October 2020
Intermediate to advanced
450 pages
15h 32m
English
Content preview from Electrotechnical Systems
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90 Electrotechnical Systems
snubber, it is necessary to set C
s
= inf. The numerical instability of simulation can
appear in the discrete mode when diodes and thyristors are used. To prevent it, it is
recommended to use the R
s
− C
s
snubber with the following parameters
C
P
fV
R
T
C
s
n
n
s
s
s
<>
000.
,
1
2
2
2
π
where
P
n
is the nominal converter power (VA)
f is the fundamental frequency (Hz)
V
n
is the nominal line-to-line voltage (V, rms)
T
s
is the sample time (s)
The forced-commutated devices operate satisfactorily with the purely resistive snub-
ber, and the gate pulses come to the devices, but when they are blocked, the bridge
changes into the diode one, and R
s
− ...
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