Showing result: 1 - 10 of 36
AC/DC Module
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Simulating a Generator in 3D
The generator analyzed in this model consists of a rotor with permanent magnets and a nonlinear magnetic material inside a stator of the same magnetic material.
The model calculates the static magnetic fields inside and around the generator.
The nonlinearity of the magnetic material is modele...
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Planar Transformer on a PCB
A planar transformer is a transformer that is integrated onto a printed circuit board (PCB). They can either be manufactured as standalone devices, or integrated into the PCB of a module. The planar structure improves the cooling characteristics and gives the device a low profile. Therefore, the mai...
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Simulating a Generator in 2D
In this model, a rotor with permanent magnets and a nonlinear magnetic material rotates within a stator of the same magnetic material.
The generated voltage in windings around the stator is calculated as a function of time. COMSOL Multiphysics models the rotation with assemblies and identity pai...
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Model of an RFID System
An RFID system consists of two main parts:
A tag or transponder with a printed circuit-board (PCB) antenna
A reader unit with a larger RF antennaThe reader antenna generates an electromagnetic field that energizes a chip (IC-circuit) inside the tag. The electromagnetic field is modulated by the ta...
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Simulating a Generator in 2D using Periodic Boundary Conditions
This model of a generator includes an ordinary differential equation (ODE) for the mechanical dynamics and computation of the torque resulting from the magnetic forces.
In addition, it exploits symmetry to reduce the model size to 1/8 of the original size. Periodic boundary conditions are then ut...
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Bond Wires to a Chip
Bonding wires connect an integrated circuit to the pins of the package that holds it. These wires introduce relatively large inductances that can introduce crosstalk and distort the signals.
This model calculates the lumped parameters in the form of self inductance and the mutual inductance betwe...
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Joule Heating in High-current Battery Clamps in a Circuit
This model analyzes a car battery-charger circuit where the cables and clamps are modeled using the finite element method. They experience high current that results in Joule heating that in turn affects the conductivity of their materials.
Use of the new SPICE Import interface in COMSOL Multiphy...
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RF-Heated Hot Wall Furnace for Semiconductor Processing
Furnace reactors are used in the fabrication of semiconductor industry to grow layers on the wafers. These can also be used for epitaxial growth, which is a key technology for fabrication of electrical devices. For the wide band gap silicon carbide substance growth takes place in graphite susceptor...
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The Electromagnetic Fields from a Railgun
A Railgun is a type of magnetic accelerator gun that utilizes an electromagnetic force to propel an electrically-conductive projectile. Current flowing through the rails sets up magnetic fields perpendicular to each other, forcing the projectile to accelerate along the rails.
As no ferromagnetic...
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Including an Explicit Model of an Inductor in the Simulation of an Amplifier Circuit
When an engineer is designing a new electronic component, like a capacitor or an inductor, the SPICE parameters for that device are not known. They are either extracted from finite element tools, such as COMSOL Multiphysics, or from measurements on a prototype. To speed up the design process it can...
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