Permanent magnet force - QuickField simulation example
This is a simulation example from Compumag TEAM Workshop Problem 23*.
How to calculate the axial force between a permanent magnet and a coil and verify against the TEAM benchmark?
Answer Typical applications Geometry
Given Task
Solution
Result
Reference
Engineering question
Represent the multi-turn coil by homogeneous ampere-turns, sweep current with LabelMover, and compare the resulting axial force with the reference.
ring permanent magnets, magnetic holding fixtures, magnetic clamps
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Simulation problem
Problem Type
Axisymmetric problem of DC magnetics
Permanent magnet Sm-Co coercive force Hc = 720 kA/m, remanence Br = 1.06 T;
Coil number of turns 280, current I = 10.. 100 mA
Distance between the coil and the permanent magnet δ=0.254 mm.
Calculate the axial force between the permanent magnet and the coil and compare the results with the reference values.
The coil has a lot of turns and is wound with an insulated wire, so the current distribution across the coil cross-section is considered to be homogeneous. The coil is modelled as a solid block with the total ampere-turns specified.
LabelMover parametric tool is used to generate a series of problems and calculate the force.
The force value at I = 50 mA is 0.01096 N, which is equal to the gravity force acting on a weight of 1.117 g (1.5% less than the reference value of 1.132 g).
*Compumag TEAM Workshop
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