DC Permanent Magnet
Permanent magnet DC machine
Description
Connections
Parameters
Modelica Standard Library
The DC PermanentMagnet (or DC Permanent Magnet) component models a DC Machine with permanent magnets. Armature resistance and inductance are modeled directly after the armature pins, using an Air Gap DC model. Permanent magnet excitation is modeled by a constant equivalent excitation current feeding the air gap.
The following losses are modeled:
heat losses in the temperature dependent armature winding resistance
brush losses in the armature circuit
friction losses
core losses (only eddy current losses, no hysteresis losses)
stray load losses
No saturation is modeled.
Name
Modelica ID
flange
Shaft
support
Support at which the reaction torque is acting
pinap
Positive armature pin
pin_ap
pinan
Negative armature pin
pin_an
thermalPort
Optional thermal port
General Parameters
Default
Units
Jr
0.15
kg⁢m2
Rotor moment of inertia
Js
Stator moment of inertia
Ta,oper
293.15
K
Operational armature temperature
TaOperational
Use Support Flange
false
True (checked) means enable stator support
useSupport
Use Thermal Port
True (checked) means thermal port is enabled
useThermalPort
Brush Losses
V
0
Total voltage drop of brushes, if ibrush>Ilinear
Ilinear
0.01⁢Ianom
A
Current indicating linear voltage region of brush voltage drop
ILinear
See Brush for details of the brush loss model.
Core Losses
Pref
W
Reference rotor core losses
PRef
Vref
Vnom
Reference RMS voltage
VRef
ωref
ωnom
rads
Reference angular velocity
wRef
See Core for details of the core loss model.
Friction Losses
Reference friction losses
pω
2
Exponent of friction
power_w
See Friction for details of the friction loss model.
Stray Load Losses
Iref
Ianom
Reference RMS current
IRef
1
Exponent of stray load loss
See Stray Load for details of the stray load loss model.
Nominal Parameters Parameters
Ia,nom
100
Nominal armature current
IaNominal
47.5⁢π
Nominal rotational speed
wNominal
Ta,nom
Nominal armature temperature
TaNominal
Va,nom
Nominal armature voltage
VaNominal
Nominal Resistances And Inductances Parameters
αa
1K
Temperature coefficient of armature resistance
alpha20a
La
0.0015
H
Armature inductance
Ra
0.05
Ω
Warm armature resistance
Ta,ref
Reference temperature of armature resistance
TaRef
The component described in this topic is from the Modelica Standard Library. To view the original documentation, which includes author and copyright information, click here.
See Also
DC Machines
Electrical Library
Electrical Machines
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