoring module consisting of the MME generator with the MFC at a power substation, which successfully scavenges the power from the magnetic fields around the power cables and continuously operates a temperature wireless sensor. These results indicated that the MFC has great potential to enhance the performance of an MME generator as the power source of standalone IoT sensors without enlarging the MME generator. © The Royal Society of Chemistry.
语种	英语
scopus关键词	Aspect ratio; Composite structures; Energy storage; Internet of things; Magnetic fields; Magnetic flux; Magnetic materials; Magnetic permeability; Magnetic storage; Sensor networks; Telecommunication cables; Electric energies; Environmental Monitoring; Internet of Things (IOT); Magnetic flux concentration; Magnetic flux concentrators; Power enhancement; Storage capacitor; Weak magnetic fields; Electric generators; composite; concentration (composition); energy storage; Internet; magnetic field; performance assessment; sensor; temperature
来源期刊	Energy and Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162771
作者单位	School of Materials Science and Engineering, Yeungnam University, Gyeongsan, 38541, South Korea; Korea Institute of Materials Science (KIMS), Changwon, Gyeongnam, 51508, South Korea; School of Materials Science and Engineering, Pusan National University, Busan, 46241, South Korea; Kepco Research Institute, Energy and Environment Laboratory, Daejeon, 34056, South Korea; Korea Electrotechnology Research Institute (KERI), Changwon, Gyeongnam, 51543, South Korea; Department of Materials Science and Engineering, Pukyong National University, Busan, 42601, South Korea; Department of Materials Science and Engineering, Inha University, Incheon, 22212, South Korea; Institute of Materials Technology, Yeungnam University, Gyeongsan, 38541, South Korea
推荐引用方式 GB/T 7714	Song H.,Patil D.R.,Yoon W.-H.,et al. Significant power enhancement of magneto-mechano-electric generators by magnetic flux concentration[J],2020,13(11).
APA	Song H..,Patil D.R..,Yoon W.-H..,Kim K.-H..,Choi C..,...&Ryu J..(2020).Significant power enhancement of magneto-mechano-electric generators by magnetic flux concentration.Energy and Environmental Science,13(11).
MLA	Song H.,et al."Significant power enhancement of magneto-mechano-electric generators by magnetic flux concentration".Energy and Environmental Science 13.11(2020).