Electromagnetic energy harvesting extracts from magnetic fields and can provide power to sensors, monitoring nodes, cyber-physical systems control elements without additional battery external source wiring. This article presents a novel ac-driven electromagnetic harvester based on periodically saturating, cascaded magnetics, consisting of clampable core an ungapped high permeability core. The guarantees the maximum extraction, whereas enables nonintrusive installation for more pervasive...

Energy harvesting offers an important design option for creating sensing and control elements without a requirement custom wiring or batteries. An exciting possibility creates “self-powered” sensor node with integrated energy harvester that can extract power from the magnetic fields around line to load, in manner of current transformer. However, this “current transformer” provides not just sensing, but also package, all ohmic contact. This paper technique optimization maximizing harvest,...

Compared to many other energy harvesting schemes, from magnetic fields offers potential advantages for extraction and sensing. A harvester provides great flexibility sensors monitoring applications condition-based of electromagnetic actuators, including vibration thermal monitoring. core must be managed or operated with carefully timed saturation ensure maximum power extraction, a complex problem given the nonlinear characteristics [1]. This paper presents simulator-friendly "circuit model"...

Magnetic energy harvesting (MEH) extracts from magnetic fields generated AC current, providing power for environmental sensors, Internet of Things (IoTs), and monitoring nodes. The cascaded-magnetic-based electromagnetic harvesters, consisting a clampable core high-permeability ungapped core, feature relatively higher density predictability in harvesting. only facilitates non-intrusive mounting the harvester onto primary wire while is heart to guarantee maximum extraction usable output...

In this article, a novel Z-source dc circuit breaker topology with Q-shaped impedance network (Q-Z-source breaker) is presented. The new has better performance and more resilient properties than those of the recently published O-Z-source breaker. Q-Z provides bidirectional protection but only requires one semiconductor switch in its current path during normal operation, leading to simpler smaller physical structure lower conduction penalty. It also drastically improves sensitivity issue on...

It is difficult to assess airway obstruction using spirometry in adult asthmatic patients with preserved lung function. Impulse oscillometry (IOS) can detect not only resistance but also reactance. Therefore, IOS may be useful assessing pulmonary function such patients. We investigated the applicability of for asthma function.Between 2015 and 2018, 1,248 suspected having who visited Allergy Asthma Center Severance Hospital underwent both IOS. Consequently, 784 had asthma, 111 chronic...

This paper presents Eciton, a very low-power LSTM neural network accelerator for edge sensor nodes, demonstrating real-time processing on predictive maintenance applications with power consumption of 17 mW under load. Eciton reduces memory and chip resource requirements via 8-bit quantization hard sigmoid activation, allowing the as well model parameters to fit in lowcost, Lattice iCE40 UP5K FPGA. demonstrates at low minimal loss accuracy two scenarios differing characteristics, while...

Magnetic Energy Harvesting (MEH) leverages magnetic fields produced by AC current-carrying wires to harvest energy. This type of energy harvesting produces a relatively high volumetric density compared other ambient methods, suitable for self-powering low-power devices like embedded systems, sensor nodes, Internet-of-Things (IoT), and cyber-physical systems (CPS). Previous research works showed that the core should operate in an appropriately saturated state maximal harvesting. saturation is...

This paper presents a power electronic topology for providing vibration monitor with in-situ magnetic energy harvesting. The harvesting circuit uses low voltage MOSFETs and nano-crystalline core to extract from an operating electrical load like motor. can be used sensors wireless circuitry diagnostics no need battery or special wiring. Harvesting 90 W-60 Hz load, Vibration Assessment Monitoring Point Integrated Recovery of Energy (VAMPIRE) produces 7.5mW the volume 2.9 cm <sup...

Energy harvesting technologies proliferate self-powered autonomous devices via presenting a higher degree of freedom for sensors and control elements. Among all types energy harvesting, electromagnetic provides relatively denser features high predictability in an amount extraction seamless accessibility consumption measurement. This paper illustrates electromag-netic harvester, which consists clampable magnetic core tandem with ungapped permeability that extracts from fields induced by AC...

