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## AC/DC Module

Showing result: 1 - 10 of 68
 Electromagnetics Modeling Presentation, General Introduction 4.3aThis presentation gives an overview of the electromagnetics modeling capabilities of the COMSOL Multiphysics environment. The focus is on the products AC/DC Module and RF Module. Statics, Low-Frequency and High-Frequency applications... Single-turn and Multi-turn Coil Domains in 3DThis tutorial illustrates how to use the Single-Turn Coil Domain and Multi-Turn Coil Domain features for modeling 3D coils. Both DC and AC coil modeling strategies are discussed. A series of simple illustrative tutorials are used to show... E-core Transformer Using Multi-Turn Coil DomainsThis is the transient model of a single phase E-core transformer using a Multi-Turn Coil Domain. The model includes the effect of a nonlinear B-H curve in the core and shows how to connect the transformer model to the external circuits... Inductive Heating of a Copper CylinderThe induced currents in a copper cylinder produce heat that in turn change the electrical conductivity. This means that the field propagation has to be solved simultaneously with the heat transfer through the cylinder and surrounding... The Magnetic Field from a Permanent MagnetAs an example of a magnetostatic problem, consider how to model a horseshoe-shaped permanent magnet. One way is to treat the entire magnet as a ferromagnetic material, where the two end sections are defined as being pre-magnetized in... Voltage Induced in a Coil by Moving MagnetA magnet moving axially through the center of a coil will induce a voltage across the coil terminals. One practical application of this is in shaker flashlights, where the flashlight is vigorously shaken back and forth, causing a magnet... Magnet Falling through Copper TubeA cylindrical magnet falling through a copper tube induces eddy currents on the tube walls, which in turn, create a magnetic field that opposes the magnetic field of the magnet and induces a braking force that opposes the motion of the... Inductor in an Amplifier CircuitThis model shows how to combine an electric circuit simulation with a finite element simulation. The finite element model is an inductor with a nonlinear magnetic core and 1000 turns, where the number of turns is modeled using a... Induction Currents from Circular CoilsA time-varying current induces a time-varying magnetic field. The magnetic field induces currents in neighboring conductors. The induced currents are called eddy currents. In this model, the phenomenon is illustrated by a time-harmonic... Mutual Inductance and Induced Currents in a Multi-Turn CoilThe mutual inductance and induced currents between a single turn primary and twenty turn secondary coil in a concentric coplanar arrangement is computed using a frequency domain model. The secondary coil is modeled using a homogenized...