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Solenoid

About: Solenoid is a research topic. Over the lifetime, 19278 publications have been published within this topic receiving 114721 citations.


Papers
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Journal ArticleDOI
TL;DR: In this article, the authors describe a method for modeling high speed on/off valves, focusing on the nonlinearities of the electromagnetic, fluidic, and mechanical domains, specifically within solenoid driven poppet style valves.
Abstract: The goal of this paper is to describe a method for modeling high speed on/off valves. This model focuses on the nonlinearities of the electromagnetic, fluidic, and mechanical domains, specifically within solenoid driven poppet style valves. By including these nonlinearities, the model accurately predicts valve transition time for different driving voltages and valve strokes. The model also predicts fluid transients such as pressure ripple. Unique attributes of the model are the inclusion of the effect of eddy currents and fringing while still being fully coupled with the fluid and mechanical domains. A prototype was constructed and used to experimentally validate the model. By developing accurate lumped parameter models, valve dynamics can be applied to hydraulic systems to accurately capture their dynamics.

24 citations

Journal ArticleDOI
TL;DR: In this article, a six-beam klystron was designed to produce a total current of 132 A divided equally among the six beams at an accelerating potential of 115 kV.
Abstract: This paper presents the detailed design of a six-beam gun for use in an L-band 10-MW multiple-beam klystron. To facilitate the gun simulation, we developed a joint design methodology with 2-D and 3-D simulation codes. The six-beam gun is designed to produce a total current of 132 A divided equally among the six beams at an accelerating potential of 115 kV. For the design of the gun, special emphasis is placed on the geometric layout of the electrodes to ensure moderate voltage gradient, accurate beam perveance and reasonable cathode loading. The magnetic circuit consists of solenoid magnet structures. Special coils and iron shells are set to ensure a uniform parallel magnetic field in the region between the cathode and the anode. Two set of amendatory coils and shield irons are set in the transition region to optimize the beam radius. Special coils are set in the both ends of the interaction region to trim the radial magnetic fields. The gun design is accomplished with EGUN and CST codes. Simulation results show that the joint design methodology is effective and the magnetic circuit has an excellent flexibility. The final gun has a cathode loading lower than 2.1 A/cm2 and excellent beam transport characteristics. The dependency relationship between the beam off-centering and the asymmetry radial magnetic fields is analyzed.

24 citations

Journal ArticleDOI
TL;DR: In this article, a generalized plane strain (GPS) condition for axial strain was introduced on the assumption that the deformation of a solenoid from a right circular cylinder is small.
Abstract: A stress analysis of superconducting solenoids is presented which includes a generalized plane strain (GPS) condition for the axial strain. The GPS condition is introduced on the assumption that the deformation of a solenoid from a right circular cylinder is small. The GPS assumption results in an analytic solution for all three components of stress and strain in a solenoid. The work is presented in the context of the historical development of stress analysis for solenoids. The general stress equations for a magnetic solenoid are formulated. The relationship between a right cylinder deformation and the generalized plane strain condition is examined for the physical conditions in the central region of a solenoid magnet. The general analytic solutions of the stress equations are given for the cases of magnetic and thermal loading. The constant coefficients are determined for cases of common interest in solenoid magnet design. The analytic results are compared with numerical analysis results for an example s...

24 citations

Patent
Masahiko Yakuwa1, Iijima Hideto1
15 Jan 1988
TL;DR: In this paper, a current detector for use with a pulse-driven electromagnetic actuator drive circuit is described, which operates by use of a solenoid current detection resistor to sample an instantaneous sensor current value at intervals of a predetermined pulse voltage period, and calculates the average current value for the sensor based on the sampled value.
Abstract: In a current detector for use with a pulse-driven electromagnetic actuator drive circuit, a solenoid current detector is disclosed which operates by use of a solenoid current detection resistor to sample an instantaneous solenoid current value at intervals of a predetermined pulse voltage period, and calculates the average current value for the solenoid by calculation based on the sampled value.

24 citations

Patent
12 Jun 2001
TL;DR: In this article, the authors propose a fail-safe mechanism for circuit breakers, which includes a solenoid that is electrically connected to be energized in response to a failure in the electronic trip circuit.
Abstract: A circuit breaker includes a pair of separable contacts forming a pole, an operating mechanism for operating the electrical contacts, an electronic trip circuit responsive to currents flowing through the pole for operating the operating mechanism in response to predetermined current conditions to open the separable contacts, and a fail-safe mechanism for operating the operating mechanism in response to a failure in the electronic trip circuit. The fail-safe mechanism includes a solenoid that is electrically connected to be energized in response to a failure in the electronic trip circuit and a linkage that operates the operating mechanism in response to operation of the solenoid. An operating arm that moves in response to the solenoid, interacts with operating mechanism to prevent resetting of the operating mechanism following actuation of the solenoid.

24 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023144
2022292
2021230
2020404
2019459
2018596