Welcome to FEM Magnetics Toolbox’s documentation!

Table of Contents:

• 1 FEM Magnetics Toolbox (FEMMT)
  • 1.1 Overview features
    • 1.1.1 Stable features
    • 1.1.2 Experimental features (under development)
    • 1.1.3 Planned features (Roadmap for 202x)
    • 1.1.4 Not supported features
  • 1.2 Documentation
  • 1.3 Literature
  • 1.4 Installation
    • 1.4.1 ONELAB installation
    • 1.4.2 Further steps for macOS(ARM)
    • 1.4.3 Install FEMMT
  • 1.5 Minimal example
  • 1.6 GUI (Experimental)
  • 1.7 Troubleshooting
  • 1.8 Bug Reports
  • 1.9 Contributing
  • 1.10 Changelog
  • 1.11 License
  • 1.12 History and project status
  • 1.13 FEMMT development version (for developers only)
    • 1.13.1 Basics
    • 1.13.2 Counting arrow system
  • 1.14 GUI (Experimental)
• 2 User Guide: How to create a FEMMT model
  • 2.1 Working directory
  • 2.2 Creating a core
    • 2.2.1 Material database
  • 2.3 Adding air gaps to the core
  • 2.4 Set insulation distances
  • 2.5 Add windings to the winding window
    • 2.5.1 Virtual Winding Windows
    • 2.5.2 Winding types and winding schemes
      • 2.5.2.1 ConductorArrangement
      • 2.5.2.2 WrapParaType
  • 2.6 Add conductors
    • 2.6.1 Add conductors to virtual winding windows
      • 2.6.1.1 Alignment
      • 2.6.1.2 Placement Strategies
      • 2.6.1.3 Zigzag Condition
  • 2.7 Create model and start simulation
  • 2.8 Mesh Customization
    • 2.8.1 Conductor meshing
    • 2.8.2 Manually Adapting the Mesh
    • 2.8.3 Viewing the Mesh in Gmsh
  • 2.9 [Optional] Create thermal simulation
  • 2.10 How to Read the Result Log
    • 2.10.1 Example Result Log
      • 2.10.1.1 log_electro_magnetic.json File in Frequency Domain
      • 2.10.1.2 log_electro_magnetic.json File in Time Domain
      • 2.10.1.3 results_thermal.json File
  • 2.11 Warnings and Failures
• 3 Winding types
• 4 FEMMT class and function documentation
  • 4.1 The MagneticComponent class
    • MagneticComponent
      • MagneticComponent.__init__()
      • MagneticComponent.create_model()
      • MagneticComponent.excitation_sweep()
      • MagneticComponent.femm_reference()
      • MagneticComponent.femm_thermal_validation()
      • MagneticComponent.mesh()
      • MagneticComponent.set_air_gaps()
      • MagneticComponent.set_core()
      • MagneticComponent.set_insulation()
      • MagneticComponent.set_stray_path()
      • MagneticComponent.set_winding_windows()
      • MagneticComponent.single_simulation()
      • MagneticComponent.thermal_simulation()
  • 4.2 The Core class
    • Core
      • Core.__init__()
  • 4.3 The AirGaps class
    • AirGaps
      • AirGaps.__init__()
      • AirGaps.add_air_gap()
  • 4.4 The Insulation class
    • Insulation
      • Insulation.__init__()
      • Insulation.add_core_insulations()
      • Insulation.add_winding_insulations()
  • 4.5 The Conductor class
    • Conductor
      • Conductor.__init__()
      • Conductor.set_litz_round_conductor()
      • Conductor.set_rectangular_conductor()
      • Conductor.set_solid_round_conductor()
  • 4.6 The WindingWindow class
    • WindingWindow
      • WindingWindow.__init__()
      • WindingWindow.combine_vww()
      • WindingWindow.split_window()
  • 4.7 The VirtualWindingWindow class
    • VirtualWindingWindow
      • VirtualWindingWindow.__init__()
      • VirtualWindingWindow.set_interleaved_winding()
      • VirtualWindingWindow.set_winding()
  • 4.8 The LogParser class
    • FEMMTLogParser
      • FEMMTLogParser.__init__()
      • FEMMTLogParser.plot_frequency_sweep_losses()
      • FEMMTLogParser.plot_frequency_sweep_winding_params()
    • FileData
      • FileData.core_2daxi_total_volume
      • FileData.file_path
      • FileData.sweeps
      • FileData.total_core_eddy_losses
      • FileData.total_core_hyst_losses
      • FileData.total_core_losses
      • FileData.total_cost
      • FileData.total_winding_losses
    • SweepData
      • SweepData.core_eddy_losses
      • SweepData.core_hyst_losses
      • SweepData.frequency
      • SweepData.winding_losses
      • SweepData.windings
    • WindingData
      • WindingData.active_power
