Speed Dependent Armature Current Limitation - Lenze 4800 Manual

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Configuration
Code Code Name Name
C148 Additional
torque
value 1
C149 Additional
torque
value 2
7.6.2
T a c h o
3
4
± 1 8 0 V
I n c r e m e n t a l
e n c o d e r
R e s o l v e r
V
A B
a r m a t u r e v o l t a g e
E x t e r n a l t o r q u e l i m i t
2
1
0 V = n o t o r q u e
1 0 V = m a x . t o r q u e
A d d i t i o n a l t o r q u e s e t p o i n t 1
A d d i t i o n a l t o r q u e s e t p o i n t 2
7-90
48XX/49XXSHB0399
If the inputs are not assigned, constant values can be assigned via the input
codes. These values can also be stored in EEPROM via C003.
2. Function
The additional torque set-values have a summing influence on the n controller
output. The sum of these signals is limited to –100%.
Possible settings
Lenze Selection
0 -100.0 % M {0.1 %}
max
-200 % M {1%}
max
0 -100.0 % M {0.1 %}
max
-200 % M {1%}
max

Speed dependent armature current limitation

n
o f f s e t
C 0 2 5 / C 0 2 6
C 1 4 5 / C 1 4 6
+
C 0 2 5 / C 0 2 7
C 0 0 5 C o n f i g u r a t i o n
4 1
C 2 5 / C 2 6 C 2 7 C 2 8
4 3
E n c .
c o n s t .
4 2
4 0
-
C 0 2 5 / C 0 2 7
C 2 3 2
I
a c t
I · R - c o m p e n s a t i o n
C 0 2 5 / C 0 2 6
C 1 4 5 / C 1 4 6
+
C 0 2 5 / C 0 2 7
C 1 4 6 / C 1 4 7
C 1 4 6 / C 1 4 7
FIG 7-51 Signal-flow chart (section) for speed-dependent armature current limitation
Purpose
If DC machines are drive with rated armature current in field weakening operation,
the segment voltage (at the armature) can reach impermissibly high values.
Info
+100.0 % M Display only with terminal control. If the
max
terminal control is deactivated, the actual
+200 % M
max
terminal value will be accepted for
operation. In the armature setting range:
100 % M
(C022, C023)
+100.0 % M Display only with terminal control. If the
max
terminal control is deactivated, the actual
+200 % M
max
terminal value will be accepted for
operation. In the armature setting range:
100 % M
(C022/C023)
n a t n - c o n t r o l l e r
s e t
i n % o f n
m a x
C 0 5 0
Q S P
n a c t
n - c o n t r o l l e r
C 0 5 1
+
-
C 0 7 0 V
p n
C 1 9 8
C 0 7 1 T
n n
C 0 7 2 K
d n
1 0 0 %
C 0 4 7
+
-
C 2 8 2 C 1 4 8
C 1 4 9
correspond to 100 % I
max max
correspond to 100 % I
max max
M i n %
s e t
o f M
m a x
C 0 5 6
+ +
I
F a c t
C 3 1 0
C 3 1 1
C 3 1 2
C 3 1 3
C 3 1 4
s p e e d - d e p e n d e n t
c u r r e n t l i m i t a t i o n
I
s e t
C 0 6 3
I
m a x
C 0 2 2 , C 0 2 3
4900Str078