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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
Abiezer Tejeda1, Seho Kim1, Fei Yang Lin1, Grant A. Covic1, John T. Boys1 
TL;DR: In this paper, the authors proposed a hybrid solenoid for wireless charging applications, which is able to transfer high power over large air gaps and is tolerant to lateral displacements suitable for electric vehicle charging applications.
Abstract: This paper introduces a primary pad for wireless charging applications, which is able to transfer high power over large air gaps and is tolerant to lateral displacements suitable for electric vehicle charging applications. The developed pad is an improved solenoid designed specifically to address issues such as flux leakage and loss while retaining good coupling. It is a hybrid structure that consists of a combination of rectangular- or square-shaped coils and a central solenoid, all connected in series. When energized, it produces a single-sided, polarized flux similar to the flux pattern of the solenoid and double D (DDP) pads. The power transfer capability of this pad is investigated through finite-element analysis simulations. The results are compared first to a similar sized solenoid from which it was derived, and also a DDP primary pad and are verified through measurements on prototype systems in the laboratory. The aim of this paper is to provide an improved hybrid solenoid pad showing higher coupling factors and lower stray field emissions with a performance (coupling and stray field emissions) similar to that of DDPs.

36 citations

Patent
29 Dec 1993
TL;DR: In this paper, a non-invasive apparatus and a method adapted for testing solenoid valves to verify valve operation is described. But this method is not suitable for the verification of valve operation.
Abstract: A non-invasive apparatus and method is disclosed which is adapted for testing of solenoid valves to verify valve operation. The non-invasive apparatus and method monitors with time both the stroke of the solenoid valve plunger to identify associated impacts and the state of the solenoid valve as being energized or de-energized to determine valve operability.

36 citations

Patent
27 Jan 2010
TL;DR: In this article, a switchgear operating mechanism has a roller pin rotatably fixed to a leading end of a latch lever, and the latch lever is rotated by a biasing force of the roller pin.
Abstract: According to an embodiment, a switchgear operating mechanism has a roller pin rotatably fixed to a leading end of a latch lever. A latch is fixed to a solenoid lever at a position different from the rotation axis of the solenoid lever, and has a leading end engageable with the roller pin. In a state where the switchgear operating state is shifted from the closed state to the cutoff state, the solenoid lever is pushed by an electromagnetic solenoid for cutoff so as to be rotated in an opposite direction to the biasing direction of the solenoid lever return spring, and the latch lever is rotated by a biasing force of the roller pin to release an engagement between the roller pin and the leading end of the latch, which causes a cutoff spring to discharge its energy to rotate the latch lever.

36 citations

Journal ArticleDOI
M. Benz1
TL;DR: In this paper, the authors proposed two techniques for high-field superconducting solenoids: 1) the conductor is initially fabricated from Nb and Sn in an unalloyed configuration, and this conductor is then wound into a solenoid and converted to Nb 3 Sn by heat treatment of the entire soleneoid; 2) the alloyed Nb3 Sn conductor is prepared in a very thin configuration.
Abstract: The properties that make Nb 3 Sn an outstanding material for use in high-field superconducting solenoids are its high critical temperature (18.1°K), its high critical current density (in excess of 200 000 A/cm2at 100 kG and 4.2°K), and its high critical field (221 kG at 4.2°K). Since Nb 3 Sn is a brittle material, special techniques are required for its use. These techniques fall into two groups : 1) the conductor is initially fabricated from Nb and Sn in an unalloyed configuration, and this conductor is then wound into a solenoid and converted to Nb 3 Sn by heat treatment of the entire solenoid; 2) the alloyed Nb 3 Sn conductor is prepared in a very thin configuration. Thus, although it is brittle, it is still flexible enough to be wound directly into a finished solenoid. Extensive experimentation with the second technique has been undertaken and will be discussed with particular emphasis on the properties of laminated conductors as confirmed by performance of superconducting solenoids.

36 citations

Journal ArticleDOI
Junzhi Zhang1, Chen Lv1, Xiaowei Yue1, Yutong Li1, Ye Yuan1 
TL;DR: A linear relationship between limited pressure difference and coil current of an on/off valve in its critical closed state is proposed and illustrated, which has a great potential to be applied to improve hydraulic control performance.
Abstract: On/off solenoid valves with PWM control are widely used in all types of vehicle electro-hydraulic control systems respecting to their desirable properties of reliable, low cost and fast acting. However, it can hardly achieve a linear hydraulic modulation by using on/off valves mainly due to the nonlinear behaviors of valve dynamics and fluid, which affects the control accuracy significantly. In this paper, a linear relationship between limited pressure difference and coil current of an on/off valve in its critical closed state is proposed and illustrated, which has a great potential to be applied to improve hydraulic control performance. The hydraulic braking system of case study is modeled. The linear correspondence between limited pressure difference and coil current of the inlet valve is simulated and further verified experimentally. Based on validated simulation models, the impacts of key parameters are researched. The limited pressure difference affected by environmental temperatures is experimentally studied, and the amended linear relation is given according to the test data.

36 citations


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