Fridge magnets - QuickField simulation example
Fridge magnets (refrigerator magnets) are popular application of the Halbach Array. They are designed to increase the magnetic force on one side.
How to find magnetic field of fridge magnets?
Answer Typical applications Geometry
Given Task
Solution
Results
Magnetic field lines of the Halbach array magnet near the steel fridge door.
* References: Wikipedia :: Refrigerator magnet
Engineering question
Set up a plane-parallel QuickField DC Magnetics problem for a permanent magnet and evaluate magnetic field distribution from computed field results.
refrigerator permanent magnets, Halbach magnet arrays, decorative magnetic strips
Download
Simulation problem
Problem Type
Plane-parallel problem of DC magnetics
Magnet is made from combination of nine triangular prisms (triangle is in the XY plane) arranged into the film 1 mm thick, 20 mm wide.
D = 1 mm,
H = 1 mm,
B = 20 mm,
Magnet material - N35,
Steel fridge door thickness 1 mm, relative magnetic permeability 1000.
Calculate the magnetic field distribution and the magnet attraction force to the fridge door made of steel with the relative magnetic permeability 1000.
Model may be defined and solved as a DC Magnetic Analysis problem.
Magnetic field of the Halbach array fridge magnet in the empty space.
Fridge magnet attraction force at distance dx=0.01 mm is f = 95 N.
Video
Related examples