Summary for: GeoBase < Indexable & Annotable

Class summary

GeoBase Base class for geometries.

Basic usage:

  • Add some Domains with this.add_domain

  • Add the with `this.add_material`

  • Optionally, add some with `this.add_circuit`

  • Call this.mesh_geometry to mesh the elementary geometry and replicate accordingly.

Note that his is an abstract base class and cannot be instantiated. Most of the time, you’ll be working with either RadialGeometry or AxialGeometry, or their subclasses. Those classes handle the practicalities of mesh replication, namely how the elementary mesh is rotated or translated.

The following methods are recommended to be re-implemented in subclasses:

  • Nrep : number of mesh replications

  • symmetry_period : symmetry period of winding etc.

See RadialGeometry, StatorBase, SlottedRotorBase, SynRotorBase

Properties

.PMs - Permanent magnet Domain objects

.GeoBase/boundaries is a property.

.circuits - Circuit objects defined for this

.data - miscellaneous data

.domains - Domain objects making up this

.nodes = struct() %other nodes

.GeoBase/is_meshed is a property.

.materials - Material objects

.mesh - mesh object, WPI

Methods

Class methods are listed below. Inherited methods are not included.

.GeoBase Constructor

Documentation for GeoBase/GeoBase doc GeoBase

.Nrep Number of times to replicate elementary mesh.

Nrep(this)

Usually subclassed, but by default returns this.dimensions.Nrep.

.add_circuit Add Circuit to this.

.add_domain Add Domain to this.

In case a Domain with a duplicate name exist, the domain name is appended to original_name_n, where n = the lowest integer such that no dublicate names exist.

.add_material Add Material to this.

Adding a new

.GeoBase/add_single_domain is a function.

add_single_domain(this, dnew)

.GeoBase/add_single_material is a function.

add_single_material(this, mnew)

.check_feasibility Perform partial feasibility check on the geometry.

bl = check_feasibility(this) checks if any of the Lines or Surfaces in this intersect, using this.check_line_intersect and this.check_surface_intersect.

If nothing intersects, the method returns true, otherwise false.

.check_line_intersect Check if any lines intersect.

check_line_intersect(this)

check_line_intersect(this, ‘plot’, true) to plot some results.

WARNING Only checks Lines, ignoring Arcs.

.check_surface_intersect Check if any surfaces intersect.

bl = check_surface_intersect(this)

bl = check_surface_intersect(this, ‘plot’, true) to plot some results.

.copy_domain Copy domain and apply necessary rotations or

translations to the domain and remanence orientation, if any.

new = copy_domain(this, old_domain, sector_index)

.create_or_get_material Create or get material.

mout = create_and_add_material(this, m) either

  • returns a material mout from this.materials with mout.name = m.name

  • returns m, if none found above, and adds it to this.materials

.create_geometry Initialize geometry.

this = create_geometry(this, varargin)

Initializes the geometry.

Must be subclassed.

.GeoBase/create_geometry_3D is a function.

create_geometry_3D(this)

.GeoBase/dim is a function.

d = dim(this)

.export_dxf Export geometry as rudimentary dxf file.

export_dxf(this, fname)

drawing = export_dxf(this, fname, ‘skip_save’, true) to return drawing object

export_dxf(this, drawing)

export_dxf(this, fname_or_drawing, key, val, …) with

  • ‘Nrep’, n : replicate geometry, see below

  • ‘rep_angle’, x : apply angle x for each replication

  • ‘unit’, ‘m’ or ‘mm’ : unit to use

  • use_python : use Python’s dxfwrite (true) or Matlab’s dxflib with experimental ARC and LINE features (DEFAULT).

.fill Fill mesh

fill(this, name, varargin)

Fills the mesh of domain name , using varargin{:} as arguments.

  • See msh_fill
  • See this.get_domain for the use of wildcards with name

fill(this, varargin)

Plots the entire mesh using varargin{:} as arguments.

.get_domain Get domain(s) by name.

get_domain(this, name)

Returns the Domain with the correct name .

The wildcard syntax name_* can be used to find all replicated domains corresponding to the original domain with name .

.list_dimensions Display dimensions info on command window

.GeoBase/mass is a function.

