Air Gap DC
Linear air gap model of a DC machine
Description
Equations
Variables
Connections
Parameters
Modelica Standard Library
The Air Gap DC component models the air gap of a DC machine, without saturation effects. Induced excitation voltage is calculated from the derivative of the magnetic flux, where flux is the excitation inductance multiplied by the excitation current. The induced armature voltage is found by multiplying flux by angular velocity.
ia=iap=−ian
ie=iep=−ien
vai=vap−van=Turns_Ratioψew
vei=vep−ven={0quasiStationaryψ.eotherwise
ψe=Leie
w=φ.flange−φ.support
τelec=Turns_Ratioψeia=τsupport=−τflange
Name
Units
Modelica ID
ia
A
Armature current
ie
Excitation current
ψe
Wb
Excitation flux
psi_e
τelec
Nm
Torque induced by electrical current
tauElectrical
vai
V
Induced armature voltage
vei
Voltage drop across field excitation inductance
w
rads
Angular velocity
flange
Rotation flange
support
Support at which the reaction torque is acting
pinap
Positive armature pin
pin_ap
pinep
Positive excitation pin
pin_ep
pinan
Negative armature pin
pin_an
pinen
Negative excitation pin
pin_en
Default
quasiStationary
True (checked) means ignore electrical transients
Turns Ratio
1
Ratio of armature turns over number of turns of the excitation winding
turnsRatio
Le
H
Excitation inductance
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
Electrical Library
Electrical Machine Components
Electrical Machines
Download Help Document
