This letter proposes a rotation-free wireless power transfer system based on new coil structure to achieve stable output and efficiency against rotational misalignments for charging autonomous underwater vehicles. The has two decoupled receivers composed of reversely wound receiver coils the magnetic flux directions are perpendicular each other, guaranteeing relatively constant total mutual inductance characteristic under misalignments. proposed is verified via finite element analysis ANSYS...

Wireless power transfer (WPT) has attracted much attention in recent years. In an underwater WPT system, the eddy current loss tends to be non-negligible as frequency or coil increases. Thus, it is crucial analyze system. The analytical model of a coreless system seawater established with Maxwell's equations. expressions electric field intensity and are derived. analyzed different circumstances illustrate impacts related factors. For air, there optimum resonant frequency, for higher leads...

Periodontitis is a bacteria-induced inflammatory disease characterized by the progressive destruction of periodontal supporting tissues. Periodontal ligament stem cells (PDLSCs) are capable differentiating into osteoblasts, which an important cell source for endogenous tissue regeneration. Lysine lactylation (Kla) novel post-translational modification proteins that recently thought to be associated with osteogenic differentiation. Here, we found levels reduced both in rats periodontitis and...

Due to the conductivity of seawater, traditional mutual inductance circuit model in air cannot be used directly describe wireless power transfer (WPT) systems seawater applications. This paper proposes a modified an underwater WPT system analyze eddy current loss (ECL) and detuning effect caused by seawater. The time-harmonic electromagnetic field near coil that carries sinusoidal alternating is analyzed. root-mean-square (rms) value phase angle induced voltage on secondary can obtained...

A dual-coupled inductor-capacitor-capacitor and series (LCC-S) compensated wireless power transfer (WPT) system with a compact receiver size is proposed in this paper to improve the misalignment performance achieve fault tolerant operation as well stable output power. The compensation coil main are integrated two decoupled unipolar coils on transmitter side, while they both coupled coil. mutual inductances among have opposite impacts when increase or decrease. Therefore, can remain...

Wireless power transfer systems in seawater inevitably suffer some energy loss as a consequence of eddy current loss. Here, we present coil structure utilizing two transmitter coils placed symmetrically adjacent to each side the receiver coil. This arrangement, termed 1 × structure, yields improved efficiency. The caused by system can be reduced roughly half that system, with one and experimental results show efficiency from is nearly 10%. After introduction equivalent impedance into...

The extracellular matrix (ECM) is a complex mixture composed of fibrillar collagens as well additional protein and carbohydrate components. Proteoglycans (PGs) contribute to the heterogeneity ECM play an important role in its structure function. While small leucine rich proteoglycans (SLRPs), including decorin lumican, have been studied extensively mediators collagen fibrillogenesis organization, function large PGs matrices less known. In this study, we showed that different distinct roles...

An underwater wireless power transfer system with a curly coil structure is proposed to adapt the cylindrical symmetric hull of autonomous vehicles (AUVs). The unipolar and bipolar coils are optimised minimise weight receiver same output power. It revealed that has heavier than structure. However, electromagnetic field radiation in AUV much smaller structure, which means influence on electronics components AUV. Therefore, adopted for prototype. series−series (SS) double‐sided...

Wireless Power Transfer (WPT) for autonomous underwater vehicles (AUVs) has been a research focus in recent years. This paper studies the inductor-capacitor-capacitor and parallel (LCC-P) compensation topology to achieve compact receiver AUVs. Unlike series-series (SS) topology, LCC-P retains advantages of double-sided LCC more than with fewer elements used on side. The analytical model such WPT system is established analyze output power transfer efficiency. higher efficiency compared SS due...

In this article, a multiload wireless power transfer (WPT) system is proposed for the supply of autonomous underwater vehicle (AUV) cluster system. The segmented arc solenoid transmitter coil designed to generate concentrated magnetic field. adjacent coils are reversely wound form strengthened field, which can improve coupling between and receiver. structure verified via finite element analysis based on ANSYS Maxwell. performance analyzed it found that efficiency be maximized against voltage...