[m, m_domain, m_mat] = mass(this)

.mesh_elementary_geometry Create mesh for the elementary geometry.

mesh_elementary_geometry(this)

Meshes the elementary geometry, e.g. the raw geometry before possible replication.

mesh_elementary_geometry(this, ‘delete_files’, false) to keep the .geo and .msh files.

Note that the methods this.shift_elementary_nodes , this.copy_domain , and this.parse_nodes have to be implemented.

.GeoBase/mesh_elementary_geometry_3D is a function.

mesh_elementary_geometry_3D(this, varargin)

.mesh_geometry Mesh geometry.

Equivalent to calling this.mesh_elementary_geometry and this.replicate_elementary_mesh

.parse_nodes Parse special nodes.

parse_nodes(this, Surfaces)

Parses special nodes from meshed Surfaces. Usually airgap and periodic boundary nodes.

.plot Plot nodes on the meshed geometry.

plot(this, varargin)

Equivalent to calling msh_plot(this, varargin{:})

.plot_edges Plot edges

plot_edges(this, edge_definitions), where

  • edge_definitions : 2 x number of edges array; indices to nodes in this.root_mesh.

plot_edges(this, edge_name) to fetch definitions from this.edges

plot_edges(this, name_or_def, plot_args) to pass on plot_args to plot .

.plot_geometry Plots the geometry.

[] = plot_geometry(this, varargin)

Plots the geometry using plot with varargin {:}

.remove_unused Remove unused / unset domains and materials.

First removes Domains that do not have any surfaces, and then Materials that either don’t belong to any Domain, or only belong to a Domain that was removed during the first step.

.replicate_elementary_mesh Replicate elementary mesh.

replicate_elementary_mesh(this, sector_shift, Nrep)

Replicates the elementary geometry Nrep times. This is performed by

  • applying the sector_shift to this.p, using this.shift_elementary_nodes

  • eliminating the duplicate nodes on the inter-sector boundaries, with the nodes corresponding to this.n_cw replaced by this.n_ccw.

.GeoBase/replicate_elementary_mesh_3D is a function.

replicate_elementary_mesh_3D(this)

.save_to_excel Save specifications to Excel sheet.

save_to_excel(this, fname, varargin)

.scale_mesh_density Uniformly scale mesh density.

scale_mesh_density(this, scale) multiplies the characteristic length of most Points in this. The airgap-facing points are ignored by default, see below.

scale_mesh_density(this, scale, ‘curves_to_skip’, curve_names) ignores all the Points that lie on the Curves on specified by their names in the curve_names array of strings. By default, curves named ‘n_ag’ are ignored. The characteristic length of the ignored points is not changed.

Other key-value arguments:

  • lcar_max : maximum characteristic length after scaling. Defaults to inf.
  • lcar_min : minimum characteristic length after scaling. Defaults to 0.

.shift_elementary_nodes Replicate nodes to a new sector.

pnew = shift_elementary_nodes(this, p, k)

Replicated the nodes p of the elementary symmetry sector into the sector k.

.symmetry_period Symmetry period of the geometry.

symmetry_period(this)

Usually subclassed, but by default returns this.dimensions.symmetry_period.

.to_plot_frame Function for transforming coordinates.

y = to_plot_frame(this, x, angle, varargin) transforms coordinates from the mesh frame (this.mesh.p) into a so-called plotting frame. This method is called by most EMDtool plotting functions, so overloading it can be useful at times, such as for visualizing sliced models. By default, angle is assumed to correspond to the rotor_angle concept used by e.g. MagneticsProblem. In normal single-shaft designs, just the mechanical rotor angle, that is.

The default implementation does nothing, i.e. y = x.

Additional syntax options include

  • to_plot_frame(this, x, component) : specifying the GeoBase object component that x lies on.
  • to_plot_frame(this, x, angle, varargin) : with arbitrary arguments, for subclass implementations.

.triplot Triangle plot of this.

triplot(this, name, varargin)

Plots the mesh of domain name , using varargin{:} as arguments.

triplot(this, varargin)

Plots the entire mesh using varargin{:} as arguments.

.visualize visualize geometry.

visualize(this)

Visualizes geometry, using msh_fill with ‘linestyle’, ‘none’.

visualize(this, args)

Visualize, passing args to patch.