Part 2: Model a Linear Electromagnetic Plunger with a Blocker

Nirmal Paudel | June 14, 2016

In the previous part of our Electromagnetic Device series, we showed you how to model a linear electromagnetic plunger attached to a spring and damper and compute the position, velocity, and electromagnetic forces. Here, we will demonstrate an actuator that includes a blocker/stopper to restrict linear motion. We will also discuss how to model the contact and release of this actuator using the Events, Magnetic Fields, Moving Mesh, and Global ODEs and DAEs interfaces.

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Nirmal Paudel | June 7, 2016

An electromagnetic plunger is an electromechanical device that converts electrical energy into a linear mechanical motion. This motion can be used to move an external load such as closing electromagnetic valves and closing or opening electromagnetic relays. In this blog post, we introduce a procedure to model the behavior and dynamics of an electromagnetic plunger that consists of a multi-turn coil, magnetic core, nonmagnetic guider, and magnetic plunger.

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Jiyoun Munn | June 1, 2016

The 5G mobile network and Internet of Things (IoT) are two hot topics in the RF and microwave industry. New developments in these wireless applications call for much higher data rates, active electronically scanned arrays (AESA), phased array antennas, and multiple-input-multiple-output (MIMO) technology. It is important to reduce the time and cost during the process of prototyping and manufacturing these applications. Using simulation and apps, we can streamline the development cycle of wireless communication designs.

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Yosuke Mizuyama | May 30, 2016

In a previous blog post, we discussed simulating focused laser beams for holographic data storage. In a more specific example, an electromagnetic wave focused by a Fourier lens is given by Fourier transforming the electromagnetic field amplitude at the lens entrance. Let’s see how to perform this integral type of preprocessing and postprocessing in COMSOL Multiphysics with a Fraunhofer diffraction example.

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Andrew Strikwerda | May 26, 2016

It is always important to choose the correct tool for the job, and choosing the correct interface for high-frequency electromagnetic simulations is no different. In this blog post, we take a simple example of a plane wave incident upon a dielectric slab in air and solve it in two different ways to highlight the practical differences and relative advantages of the Electromagnetic Waves, Frequency Domain interface and the Electromagnetic Waves, Beam Envelopes interface.

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Caty Fairclough | May 24, 2016

The magnetostrictive effect causes magnetic materials to change their shape when a magnetic field is applied. Materials that exhibit such behavior are used in a range of devices, from loudspeakers to actuators. In order to analyze one type of device, a magnetostrictive transducer, researchers from ETREMA Products, Inc. performed single-physics and multiphysics simulation studies in COMSOL Multiphysics. See how the flexible nature of the software enabled the team to study various aspects of the device and optimize its overall design.

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Nandita Roche | May 19, 2016

Maximizing the efficiency of the learning process, while keeping students engaged — this is the common goal that professors hope to achieve in any course. In the realm of physics- and engineering-based courses, simulation apps are helping to strike such a balance by introducing students to complex concepts in a simplified format. Here, we’ll take a look at some of the innovative ways that university professors are utilizing apps within the classroom.

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Brianne Costa | May 18, 2016

Think about the “ideal” wireless network. Data would download at ultrafast rates. We could be connected anywhere in the world and expect quality performance every time we use our devices. An ideal wireless network would be, above all, reliable — no dropped calls, undelivered messages, or waiting for a web page to open. To meet the specific performance requirements of this ideal network, 5G, there are certain RF designs that engineers can consider to transform such technology into a reality.

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Aditi Karandikar | May 11, 2016

Lasers, focused beams of photons of a single wavelength, find use in a wide variety of applications today — from noninvasive surgeries and fiber optic communication to material processing and even DVD players. Let’s see how a research team from Lawrence Livermore National Laboratory (LLNL) used the power of multiphysics simulation to investigate laser-material interaction to avoid the damage of optics internal to high-power laser systems.

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Bridget Cunningham | May 2, 2016

Graphene is a material with a strong presence — and impact — throughout the scientific community. Amongst its many uses, researchers are looking to graphene as a potential material solution within sensor designs for medical and biosensing applications. Today, we’ll explore the role of simulation in analyzing and optimizing a 3D multilayered graphene biosensor.

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Nirmal Paudel | April 26, 2016

Magnetic gears are the contactless mechanisms for torque-speed conversion using permanent magnets or electromagnets. They are utilized in several renewable energy applications, increasing the speed of wind energy, ocean energy, and flywheel energy storage in order to match the specification of the electromagnetic generator. Unlike their mechanical counterparts, magnetic gears offer inherent overload protection, have high reliability due to frictionless operation, and require no lubrication. Today, we’ll discuss how to simulate magnetic gears in 2D and 3D with COMSOL Multiphysics.

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