WOLFRAM SYSTEM MODELER
IM_SlipRingInduction machine with slipring rotor |
SystemModel["Modelica.Electrical.Machines.BasicMachines.InductionMachines.IM_SlipRing"]
This information is part of the Modelica Standard Library maintained by the Modelica Association.
Model of a three-phase induction machine with slipring rotor.
Resistance and stray inductance of stator and rotor are modeled directly in stator respectively rotor phases, then using space phasor transformation and a stator-fixed AirGap model. The machine models take the following loss effects into account:
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 |
nominal current per phase | 100 | A RMS |
nominal torque | 161.4 | Nm |
nominal speed | 1440.45 | rpm |
nominal mechanical output | 24.346 | kW |
efficiency | 92.7 | % |
power factor | 0.875 | |
stator resistance | 0.03 | Ohm per phase at reference temperature |
reference temperature TsRef | 20 | °C |
temperature coefficient alpha20s | 0 | 1/K |
rotor resistance | 0.04 | Ohm per phase at reference temperature |
reference temperature TrRef | 20 | °C |
temperature coefficient alpha20r | 0 | 1/K |
stator reactance Xs | 3 | Ohm per phase |
rotor reactance Xr | 3 | Ohm per phase |
total stray coefficient sigma | 0.0667 | |
turnsRatio | 1 | effective ratio of stator and rotor current |
stator operational temperature TsOperational | 20 | °C |
rotor operational temperature TrOperational | 20 | °C |
These values give the following inductances: | ||
stator stray inductance per phase | Xs * (1 - sqrt(1-sigma))/(2*pi*fNominal) | |
rotor stray inductance | Xr * (1 - sqrt(1-sigma))/(2*pi*fNominal) | |
main field inductance per phase | sqrt(Xs*Xr * (1-sigma))/(2*pi*f) |
Parameter turnsRatio could be obtained from the following relationship
at standstill with open rotor circuit at nominal voltage and nominal frequency,
using the locked-rotor voltage VR, no-load stator current I0 and powerfactor PF0:
turnsRatio * VR = Vs - (Rs + j Xs,sigma) I0
Jr |
Value: Type: Inertia (kg⋅m²) Description: Rotor's moment of inertia |
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useSupport |
Value: false Type: Boolean Description: Enable / disable (=fixed stator) support |
Js |
Value: Jr Type: Inertia (kg⋅m²) Description: Stator's moment of inertia |
useThermalPort |
Value: false Type: Boolean Description: Enable / disable (=fixed temperatures) thermal port |
frictionParameters |
Value: Type: FrictionParameters Description: Friction loss parameter record |
m |
Value: 3 Type: Integer Description: Number of phases |
p |
Value: Type: Integer Description: Number of pole pairs (Integer) |
fsNominal |
Value: Type: Frequency (Hz) Description: Nominal frequency |
TsOperational |
Value: Type: Temperature (K) Description: Operational temperature of stator resistance |
Rs |
Value: Type: Resistance (Ω) Description: Stator resistance per phase at TRef |
TsRef |
Value: Type: Temperature (K) Description: Reference temperature of stator resistance |
alpha20s |
Value: Type: LinearTemperatureCoefficient20 (1/K) Description: Temperature coefficient of stator resistance at 20 degC |
Lszero |
Value: Lssigma Type: Inductance (H) Description: Stator zero sequence inductance |
Lssigma |
Value: Type: Inductance (H) Description: Stator stray inductance per phase |
statorCoreParameters |
Value: Type: CoreParameters Description: Stator core loss parameter record; all parameters refer to stator side |
strayLoadParameters |
Value: Type: StrayLoadParameters Description: Stray load loss parameter record |
Lm |
Value: Type: Inductance (H) Description: Stator main field inductance per phase |
Lrsigma |
Value: Type: Inductance (H) Description: Rotor stray inductance per phase w.r.t. rotor side |
Lrzero |
Value: Lrsigma Type: Inductance (H) Description: Rotor zero sequence inductance w.r.t. rotor side |
Rr |
Value: Type: Resistance (Ω) Description: Rotor resistance per phase at TRef w.r.t. rotor side |
TrRef |
Value: Type: Temperature (K) Description: Reference temperature of rotor resistance |
alpha20r |
Value: Type: LinearTemperatureCoefficient20 (1/K) Description: Temperature coefficient of rotor resistance at 20 degC |
useTurnsRatio |
Value: Type: Boolean Description: Use turnsRatio or calculate from locked-rotor voltage? |
turnsRatio |
Value: Type: Real Description: Effective number of stator turns / effective number of rotor turns |
VsNominal |
Value: Type: Voltage (V) Description: Nominal stator voltage per phase |
VrLockedRotor |
Value: Type: Voltage (V) Description: Locked-rotor voltage per phase |
TrOperational |
Value: Type: Temperature (K) Description: Operational temperature of rotor resistance |
rotorCoreParameters |
Value: Type: CoreParameters Description: Rotor core loss parameter record; all parameters refer to rotor side |
idq_ss |
Default Value: airGap.i_ss Type: Current[2] (A) Description: Stator space phasor current / stator fixed frame |
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idq_sr |
Default Value: airGap.i_sr Type: Current[2] (A) Description: Stator space phasor current / rotor fixed frame |
idq_rs |
Default Value: airGap.i_rs Type: Current[2] (A) Description: Rotor space phasor current / stator fixed frame |
idq_rr |
Default Value: airGap.i_rr Type: Current[2] (A) Description: Rotor space phasor current / rotor fixed frame |
phiMechanical |
