October 2020
Intermediate to advanced
450 pages
15h 32m
English
Content preview from Electrotechnical Systems
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167
5
Electric Machine and
Electric Drive Simulation
5.1 DIRECT CURRENT (DC) MOTORS AND DRIVES
5.1.1 DC Drives with Chopper Control
DC electrical machine (DCM) description is accepted in SimPowerSystems™ as
follows: An armature circuit equation is
UERI L
dI
dt
daaa
a
=+ +
(5.1)
where
U
d
is the DCM armature voltage
E is the emf of DCM
R
a
is the armature circuit resistance
I
a
is the armature current
L
a
is the armature inductance
EK
e
=ω
(5.2)
ω is the rotation speed of DCM, rad/s,
KL
I
eaff
=
(5.3)
L
af
is the mutual inductance of the armature and excitation circuits
I
f
is the excitation current
DCM torque is
TK
I
ee
a
=
(5.4)
Thus, it is supposed that emf and torque a ...
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