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Cylindrical magnetic device (actuator)

DC magnetic actuator, actuator magnetic force, electromagnetic actuator simulation

The cylindrical magnetic device consists of a fixed magnetic part, cylindrical magnetic plunger and a coil.

Problem Type
Axisymmetric problem of DC magnetics.

Geometry
Cylindrical magnetic device The cylindrical magnetic device consists of a fixed magnetic part, cylindrical magnetic plunger and a coil. g Core Plunger Winding

Given
Number of turns in the winding N = 1000;
Current i = 5 A;
Plunger position g = 5 mm.
The core and plunger material is steel with a nonlinear dependence B(H):

Task
Determine the magnetic force and the inductance.

Results
cylindrical magnetic device flux density

cylindrical magnetic device force

cylindrical magnetic device inductance

The inductance of the multiturn winding:
L = N² · Ψ / I,
where I - is an overall current: I = N·i = 1000·5 = 5000 A.

L = 1000² · 0.00025468 / 5000 = 0.509 Hn

  QuickField (Reference)*
B, T 1.094 1.097
L, Hn 0.509 0.524
F, N 865 881.5

* Reference: Nicola Bianchi, Electrical Machine Analysis Using Finite Elements, ISBN 0849333997, page 89.

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