Materials showing reversible resistance switching between high-resistance state and low-resistance at room temperature are attractive for today’s semiconductor technology. In this letter, the reproducible hysteresis resistive characteristics of metal-CuxO-metal (M-CuxO-M) heterostructures driven by low voltages demonstrated. The fabrication M-CuxO-M is fully compatible with standard complementary metal-oxide process. behavior discussed. good retention exhibited in accurate controlling...

We investigated resistance switching in top-electrode/NiO∕Pt structures where the top electrode was Au, Pt, Ti, or Al. For Pt∕NiO∕Pt and Au∕NiO∕Pt with ohmic contacts, effective electric field inside film high enough to induce trapping detrapping at defect states thus switching. a Ti∕NiO∕Pt structure well-defined Schottky contact Ti∕NiO interface accompanied by an appreciable voltage drop, NiO not Al∕NiO∕Pt low barrier Al∕NiO interface, could be induced higher since drop negligible but small.

This study considers the reduction of force ripple a permanent magnet linear synchronous machine (PMLSM). The PMLSM has relatively large magnetic air gap. Therefore, slotted type stator structure is generally employed. Furthermore, detent force, which caused by energy imbalances owing to interaction between teeth-slot structures and magnets, must be minimized for better start-up performance. in this study, addition auxiliary teeth notching are employed reduce force. In particular, influence...

This paper presents an analysis of the core loss observed in stator a permanent magnet linear synchronous generator. Core is usually calculated using classical Steinmetz equation, but it leads to erroneous results. Consequently, several researchers have proposed modified versions this taking into account hysteresis loss, eddy current and excess loss. In paper, we all coefficients from Epstein test data curve fitting method. Moreover, separated rotating alternating fields based on time...

Linear oscillating actuators (LOAs) are electric machines that perform linear reciprocating motion. Generally, single-phase short-stroke LOAs employ rare-earth permanent magnets (PMs) used. However, they expensive and affected by unstable material supply. Therefore, we proposed a ferrite PM LOA to replace LOAs. In this paper, the structure operation principle of conventional examined. addition, for purpose comparison, models both designed generate same back electromotive force...

This paper presents an evaluation system to experimentally verify the performance of a double-sided linear permanent magnet synchronous generator (PMSG) prototype. In general, research on wave power generation systems has concentrated optimum design technology PMSGs, analysis technology, loss analysis, and technology. Despite active in this field, wherein buoy are linked never been evaluated. Therefore, study, PMSG was used predict buoy's motion derive parameters for optimal under regular...

This paper analyzes the torque characteristics of a magnetic rack-and-pinion gear using an analytical method based on spatial harmonic method. We obtain field distribution due to permanent magnets and derive from Maxwell stress tensor. The results are extensively validated by comparing with finite element analysis results. Finally, we accurate solution reduce time experimentally verify this applying it newly manufactured rack-pinion model.

This paper presents analytical torque calculation and experimental verification of synchronous permanent magnet couplings (SPMCs) with Halbach arrays. A array is composed various numbers segments per pole; we calculate compare the magnetic torques for 2, 3, 4 segments. Firstly, based on vector potential, using a 2D polar coordinate system, obtain solutions field. Next, through series processes, perform calculations derived Maxwell stress tensor. Finally, results are verified by comparison 3D...

This paper compares the characteristics of a double-sided small-scale permanent magnet linear synchronous generator (PMLSG) using three different magnetization arrays. Though PMLSGs generally prefer parallel array, we propose Halbach array and an axial which are widely used in devices. For accurate comparison, output power, mechanical air-gap thickness, overall size all equal. On basis analytical two-dimensional field solutions, this study predicts magnetic fields, losses, masses, powers The...

This study investigates the design and characterization of a permanent magnet torque motor with limited operating range. The method configuration that satisfy range at specific applied current were determined. was designed analyzed through finite element analysis. then fabricated, an experimental setup constructed to measure various rotation angles different currents. Approximate values obtained by comparing measured results, characteristics limited-angle rotary analysis verified.

본 논문은 양측식 슬롯리스 고정자 할박 배열 영구자석 선형 발전기의 발전특성해석을 하였다. 자기 벡터자위와 맥스웰 방정식 이용하여 지배방정식을 도출하고, 특히 자화와 권선의 전류밀도 분포는 무한 푸리에 급수을 모델링 도출된 지배방정식으로부터, 및 권선에 의한 자계 특성식과 역기전력, 저항, 인덕턴스와 같은 회로정수를 도출 발전 특성 해석 결과는 유한요소 해석법과 비교하여 매우 잘 부합함을 확인함으로 그 타당성이 검증되었다. This paper deals with the generating characteristic analysis of permanent magnet linear generator (PMLG) double-sided Halbach array mover and three phases concentrated stator windings by using analytical method. On basis a magnetic vector potential...

