Modelica.Magnetic.FundamentalWave.Examples.BasicMachines.InductionMachines.ComparisonPolyphase

Compare polyphase machines with three-phase machines

Information

Extends from Modelica.Icons.ExamplesPackage (Icon for packages containing runnable examples).

Package Content

Name	Description
IMC_DOL_Polyphase	Direct on line start of polyphase induction machine with squirrel cage
IMS_Start_Polyphase	Starting of polyphase induction machine with slip rings

Modelica.Magnetic.FundamentalWave.Examples.BasicMachines.InductionMachines.ComparisonPolyphase.IMC_DOL_Polyphase

Direct on line start of polyphase induction machine with squirrel cage

Information

At start time tStart voltages are supplied to the polyphase induction machines with squirrel cage. The machines starts from standstill, accelerating inertias against load torque quadratic dependent on speed, finally reaching nominal speed. Two equivalent machines with different numbers of phases are compared and their equal behavior is demonstrated.

Simulate for 1.5 seconds and plot (versus time):

aimcM|M3.tauElectrical: machine torque
aimsM/M3.wMechanical: machine speed
feedback.y: zero since difference of three-phase current phasor and scaled polyphase current phasor are equal

Extends from Modelica.Icons.Example (Icon for runnable examples).

Parameters

Name	Description
m	Number of stator phases
VsNominal	Nominal RMS voltage per phase [V]
fNominal	Nominal frequency [Hz]
tOn	Start time of machine [s]
T_Load	Nominal load torque [N.m]
w_Load	Nominal load speed [rad/s]
J_Load	Load inertia [kg.m2]
p	Number of pole pairs
aimcData	Induction machine data

Modelica.Magnetic.FundamentalWave.Examples.BasicMachines.InductionMachines.ComparisonPolyphase.IMS_Start_Polyphase

Starting of polyphase induction machine with slip rings

Information

At start time tOn voltages are supplied to the induction machines with sliprings. The two machine start from standstill, accelerating inertias against load torque quadratic dependent on speed, using a starting resistance. At time tRheostat external rotor resistance is shortened, finally reaching nominal speed. Two equivalent machines with different numbers of phases are compared and their equal behavior is demonstrated.

Simulate for 1.5 seconds and plot (versus time):

aimcM|M3.tauElectrical: machine torque
aimsM|M3.wMechanical: machine speed
feedback.y: zero since difference of three-phase current phasor and scaled polyphase current phasor are equal

Extends from Modelica.Icons.Example (Icon for runnable examples).

Parameters

Name	Description
m	Number of stator phases
mr	Number of rotor phases
VsNominal	Nominal RMS voltage per phase [V]
fNominal	Nominal frequency [Hz]
tOn	Start time of machine [s]
RStart	Starting resistance [Ohm]
tRheostat	Time of shortening the rheostat [s]
T_Load	Nominal load torque [N.m]
w_Load	Nominal load speed [rad/s]
J_Load	Load inertia [kg.m2]
aimsData	Induction machine data

Automatically generated Thu Oct 1 16:07:50 2020.