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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)

Symbol

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. All and can contain up to 33 values. All its values must be greater than zero and strictly increasing. Linear interpolation will be performed by the model to compute values between defined data points.

Code Block
languagejson
"NoLoadStatorCurrent": [
  5.0,    
  10.0,    
  17.0
],

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 strictly increasing. Linear interpolation will be performed by the model to compute values between defined data points.

Code Block
languagejson
"NoLoadLineToLineVoltage":  [
  120.0,
  230.0,
  300.0
],

NoLoadFrequency

f

double

Hertz

Frequency used during the no-load test. This value cannot be zero.

Code Block
languagejson
"NoLoadFrequency": 60,

NominalStatorLeakageInductance

Lls

double

Henry

Nominal value of the stator leakage inductance calculated using the locked-rotor test.

If this value is zero, the resulting magnetizing inductance is calculated ignoring the voltage drop in the stator leakage inductance.

Code Block
languagejson
"NominalStatorLeakageInductance": 0.0008

...