Piperine (PPR) is the representative alkaloid component of piper species (family: Piperaceae). Our rapid screening study found PPR caused time-dependent inhibition cytochrome P450s (CYP) 3A and 2D6, CYP3A was inactivated most. Further demonstrated that a time-, concentration-, NADPH-dependent inhibitor CYP3A, significant loss (49.5% ± 3.9%) activity observed after 20minute incubations with 80 <i>μ</i>M at 37°C. The values <i>K</i>_I <i>k</i>_inact were 30.7 0.041...

Underwater wireless power transfer (WPT) has gained a lot of popularity in recent years. In the seawater environment, electrical conductivity is non-negligible compared with that air. Therefore, eddy current loss generated by high-frequency alternating currents coils. The aligned coils been analyzed while misaligned not explored yet, which crucial because are more common practical applications. this paper, an analytical model for coreless WPT system misalignments established Maxwell’s...

To avoid the electromagnetic hazard (EMH) that exists in wireless power transfer (WPT) systems and ensure human safety, this paper proposes a normalization method of delimiting EMH region (EMHR) WPT systems. The analytic expression field intensity near system is deduced verified. It determined generated by an electrified coil related to radius, turns, current resonance frequency. Based on study reference coil, factors are introduced evaluate corresponding value other coils immediately....

For power supply of autonomous underwater vehicles (AUV), a novel contactless transmission (CPT) system based on the arc electromagnetic coupler (EC) is proposed in this paper. The equivalent circuit model EC established to analyze efficiency theoretically, thus working frequency and load resistance are optimized. Then additional eddy current (AEC) loss analyzed by finite element analysis (FEA) method. Finally, theoretical simulation results verified experiments, which have maximal 82% with...

This article proposes a double-sided inductor-capacitor-capacitor-capacitor matrix (D-LC-CCM) impedance matching network to eliminate the impact of load and mutual inductance variation on inductive power transfer system. A thorough mathematical analysis is conducted control strategy proposed obtain constant current output when vary. When changes, equivalent secondary side can be kept unchanged by adjusting capacitor in receiver, then input voltage achieve simultaneously. The primary remain...

When the wireless power transfer (WPT) system is installed on autonomous underwater vehicle (AUV), there a non-negligible eddy current loss around coupler. The existence of ferrite core causes nonlinear distortion magnetic field, which makes design WPT coupler more complicated and difficult. In this paper, key parameters that affect performance were obtained through calculation finite element analysis (FEA). Then, was parametrically modeled in Maxwell, Non-dominated Sorting Genetic Algorithm...

This article investigates the working principle of inductive power transfer (IPT) system from perspectives electromagnetic field distribution. According to limitations frequency and transmission distance, it is proved in this paper that IPT works near field, where energy density magnetic much stronger than electric field. Therefore, only needs be considered approximate analysis. The mutual inductance model an simplified form model. complex Poynting vector integrated over intermediate...

In order to solve the problem of power transmission efficiency reduction resulting from misalignment in Wireless Power Transfer (WPT) system for Autonomous Underwater Vehicle (AUVs), a novel coupling structure with strong tolerance is proposed. A solenoid coil selected as transmitting coil, and receiving composed dual combined planar coils. The WPT can still maintain stable output under uncertain axial misalignments AUVs. magnetic field distribution proposed analyzed theoretically, distance...

Magnetic resonance wireless power transfer (WPT) in the marine environment can be employed charging system for underwater vehicles. Seawater submersion of a WPT results additional energy loss through eddy current generation. In this paper, by equating input to summation delivered load, consumed transmitter and receiver coil resistances, seawater generation, we developed novel distribution model where equivalent impedances are added into primary secondary side circuits simultaneously...

This article presents a maximum efficiency tracking method for an inductive power-transfer (IPT) system based on Boost dc-dc converter. Impedance matching (IM) is achieved by maintaining the equivalent load impedance to be constant against variations. The expression of optimal corresponding system-transfer derived, and impedance-transfer characteristics converter in both continuous conduction mode (CCM) discontinuous (DCM) are analyzed. duty cycle controlled maintain with extended range DCM...