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Power Electronics and Motor Drives
book

Power Electronics and Motor Drives

by Bogdan M. Wilamowski, J. David Irwin
October 2018
Intermediate to advanced content levelIntermediate to advanced
1015 pages
40h 24m
English
CRC Press
Content preview from Power Electronics and Motor Drives
20-6 Power Electronics and Motor Drives
bidirectional (Figure 20.4b and c). e ringing load is excited by a variable (Figure 20.4a) that is constant
in the interval α ω
s
t πα and short-circuited in the interval π + α ω
s
t < 2πα, where ω
s
is the
switching angular frequency. e circuit is interrupted during the rest of the period. e interrup-
tion interval shrinks to zero when ω
s
ω
d
. e input variable is square-wave and quasi-square-wave in
Figure 20.4b and c, respectively. e RMS value of the fundamental component is
X X
irms p
=
4
2π
αcos
(20.14)
e output variable changes in proportion to the input. Varying angle α provides another
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Publisher Resources

ISBN: 9781439802861