WOLFRAM SYSTEM MODELER

SMPM_Braking

Test example: PermanentMagnetSynchronousMachine acting as brake

Diagram

Wolfram Language

In[1]:=
SystemModel["Modelica.Electrical.Machines.Examples.SynchronousMachines.SMPM_Braking"]
Out[1]:=

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.

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

Value:

Type: SM_PermanentMagnetData

Description: Synchronous machine data

Components (15)

smpm

Type: SM_PermanentMagnet

Description: Permanent magnet synchronous machine

ground

Type: Ground

Description: Ground node

terminalBox

Type: TerminalBox

Description: Terminal box Y/D-connection

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

diodeBridge2mPulse

Type: DiodeBridge2mPulse

Description: 2*m pulse diode rectifier bridge

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

limiter

Type: Limiter

Description: Limit the range of a signal

ac2dc

Type: Gain

Description: Output the product of a gain value with the input signal

starM

Type: Star

Description: Star-connection

voltageQuasiRMSSensor

Type: VoltageQuasiRMSSensor

Description: Length of space phasor -> RMS voltage

grounding

Type: Resistor

Description: Ideal linear electrical resistor