OOFELIE::Multiphysics - Engineering Standard Multiphysics Solutions / Applications / Transducers / Electromechanical devices

Electrotechnical devices

Piezoresistive Pressure Sensor.

Piezoresistive Semiconductor material printed on a flexible membrane structure. The stretching of this structure translates itself in a change in resistivity of the material. Measurement circuits can be co-simulated with build-in electronic components.

Electromagnetic actuation (Magnetodynamics)

This last application is the simulation of the electromagnetic actuation of a very small conductor pipe with ellipsoidal cross-section. This kind of actuation allows for example to control a fluid flow passing through the pipe by sequencing the different coils placed along the wall.

Induction heating (Magnetodynamics)

When a conductor is placed in a variable magnetic induction, eddy currents appear at its surface (and in a depth depending on the frequency of the excitation current, on the electric conductivity and on the magnetic permeability of the material). These currents cause power dissipation by joule effect and an increase in the conductor’s temperature. The aim of this example is to heat one tooth of a milling cutter for maintenance purposes. An inductor submitted to a sinusoidal electromotive source is placed close to the tooth we want to heat. It generates eddy currents in the milling cutter and consequently a local heating.

DC Electromagnet (Magnetostatics)

This example illustrates the simulation of a DC electromagnet. The aim of this device is to obtain a magnetic field that is as strong as possible in the air-gap. It is composed of two winded coils carrying a constant current and a magnetic core with high permeability. The aim of the magnetic circuit is to channel the field generated by the two inductors.

Windscreen deicing (Electrokinetic)

This example illustrates a simulation of the electric deicing of a rear car windscreen. The simulation performed here consists in computing the evolution of the windscreen’s temperature during the heating process in given conditions (outer and inner temperature, convection coefficient…). The solver handles variation of the materials’ resistivity (and consequently of the dissipated power) according to temperature, which allows a more accurate simulation of the deicing process.

Spot welding (Joule effect)

In spot welding process, we have two conductor parts (if possible with low resistivity) to be welded.