.Modelica.Electrical.Machines.BasicMachines.SynchronousInductionMachines.SM_ElectricalExcited

Information

Model of a three phase electrical excited synchronous induction machine with damper cage.
Resistance and stray inductance of stator is modeled directly in stator phases, then using space phasor transformation and a rotor-fixed AirGap model. Resistance and stray inductance of rotor's squirrel cage is modeled in two axis of the rotor-fixed coordinate system. Electrical excitation is modelled by converting excitation current and voltage to d-axis space phasors. The machine models take the following loss effects into account:

Whether a damper cage is present or not, can be selected with Boolean parameter useDamperCage (default = true).
Default values for machine's parameters (a realistic example) are:

number of pole pairs p 2
stator's moment of inertia 0.29 kg.m2
rotor's moment of inertia 0.29 kg.m2
nominal frequency fNominal 50 Hz
nominal voltage per phase 100 V RMS
no-load excitation current
@ nominal voltage and frequency
10 A DC
warm excitation resistance 2.5 Ohm
nominal current per phase 100 A RMS
nominal apparent power -30000 VA
power factor -1.0 ind./cap.
nominal excitation current 19 A
efficiency w/o excitation 97.1 %
nominal torque -196.7 Nm
nominal speed 1500 rpm
nominal rotor angle -57.23 degree
stator resistance 0.03 Ohm per phase at reference temperature
reference temperature TsRef 20 °C
temperature coefficient alpha20s 0 1/K
stator reactance Xd 1.6 Ohm per phase in d-axis
giving Kc 0.625
stator reactance Xq 1.6 Ohm per phase in q-axis
stator stray reactance Xss 0.1 Ohm per phase
damper resistance in d-axis 0.04 Ohm at reference temperature
damper resistance in q-axis same as d-axis
reference temperature TrRef 20 °C
temperature coefficient alpha20r 0 1/K
damper stray reactance in d-axis XDds 0.05 Ohm
damper stray reactance in q-axis XDqs same as d-axis
excitation resistance 2.5 Ohm at reference temperature
reference temperature TeRef 20 °C
temperature coefficient alpha20e 0 1/K
excitation stray inductance 2.5 % of total excitation inductance
stator operational temperature TsOperational 20 °C
damper operational temperature TrOperational 20 °C
excitation operational temperature TeOperational 20 °C
These values give the following inductances:
main field inductance in d-axis (Xd - Xss)/(2*pi*fNominal)
main field inductance in q-axis (Xq - Xss)/(2*pi*fNominal)
stator stray inductance per phase Xss/(2*pi*fNominal)
damper stray inductance in d-axis XDds/(2*pi*fNominal)
damper stray inductance in q-axis XDqs/(2*pi*fNominal)

Generated at 2020-06-05T07:38:22Z by OpenModelica 1.16.0~dev-420-gc007a39