Engee documentation

Reluctance

Magnetic resistance.

blockType: AcausalFoundation.Magnetic.Elements.Reluctance

fundamental reluctance

Path in the library:

/Physical Modeling/Fundamental/Magnetic/Elements/Reluctance

Description

Block Reluctance It is a magnetic resistance, that is, a component that resists magnetic flux. The ratio of the magnetomotive force (MDS) on the component to the resulting flow flowing through the component is constant, and the ratio value is defined as resistance. The resistance depends on the geometry of the element being modeled.

The block is based on the following equations:



where

  • — magnetomotive force (MDS) on the component;

  • — flow through the component;

  • — magnetic resistance;

  • — the thickness of the magnetic material;

  • — magnetic constant;

  • — relative magnetic permeability of the material;

  • — the cross-sectional area of the modeled element.

The N and S connections are magnetic ports. The MDS through resistance is determined by the expression , and the sign of the magnetic flux is positive when flowing through the device from N to S.

Variables

Use the parameter group Initial Targets to set the priority and initial target values for the block parameter variables before modeling. For more information, see Configuring physical blocks using target values.

Ports

Conserving

# N — The northern terminal
Magnetism

Details

The magnetic port corresponding to the northern terminal of the unit.

Program usage name

port_n

# S — southern terminal
Magnetism

Details

The magnetic port corresponding to the southern terminal of the unit.

Program usage name

port_s

Parameters

Parameters

# Thickness or length of section or gap — thickness of the magnetic material
m | um | mm | cm | km | in | ft | yd | mi | nmi

Details

The thickness of the simulated magnetic material.

Units

m | um | mm | cm | km | in | ft | yd | mi | nmi
Default value

0.001 m
Program usage name

gap
Evaluatable

Yes

# Cross-sectional area — cross-sectional area
m^2 | um^2 | mm^2 | cm^2 | km^2 | in^2 | ft^2 | yd^2 | mi^2 | ha | ac

Details

The cross-sectional area of the modeled element.

Units

m^2 | um^2 | mm^2 | cm^2 | km^2 | in^2 | ft^2 | yd^2 | mi^2 | ha | ac
Default value

0.01 m^2
Program usage name

A
Evaluatable

Yes

# Relative magnetic permeability of material — relative magnetic permeability of the material

Details

The relative magnetic permeability of the material. Meaning 1 corresponds to the air.

Default value

1
Program usage name

mu_r
Evaluatable

Yes

Examples