For an Induction Machine with Saturation, a JSON file is required to define the saturation characteristics of the machine. The file must contain the following information:
| Value type | UnitSymbol | Data Type | Units | Description | Example |
|---|
NoLoadStatorCurrent | IRMS | double[] | Arms | One dimensional array of root-mean-square stator current values measured under no-load test conditions. This array must be the same size as NoLoadLineToLineVoltage |
, and and can contain up to 33 values. All its values must |
be arranged in ascending order.be greater than zero and strictly increasing. Linear interpolation will be performed by the model to compute values between defined data points. | | Code Block |
|---|
| "NoLoadStatorCurrent": [ |
|
|
NoLoadLineToLineVoltage | VLL,RMS | double[] | Vrms | One dimensional array of root-mean-square, line-to-line voltage values measured under no-load test conditions. This array must be the same size as NoLoadStatorCurrent |
, and and can contain up to 33 values. All its values must |
be arranged in ascending order.be strictly increasing. Linear interpolation will be performed by the model to compute values between defined data points. | | Code Block |
|---|
| "NoLoadLineToLineVoltage": [ |
|
|
NoLoadFrequency | f | double | Hertz | Frequency used during the no-load test. |
This This value cannot be zero. | | Code Block |
|---|
| "NoLoadFrequency": 60, |
|
NomicalStatorLeakageInductanceNominalStatorLeakageInductance | Lls | double | Henry | Nominal value of the stator leakage inductance calculated using the locked- |
root rotor test. If this value is zero, the resulting magnetizing inductance is calculated ignoring the voltage drop in the stator leakage inductance. |
"NominalStatorLeakageInductance": 0.0008, | NominalStatorResistance | double | Ohm | Nominal value of the stator resistance calculated using the locked-root test. If this value is zero, the resulting magnetizing inductance is calculated ignoring the voltage drop in the stator resistance. | "NominalStatorResistance| Code Block |
|---|
| "NominalStatorLeakageInductance": 0. |
|
09For additional details about the locked-rotor test and the no-load test, please refer to the IEEE Standard Test Procedure for Polyphase Induction Motors and Generators (IEEE-112).
Parameter Constraints
The following constraints apply to the parameters defined in the file. If the current and voltage measurements are not compatible with the nominal parameters, an error will be thrown.
...
--uriencoded--\frac%7BV_%7BLL,RMS%7D%7D%7B\sqrt 3 *I_%7BRMS%7D%7D > 2 \pi fL_%7Bls%7D |
Example
| Code Block |
|---|
|
{
"NoLoadStatorCurrent": [ |
...
...
...
...
...
"NoLoadLineToLineVoltage": [ |
...
...
...
...
...
...
"NominalStatorLeakageInductance": 0.0008 |
...
...
An example Magnetizing Inductance File in JSON format is available here:
| View file |
|---|
| name | Magnetizing Inductance JSON Template.json |
|---|
|
| Note |
|---|
This file is intended for use as a template only; it does not contain valid simulation data. |
