DFIM magnetizing inductance parameters file

How to specify DFIM with saturation magnetizing inductance parameters in the Schematic Editor ?

The DFIM with saturation block uses a table defined magnetizing inductance.

This file has to be in one of the specific formats which are described below.

What is the format of the DFIM with saturation magnetizing inductance parameters file?

There are two possible formats for the parameter file, depending on the option selected by the user. In both cases, the electrical parameters are described in a JSON format.

No-load saturation curve parameters

If the user selects the option "Stator Voltage Line to Line VS Stator Current" (default option), the following parameters must appear in the file.

Paremeter (JSON key)	Value type	Unit	Description	Example
NoLoadStatorCurrent	double array	Arms	Root mean-square value of the stator current measured under no-load test conditions.	"NoLoadStatorCurrent": [ 5.0, 10.0, 17.0 ],
NoLoadLineToLineVoltage	double array	Vrms	Root mean-square value of the line-to-line voltage measured under no-load test conditions.	"NoLoadLineToLineVoltage": [ 120.0, 230.0, 300.0 ],
NoLoadFrequency	double	Hertz	Frequency used during no-load test. This value shall not be zero.	"NoLoadFrequency": 60,
NominalStatorLeakageInductance	double	Henry	Nominal value of stator leakage inductance, calculated from the locked-root test.	"NominalStatorLeakageInductance": 0.0008,
NominalStatorResistance	double	Ohm	Nominal value of stator resistance, calculated from the locked-root test.	"NominalStatorResistance": 0.09

For further information about locked-rotor test and no-load test, please refer to IEEE Standard Test Procedure for Polyphase Induction Motors and Generators (IEEE-112).

All the examples above concatenated would give in a valid JSON format:

{
  "NoLoadStatorCurrent": [
    5.0,
    10.0,
    17.0
  ],
  "NoLoadLineToLineVoltage": [
    120.0,
    230.0,
    300.0
  ],
  "NoLoadFrequency": 60,
  "NominalStatorLeakageInductance": 0.0008,
  "NominalStatorResistance": 0.09
}

Flux-dependent magnetizing inductance

Alternatively, if the user selects the option "Magnetizing Inductance VS Magnetizing Flux", the following parameters must appear in the file.

Paremeter (JSON key)	Value type	Unit	Description	Example
MagnetizingFlux	double array	Weber	Magnetizing flux	"MagnetizingFlux": [ 0.2538689, 0.4866922, 0.5275961, 0.6298437, 0.6748371 ],
MagnetizingInductance	double array	Henry	Magnetizing inductance	"MagnetizingInductance": [ 0.0343205, 0.0346647, 0.0309804, 0.0256869, 0.0242660 ]

All the examples above concatenated would give in a valid JSON format:

{
  "MagnetizingFlux": [
    0.2538689,
    0.4866922,
    0.5275961,
    0.6298437,
    0.6748371
  ],
  "MagnetizingInductance": [
    0.0343205,
    0.0346647,
    0.0309804,
    0.0256869,
    0.0242660
  ]
}