Parameter file

Name Design Description
Parameter file STRING Name of the file with motor parameters

 

The properties of the motor are defined in the parameter file.
Severals motors, both asynchronous and synchronous, can be defined in one file.
The file is edited manually in any text editor and must be saved in the simulation path.
The file name is entered at the block SimMotor as '>Parameterdatei<.txt' .

 

The precision of the simulation results depends heavily on the quality of these motor parameters.

Parameter file 'Motoren.txt'

 

The required parameters differ for asynchronous and synchronous motors.

 

Parameters for asynchronous motors

The definition of an asynchronous motor begins with the keyword AsyncMotor.

Motor parameters
Name Design Unit Description
Rs DOUBLE Ω Stator resistance Rs
Rr DOUBLE Ω Rotor resistance Rr

Lss

 DOUBLE

H

Stator leakage inductance Lss

Lrs

 DOUBLE

H

Rotor leakage inductance Lrs

Lm

 DOUBLE

H

Main inductance Lm
Zp DOUBLE   Pole pair number
T DOUBLE kgm2 Rotor moment of inertia
INOISE DOUBLE A Noise amplitude during current measurement
TNOISE DOUBLE rad Noise amplitude during position measurement

 

Parameters for synchronous motors

The definition of a synchronous motor begins with the keyword Motor.

Motor parameters
Name Design Unit Description
R DOUBLE Ω Resistance of the motor phase Rs
Ld DOUBLE H d-axis inductance of one motor phase Ld
Lq DOUBLE H q-axis inductance of one motor phase Lq
Psi DOUBLE Vs

Rotor flux

  • The rotor flux Ψ can be calculated from ID34234'Voltage constant Ke':
  • Alternatively, the rotor flux Ψ can be calculated from ID32771 'Nominal torque' and ID111'Motor nominal current IN':
Zp DOUBLE   Pole pair number
T DOUBLE kgm2 Rotor moment of inertia
IL2 DOUBLE A

Current at which inductance is halved

(This parameter is used to describe saturation effects. If saturation is not to be taken into account, a value significantly higher than the nominal current must be entered.)
A / A2 DOUBLE Vs Harmonic distortion 1 / 2: amplitude of the cosine proportion
B / B2 DOUBLE Vs Harmonic distortion 1 / 2: amplitude of the sine proportion
Harm / Harm2 DOUBLE   Harmonic distortion 1 / 2: periods per rotor revolution (for simulation of cyclic distortions, z. B. cogging, gearing imbalance)
INOISE DOUBLE A Noise amplitude during current measurement
TNOISE DOUBLE rad Noise amplitude during position measurement

 

If one of the parameters is not defined, it is assigned a default value.