Control Principle - ABB ACS 600 User Manual

Chapter 6 – Firmware Description

Control Principle

6-2
The fundamental theory of line converter operation can be presented
by an equivalent circuit with an AC choke and vector diagrams (below),
where
____ motoring
_ _ _ generating
U network voltage vector
1
U line converter voltage vector
2
U AC choke voltage vector
L
y
"network flux" vector

y
"line converter flux" vector
y
"AC choke flux" vector
L
d
power transfer angle.
jwL
I
U
1
jwLi = U
U
2gen.
U
1
I
U
2 d
I
gen
ACA 635 IGBT Supply Sections
L
U y
2
y
y
L