Baumuller b maXX BM3000 User Manual

Description of the Software Modules and Parameters
Parameter manual b maXX BM3000
Document no.: 5.12001.07
737
of 820
4
Figure 231: Continuous current limit characteristic by current supporting points and interpolation (see ZFig.
228– on page 733)
Continuous current limit characteristic by approximation of the iron losses
This option serves as an option by the current supporting points and interpolation if the
information for the maximum continuous current is not available by the speed. It can be
activated by speed-dependent modes
Z6.43– bits 0 to 2, value = 2 and contains the ap-
proximation of the iron losses in dependence of the speed which evaluates the l
2
value.
Thereby the iron losses are calculated by the standstill current (
Z107.10–), the nominal
current (Z107.9–), the nominal speed (Z107.7–) and by the smoothed effective speed
(Z18.22–) and are added to the effective l
2
value. The standstill current is used as a ref-
erence for the continuous current, as well (the iron losses are assumed zero at standstill).
In case one of these values is not available (value equals zero) the option cannot be ac
-
tivated. This option is specific to the motor standstill current > motor rated current only.
Between standstill and rated speed this method applies to the continuous current charac
-
teristic quite accurate (within motor manufacturing tolerances); from speeds of great rated
speeds the accuracy decreases steadily with increasing speed but in a conservative man
-
ner (a rather small continuous current is permitted than permitted depending on the motor
data).
Figure 232: Continuous current limit characteristic by approximation of the iron losses (see ZFig. 228– on
page 733)
N
D
N
D
107.72[0] ... 107.72[10]
n
18.22
5000_0359_rev01.cdr
Ref
I
Continuous current limit curve
I
act
'
Speed act. value
I value
2
N
D
N
D
N
D
N
D
N
N
o
I
2
o
I
N
I

22
Ref
I
o
I
107.10
107.7
18.22
107.9
N
I
if
o
I
N
I
,
if
o
I
N
I

,0
{
N
I
,
max()
o
I

5000_0360_rev01.cdr
Standstill current
Nominal speed
Speed actual value
Nominal current
I value
2
I
act

Baumuller b maXX BM3000 Specifications

General

Brand	Baumuller
Model	b maXX BM3000
Category	Measuring Instruments
Language	English