IMC_DOL_Polyphase
IMS_Start_Polyphase
IMC_DOL_CommonLeakage
Compare polyphase machines with three-phase machines
Extends from Modelica.Icons.ExamplesPackage (Icon for packages containing runnable examples).
| 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 |
| IMC_DOL_CommonLeakage
|
Direct on line start of polyphase induction machine with squirrel cage |
Modelica.Magnetic.FundamentalWave.Examples.BasicMachines.InductionMachines.ComparisonPolyphase.IMC_DOL_PolyphaseDirect on line start of polyphase induction machine with squirrel cage
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 torqueaimsM/M3.wMechanical: machine speedfeedback.y: zero since difference of three-phase current phasor and scaled polyphase current phasor are equalExtends from Modelica.Icons.Example (Icon for runnable examples).
| 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 |
| aimcData3 | Induction machine data of a three-phase machine |
| aimcDataM | Induction machine data of an m-phase machine |
Modelica.Magnetic.FundamentalWave.Examples.BasicMachines.InductionMachines.ComparisonPolyphase.IMS_Start_PolyphaseStarting of polyphase induction machine with slip rings
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 torqueaimsM|M3.wMechanical: machine speedfeedback.y: zero since difference of three-phase current phasor and scaled polyphase current phasor are equalExtends from Modelica.Icons.Example (Icon for runnable examples).
| 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] |
| aimsData3 | Induction machine data of a three-phase machine |
| aimsDataM | Induction machine data of an m-phase machine |
Modelica.Magnetic.FundamentalWave.Examples.BasicMachines.InductionMachines.ComparisonPolyphase.IMC_DOL_CommonLeakageDirect on line start of polyphase induction machine with squirrel cage
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.
Three equivalent machines with different parameter ratioCommonLeakage are compared.
Note that due to the mode of operation, the behaviour of all three machines is identical.
Only when fed by switching power electronics, parameter ratioCommonLeakage is essential.
Extends from Modelica.Icons.Example (Icon for runnable examples).
| 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] |
| aimcData | Induction machine data |