Modelica.Electrical.Machines.Sensors

Sensors for machine modelling

Information

This package contains sensors that are useful when modelling machines.

Extends from Modelica.Icons.SensorsPackage (Icon for packages containing sensors).

Package Content

Name	Description
VoltageQuasiRMSSensor	Length of space phasor -> RMS voltage
CurrentQuasiRMSSensor	Length of space phasor -> RMS current
ElectricalPowerSensor	Instantaneous power from space phasors
MechanicalPowerSensor	Mechanical power = torque x speed
RotorDisplacementAngle	Rotor lagging angle

Modelica.Electrical.Machines.Sensors.VoltageQuasiRMSSensor

Length of space phasor -> RMS voltage

Information

Measured 3-phase instantaneous voltages are transformed to the corresponding space phasor;
output is length of the space phasor divided by sqrt(2), thus giving in sinusoidal stationary state RMS voltage.

Extends from Modelica.Icons.RotationalSensor (Icon representing a round measurement device).

Connectors

Name Description

V [V]

plug_p

plug_n

Name	Description
V	[V]
plug_p
plug_n

Modelica.Electrical.Machines.Sensors.CurrentQuasiRMSSensor

Length of space phasor -> RMS current

Information

Measured 3-phase instantaneous currents are transformed to the corresponding space phasor;
output is length of the space phasor divided by sqrt(2), thus giving in sinusoidal stationary state RMS current.

Extends from Modelica.Icons.RotationalSensor (Icon representing a round measurement device).

Connectors

Name Description

I [A]

plug_p

plug_n

Name	Description
I	[A]
plug_p
plug_n

Modelica.Electrical.Machines.Sensors.ElectricalPowerSensor

Instantaneous power from space phasors

Information

3-phase instantaneous voltages (plug_p - plug_nv) and currents (plug_p - plug_ni) are transformed to the corresponding space phasors,
which are used to calculate power quantities:
P = instantaneous power, thus giving in stationary state active power.
Q = giving in stationary state reactive power.

Extends from Modelica.Icons.RotationalSensor (Icon representing a round measurement device).

Connectors

Name Description

P [W]

Q [var]

plug_p

plug_ni

plug_nv

Name	Description
P	[W]
Q	[var]
plug_p
plug_ni
plug_nv

Modelica.Electrical.Machines.Sensors.MechanicalPowerSensor

Mechanical power = torque x speed

Information

Calculates (mechanical) power from torque times angular speed.

Extends from Modelica.Icons.RotationalSensor (Icon representing a round measurement device), Modelica.Mechanics.Rotational.Interfaces.PartialTwoFlanges (Partial model for a component with two rotational 1-dim. shaft flanges).

Parameters

Name Description

useSupport Use support or fixed housing

Name	Description
useSupport	Use support or fixed housing

Connectors

Name Description

flange_a Flange of left shaft

flange_b Flange of right shaft

P [W]

support Support at which the reaction torque is acting

Name	Description
flange_a	Flange of left shaft
flange_b	Flange of right shaft
P	[W]
support	Support at which the reaction torque is acting

Modelica.Electrical.Machines.Sensors.RotorDisplacementAngle

Rotor lagging angle

Information

Calculates rotor lagging angle by measuring the stator phase voltages, transforming them to the corresponding space phasor in stator-fixed coordinate system,
rotating the space phasor to the rotor-fixed coordinate system and calculating the angle of this space phasor.

The sensor's housing can be implicitly fixed (useSupport=false).
If the machine's stator also implicitly fixed (useSupport=false), the angle at the flange is equal to the angle of the machine's rotor against the stator.
Otherwise, the sensor's support has to be connected to the machine's support.

Parameters

Name Description

p Number of pole pairs

useSupport Use support or fixed housing

Name	Description
p	Number of pole pairs
useSupport	Use support or fixed housing

Connectors

Name Description

rotorDisplacementAngle [rad]

plug_p

plug_n

flange

support support at which the reaction torque is acting

Name	Description
rotorDisplacementAngle	[rad]
plug_p
plug_n
flange
support	support at which the reaction torque is acting

Automatically generated Mon Sep 23 17:20:31 2013.