WOLFRAM SYSTEM MODELER
SMPM_BrakingTest example: PermanentMagnetSynchronousMachine acting as brake |
SystemModel["Modelica.Magnetic.FundamentalWave.Examples.BasicMachines.SynchronousMachines.SMPM_Braking"]
This information is part of the Modelica Standard Library maintained by the Modelica Association.
A synchronous machine with permanent magnets starts braking from nominal speed by feeding a diode bridge, which in turn feeds a braking resistor. Since induced voltage is reduced proportional to falling speed, the braking resistance is set proportional to speed to achieve constant current and torque.
Default machine parameters are used
R |
Value: 1 Type: Resistance (Ω) Description: Nominal braking resistance |
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wNominal |
Value: 2 * pi * smpmData.fsNominal / smpmData.p Type: AngularVelocity (rad/s) Description: Nominal speed |
JLoad |
Value: 0.29 Type: Inertia (kg⋅m²) Description: Load's moment of inertia |
smpmData |
Value: Type: SM_PermanentMagnetData Description: Synchronous machine data |
smpm |
Type: SM_PermanentMagnet Description: Permanent magnet synchronous machine with optional damper cage |
|
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ground |
Type: Ground Description: Ground node |
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terminalBox |
Type: TerminalBox Description: Terminal box Y/D-connection |
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inertiaLoad |
Type: Inertia Description: 1D-rotational component with inertia |
|
speedSensor |
Type: SpeedSensor Description: Ideal sensor to measure the absolute flange angular velocity |
|
smpmData |
Type: SM_PermanentMagnetData Description: Synchronous machine data |
|
currentQuasiRMSSensor |
Type: CurrentQuasiRMSSensor Description: Length of space phasor -> RMS current |
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diodeBridge2mPulse |
Type: DiodeBridge2mPulse Description: 2*m pulse diode rectifier bridge |
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variableResistor |
Type: VariableResistor Description: Ideal linear electrical resistor with variable resistance |
|
gain |
Type: Gain Description: Output the product of a gain value with the input signal |
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limiter |
Type: Limiter Description: Limit the range of a signal |
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ac2dc |
Type: Gain Description: Output the product of a gain value with the input signal |
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starM |
Type: Star Description: Star-connection |
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voltageQuasiRMSSensor |
Type: VoltageQuasiRMSSensor Description: Length of space phasor -> RMS voltage |
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grounding |
Type: Resistor Description: Ideal linear electrical resistor |