Default Value: flange.phi - internalSupport.phi Type: Angle (rad) Description: Mechanical angle of rotor against stator |
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wMechanical |
Default Value: der(phiMechanical) Type: AngularVelocity (rad/s) Description: Mechanical angular velocity of rotor against stator |
tauElectrical |
Default Value: inertiaRotor.flange_a.tau Type: Torque (N⋅m) Description: Electromagnetic torque |
tauShaft |
Default Value: -flange.tau Type: Torque (N⋅m) Description: Shaft torque |
powerBalance |
Type: PowerBalanceIMS Description: Power balance |
vs |
Default Value: plug_sp.pin.v - plug_sn.pin.v Type: Voltage[m] (V) Description: Stator instantaneous voltages |
is |
Default Value: plug_sp.pin.i Type: Current[m] (A) Description: Stator instantaneous currents |
i_0_s |
Default Value: spacePhasorS.zero.i Type: Current (A) Description: Stator zero-sequence current |
i_0_r |
Default Value: spacePhasorR.zero.i Type: Current (A) Description: Rotor zero-sequence current |
vr |
Default Value: plug_rp.pin.v - plug_rn.pin.v Type: Voltage[m] (V) Description: Rotor instantaneous voltages |
ir |
Default Value: plug_rp.pin.i Type: Current[m] (A) Description: Rotor instantaneous currents |
flange |
Type: Flange_a Description: Shaft |
|
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support |
Type: Flange_a Description: Support at which the reaction torque is acting |
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internalSupport |
Type: Support Description: Support/housing flange of a one-dimensional rotational shaft |
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plug_sp |
Type: PositivePlug Description: Positive stator plug |
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plug_sn |
Type: NegativePlug Description: Negative stator plug |
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thermalPort |
Type: ThermalPortIMS Description: Thermal port of induction machine with slipring |
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internalThermalPort |
Type: ThermalPortIMS Description: Thermal port of induction machine with slipring |
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plug_rp |
Type: PositivePlug Description: Positive rotor plug |
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plug_rn |
Type: NegativePlug Description: Negative rotor plug |
frictionParameters |
Type: FrictionParameters Description: Friction loss parameter record |
|
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inertiaRotor |
Type: Inertia Description: 1D-rotational component with inertia |
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inertiaStator |
Type: Inertia Description: 1D-rotational component with inertia |
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fixed |
Type: Fixed Description: Flange fixed in housing at a given angle |
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friction |
Type: Friction Description: Model of angular velocity dependent friction losses |
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statorCoreParameters |
Type: CoreParameters Description: Stator core loss parameter record; all parameters refer to stator side |
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strayLoadParameters |
Type: StrayLoadParameters Description: Stray load loss parameter record |
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powerBalance |
Type: PowerBalanceIMS Description: Power balance |
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rs |
Type: Resistor Description: Ideal linear electrical resistors |
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lssigma |
Type: Inductor Description: Space phasor inductor |
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lszero |
Type: Inductor Description: Ideal linear electrical inductor |
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statorCore |
Type: Core Description: Model of core losses |
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spacePhasorS |
Type: SpacePhasor Description: Physical transformation: three-phase <-> space phasors |
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strayLoad |
Type: StrayLoad Description: Model of stray load losses dependent on current and speed |
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thermalAmbient |
Type: ThermalAmbientIMS Description: Thermal ambient for induction machine with slipring |
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airGap |
Type: AirGapS Description: Airgap in stator-fixed coordinate system |
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rotorCoreParameters |
Type: CoreParameters Description: Rotor core loss parameter record; all parameters refer to rotor side |
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spacePhasorR |
Type: SpacePhasor Description: Physical transformation: three-phase <-> space phasors |
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rr |
Type: Resistor Description: Ideal linear electrical resistors |
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lrsigma |
Type: Inductor Description: Space phasor inductor |
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lrzero |
Type: Inductor Description: Ideal linear electrical inductor |
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rotorCore |
Type: Core Description: Model of core losses |