Page 189 - Rashid, Power Electronics Handbook

178 J. Rodrõ Âguez and A. Weinstein

v ,i
s s
i
s

0 t
v
s

a)
i 100
sn
i 100 90
s1
80
70
60
50
40
30
20
10
0
0 1 2 3 4 5
10 10 10 10 10 10
f [Hz]
b)
FIGURE 11.19 Input current of the single-phase boost recti®er: (a) voltage and current waveforms; and (b) frequency spectrum.

T
1
X C V
V [V] 1 C1
o
i L
s
Load V
415 0
v
L
+ X
400 v C V C2
s T 2
2
385
t
0.2 0.3 0.4 0.5 0.6 0.7 0.8
a)
i a)
s i L
i L
s s
v v
L L
+ +
0 t v v C
s C 1 V s 2 V
C1 C2
b) b) c)
FIGURE 11.20 Response to a change in the load: (a) output-voltage V o ; FIGURE 11.21 Voltage doubler recti®er: (a) power circuit; (b) equiva-
and (b) input current i s . lent circuit with T 1 ON; and (c) equivalent circuit with T 2 ON.