A wireless power transfer system for multi-user charging is proposed to demonstrate a robust quasi-uniform efficiency in 3-D space. It employs set of balanced magnetic coils excited with phase-shifted currents on the transmitting side feature omnidirectionality. In this article, two transmitter structures, 2-coil and 3-coil systems are discussed compared. These produce field magnitude regardless locations receiving provided that point center sphere at same distance. simulation platform...

We present a case for FPGA-accelerated edge processing low-power Internet-of-Things (IoT) devices, using time series similarity search as driving application. As the data collection capabilities of IoT device increase, primary constraint on their capacity is becoming resource requirements wirelessly transferring collected to central repository. This work presents solution this limitation by augmenting with inexpensive, power-efficient FPGA accelerator, which can perform fairly complex mining...

This paper presents an analysis of a magnetic energy harvester operating from high power primary device with substantial current consumption. The existing `transfer window alignment (TWA)' technique that can significantly boost the amount harvested fields is revisited scenario, revealing any shifting transfer passive rectification be suboptimal once side goes beyond certain level. caused by undesirable development flux due to parasitic elements in circuits. A new model predict such issue...

Timing skew between measurement channels can introduce an unacceptable error in power loss and is difficult to quantify, rendering precise in-situ of magnetic essentially unattainable. This article rams the issue head-on by presenting mathematical model for timing developing two methods based on realize direct measurement. The first established analyze effects measured a dc-dc converter. method, called intersection illustrates how unravel entangled relationship actual real circuit with aid...

This paper investigates a neutral-point-less (NPL) multilevel inverter (MLI), namely an H-type inverter, and its active common-mode voltage (CMV) cancellation technique to achieve high-level of electromagnetic interference (CM EMI) noise reduction in comparison with that the conventional three-phase two-level balanced six-phase topologies. The is proposed overcome topological limitation MLIs, which have trade-off relationship between neutral current CMV, where large small vectors produce...

This paper presents a method for enhancing performance of magnetic energy harvester. The harvester operates with magnetically saturating core high permeability. If the saturates, effective magnetizing inductance becomes small, and little power can be harvested from core. Energy is very efficiently during an operating cycle when not saturated, time period we call "transfer window." It shown that location length transfer window are independent each other. Based on this property, alignment...

Superconducting magnetic energy storage (SMES) is an attractive technology for large-scale storage. SMES systems are particularly suitable applications that require high power density. Energy conversion critical components of systems. can be efficient source pulsed applications. For bidirectional transfer between and the load, a Power Conversion System (PCS) essential. Two different electronic schemes reported: reduced IGBT count H-bridges novel DC/DC converter without any H-bridges. The new...

In this paper, a sense amplifier circuit, which aims to operate with 1V or less supply voltage, is presented. While conventional uses inverters connected in cross-coupled manner without any special timing phase, the proposed circuit employs calibration phase provide offset voltage margin relaxation. The relaxed amount can be utilized for lowering Vcore, DRAM core increasing number of Wordlines per Bitline. Also, it used ensuring correct data operations fabricated severer process variation.

The diagnostic machinery monitoring system presented in this paper coordinates the acquisition of vibration and speed estimates for an electric machine. It functions even when machine is "off" or spinning down. This effectively turns into its own mechanical network analyzer. Data from can be used to correlate electrical data order distinguish a variety pathologies mounts. entire sensor powers itself surrounding magnetic fields, requiring no ohmic contact special power wiring. presents unique...

Retrofittable self-powered sensors for machine condition monitoring ease the burden of installation and decision-making maintenance acoustic performance assessment. Terminal box magnetic power harvesting are nonintrusive. They require no special wiring can simultaneously observe correlate important variables diagnostics, including vibration speed. These correlated data be used to detect differentiate imbalances from failing structural mounts, among other possibilities. New hardware...