Abstract With a recent increase in interest metal-gas batteries, the lithium-carbon dioxide cell has attracted considerable attention because of its extraordinary carbon dioxide-capture ability during discharge process and potential application as power source for Mars exploration. However, owing to stable lithium carbonate product, enables operation only at low current densities, which significantly limits batteries effective cells. Here, we investigate high-performance using quinary molten...

This article describes a method to reduce electromagnetic interference (EMI) components at odd harmonic frequencies of wireless power transfer (WPT) system. In WPT system, leakage magnetic field is generated, which may adversely affect the human body or other electronic devices. The previous reactive shielding could field, but it has disadvantage reducing efficiency (PTE). By using frequency split phenomena, can EMI with increasing PTE. this article, that while PTE proposed. Specifically,...

This article proposes a method of extracting the coupling coefficient and resonant frequency receiving (Rx) side wireless power transfer system with an <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">LCC</i> -series topology, using only information from transmitting (Tx) side. The proposed has three modes, which allow Tx coil Rx inductance to be extracted, respectively. can calculated while considering tolerance coils. senses current, is...

This paper proposes a reactive shield structure to reduce the leakage magnetic field of wireless power transfer (WPT) system with dipole coil structure. The resonates at frequency lower than that WPT and operates in an inductive region where reactance is positive. Therefore, generated by 180° different phase from transmitting coil, resulting effective reduction field. methodology for designing mathematically analyzed, current phases are compared. Its effectiveness has been validated through...

Recently, maintenance applications around power lines have been actively studied. These usually supply through magnetic energy harvesting(MEH) to devices the line. A major challenge for practical MEH is overcome saturation, which can cause degradation of density under a wide current range in In this paper, we propose design methodology harvest maximized output by considering saturation effect. To consider model and saturable magnetizing inductance based on were comprehensively analyzed....

For the wireless power transfer (WPT) system in implantable medical devices (IMDs), human tissue is positioned between transmitting and receiving coils which are different from general WPT systems. Because this space where strongest electromagnetic field (EMF) occurs, it essential to reduce EMF at interspace exposure EMF. In paper, an out-of-phase coupled for IMDs proposed Considering efficiency (PTE) of system, a design procedure determining phase difference each capacitor analyzed...

In this article, we propose and analyze a through silicon via (TSV) with dioxide well (SDW) to reduce leakage current in the design of high-speed signaling low-power consumption high-bandwidth memory (HBM) interface. proposed TSV, SDW is inserted into substrate area between TSVs. By inserting SDW, substrate's effective conductivity permittivity are lowered compared conventional TSV. The TSV improves insertion loss by up 0.079 dB at 4 GHz minimizing current. addition, reducing substrate,...

Wireless Power Transfer (WPT) system are used in many areas due to their advantages such as safety, aesthetics, and convenience. The WPT being applied not only smartphones that common around us, but also various electronics medical devices. In particular, the case of Electric Vehicle (EV), researches steadily underway apply solve problem battery dependence. Inductive power transfer (IPT) is most popular method using magnetic field. However, Foreign Object (FO) can be heated by strong field...

This article analyzes the characteristics of harmonic components in wireless power transfer (WPT) systems depending on load <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">LCC</i> -S topology. In a WPT system, equivalent can be changed charging state. Depending load, operation rectifier divided into two modes. The first is continuous conduction mode (CCM), and second discontinuous (DCM). CCM DCM were each analyzed. electromagnetic field (EMF)...

Wireless power transfer (WPT) technology has been applied to fields as diverse medical, electronic devices and transportation because of its convenience, safety aesthetics. In particular, electric vehicles (EVs) that have emerged replace internal combustion engines, which cause environmental pollution problems, are most suitable for applying WPT. Not only does convenience increase by eliminating charging cables, but the issue heavy batteries can also be resolved using dynamic WPT technology,...

This paper analyzes how over-coupled coils affect odd harmonic current and electromagnetic interference (EMI) in a wireless power transfer (WPT) system, proposes design considerations for series inductors to solve the EMI problem. When air gap of WPT system decreases below certain level are over-coupled, component input impedance currents increase. The increase components quickly aggravates issues. To problem additional were applied designing analyzed. inductors, efficiency, maximum...