      • WindingData.apparent_power
      • WindingData.current
      • WindingData.flux
      • WindingData.flux_over_current
      • WindingData.reactive_power
      • WindingData.turns
      • WindingData.voltage
  • 4.9 Enumerations
    • enumerations
  • 4.10 Helper functions
    • axial_wavelength()
    • bobbin_database()
    • calc_power_loss_from_MagNet_model_PB()
    • calculate_average()
    • calculate_cylinder_volume()
    • calculate_quadrature_integral()
    • calculate_rms()
    • calculate_squared_quadrature_integral()
    • close_excel_file_if_open()
    • compare_and_plot_connection_capacitance_of_transformer()
    • compare_excel_files()
    • compare_fft_list()
    • conductivity_temperature()
    • convert_air_gap_corner_points_to_center_and_distance()
    • core_database()
    • cost_function_core()
    • cost_function_total()
    • cost_function_winding()
    • cost_material_database()
    • create_folders()
    • create_open_circuit_excitation_sweep()
    • create_physical_group()
    • distribute_potential_linearly()
    • draw_capacitive_equivalent_circuit_of_inductor()
    • draw_capacitive_equivalent_circuit_of_transformer()
    • fft()
    • find_common_frequencies()
    • find_result_log_file()
    • generate_voltage_matrix()
    • get_coupling_matrix()
    • get_defined_potentials()
    • get_dict_with_unique_keys()
    • get_dicts_with_keys_and_values()
    • get_flux_linkages_from_log()
    • get_inductance_matrix()
    • get_mean_coupling_factors()
    • get_number_of_turns_of_winding()
    • get_open_circuit_capacitance()
    • get_self_inductances_from_log()
    • get_short_circuit_capacitance()
    • hysteresis_current_excitation()
    • install_pyfemm_if_missing()
    • insulation_materials_database()
    • json_to_excel()
    • list_installed_packages()
    • list_to_complex()
    • litz_calculate_number_layers()
    • litz_calculate_number_strands()
    • litz_database()
    • plot_fourier_coefficients()
    • plot_open_and_short_comparison()
    • pm_core_inner_diameter_calculator()
    • point_is_in_rect()
    • solve_capacitance()
    • sort_out_small_harmonics()
    • store_as_npy_in_directory()
    • time_current_vector_to_fft_excitation()
    • visualize_coupling_factors()
    • visualize_flux_linkages()
    • visualize_inductance_matrix()
    • visualize_inductance_matrix_coefficients()
    • visualize_mean_coupling_factors()
    • visualize_mean_mutual_inductances()
    • visualize_mutual_inductances()
    • visualize_self_inductances()
    • visualize_self_resistances()
    • visualize_simulation_results()
    • wave_vector()
    • wire_material_database()
  • 4.11 Model helper functions
    • define_center_tapped_insulation()
    • write_permeability_pro_file()
  • 4.12 Reluctance model helper functions
    • MagneticCircuit
      • MagneticCircuit.add_column_to_data_matrix()
      • MagneticCircuit.air_gap_reluctance_single()
      • MagneticCircuit.air_gap_reluctance_single_new()
      • MagneticCircuit.air_gap_reluctance_sweep()
      • MagneticCircuit.air_gap_reluctance_sweep_new()
      • MagneticCircuit.calculate_inductance()
      • MagneticCircuit.core_reluctance()
      • MagneticCircuit.get_parameters_position_dict()
      • MagneticCircuit.input_pre_check()
    • create_data_matrix()
    • distributed_type_1()
    • distributed_type_2()
    • plot_limitation()
    • plot_r_basic()
  • 4.13 Topology helper functions
    • check_if_primary_conductor_row_fits_in_vww()
    • create_stacked_winding_windows()
    • place_center_tapped_conductor_row()
    • place_windings_in_vwws()
    • set_center_tapped_windings()
  • 4.14 Constants
• 5 Developer Notes for FEMMT
  • 5.1 Variable naming
    • 5.1.1 Geometry variables
    • 5.1.2 currents, temperature
    • 5.1.3 Material variables
  • 5.2 Winding creation
  • 5.3 General file overview
  • 5.4 Recommended Pycharm settings
    • 5.4.1 Exclude simulation directory from indexing
    • 5.4.2 Line length
    • 5.4.3 Pycharm code highlighting for pro-files
  • 5.5 Lint check
  • 5.6 Build documentation

Indices and tables

• Index