Showing result: 1 - 10 of 21
AC/DC Systems
-
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...
Read more about this model -
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...
Read more about this model -
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...
Read more about this model -
Forced Convection Cooling of Horizontal Circuit Board
In this suite of models, temperature distribution and fluid flow field is modeled with the General Heat Transfer and the Non-Isothermal Flow application modes. By modeling the fluid flow and heat transfer simultaneously the convective transfer is described very accurately. The results are analysed a...
Read more about this model -
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...
Read more about this model -
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...
Read more about this model -
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...
Read more about this model -
Distributed SPICE Model of Bipolar Transistor
Integrated semiconductor devices are used in almost all electrical equipment, and the bipolar junction transistor (BJT) is still a very important device although the MOS technology has taken over a large part of the market. Especially in technologies with new types of semiconductors the bipolar tran...
Read more about this model -
Linear Electric Motor of Moving Coil Type
Linear electric motors (LEMs) are electromechanical devices which produce motion in a straight line directly, without the use of a mechanism to convert rotary motion to linear motion. The benefit over conventional rotary-to-linear counterparts is the absence of mechanical gears and transmission syst...
Read more about this model -
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...
Read more about this model