A Working Air-gap and Magnetic Circuit Topology Analysis based Method for Straightly-Acting Solenoid Valve Design

2021 ◽  
Author(s):  
Xiangdong Feng ◽  
Jiaxin You ◽  
Huimin Liang ◽  
Chenglong Zhou ◽  
Shan Jiang
Keyword(s):  
Magnetic Circuit ◽  
Solenoid Valve ◽  
Air Gap ◽  
Valve Design ◽  
Topology Analysis ◽  
Circuit Topology

scholarly journals Impact of the sleeve thickness on the armature eccentricity in a solenoid valve

2016 ◽  
Vol 65 (2) ◽  
pp. 371-382 ◽  
Author(s):  
Robert Goraj
Keyword(s):  
Magnetic Force ◽  
Magnetic Circuit ◽  
Analytical Calculation ◽  
Calculation Model ◽  
Solenoid Valve ◽  
Air Gap ◽  
Axial Component ◽  
Direct Influence ◽  
Magnetomotive Force ◽  
Equal Zero

Abstract Most studies on solenoid valves (SVs) assumed that the armature is concentrically positioned in the sleeve. Under this assumption the transversal component of the magnetic force is equal zero. The article presents an analytical calculation model for the estimation of the armature eccentricity. Using this model the eccentricity was calculated as a function of the sleeve thickness and the hydraulic clearance between the armature and the sleeve. After finding the eccentricity also the permeance of the radial air gap was calculated. This permeance has a direct influence on the drop of the magnetomotive force in the magnetic circuit and finally influences also the axial component of the magnetic force. In the article a calculation of both transversal and axial components of the magnetic force was carried out and presented in the appendix to the article.

Effects of contact gap on nondestructive evaluation using magnetic measurement for ferromagnetic steel

2020 ◽  
Vol 64 (1-4) ◽  
pp. 969-975
Author(s):  
Hiroaki Kikuchi ◽  
Yuki Sato
Keyword(s):  
Magnetic Flux ◽  
Nondestructive Evaluation ◽  
Effective Permeability ◽  
Magnetic Circuit ◽  
Magnetic Measurement ◽  
Air Gap ◽  
Motive Force ◽  
Hysteresis Curve ◽  
Evaluation Technique ◽  
Ferromagnetic Steel

We investigated effects of contact gap on magnetic nondestructive evaluation technique using a magnetic single-yoke probe. Firstly, we evaluated hysteresis curves and impedance related to permeability of the material measured by a single-yoke probe, when an air gap length between the probe and specimens changes. The hysteresis curve gradually inclines to the axis of the magneto-motive force and magneto-motive force at which the magnetic flux is 0 decreases with increasing the gap length. The effective permeability also decreases with increasing the gap thickness. The incremental of gap thickness increases the reluctance inside the magnetic circuit composed of the yoke, specimen and gap, which results in the reduction of flux applying to specimen.

CARPENTER 430FR SOLENOID QUALITY

Alloy Digest ◽  
1977 ◽  
Vol 26 (3) ◽  
Keyword(s):  
Stainless Steel ◽  
Electrical Resistivity ◽  
Magnetic Circuit ◽  
Iron Alloy ◽  
Heat Treating ◽  
Solenoid Valve ◽  
Magnetic Flux Density ◽  
Magnetic Components ◽  
Electromagnetic Relay ◽  
Core Components

Abstract Carpenter 430FR Solenoid Quality stainless steel is a ferritic chromium-iron alloy developed especially for A.C. and D.C. magnetic circuit applications such as solenoid valve core components and electromagnetic relay cores. The electrical resistivity of 430FR is approximately 25% higher than other commercially available 430F stainless. Increased electrical resistivity provides better performance of magnetic components, particularly at power frequencies and high magnetic flux density. This datasheet provides information on composition, physical properties, and hardness. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-337. Producer or source: Carpenter.

Failure Mechanism Analysis of Electromagnetic Relay under Mechanical Impact

2013 ◽  
Vol 473 ◽  
pp. 39-45 ◽  
Author(s):  
Guo Wei Zhao ◽  
Yong Chen ◽  
De Yong Li ◽  
Bin Tang
Keyword(s):  
Failure Mechanism ◽  
Magnetic Circuit ◽  
Impact Damage ◽  
Engineering Application ◽  
Air Gap ◽  
Mechanism Analysis ◽  
Mechanical Impact ◽  
Electromagnetic Relay ◽  
Electromagnetic Relays ◽  
The Impact

The aim was to analyze failure mechanism of electromagnetic relay caused by mechanical impact. The principle of electromagnetic relays was studied and the effect of mechanical impact on electromagnetic relays was analyzed in this paper. Based on the established magnetic circuit model, the relationship of the magnetic field strength, the electromagnetic attraction and the impact damage degree was studied. Then, the damage intensity of mechanical impact on magnetic circuit was decided. Afterwards, the structure of electromagnetic relays was improved, and the mechanical impact simulation was studied by ANSYS. The results show that the uncontrollability of electromagnetic relay is mainly caused by air gap, which is aroused by mechanical impact; in addition, the size of air gap is inversely proportional to electromagnetic attraction force. Moreover, the improved structure of relays can increase impact resistance and broaden the scope of engineering application of electromagnetic relay.

