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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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Patent
09 Apr 1956

28 citations

Patent
15 Nov 1984
TL;DR: In this paper, a failsafe circuit is used to deenergize the proportional solenoid of a car's steering mechanism in case of shortcircuit or failure of an electric control circuit.
Abstract: A power steering control apparatus for a car in which, under normal conditions, the steering becomes heavy as the speed of the car increases for the purpose of safety. This is realized by means of a hydraulic valve controlled by the reaction oil pressure of a proportional solenoid in the steering mechanism. In an abnormal condition such as the shortcircuit between solenoid coils or the failure of an electric control circuit, the proportional solenoid is deenergized through a failsafe circuit due to the fact that a feedback signal from the solenoid has become zero and the error with a high amplification gain between the car speed inverse proportional signal and the feedback signal has exceeded a first predetermined value. On the occasion of the voltage reduction of the power source for the electric control circuit and/or the increased temperature of the proportional solenoid, the failsafe circuit is disabled by an error protection circuit only when the difference between the car speed inverse proportional signal and the reduced feedback signal exceeds a second predetermined value.

28 citations

Patent
19 Oct 1994
TL;DR: A self-holding type solenoid valve has an exciting coil 1 and an exciting circuit that switches the direction of flow of exciting current passing through the coil as discussed by the authors, and a return spring releases the movable iron core away from the stationary iron core.
Abstract: A self-holding type solenoid valve has an exciting coil 1 and an exciting circuit that switches the direction of flow of exciting current passing through the coil. When a positive exciting current flows through the coil, a movable iron core is attracted to a stationary iron core and held in the attracted position by a self-contained permanent magnet. When a reversed current flows through the coil, a return spring releases the movable iron core away from the stationary iron core.

28 citations

Patent
25 Aug 2004
TL;DR: In this paper, a solenoid gas valve with a moving assembly and inlet and outlet fittings is installed inside a tube and the opening and closing of the valve is operated by the pressure difference with the aid of the magnetic field.
Abstract: A solenoid gas valve having a solenoid assembly and inlet and outlet fittings is installed inside a tube. The opening and closing of the valve is operated by the pressure difference with an aid of the magnetic field. A compression spring is attached to the support cylindrical body and held against the inlet end fitting while a moving solenoid assembly is located inside the support cylindrical body. The moving solenoid assembly that consists of a stop, a flange, a sleeve and an electrical coil, is held by a second compression spring that is attached to the inside of the support cylindrical body. A small moving magnetic rod, slides inside the sleeve of the solenoid assembly. Acted by a third compression spring, the magnetic rod seals the gas outlet through the bleed orifice on the flange of the solenoid assembly.

28 citations

Patent
16 Apr 2009
TL;DR: A superconducting magnet configuration for generating a homogeneous magnetic field B0 in an examination volume is characterized in this paper, where the magnet configuration consists of the main field coil (1), the shielding coil (2), and a ferromagnetic field formation device (3, 18).
Abstract: A superconducting magnet configuration (4; 14) for generating a homogeneous magnetic field B0 in an examination volume (4 b), has an interior radial superconducting main field coil (1) which is disposed rotationally symmetrically about an axis (z-axis) and an oppositely driven coaxial radially exterior superconducting shielding coil (2) is characterized in that the magnet configuration (4; 14) consists of the main field coil (1), the shielding coil (2), and a ferromagnetic field formation device (3; 18), wherein the ferromagnetic field formation device (3; 18) is located at the radially inside of the main field coil (1), the main field coil (1) consisting of an unstructured solenoid coil or of several radially nested unstructured solenoid coils (15, 16) which are driven in the same direction, the axial extent Labs of the shielding coil (2) being smaller than the axial extent Lhaupt of the main field coil (1), wherein the axial magnetic field profile (5) generated by the main field coil (1) and the shielding coil (2) during operation has a minimum of the field strength along the axis (z-axis) in the center (4 a) and a maximum of the field strength on each side of the center (4 a), and wherein the axial magnetic field profile (6) generated by the ferromagnetic field formation device (3; 18) during operation has a maximum of the field strength along the axis (z-axis) in the center (4 a) and a minimum of the field strength on each side of the center (4 a). The magnet configuration in accordance with the invention has a very simple structure.

28 citations


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