Material database for power electronic usage

The main purpose of the material database is to provide various materials for FEM simulations or other calculations in which material data from data sheets or own measurements are required.

Possible application scenarios:

FEM Magnetics Toolbox (FEMMT) loads the permeability or the conductivity of the core from the database, depending on the material.
Graphical user interface (GUI) in FEMMT can compare properties of the material stored in material database.

Overview features

Usable features

Human-readable database based on a .json-file
- The database currently contains 19 different ferrite materials as shown in the following table
- The database includes data from manufacturer datasheets, the Princeton MagNet project and self measured data

Input features:
- Write magnetic parameters into the database
  
  Amplitude of permeability
  
  Angle of permeability
  
  Power loss density (hysteresis losses)
  
  Magnetic flux density
  
  Magnetic field strength
- Write electric parameters into the database
  
  Amplitude of permittivity
  
  Angle of permittivity
  
  Power loss density (eddy current losses)
  
  Electric flux density
  
  Electric field strength
- Write datasheet data into the database
Output features:
- Get the magnetic parameters from the database
- Providing permeability and permittivity data for FEMMT
Interpolation of material data (both electric and magnetic parameters)
GUI features (included in FEMMT):
- Compare the datasheet values of different ferrite cores (e.g. BH-curves or power-loss curves)
- Materials for comparison:
  
  N95
  
  N87
  
  N49
  
  PC200
  
  DMR96A

Planned features (Roadmap for 202x)

Input features:
- Universal function to write data into the database
Output features:
- Get the electric parameters from the database
- Extract data from the database as a specific data file (e.g. .csv)
Plotting features:
- Plot the data of a specific ferrite material, e.g. the amplitude of the permeability over the magnetic flux density
Filter features:
- Get all available data for specific filter keys (e.g. temperature, frequency, material etc.)
- Filter for some specific value intervals (e.g. 10mT < B-flux < 30mT)

Installation

pip install materialdatabase

Basic usage and minimal example

Material properties:

material_db = mdb.MaterialDatabase()
materials = material_db.material_list_in_database()
initial_u_r_abs = material_db.get_material_property(material_name="N95", property="initial_permeability")
core_material_resistivity = material_db.get_material_property(material_name="N95", property="resistivity")

Interpolated permeability and permittivity data of a Material:

b_ref, mu_r_real, mu_r_imag = material_db.permeability_data_to_pro_file(temperature=25, frequency=150000, material_name = "N95", datatype = "complex_permeability",
                                      datasource = mdb.MaterialDataSource.ManufacturerDatasheet, parent_directory = "")

epsilon_r, epsilon_phi_deg = material_db.get_permittivity(temperature= 25, frequency=150000, material_name = "N95", datasource = "measurements",
                                      datatype = mdb.MeasurementDataType.ComplexPermittivity, measurement_setup = "LEA_LK",interpolation_type = "linear")

These function return complex permittivity and permeability for a certain operation point defined by temperature and frequency.

GUI (FEMMT)

The materials in database can be compared with help GUI in FEM magnetics toolbox. In database tab of GUI, the loss graphs and B-H curves from the datasheets of up to 5 materials can be compared.

FEMMT can be installed using the python pip package manager.

pip install femmt

upb-lea/materialdatabase