In this paper, we propose a method of wirelessly torque transfer (WTT) and power (WPT) to drug pump, one implantable medical devices. By using the magnetic field generated by WPT system receiving coil at same time, applications that previously used from battery can be operated without battery. The proposed uses with material as motor, generate in desired direction transmitting coil. was analyzed topology generates constant current for stable generation. addition, detecting position...

With advancements in the field of electrical engineering, various low-power portable electronic devices have been commercialized. To eliminate and unify different types cables, inductive wireless power transfer (WPT) technology, which uses magnetic fields to energy, is being applied numerous applications. Low-power typically small coils loads, leading low efficiency even over short distances. Magnetic materials such as ferrites are used improve (PTE). It well known that high-permeability...

In this paper, we propose a method to reduce the leakage magnetic field from wireless power transfer (WPT) systems with series–series compensation topology by adjusting phase difference between transmitter (TX) coil current and receiver (RX) without additional shielding coils or materials. A WPT system employing proposed adjusts TX RX tuning resonant capacitor of coil. The conditions for minimizing are derived, range RX, considering efficiency field, is proposed. Through simulations...

This paper proposes a shielding sensor (SS) coil to solve the misalignment issue and leakage magnetic field of wireless power transfer (WPT) system for electric vehicles (EVs). The must be solved because they can cause problems with efficiency reduction electronic device malfunction. To these problems, proposed SS coils are located over Tx coil. newly created mutual inductance between is used detect receiver in In addition, current phase adjusted through impedance control reduce field. were...

This paper proposed EMI reduction method for over-coupled wireless power transfer (WPT) system using seriesnone (SN) topology. The series-none topology does not has the compensation capacitor minimizing reactive of receiver side. higher input impedance than conventional series-series (SS) topology, resulting in odd harmonic components current SN lower that SS In addition, when over-coupling phenomena occurs, there is much difference efficiency transferring compared to verified through 3D EM...

The paper proposed a method for determining the current ratio of coils that maximizes coil-to-coil power efficiency in wireless transfer system with double-sided LCC topology. In previous study, when rated input and load were determined, output currents determined topology, but could be freely determined. this paper, parallel capacitors on transmitting receiving sides was to minimize losses through this, coil arranged formula analysis, it proved simulation designed has maximum value.

Recently, research on applying wireless power transfer (WPT) technology has been actively conducted to improve the stability and convenience of implantable medical devices (IMD) inserted into human body for direct treatment diseases. However, in case WPT system IMD, misalignment is likely occur due miniaturization receiving coil difficulty locating coil. In this paper, we propose a alignment method using permanent magnets (PM). The effect analyzed terms efficiency electromagnetic field...

Missiles mounted on maritime vessels have two types of loads. One is the operating load consumed just before launch, and other safety sensors that must always be activated for safety. Because consumes a large power capacity, generated by vessel's own generators supplied. Meanwhile, loads are supplied through an energy storage system (ESS) because with even when stop. However, voltage difference between ESS reaches ten times or more. Therefore, there problem in input sources transferred to...

This paper presents a method to improve the Vehicle-to-Everything (V2X) security. With recent rapid development of communication technology and traffic applications, V2X is recently commercialized has been growing as fundamental system for future applications. Because high mobility vehicles, requires low latency high-reliability. However, previous security methods demand large computational burden generate owing complex operations long additional data bits ensuing To resolve such...

The paper proposed a LCL-LCL topology for reduction of odd harmonic magnetic fields in over-coupled WPT system. has simple structure adding inductors series to the conventional series-series (SS) topology. higher input impedance at odd-harmonic frequencies than one, resulting small currents and fields. effectiveness is proven by simulation experiments.

In wireless power transfer systems, the leakage magnetic field must be kept below a certain specified value, as it can affect human body or electronic devices in vicinity. Consequently, many studies have been conducted to reduce fields systems. This paper aims minimize generation of unnecessary by arranging multiple transmitter coils and activating only specific that correspond position size receiver coil. It analyzes magnitude current depending on number activated resulting field, discusses...

This paper presents the recent advancements in Wireless Power Transfer (WPT) technology, along with associated safety issues and solutions. The WPT which transmits power without traditional wires, is being applied various fields, such as smartphones, medical equipment, electric vehicles. However, proliferation of concerns exposure to electromagnetic heat generation, interference between devices have emerged. Therefore, this introduces latest research trends related technological aimed at...