PE 304 Lect 1.pdf - Curtin University

Power Electronic Systems
• Most power electronic systems consist of two major
modules:
– The power stage (forward circuit)
– The control stage (feedback circuit)
Simplified block diagram for a power electronic
system
x , x ,......, x
1
1
1
2
y , y ,...... y
p
p
in
out
2
( t)
( t)
2
m
is the total instantaneous
input power in watts
f , f ,....., f
is the total instantaneous
output power in watts
or angular
Efficiency,
η,
is
3
n
are input signals (voltage, current, or angular frequency)
are output signals (voltages, currents, or
are feedback signals : voltages or currents in an electricalsystem,
speed or angular position in a mechanicalsystem.
defined as follows :
P
η =
P
out
in
× 100%
angular frequency)