Magneto Static: presentation and typical example

Presentation

The Magneto Static application allows the user to study the phenomena created by a magnetostatic field. The magnetic field is related to the presence of DC currents (stationary currents) and/or of permanent magnets.

Use

The Magneto Static application can be used to model different devices.

Thus, we can compute:

• the magnetic field in the structures with magnets for particle accelerators, spectrometers or MRI magnets, attenuation of the magnetic field due to the magnetic shieldings, the field of magnetic reading heads
• the forces in magnetic bearings, in the electromagnets and in the contactors
• the torques in rotating machines and micromotors
• the self-inductance and mutual inductances of different devices (transformers, coil-ends of rotating machines…)

Typical example

A typical example of a problem treated as a Magneto Static application is presented in the figure below.

: air or vacuum

: magnetic medium (non-conducting)

: conducting medium (non magnetic)

Principal results

The principal results that can be obtained with the Magneto Static application are:

• the repartition of the magnetic field strength H, of the magnetic flux density B, and of the density of magnetic energy dWm
• the magnetic energy Wm in a region or in all of the study domain, the force Fm and the magnetic torque Γm on a region
• the magnetic flux crossing a surface or a winding

By means of these quantities, it is possible to compute inductances…