This study analyzes and verifies the electromagnetic performance thrust characteristics of linear magnetic gears using subdomain-based analytical methods. By simplifying model, governing equations each domain are calculated based on Maxwell equation. In addition, undetermined coefficients derived four boundary conditions. gears, where power transmission is important, force also important. The were stress tensor.

Magnetic gears (MGs) are energy converters that have recently received attention because of their advantages over conventional mechanical gears. Prior studies focused on MGs without losses, and research linear has tubular structures. Therefore, in this study, we analyzed the electromagnetic characteristics materials used flux-modulation poles. In addition to comparing each material, an equivalent stress analysis was performed. Finally, proposed model fabricated, experimental verification

This paper describes the eddy current loss analysis of a double-sided cored slotless-type permanent magnet linear synchronous generator using space harmonic method. To calculate current, an analytical solution was derived by applying Maxwell equation, magnetic vector potential, and Faraday’s law in two-dimensional (2-D) Cartesian coordinate system. Based on armature reaction field distribution produced winding we obtained for density distribution. Then, induced (PM) equivalent electrical...

This paper presents a comparison of efficiency and mover mass on double-sided permanent magnet linear synchronous generator (PMLSG) according to its magnetization pattern. When PMLSG has lighter mover, it advantages such as lower cost other aspects regarding mechanical losses. In general, PMLSGs are used with vertical PM pattern, but we propose horizontal pattern in this because the does not need back-iron for magnetic path. Electromagnetic field analysis is especially essential when...

Induction generators are widely used for hydro power generation as they both economical and durable. Accurate temperature prediction is important induction because has a large impact on durability efficiency. In this study, the characteristics of an generator, according to stator loss distribution, were analyzed verified through experiments. The no-load analysis core generator carried out, losses distributed each element thermal analysis. experiments conducted under condition, was performed...

This paper deals with analytical and experimental study of permanent magnet linear synchronous machines horizontally magnetized magnets. Six subdomains are defined as analysis domains considering end effects, slotting flux pass iron poles. The governing equations for each domain derived from the Maxwell equation constitutive relations in electromagnetic theory, second-order differential calculated by using Sturm-Liouville theory. By applying boundary conditions, solutions area derived,...

This paper deals with analysis of armature reaction magnetic field linear generator three phases coreless/cored type concentrated winding. On the basis a vector potential and Maxwell’s equations, governing equations to predict are derived, current density modeling is also performed analytically by using Fourier series expansion. The analytical method used in this confirmed comparing finite element results.

본 논문은 파력에너지 변환용 양측식 슬롯티드 타입 선형 발전기의 디텐트력 저감을 위한 방법을 제시하였다. 발전기는 비교적 큰 공극을 갖는다. 그렇기 때문에 일반적으로 선형기는 슬롯 구조를 이때의 디텐트력은 치/슬롯과 영구자석 사이에 발생하는 힘으로 불필요한 에너지원으로 작용한다. 따라서, 논문에서는 슬롯구조를 갖는 기기의 디텐트력을 줄이기 세가지 방법인 보조치, 노치적용을 제시하고 유한요소해석법을 이용하여 연구의 타당성을 입증하였다. This study considered the reduction of detent force a permanent magnet linear synchronous generator (PMLSG). The PMLSG has relatively large magnetic air gap. Thus, slotted type stator structure is generally employed. Furthermore, force, which caused...

This paper presents a comparative analysis of double-sided permanent magnet linear synchronous generator (PMLSG) with different magnetic circuits using electromagnetic transfer relations. The magnetizations for vertical and Halbach arrays are derived Fourier series expansion. Based on Maxwell's equations, governing equations each case, relation matrices obtained. fields produced by PMs the armature reaction calculated. In order to analyze generating behavior, an equation calculating induced...

This paper compares the characteristics of a double-sided small-scale permanent magnet linear synchronous generator (PMLSG) operating with three different magnetization patterns. First, in this paper, we determine vertical array. Second, derived Halbach and horizontal Finally, analysis results are verified by using from experiments.

This study aims at developing a tissue-specific model for glycolysis in bovine mammary gland epithelial cells by incorporating gene expression data into metabolic reactions. Two types of sets were embedded the COnstraint-Based Reconstruction Analysis (COBRA) toolbox: reactions that overlay genetic information human from public database and cattle acquired lab experiments. As result, we successfully generated cells, providing on pathways annotations still required curation.