Topic
Solenoid
About: Solenoid is a research topic. Over the lifetime, 19278 publications have been published within this topic receiving 114721 citations.
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TL;DR: In this article, the magnetic field of an infinitely long helical solenoid is calculated using a series expansion of the reciprocal distance between the observation point and a variable point of the line current, which is a substitute for the spatial current distribution.
Abstract: This paper presents the calculation of the low-frequency magnetic field of an infinitely long helical solenoid. Helical solenoids can be applied, e.g., to investigate superconducting coils, twisted wires and the levitation of molten metals. With the aid of a series expansion of the reciprocal distance between the observation point and a variable point of the line current, which is a substitute for the spatial current distribution, the magnetic vector potential is calculated. This approach makes is possible to express also the magnetic field in the form of a series. Explicit formulas for the magnetic field inside and outside the solenoid are developed which include modified Bessel functions and their derivatives. Some properties of the magnetic field are shown. >
40 citations
TL;DR: In this paper, an alternative solution for scale control in industrial water processing, and a model device with solenoid coils inserted into a cylindrical kernel inside a pipe is analyzed for potential application at high water flow capacity (few hundreds of m3/h).
Abstract: This paper reviews electromagnetic water treatment, an alternative solution for scale control in industrial water processing, and a model device with solenoid coils inserted into a cylindrical kernel inside a pipe is analyzed for potential application at high water-flow capacity (few hundreds of m3/h). An efficiently strong magnetic field (e.g. with maximum magnetic flux density from 0.1 T to 0.2 T) can be produced using a DC electric supply resulting in total costs at least ten times lower than the expense of the scale-prevention ion exchange.
40 citations
Patent•
VDO1
TL;DR: In this article, a solenoid for use in valves used in evaporative emission control systems, such as canister purge valves or vent solenoids valves, is described, where the valve element is movable between a closed position where the inlet port is closed and an open position where it is opened.
Abstract: A solenoid for use in valves used in evaporative emission control systems, such as canister purge valves or vent solenoid valves. The solenoid includes a housing having an inlet port and an outlet port. The housing further includes a guide element having a bobbin section. A valve shaft is slidably mounted to the guide element, wherein the valve shaft includes a permanent magnet and a valve element. The valve element is movable between a closed position wherein the inlet port is closed and an open position wherein the inlet port is opened. A coil is formed on the bobbin adjacent the magnet. In use, the coil generates directional magnetic fields oriented to cause the magnet to be repelled to move the valve element to the open position and oriented to cause a magnetic attraction with the magnet to move the valve element to the closed position.
40 citations
TL;DR: A description is given of ANTIC85, a powerful and user-friendly finite-element-based magnetic field analysis package used for the design and analysis of electromechanical devices for automotive applications.
Abstract: A description is given of ANTIC85, a powerful and user-friendly finite-element-based magnetic field analysis package. This program is used for the design and analysis of electromechanical devices for automotive applications. It is applicable to general two-dimensional and axisymmetric three-dimensional static and transient nonlinear magnetic field problems. The unique feature of this package is its ability to solve the coupled power-electronic, mechanical, and magnetic field problem for solenoid actuators. The theoretical basis and structure of this package are presented. Applications to a four-pole 3 kW permanent-magnet starter motor and a variable-reluctance-type speed sensor are shown. >
40 citations
TL;DR: In this paper, an experimental study and mathematical modelling of newly designed vibro-impact moling rig are presented, which is based on electro-mechanical interactions of a conductor with an oscillating magnetic field.
Abstract: In this paper experimental study and mathematical modelling of newly designed vibro-impact moling rig are presented. The design is based on electro-mechanical interactions of a conductor with an oscillating magnetic field. The rig consists of a metal bar placed within a solenoid which is connected to an RLC circuit, and an obstacle block positioned nearby. Both the solenoid and the block are attached to a base board. Externally supplied alternating voltage causes the bar to oscillate and hit the block resulting in the forward motion of the base board mimicking a mole penetration through the soil. By varying the excitation voltage and the capacitance in the circuit, a variety of system responses can be obtained. In the paper the rig design and experimental procedure are explained in detail, and the mathematical modelling of the rig is described. Then the obtained coupled electro-mechanical equations of motion are integrated numerically, and a comparison between experimental results and numerical predictions is presented.
40 citations