Variable Reluctance
Variable Magnetic Resistance.
Description
The Variable Reluctance block represents the variable magnetic resistance, that is, the component that is resisting magnetic flux. The ratio of the magnetomotive force (MDF) on the component to the resultant flux flowing through the component is defined as the resistance and depends on the value of the input signal.
The block is based on the following equations:
,
,
Where:
-
- is the magnetomotive force (MDF) on the component.
-
- flux through the magnetic ports.
-
- magnetic resistance.
-
- value at the input port.
-
- magnetic constant.
-
- relative magnetic permeability of the material.
-
- cross-sectional area of the modelled element.
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.
Input
N is the north terminal
magnetic
Magnetic port corresponding to the north terminal of the unit.
S is the south terminal
magnetic
Magnetic port corresponding to the south terminal of the unit.
Port_1 - input signal
scalar
Input port that specifies the value of the air gap length or section thickness.
Parameters
Minimum length of thickness X>=0, m - minimum air gap X>=0
0 (By default)
Minimum value of air gap length or section thickness. If the input signal falls below this level (e.g. becomes negative), the minimum value is used. The parameter value must be non-negative.
Cross-sectional area, m^2 - cross-sectional area
0.01 m² (by default).
Cross-sectional area of the modelled element.
Relative permeability of material - relative 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.