Reluctance Force Actuator
The interface between magnetic and mechanical translational networks.
blockType: AcausalFoundation.Magnetic.Elements.ReluctanceForceActuator
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Description
Block Reluctance Force Actuator It is an interface between magnetic and mechanical translational networks.
The block is based on the following equations:
,
,
where:
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— magnetic force;
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— flow through magnetic ports;
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— magnetic resistance;
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— thickness or length of the air gap;
-
— magnetic constant;
-
— relative magnetic permeability of the material;
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— the cross-sectional area of the modeled element;
-
— speed.
Connections N and S are magnetic ports, and connections C and R are mechanical translational ports. The magnetic force generated by the actuator tends to reduce the gap, so the resulting force is negative when it acts from C to R.
Key assumptions and limitations
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The excitation current in the system is constant.
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Only the axial magnetic flux is modeled.
Entrance
N — north terminal
magnetic
The magnetic port corresponding to the northern terminal of the unit.
S — south terminal
magnetic
The magnetic port corresponding to the southern terminal of the unit.
C — housing
A mechanical translational port corresponding to the body.
R — stock
Mechanical translational port corresponding to the rod.
Parameters
Initial air gap, m — initial air gap
0.002 m (default)
The length of the air gap at the beginning of the simulation.
Minimum air gap, m — minimum air gap
0.0000001 m (default)
The minimum value of the air gap at which the gap is considered closed. The parameter value must be greater than 0.
Cross-sectional area, m2 — cross-sectional area of the
0.01 m2 (default)
The cross-sectional area of the modeled element.
Relative permeability of material — relative magnetic permeability of the material
1 (default)
Relative permeability of the material.
Contact stiffness, N/m — contact stiffness
1000000 N/m (default)
Stiffness, which simulates a rigid stop in the position of the minimum air gap.
Contact damping, N*s/m — contact damping
500 N*s/m (default)
Damping, which simulates a rigid stop at the minimum air gap position.
Initial value of flux, Wb is the initial value of the magnetic flux
0 (default)
The initial value of the magnetic flux.
Initial value of MMF, A is the initial value of the magnetomotive force
0 (default)
The initial value of the magnetomotive force.
Initial value of force, N is the initial value of the pass force:q[<br>] 0 (default)
The initial value of the force.
Initial value of relative velocity, m/s is the initial value of the relative velocity of the
0 (default)
The initial value of the relative velocity.