LeakageAroundPoles
Leakage flux tube around cylindrical or prismatic poles
Library
Modelica/Magnetic/FluxTubes/Shapes/Force
Description
Please refer to the description of the enclosing sub-package Force for a description of all elements of this package.
Leakage flux around a prismatic or cylindric air gap between to poles can be described with this model. Due to its constant radius of the leakage field r, the model is rather simple. Whereas in reality the leakage radius is approximately constant for air gap lengths l greater than this radius, it decreases with air gap lengths less than the leakage radius. This decrease for small air gaps is neglected here, since the influence of the leakage flux tube compared to that of the enclosed main air gap (connected in parallel) decreases for decreasing air gap length l.
Note that in [Ka08] the equation for G_m is accidentally swapped with that of a similar element.
Parameters
| Name | Label | Description | Data Type | Valid Values |
|---|---|---|---|---|
mo_Phi | Phi | Phi | Structure | |
mo_Phi/fixed | fixed | Cell of scalars | true | |
mo_Phi/start | start | Cell of scalars | ||
mo_useSupport | useSupport | = true, if support flange enabled, otherwise implicitly grounded | Number | 0 |
mo_mu_r | mu_r | Relative magnetic permeability | Scalar | |
mo_dlBydx | dlBydx | Derivative of flux tube's varying dimension with respect to armature position; set to +1 or -1 | Scalar | |
mo_w | w | Width orthogonal to flux; mean circumference of flux tube in case of cylindrical poles | Scalar | |
mo_r | r | Radius of leakage field | Scalar | |
mo_l | l | Axial length (in direction of flux) | Scalar |
| Name | Label | Description | Data Type | Valid Values |
|---|---|---|---|---|
mo__nmodifiers | Number of Modifiers | Specifies the number of modifiers | Number | |
mo__modifiers | Modifiers | Add new modifier | Structure | |
mo__modifiers/varname | Variable name | Cell of strings | 'V_m' | |
mo__modifiers/attribute | Attribute | Cell of strings | 'start' | |
mo__modifiers/value | Value |
Ports
| Name | Type | Description | IO Type | Number |
|---|---|---|---|---|
port_p | implicit | Positive magnetic port | input | 1 |
port_n | implicit | Negative magnetic port | output | 1 |
flange | implicit | Generated reluctance force at armature position | output | 2 |
Port 4 | implicit | Support/housing of component | input | mo_useSupport |