Environmental Engineering Reference
In-Depth Information
Smoothing
capacitor
i
b
Supply
Supply
impedance
i
s
v
s
v
l
Load
Other
customers
v
c
Figure 4.24
Circuit of a diode bridge rectifi er with a smoothing capacitor and a supply impedance
v
s
t
v
l
i
b
i
s
v
c
Figure 4.25
Waveforms of a diode bridge rectifi er with a smoothing capacitor
by a series of pulses shown as
i
b
in the fi gure. Because the duration of the pulses is short,
their amplitude must be high, if the same average power is to be supplied to the load as it
was supplied before the capacitor insertion. The downside of this arrangement is that the
current drawn from the AC source
i
s
is no longer a sine wave. Instead, it is a series of positive
and negative pulses.
