How to specify SCIM with saturation magnetizing inductance parameters in the Schematic Editor ?
The SCIM 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 SCIM 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": [ |
NoLoadLineToLineVoltage | double array | Vrms | Root mean-square value of the line-to-line voltage measured under no-load test conditions. | "NoLoadLineToLineVoltage": [ |
NoLoadFrequency | double | Hertz | Frequency used during no-load test. This value shall not be zero. | "No Load Frequency": 60, |
NominalStatorLeakageInductance | double | Henry | Nominal value of stator leakage inductance, calculated from the locked-root test. | "Nominal Stator LeakageI nductance": 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 Poly-phase 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": [ |
MagnetizingInductance | double array | Henry | Magnetizing inductance | "MagnetizingInductance": [ |
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
]
}