drawing the insulation for integrated transformer with stray path

[Abujazar]

The test file should be adapted for two files, in test_transformer_integrated_core_fixed_loss_angle and test_transformer_stacked_center_tapped. This is because the insulation will appear as
'dictionary_item_removed': [root['simulation_settings']['insulation']['top_section_core_insulations'], root['simulation_settings']['insulation']['bottom_section_core_insulations']], instead of ['insulation']['core_insulations']],

In addition, these is a difference in the digit in test_inductor_core_material_database, which I can solve it yet. The fixture is shown on the left.

[gituser789]

Found bug with overlapping insulation and conductors.

import femmt as fmt
import os


def basic_example_transformer_stacked(onelab_folder: str = None, show_visual_outputs: bool = True,
                                      is_test: bool = False):
    """
    Run the example code for the stacked transformer.

    :param onelab_folder: onelab folder path
    :type onelab_folder: str
    :param show_visual_outputs: True to show visual outputs (simulation results)
    :type show_visual_outputs: bool
    :param is_test: True for pytest usage. Defaults to False.
    :type is_test: bool
    """
 
    example_results_folder = os.path.join(os.path.dirname(__file__), "example_results")
    if not os.path.exists(example_results_folder):
        os.mkdir(example_results_folder)

    working_directory = os.path.join(example_results_folder, os.path.splitext(os.path.basename(__file__))[0])
    if not os.path.exists(working_directory):
        os.mkdir(working_directory)

    # 1. chose simulation type
    geo = fmt.MagneticComponent(component_type=fmt.ComponentType.IntegratedTransformer,
                                working_directory=working_directory, verbosity=fmt.Verbosity.ToConsole, is_gui=is_test)

    # This line is for automated pytest running on GitHub only. Please ignore this line!
    if onelab_folder is not None:
        geo.file_data.onelab_folder_path = onelab_folder

    # 2. set core parameters
    core_dimensions = fmt.dtos.StackedCoreDimensions(core_inner_diameter=0.02, window_w=0.02, window_h_top=0.01,
                                                     window_h_bot=0.03)
    core = fmt.Core(core_type=fmt.CoreType.Stacked, core_dimensions=core_dimensions, mu_r_abs=3100, phi_mu_deg=12,
                    sigma=0.6,
                    permeability_datasource=fmt.MaterialDataSource.Custom,
                    permittivity_datasource=fmt.MaterialDataSource.Custom)
    geo.set_core(core)

    # 3. set air gap parameters
    air_gaps = fmt.AirGaps(fmt.AirGapMethod.Stacked, core)
    air_gaps.add_air_gap(fmt.AirGapLegPosition.CenterLeg, 0.002, stacked_position=fmt.StackedPosition.Top)
    air_gaps.add_air_gap(fmt.AirGapLegPosition.CenterLeg, 0.001, stacked_position=fmt.StackedPosition.Bot)
    geo.set_air_gaps(air_gaps)

    # 4. set insulations
    insulation = fmt.Insulation(flag_insulation=True)
    # insulation.add_core_insulations(0.001, 0.001, 0.001, 0.001)  # [bot, top, left, right]
    insulation.add_top_section_core_insulations(0.002, 0.002, 0.001, 0.001)
    insulation.add_bottom_section_core_insulations(0.002, 0.002, 0.001, 0.001)
    insulation.add_winding_insulations([[0.0001, 0.001],
                                        [0.001, 0.0002]])
    geo.set_insulation(insulation)

    winding_window_top, winding_window_bot = fmt.create_stacked_winding_windows(core, insulation)

    vww_top = winding_window_top.split_window(fmt.WindingWindowSplit.NoSplit)
    vww_bot = winding_window_bot.split_window(fmt.WindingWindowSplit.NoSplit)

    # 6. set conductor parameters
    winding1 = fmt.Conductor(0, fmt.Conductivity.Copper)
    winding1.set_litz_round_conductor(None, 100, 70e-6, 0.5, fmt.ConductorArrangement.Square)

    winding2 = fmt.Conductor(1, fmt.Conductivity.Copper)
    winding2.set_solid_round_conductor(1e-3, fmt.ConductorArrangement.Square)
    # winding2.set_litz_round_conductor(None, 120, 70e-6, 0.5, fmt.ConductorArrangement.Square)

    # 7. add conductor to vww and add winding window to MagneticComponent
    vww_top.set_interleaved_winding(winding1, 16, winding2, 0, fmt.InterleavedWindingScheme.HorizontalAlternating)
    vww_bot.set_interleaved_winding(winding1, 40, winding2, 20, fmt.InterleavedWindingScheme.HorizontalAlternating)

    geo.set_winding_windows([winding_window_top, winding_window_bot])

    # 8. start simulation with given frequency, currents and phases
    geo.create_model(freq=250000, pre_visualize_geometry=show_visual_outputs)
    geo.single_simulation(freq=250000, current=[2.0, 4.0], phi_deg=[0, 180],
                          show_fem_simulation_results=show_visual_outputs)


if __name__ == "__main__":
    basic_example_transformer_stacked(show_visual_outputs=True)

[gituser789]

Also happens with the outer insulation

    insulation.add_top_section_core_insulations(0.0005, 0.0005, 0.001, 0.002)
    insulation.add_bottom_section_core_insulations(0.0005, 0.0005, 0.001, 0.003)

[gituser789]

And with the inner insulation too

    insulation.add_top_section_core_insulations(0.0005, 0.0005, 0.0001, 0.003)
    insulation.add_bottom_section_core_insulations(0.0005, 0.0005, 0.001, 0.003)

[Abujazar]

Not all the cases of split window when we have stray path are clear. We may discuss this later