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:
Parameter (JSON key) | Value type | Unit | Description | Example |
|---|---|---|---|---|
NoLoadStatorCurrent | 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 its values must be arranged in ascending order. | "NoLoadStatorCurrent": [ |
| NoLoadLineToLineVoltage | 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 its values must be arranged in ascending order. | "NoLoadLineToLineVoltage": [ |
NoLoadFrequency | double | Hertz | Frequency used during the no-load test. This value cannot be zero. | "NoLoadFrequency": 60, |
NomicalStatorLeakageInductance | double | Henry | Nominal value of the stator leakage inductance calculated using the locked-root 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": 0.09 |
For 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).
{
"NoLoadStatorCurrent": [
5.0,
10.0,
17.0
],
"NoLoadLineToLineVoltage": [
120.0,
230.0,
300.0
],
"NoLoadFrequency": 60,
"NominalStatorLeakageInductance": 0.0008,
"NominalStatorResistance": 0.09
}
An example Magnetizing Inductance File in JSON format is available here: Magnetizing Inductance JSON Template.json