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AC/DC Module

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Simulating a Generator in 2DSimulating 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...

Simulating a Generator in 3DSimulating 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...

Nonlinear Magnetostrictive TransducerNonlinear Magnetostrictive Transducer

Magnetostrictive transduction is used in sonars, acoustic devices, active vibration and position control and fuel injection systems. The transducer has a steel housing enclosing a drive coil. A magnetostrictive material is placed in the...

Inductive Heating of Copper CylinderInductive Heating of Copper Cylinder

The induced currents in a copper cylinder produce heat, and when the temperature rises, the electrical conductivity of the copper changes. The heating caused by the induced currents is called inductive heating. Generally heating due to...

Simulating a Generator in 2D using Periodic Boundary ConditionsSimulating 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...

Bond Wires to a ChipBond 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...

Heating CircuitHeating Circuit

Small-sized heating circuits are used in many applications. For example, in different manufacturing processes, heating circuits are used to heat reactive fluids. This is a stationary model of a heating circuit, consisting of a thin...

The Electromagnetic Fields from a RailgunThe 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...

Joule Heating in High-current Battery Clamps in a CircuitJoule 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...

Model of an RFID SystemModel 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)...


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