Influence of Load and Air Gap Dimension on Magnetic Field and Magnetic Circuit Design of a Hightorque Stepmotor

1995 ◽  
pp. 343-346
Author(s):  
Wagner Juraj ◽  
Maga Dušan ◽  
Guba Roman ◽  
Führichová Renáta ◽  
Opaterný Jozef
Keyword(s):  
Magnetic Field ◽  
Circuit Design ◽  
Magnetic Circuit ◽  
Air Gap

scholarly journals Circuit Topology Analysis of Polymer Folding Reactions

2020 ◽  
Vol 6 (6) ◽  
pp. 839-847 ◽  
Author(s):  
Maziar Heidari ◽  
Helmut Schiessel ◽  
Alireza Mashaghi
Keyword(s):  
Topology Analysis ◽  
Circuit Topology ◽  
Polymer Folding

A Spinner Magnetometer for Susceptibility Anisotropy in Rocks

1975 ◽  
Vol 12 (8) ◽  
pp. 1448-1464 ◽  
Author(s):  
P. C. Boetzkes ◽  
D. I. Gough
Keyword(s):  
Permanent Magnets ◽  
Magnetic Circuit ◽  
Air Gap ◽  
Johnson Noise ◽  
High Precision Measurement ◽  
Specimen Holder ◽  
A Value ◽  
Bulk Susceptibility ◽  
Weakly Magnetic ◽  
Nyquist Noise

The study of rock fabric through the anisotropy of magnetic susceptibility requires instruments capable of high-precision measurement of weakly magnetic sedimentary rocks. The magnetometer here described is such an instrument. The rock specimen spins on a shaft in an air-gap in a closed magnetic circuit of permalloy with barium ferrite permanent magnets. The air-gap is designed to apply to the rotating specimen a very uniform flux density with a value of 0.115 tesla when the magnets are saturated. Magnetizing coils integral to the transducer are used to magnetize or demagnetize the permanent magnets. Coils in the specimen gap detect specimen magnetization parallel and perpendicular to the applied field. The magnetic circuit forms a balanced bridge and allows alternative modes of transduction. The design is such that Nyquist noise is the largest noise contributed by the magnetic circuit and is smaller than the Johnson noise from the detector coils. Measured noise from the completed transducer is only 4.7 dB above the Johnson noise. The limiting sensitivity is, however, set by the time variation of anisotropy signal from the shaft and empty specimen holder. This limit is at 1.5 × 10−9 mksu (1.2 × 10−10 emu/cm3), so that relative anisotropy of 0.01% can be detected in a weakly magnetic sandstone of bulk susceptibility 1.5 × 10−5 mksu. Calibration is discussed and sample measurements are presented. Construction of the transducer required solution of many technological problems, of which the greatest was encapsulation to suppress all vibration of parts without strain-induced loss of permeability of the permalloy. The more important of the solutions found are outlined briefly.

Dynamic Analysis of Core Magnetic Circuit of Direct Action Solenoid Valve

2010 ◽  
Author(s):  
Qianfeng Liu ◽  
Hanliang Bo ◽  
Benke Qin
Keyword(s):  
Electromagnetic Force ◽  
Magnetic Force ◽  
Magnetic Circuit ◽  
Direct Action ◽  
Hydraulic Drive ◽  
Ring Structure ◽  
Solenoid Valve ◽  
Seal Ring ◽  
Control Rod ◽  
The One

Control rod hydraulic drive mechanism (CRHDM) is a newly invented patent with Institute of Nuclear and New Energy Technology Tsinghua University which owns CRHDM’s independent intellectual property rights. The combined valve which is made up of three direct action solenoid valves is the key part of this technology, so the performance of the solenoid valve directly affects the function of the integrated valve and the CRHDM. The core magnetic circuit of 8 types of the direct action solenoid valve is analyzed using the ANSYS software with various voltages, the results of which are validated by experiments. It shows that the magnetic force increases and time shortens with the increasing voltage. What’s more, under the same condition, the electromagnetic force of the solenoid valve with cone armatures increases much faster than the one of flat armatures, however, the electromagnetic force of the latter is bigger than the former when the force is steady. Furthermore, different shaped interfaces of the seal ring structure between armatures lead to different results. Especially, the electromagnetic force of the solenoid valve with the flat armatures which has seal ring increases faster than the one which does not have this structure, but the result is opposite when it is the solenoid valve with the cone armatures. At last, the subsection structure of magnetic material accelerates the magnetic force sharply.

scholarly journals Improving the Efficiency of Induction Heating in the Air Gap of the Magnetic Circuit

2020 ◽  
Vol 4 (4) ◽  
Author(s):  
Vladimir L. Lanin ◽  
Evgeniy Ratnikau ◽  
Alexander D. Hatskevich
Keyword(s):  
Edge Effect ◽  
Induction Heating ◽  
Edge Effects ◽  
Electrical Resistance ◽  
Eddy Currents ◽  
Magnetic Circuit ◽  
Experimental Studies ◽  
Air Gap ◽  
Secondary Circuit ◽  
Small Parts

Improving the efficiency of induction heating of parts in the air gap of the magnetic circuit is associated with the use of surface and edge effects. Through modeling in ANSYS Electromagnetics Suite 19.2 and experimental studies identified patterns of edge effect in the heated parts. To ensure the uniformity of induction heating of small parts and reduce the soldering time, the electrical switch of soldered parts is used, which with the help of device controller forms a secondary circuit with low electrical resistance and high density of eddy currents.

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