Reluctance
Magnetic Resistance.
Description
The Reluctance block represents the magnetic resistance, that is, the component that resists magnetic flux. The ratio of the magnetomotive force (MDF) on the component to the resultant flux flowing through the component is constant, and the value of the ratio is defined as the resistance. The resistance depends on the geometry of the component being modelled.
The block is based on the following equations:
,
Where:
-
- is the magnetomotive force (MDF) on the component.
-
- flux through the component.
-
- magnetic resistance.
-
- thickness of the modelled section or length of the air gap.
-
- magnetic constant.
-
- relative magnetic permeability of the material.
-
- cross-sectional area of the modelled component.
Connections N and S are magnetic ports. MDS through the resistance is defined by the expression and the sign of magnetic flux is positive when flowing through the device from N to S.
Ports
N - north terminal
`magnetism
Magnetic port corresponding to the north terminal of the unit.
S is the south terminal
magnetism
Magnetic port corresponding to the south terminal of the unit.
Parameters
Thickness or length of section or gap, m - thickness of section, or length of gap
0.001 m (By default)
Thickness of modelled section or length of air gap.
Cross-sectional area, m² - cross-sectional area
0.01 m² (by default).
Cross-sectional area of the modelled element.
Relative permeability of material - relative magnetic permeability of material
1 (By default)
Relative magnetic permeability of material.
Initial value of flux, Wb - initial value of flux
0 (By default)
Initial value of flux.
Initial value of MMF, A - initial value of MMF
0 (By default).
Initial value of MMF.