WOLFRAM SYSTEM MODELER
SMPM_BrakingTest example: PermanentMagnetSynchronousMachine acting as brake |
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Diagram
Wolfram Language
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SystemModel["Modelica.Magnetic.FundamentalWave.Examples.BasicMachines.SynchronousMachines.SMPM_Braking"]
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Information
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. The RonDiode and GoffDiode parameters of the diode bridge are both increased to 1e-4 to avoid numerical issues when the variable resistor voltage gets close to zero.
Parameters (4)
| R |
Value: 1 Type: Resistance (Ω) Description: Nominal braking resistance |
|---|---|
| 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 |
Type: SM_PermanentMagnetData Description: Synchronous machine data |
Components (15)
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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 |
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speedSensor |
Type: SpeedSensor Description: Ideal sensor to measure the absolute angular velocity of flange |
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smpmData |
Type: SM_PermanentMagnetData Description: Synchronous machine data |
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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 |
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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 |